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<button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2411.00509">arXiv:2411.00509</a> <span> [<a href="https://arxiv.org/pdf/2411.00509">pdf</a>, <a href="https://arxiv.org/format/2411.00509">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> </div> <p class="title is-5 mathjax"> Isospin breaking in the $^{71}$Kr and $^{71}$Br mirror system </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Algora%2C+A">A. Algora</a>, <a href="/search/nucl-ex?searchtype=author&query=Vit%C3%A9z-Sveiczer%2C+A">A. Vit茅z-Sveiczer</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Kiss%2C+G+G">G. G. Kiss</a>, <a href="/search/nucl-ex?searchtype=author&query=Rubio%2C+B">B. Rubio</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Angelis%2C+G">G. de Angelis</a>, <a href="/search/nucl-ex?searchtype=author&query=Recchia%2C+F">F. Recchia</a>, <a href="/search/nucl-ex?searchtype=author&query=Nishimura%2C+S">S. Nishimura</a>, <a href="/search/nucl-ex?searchtype=author&query=Rodriguez%2C+T">T. Rodriguez</a>, <a href="/search/nucl-ex?searchtype=author&query=Sarriguren%2C+P">P. Sarriguren</a>, <a href="/search/nucl-ex?searchtype=author&query=Agramunt%2C+J">J. Agramunt</a>, <a href="/search/nucl-ex?searchtype=author&query=Guadilla%2C+V">V. Guadilla</a>, <a href="/search/nucl-ex?searchtype=author&query=Montaner-Piz%C3%A1%2C+A">A. Montaner-Piz谩</a>, <a href="/search/nucl-ex?searchtype=author&query=Morales%2C+A+I">A. I. Morales</a>, <a href="/search/nucl-ex?searchtype=author&query=Orrigo%2C+S+E+A">S. E. A. Orrigo</a>, <a href="/search/nucl-ex?searchtype=author&query=Napoli%2C+D">D. Napoli</a>, <a href="/search/nucl-ex?searchtype=author&query=Lenzi%2C+S+M">S. M. Lenzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Boso%2C+A">A. Boso</a>, <a href="/search/nucl-ex?searchtype=author&query=Phong%2C+V+H">V. H. Phong</a>, <a href="/search/nucl-ex?searchtype=author&query=Wu%2C+J">J. Wu</a>, <a href="/search/nucl-ex?searchtype=author&query=S%C3%B6derstr%C3%B6m%2C+P+-">P. -A. S枚derstr枚m</a>, <a href="/search/nucl-ex?searchtype=author&query=Sumikama%2C+T">T. Sumikama</a>, <a href="/search/nucl-ex?searchtype=author&query=Suzuki%2C+H">H. Suzuki</a>, <a href="/search/nucl-ex?searchtype=author&query=Takeda%2C+H">H. Takeda</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahn%2C+D+S">D. S. Ahn</a> , et al. (43 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2411.00509v1-abstract-short" style="display: inline;"> Isospin symmetry is a fundamental concept in nuclear physics. Even though isospin symmetry is partially broken, it holds approximately for most nuclear systems, which makes exceptions very interesting from the nuclear structure perspective. In this framework, it is expected that the spins and parities of the ground states of mirror nuclei should be the same, in particular for the simplest systems… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.00509v1-abstract-full').style.display = 'inline'; document.getElementById('2411.00509v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2411.00509v1-abstract-full" style="display: none;"> Isospin symmetry is a fundamental concept in nuclear physics. Even though isospin symmetry is partially broken, it holds approximately for most nuclear systems, which makes exceptions very interesting from the nuclear structure perspective. In this framework, it is expected that the spins and parities of the ground states of mirror nuclei should be the same, in particular for the simplest systems where a proton is exchanged with a neutron or vice versa. In this work, we present evidence that this assumption is broken in the mirror pair $^{71}$Br and $^{71}$Kr system. Our conclusions are based on a high-statistics $尾$ decay study of $^{71}$Kr and on state-of-the-art shell model calculations. In our work, we also found evidence of a new state in $^{70}$Se, populated in the $尾$-delayed proton emission process which can be interpreted as the long sought coexisting 0$^+$ state. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.00509v1-abstract-full').style.display = 'none'; document.getElementById('2411.00509v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 November, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages with references, 3 figures. Supplemental material 4 pages (1 table, 3 figures)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2310.07357">arXiv:2310.07357</a> <span> [<a href="https://arxiv.org/pdf/2310.07357">pdf</a>, <a href="https://arxiv.org/format/2310.07357">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Isospin symmetry in the $T = 1, A = 62$ triplet </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Wimmer%2C+K">K. Wimmer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ruotsalainen%2C+P">P. Ruotsalainen</a>, <a href="/search/nucl-ex?searchtype=author&query=Lenzi%2C+S+M">S. M. Lenzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=H%C3%BCy%C3%BCk%2C+T">T. H眉y眉k</a>, <a href="/search/nucl-ex?searchtype=author&query=Browne%2C+F">F. Browne</a>, <a href="/search/nucl-ex?searchtype=author&query=Doornenbal%2C+P">P. Doornenbal</a>, <a href="/search/nucl-ex?searchtype=author&query=Koiwai%2C+T">T. Koiwai</a>, <a href="/search/nucl-ex?searchtype=author&query=Arici%2C+T">T. Arici</a>, <a href="/search/nucl-ex?searchtype=author&query=Auranen%2C+K">K. Auranen</a>, <a href="/search/nucl-ex?searchtype=author&query=Bentley%2C+M+A">M. A. Bentley</a>, <a href="/search/nucl-ex?searchtype=author&query=Cort%C3%A9s%2C+M+L">M. L. Cort茅s</a>, <a href="/search/nucl-ex?searchtype=author&query=Delafosse%2C+C">C. Delafosse</a>, <a href="/search/nucl-ex?searchtype=author&query=Eronen%2C+T">T. Eronen</a>, <a href="/search/nucl-ex?searchtype=author&query=Ge%2C+Z">Z. Ge</a>, <a href="/search/nucl-ex?searchtype=author&query=Grahn%2C+T">T. Grahn</a>, <a href="/search/nucl-ex?searchtype=author&query=Greenlees%2C+P+T">P. T. Greenlees</a>, <a href="/search/nucl-ex?searchtype=author&query=Illana%2C+A">A. Illana</a>, <a href="/search/nucl-ex?searchtype=author&query=Imai%2C+N">N. Imai</a>, <a href="/search/nucl-ex?searchtype=author&query=Joukainen%2C+H">H. Joukainen</a>, <a href="/search/nucl-ex?searchtype=author&query=Julin%2C+R">R. Julin</a>, <a href="/search/nucl-ex?searchtype=author&query=Jungclaus%2C+A">A. Jungclaus</a>, <a href="/search/nucl-ex?searchtype=author&query=Jutila%2C+H">H. Jutila</a>, <a href="/search/nucl-ex?searchtype=author&query=Kankainen%2C+A">A. Kankainen</a>, <a href="/search/nucl-ex?searchtype=author&query=Kitamura%2C+N">N. Kitamura</a> , et al. (22 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2310.07357v1-abstract-short" style="display: inline;"> Excited states in the $T_z = 0, -1$ nuclei $^{62}$Ga and $^{62}$Ge were populated in direct reactions of relativistic radioactive ion beams at the RIBF. Coincident \grays were measured with the DALI2$^+$ array and uniquely assigned to the $A=62$ isobars. In addition, $^{62}$Ge was also studied independently at JYFL-ACCLAB using the ${}^{24}$Mg(${}^{40}$Ca,$2n$)${}^{62}$Ge fusion-evaporation reacti… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.07357v1-abstract-full').style.display = 'inline'; document.getElementById('2310.07357v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2310.07357v1-abstract-full" style="display: none;"> Excited states in the $T_z = 0, -1$ nuclei $^{62}$Ga and $^{62}$Ge were populated in direct reactions of relativistic radioactive ion beams at the RIBF. Coincident \grays were measured with the DALI2$^+$ array and uniquely assigned to the $A=62$ isobars. In addition, $^{62}$Ge was also studied independently at JYFL-ACCLAB using the ${}^{24}$Mg(${}^{40}$Ca,$2n$)${}^{62}$Ge fusion-evaporation reaction. The first excited $T=1, J^蟺=2^+$ states in $^{62}$Ga and $^{62}$Ge were identified at $979(1)$ and $965(1)$~keV, respectively, resolving discrepant interpretations in the literature. States beyond the first $2^+$ state in $^{62}$Ge were also identified for the first time in the present work. The results are compared with shell-model calculations in the $fp$ model space. Mirror and triplet energy differences are analyzed in terms of individual charge-symmetry and charge-independence breaking contributions. The MED results confirm the shrinkage of the $p$-orbits' radii when they are occupied by at least one nucleon on average. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.07357v1-abstract-full').style.display = 'none'; document.getElementById('2310.07357v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">aceepted Phys. Lett. B</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2306.16189">arXiv:2306.16189</a> <span> [<a href="https://arxiv.org/pdf/2306.16189">pdf</a>, <a href="https://arxiv.org/format/2306.16189">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2023.138038">10.1016/j.physletb.2023.138038 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Intruder configurations in $^{29}$Ne at the transition into the island of inversion: Detailed structure study of $^{28}$Ne </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Wang%2C+H">H. Wang</a>, <a href="/search/nucl-ex?searchtype=author&query=Yasuda%2C+M">M. Yasuda</a>, <a href="/search/nucl-ex?searchtype=author&query=Kondo%2C+Y">Y. Kondo</a>, <a href="/search/nucl-ex?searchtype=author&query=Nakamura%2C+T">T. Nakamura</a>, <a href="/search/nucl-ex?searchtype=author&query=Tostevin%2C+J+A">J. A. Tostevin</a>, <a href="/search/nucl-ex?searchtype=author&query=Ogata%2C+K">K. Ogata</a>, <a href="/search/nucl-ex?searchtype=author&query=Otsuka%2C+T">T. Otsuka</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Shimizu%2C+N">N. Shimizu</a>, <a href="/search/nucl-ex?searchtype=author&query=Yoshida%2C+K">K. Yoshida</a>, <a href="/search/nucl-ex?searchtype=author&query=Achouri%2C+N+L">N. L. Achouri</a>, <a href="/search/nucl-ex?searchtype=author&query=Falou%2C+H+A">H. Al Falou</a>, <a href="/search/nucl-ex?searchtype=author&query=Atar%2C+L">L. Atar</a>, <a href="/search/nucl-ex?searchtype=author&query=Aumann%2C+T">T. Aumann</a>, <a href="/search/nucl-ex?searchtype=author&query=Baba%2C+H">H. Baba</a>, <a href="/search/nucl-ex?searchtype=author&query=Boretzky%2C+K">K. Boretzky</a>, <a href="/search/nucl-ex?searchtype=author&query=Caesar%2C+C">C. Caesar</a>, <a href="/search/nucl-ex?searchtype=author&query=Calvet%2C+D">D. Calvet</a>, <a href="/search/nucl-ex?searchtype=author&query=Chae%2C+H">H. Chae</a>, <a href="/search/nucl-ex?searchtype=author&query=Chiga%2C+N">N. Chiga</a>, <a href="/search/nucl-ex?searchtype=author&query=Corsi%2C+A">A. Corsi</a>, <a href="/search/nucl-ex?searchtype=author&query=Crawford%2C+H+L">H. L. Crawford</a>, <a href="/search/nucl-ex?searchtype=author&query=Delaunay%2C+F">F. Delaunay</a>, <a href="/search/nucl-ex?searchtype=author&query=Delbart%2C+A">A. Delbart</a>, <a href="/search/nucl-ex?searchtype=author&query=Deshayes%2C+Q">Q. Deshayes</a> , et al. (71 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2306.16189v1-abstract-short" style="display: inline;"> Detailed $纬$-ray spectroscopy of the exotic neon isotope $^{28}$Ne has been performed for the first time using the one-neutron removal reaction from $^{29}$Ne on a liquid hydrogen target at 240~MeV/nucleon. Based on an analysis of parallel momentum distributions, a level scheme with spin-parity assignments has been constructed for $^{28}$Ne and the negative-parity states are identified for the fir… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.16189v1-abstract-full').style.display = 'inline'; document.getElementById('2306.16189v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2306.16189v1-abstract-full" style="display: none;"> Detailed $纬$-ray spectroscopy of the exotic neon isotope $^{28}$Ne has been performed for the first time using the one-neutron removal reaction from $^{29}$Ne on a liquid hydrogen target at 240~MeV/nucleon. Based on an analysis of parallel momentum distributions, a level scheme with spin-parity assignments has been constructed for $^{28}$Ne and the negative-parity states are identified for the first time. The measured partial cross sections and momentum distributions reveal a significant intruder $p$-wave strength providing evidence of the breakdown of the $N=20$ and $N=28$ shell gaps. Only a weak, possible $f$-wave strength was observed to bound final states. Large-scale shell-model calculations with different effective interactions do not reproduce the large $p$-wave and small $f$-wave strength observed experimentally, indicating an ongoing challenge for a complete theoretical description of the transition into the island of inversion along the Ne isotopic chain. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.16189v1-abstract-full').style.display = 'none'; document.getElementById('2306.16189v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 June, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Lett.B 843 (2023) 138038 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2302.14382">arXiv:2302.14382</a> <span> [<a href="https://arxiv.org/pdf/2302.14382">pdf</a>, <a href="https://arxiv.org/format/2302.14382">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> N=16 magicity revealed at the proton drip-line through the study of 35Ca </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Lalanne%2C+L">L. Lalanne</a>, <a href="/search/nucl-ex?searchtype=author&query=Sorlin%2C+O">O. Sorlin</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Assi%C3%A9%2C+M">M. Assi茅</a>, <a href="/search/nucl-ex?searchtype=author&query=Hammache%2C+F">F. Hammache</a>, <a href="/search/nucl-ex?searchtype=author&query=Koyama%2C+S">S. Koyama</a>, <a href="/search/nucl-ex?searchtype=author&query=Suzuki%2C+D">D. Suzuki</a>, <a href="/search/nucl-ex?searchtype=author&query=Flavigny%2C+F">F. Flavigny</a>, <a href="/search/nucl-ex?searchtype=author&query=Girard-Alcindor%2C+V">V. Girard-Alcindor</a>, <a href="/search/nucl-ex?searchtype=author&query=Lemasson%2C+A">A. Lemasson</a>, <a href="/search/nucl-ex?searchtype=author&query=Matta%2C+A">A. Matta</a>, <a href="/search/nucl-ex?searchtype=author&query=Roger%2C+T">T. Roger</a>, <a href="/search/nucl-ex?searchtype=author&query=Beaumel%2C+D">D. Beaumel</a>, <a href="/search/nucl-ex?searchtype=author&query=Blumenfeld%2C+Y">Y Blumenfeld</a>, <a href="/search/nucl-ex?searchtype=author&query=Brown%2C+B+A">B. A. Brown</a>, <a href="/search/nucl-ex?searchtype=author&query=Santos%2C+F+D+O">F. De Oliveira Santos</a>, <a href="/search/nucl-ex?searchtype=author&query=Delaunay%2C+F">F. Delaunay</a>, <a href="/search/nucl-ex?searchtype=author&query=de+S%C3%A9r%C3%A9ville%2C+N">N. de S茅r茅ville</a>, <a href="/search/nucl-ex?searchtype=author&query=Franchoo%2C+S">S. Franchoo</a>, <a href="/search/nucl-ex?searchtype=author&query=Gibelin%2C+J">J. Gibelin</a>, <a href="/search/nucl-ex?searchtype=author&query=Guillot%2C+J">J. Guillot</a>, <a href="/search/nucl-ex?searchtype=author&query=Kamalou%2C+O">O. Kamalou</a>, <a href="/search/nucl-ex?searchtype=author&query=Kitamura%2C+N">N. Kitamura</a>, <a href="/search/nucl-ex?searchtype=author&query=Lapoux%2C+V">V. Lapoux</a>, <a href="/search/nucl-ex?searchtype=author&query=Mauss%2C+B">B. Mauss</a> , et al. (5 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2302.14382v1-abstract-short" style="display: inline;"> The last proton bound calcium isotope $^{35}$Ca has been studied for the first time, using the $^{37}$Ca($p, t$)$^{35}$Ca two neutron transfer reaction. The radioactive $^{37}$Ca nuclei, produced by the LISE spectrometer at GANIL, interacted with the protons of the liquid hydrogen target CRYPTA, to produce tritons $t$ that were detected in the MUST2 detector array, in coincidence with the heavy re… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.14382v1-abstract-full').style.display = 'inline'; document.getElementById('2302.14382v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2302.14382v1-abstract-full" style="display: none;"> The last proton bound calcium isotope $^{35}$Ca has been studied for the first time, using the $^{37}$Ca($p, t$)$^{35}$Ca two neutron transfer reaction. The radioactive $^{37}$Ca nuclei, produced by the LISE spectrometer at GANIL, interacted with the protons of the liquid hydrogen target CRYPTA, to produce tritons $t$ that were detected in the MUST2 detector array, in coincidence with the heavy residues Ca or Ar. The atomic mass of $^{35}$Ca and the energy of its first 3/2$^+$ state are reported. A large $N=16$ gap of 4.61(11) MeV is deduced from the mass measurement, which together with other measured properties, makes $^{36}$Ca a doubly-magic nucleus. The $N = 16$ shell gaps in $^{36}$Ca and $^{24}$O are of similar amplitude, at both edges of the valley of stability. This feature is discussed in terms of nuclear forces involved, within state-of-the-art shell model calculations. Even though the global agreement with data is quite convincing, the calculations underestimate the size of the $N = 16$ gap in 36Ca by 840(110) keV. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.14382v1-abstract-full').style.display = 'none'; document.getElementById('2302.14382v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 February, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2302.11607">arXiv:2302.11607</a> <span> [<a href="https://arxiv.org/pdf/2302.11607">pdf</a>, <a href="https://arxiv.org/format/2302.11607">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.130.242501">10.1103/PhysRevLett.130.242501 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Microsecond Isomer at the N=20 Island of Shape Inversion Observed at FRIB </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Gray%2C+T+J">T. J. Gray</a>, <a href="/search/nucl-ex?searchtype=author&query=Allmond%2C+J+M">J. M. Allmond</a>, <a href="/search/nucl-ex?searchtype=author&query=Xu%2C+Z">Z. Xu</a>, <a href="/search/nucl-ex?searchtype=author&query=King%2C+T+T">T. T. King</a>, <a href="/search/nucl-ex?searchtype=author&query=Lubna%2C+R+S">R. S. Lubna</a>, <a href="/search/nucl-ex?searchtype=author&query=Crawford%2C+H+L">H. L. Crawford</a>, <a href="/search/nucl-ex?searchtype=author&query=Tripathi%2C+V">V. Tripathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Crider%2C+B+P">B. P. Crider</a>, <a href="/search/nucl-ex?searchtype=author&query=Grzywacz%2C+R">R. Grzywacz</a>, <a href="/search/nucl-ex?searchtype=author&query=Liddick%2C+S+N">S. N. Liddick</a>, <a href="/search/nucl-ex?searchtype=author&query=Macchiavelli%2C+A+O">A. O. Macchiavelli</a>, <a href="/search/nucl-ex?searchtype=author&query=Miyagi%2C+T">T. Miyagi</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Andalib%2C+A">A. Andalib</a>, <a href="/search/nucl-ex?searchtype=author&query=Argo%2C+E">E. Argo</a>, <a href="/search/nucl-ex?searchtype=author&query=Benetti%2C+C">C. Benetti</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhattacharya%2C+S">S. Bhattacharya</a>, <a href="/search/nucl-ex?searchtype=author&query=Campbell%2C+C+M">C. M. Campbell</a>, <a href="/search/nucl-ex?searchtype=author&query=Carpenter%2C+M+P">M. P. Carpenter</a>, <a href="/search/nucl-ex?searchtype=author&query=Chan%2C+J">J. Chan</a>, <a href="/search/nucl-ex?searchtype=author&query=Chester%2C+A">A. Chester</a>, <a href="/search/nucl-ex?searchtype=author&query=Christie%2C+J">J. Christie</a>, <a href="/search/nucl-ex?searchtype=author&query=Clark%2C+B+R">B. R. Clark</a>, <a href="/search/nucl-ex?searchtype=author&query=Cox%2C+I">I. Cox</a>, <a href="/search/nucl-ex?searchtype=author&query=Doetsch%2C+A+A">A. A. Doetsch</a> , et al. (41 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2302.11607v2-abstract-short" style="display: inline;"> Excited-state spectroscopy from the first Facility for Rare Isotope Beams (FRIB) experiment is reported. A 24(2)-$渭$s isomer was observed with the FRIB Decay Station initiator (FDSi) through a cascade of 224- and 401-keV $纬$ rays in coincidence with $^{32}\textrm{Na}$ nuclei. This is the only known microsecond isomer ($1{\text{ }渭\text{s}}\leq T_{1/2} < 1\text{ ms}$) in the region. This nucleus is… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.11607v2-abstract-full').style.display = 'inline'; document.getElementById('2302.11607v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2302.11607v2-abstract-full" style="display: none;"> Excited-state spectroscopy from the first Facility for Rare Isotope Beams (FRIB) experiment is reported. A 24(2)-$渭$s isomer was observed with the FRIB Decay Station initiator (FDSi) through a cascade of 224- and 401-keV $纬$ rays in coincidence with $^{32}\textrm{Na}$ nuclei. This is the only known microsecond isomer ($1{\text{ }渭\text{s}}\leq T_{1/2} < 1\text{ ms}$) in the region. This nucleus is at the heart of the $N=20$ island of shape inversion and is at the crossroads of spherical shell-model, deformed shell-model, and ab initio theories. It can be represented as the coupling of a proton hole and neutron particle to $^{32}\textrm{Mg}$, $^{32}\textrm{Mg}+蟺^{-1} + 谓^{+1}$. This odd-odd coupling and isomer formation provides a sensitive measure of the underlying shape degrees of freedom of $^{32}\textrm{Mg}$, where the onset of spherical-to-deformed shape inversion begins with a low-lying deformed $2^+$ state at 885 keV and a low-lying shape-coexisting $0_2^+$ state at 1058 keV. We suggest two possible explanations for the 625-keV isomer in $^{32}$Na: a $6^-$ spherical shape isomer that decays by $E2$ or a $0^+$ deformed spin isomer that decays by $M2$. The present results and calculations are most consistent with the latter, indicating that the low-lying states are dominated by deformation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.11607v2-abstract-full').style.display = 'none'; document.getElementById('2302.11607v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 April, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 February, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 5 figures, accepted by Physical Review Letters</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2301.12002">arXiv:2301.12002</a> <span> [<a href="https://arxiv.org/pdf/2301.12002">pdf</a>, <a href="https://arxiv.org/format/2301.12002">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.109.L061301">10.1103/PhysRevC.109.L061301 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> New isomeric transition in $^{36}$Mg: Bridging the N=20 and N=28 islands of inversion </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Madurga%2C+M">M. Madurga</a>, <a href="/search/nucl-ex?searchtype=author&query=Christie%2C+J+M">J. M. Christie</a>, <a href="/search/nucl-ex?searchtype=author&query=Xu%2C+Z">Z. Xu</a>, <a href="/search/nucl-ex?searchtype=author&query=Grzywacz%2C+R">R. Grzywacz</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=King%2C+T">T. King</a>, <a href="/search/nucl-ex?searchtype=author&query=Allmond%2C+J+M">J. M. Allmond</a>, <a href="/search/nucl-ex?searchtype=author&query=Chester%2C+A">A. Chester</a>, <a href="/search/nucl-ex?searchtype=author&query=Cox%2C+I">I. Cox</a>, <a href="/search/nucl-ex?searchtype=author&query=Farr%2C+J">J. Farr</a>, <a href="/search/nucl-ex?searchtype=author&query=Fletcher%2C+I">I. Fletcher</a>, <a href="/search/nucl-ex?searchtype=author&query=Heideman%2C+J">J. Heideman</a>, <a href="/search/nucl-ex?searchtype=author&query=Hoskins%2C+D">D. Hoskins</a>, <a href="/search/nucl-ex?searchtype=author&query=Laminack%2C+A">A. Laminack</a>, <a href="/search/nucl-ex?searchtype=author&query=Liddick%2C+S">S. Liddick</a>, <a href="/search/nucl-ex?searchtype=author&query=Neupane%2C+S">S. Neupane</a>, <a href="/search/nucl-ex?searchtype=author&query=Richard%2C+A+L">A. L. Richard</a>, <a href="/search/nucl-ex?searchtype=author&query=Shimizu%2C+N">N. Shimizu</a>, <a href="/search/nucl-ex?searchtype=author&query=Shuai%2C+P">P. Shuai</a>, <a href="/search/nucl-ex?searchtype=author&query=Siegl%2C+K">K. Siegl</a>, <a href="/search/nucl-ex?searchtype=author&query=Utsuno%2C+Y">Y. Utsuno</a>, <a href="/search/nucl-ex?searchtype=author&query=Wagenknecht%2C+P">P. Wagenknecht</a>, <a href="/search/nucl-ex?searchtype=author&query=Yokoyama%2C+R">R. Yokoyama</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2301.12002v3-abstract-short" style="display: inline;"> We observed a new isomeric gamma transition at 168 keV in $^{36}$Mg, with a half-life of T$_{1/2}$=[130-500]$(\pm40)(^{+800}_{-20})_{sys}$ ns. We propose that the observed transition de-excites a new 0$^+$ isomeric state and populates the previously known first 2$^+$ state. The existence of this isomer is consistent with the predictions of the large-scale shell model calculations of $^{36}$Mg usin… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.12002v3-abstract-full').style.display = 'inline'; document.getElementById('2301.12002v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2301.12002v3-abstract-full" style="display: none;"> We observed a new isomeric gamma transition at 168 keV in $^{36}$Mg, with a half-life of T$_{1/2}$=[130-500]$(\pm40)(^{+800}_{-20})_{sys}$ ns. We propose that the observed transition de-excites a new 0$^+$ isomeric state and populates the previously known first 2$^+$ state. The existence of this isomer is consistent with the predictions of the large-scale shell model calculations of $^{36}$Mg using the sdpf-u-mix interaction. The observed excitation energy of the second 0$^+$ state is caused by the small energy separation between two prolate-deformed configurations where the intruder configuration corresponds to two neutron excitations from the {\it sd} to the {\it pf} shell. Within this interpretation, $^{36}$Mg becomes the crossing point between nuclei in which ground state deformed/superdeformed configurations are caused by the dominance of N=20 intruders ($^{32,34}$Mg) and nuclei where deformed configurations are associated with N=28 intruders ($^{38}$Mg and beyond). We found the lack of three-body monopole corrections in other effective interactions results in a predominance of N=20 intruder configurations past $^{38}$Mg incompatible with our observation. We conclude that $^{36}$Mg bridges the N=20 and N=28 islands of inversion, forming the so-called Big Island of Deformation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.12002v3-abstract-full').style.display = 'none'; document.getElementById('2301.12002v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 January, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 109, L061301 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2202.12820">arXiv:2202.12820</a> <span> [<a href="https://arxiv.org/pdf/2202.12820">pdf</a>, <a href="https://arxiv.org/format/2202.12820">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.105.034318">10.1103/PhysRevC.105.034318 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> In-beam $纬$-ray spectroscopy of $^{32}$Mg via direct reactions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Kitamura%2C+N">N. Kitamura</a>, <a href="/search/nucl-ex?searchtype=author&query=Wimmer%2C+K">K. Wimmer</a>, <a href="/search/nucl-ex?searchtype=author&query=Miyagi%2C+T">T. Miyagi</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Shimizu%2C+N">N. Shimizu</a>, <a href="/search/nucl-ex?searchtype=author&query=Tostevin%2C+J+A">J. A. Tostevin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bader%2C+V+M">V. M. Bader</a>, <a href="/search/nucl-ex?searchtype=author&query=Bancroft%2C+C">C. Bancroft</a>, <a href="/search/nucl-ex?searchtype=author&query=Barofsky%2C+D">D. Barofsky</a>, <a href="/search/nucl-ex?searchtype=author&query=Baugher%2C+T">T. Baugher</a>, <a href="/search/nucl-ex?searchtype=author&query=Bazin%2C+D">D. Bazin</a>, <a href="/search/nucl-ex?searchtype=author&query=Berryman%2C+J+S">J. S. Berryman</a>, <a href="/search/nucl-ex?searchtype=author&query=Bildstein%2C+V">V. Bildstein</a>, <a href="/search/nucl-ex?searchtype=author&query=Gade%2C+A">A. Gade</a>, <a href="/search/nucl-ex?searchtype=author&query=Imai%2C+N">N. Imai</a>, <a href="/search/nucl-ex?searchtype=author&query=Kr%C3%B6ll%2C+T">T. Kr枚ll</a>, <a href="/search/nucl-ex?searchtype=author&query=Langer%2C+C">C. Langer</a>, <a href="/search/nucl-ex?searchtype=author&query=Lloyd%2C+J">J. Lloyd</a>, <a href="/search/nucl-ex?searchtype=author&query=Lunderberg%2C+E">E. Lunderberg</a>, <a href="/search/nucl-ex?searchtype=author&query=Nowacki%2C+F">F. Nowacki</a>, <a href="/search/nucl-ex?searchtype=author&query=Perdikakis%2C+G">G. Perdikakis</a>, <a href="/search/nucl-ex?searchtype=author&query=Recchia%2C+F">F. Recchia</a>, <a href="/search/nucl-ex?searchtype=author&query=Redpath%2C+T">T. Redpath</a>, <a href="/search/nucl-ex?searchtype=author&query=Saenz%2C+S">S. Saenz</a>, <a href="/search/nucl-ex?searchtype=author&query=Smalley%2C+D">D. Smalley</a> , et al. (4 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2202.12820v1-abstract-short" style="display: inline;"> Background: The nucleus $^{32}$Mg ($N=20$ and $Z=12$) plays a central role in the so-called "island of inversion" where in the ground states $sd$-shell neutrons are promoted to the $fp$-shell orbitals across the shell gap, resulting in the disappearance of the canonical neutron magic number $N=20$. Purpose: The primary goals of this work are to extend the level scheme of $^{32}$Mg, provide spin-pa… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2202.12820v1-abstract-full').style.display = 'inline'; document.getElementById('2202.12820v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2202.12820v1-abstract-full" style="display: none;"> Background: The nucleus $^{32}$Mg ($N=20$ and $Z=12$) plays a central role in the so-called "island of inversion" where in the ground states $sd$-shell neutrons are promoted to the $fp$-shell orbitals across the shell gap, resulting in the disappearance of the canonical neutron magic number $N=20$. Purpose: The primary goals of this work are to extend the level scheme of $^{32}$Mg, provide spin-parity assignments to excited states, and discuss the microscopic structure of each state through comparisons with theoretical calculations. Method: In-beam $纬$-ray spectroscopy of $^{32}$Mg was performed using two direct-reaction probes, one-neutron (two-proton) knockout reactions on $^{33}$Mg ($^{34}$Si). Final-state exclusive cross sections and parallel momentum distributions were extracted from the experimental data and compared with eikonal-based reaction model calculations combined with shell-model overlap functions. Results: Owing to the remarkable selectivity of the one-neutron and two-proton knockout reactions, a significantly updated level scheme for $^{32}$Mg, which exhibits negative-parity intruder and positive-parity normal states, was constructed. The experimental results were confronted with four different nuclear structure models. Conclusions: In some of these models, different aspects of $^{32}$Mg and the transition into the island of inversion are well described. However, unexplained discrepancies remain, and even with the help of these state-of-the-art theoretical approaches, the structure of this key nucleus is not yet fully captured. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2202.12820v1-abstract-full').style.display = 'none'; document.getElementById('2202.12820v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 February, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2201.03618">arXiv:2201.03618</a> <span> [<a href="https://arxiv.org/pdf/2201.03618">pdf</a>, <a href="https://arxiv.org/format/2201.03618">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epja/s10050-022-00719-5">10.1140/epja/s10050-022-00719-5 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Weak binding effects on the structure of $^{40}$Mg </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Macchiavelli%2C+A+O">A. O. Macchiavelli</a>, <a href="/search/nucl-ex?searchtype=author&query=Crawford%2C+H+L">H. L. Crawford</a>, <a href="/search/nucl-ex?searchtype=author&query=Fallon%2C+P">P. Fallon</a>, <a href="/search/nucl-ex?searchtype=author&query=Clark%2C+R+M">R. M. Clark</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2201.03618v1-abstract-short" style="display: inline;"> While the phenomenon of one- and two-neutron ground-state halo nuclei is well established, the effects of weak binding on nuclear excitation properties remain largely unexplored. Motivated by this question and by recent data in $^{40}$Mg we investigate the coupling of weakly bound (halo) valence neutrons to a core using the known properties of $^{40}$Mg to explore and illustrate possible particle-… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.03618v1-abstract-full').style.display = 'inline'; document.getElementById('2201.03618v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2201.03618v1-abstract-full" style="display: none;"> While the phenomenon of one- and two-neutron ground-state halo nuclei is well established, the effects of weak binding on nuclear excitation properties remain largely unexplored. Motivated by this question and by recent data in $^{40}$Mg we investigate the coupling of weakly bound (halo) valence neutrons to a core using the known properties of $^{40}$Mg to explore and illustrate possible particle-core coupling schemes and their impact on the low-lying excitation spectrum. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.03618v1-abstract-full').style.display = 'none'; document.getElementById('2201.03618v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 January, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 7 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2201.01513">arXiv:2201.01513</a> <span> [<a href="https://arxiv.org/pdf/2201.01513">pdf</a>, <a href="https://arxiv.org/format/2201.01513">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.129.122501">10.1103/PhysRevLett.129.122501 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The structure of $^{36}$Ca under the Coulomb magnifying glass </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Lalanne%2C+L">L. Lalanne</a>, <a href="/search/nucl-ex?searchtype=author&query=Sorlin%2C+O">O. Sorlin</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Assi%C3%A9%2C+M">M. Assi茅</a>, <a href="/search/nucl-ex?searchtype=author&query=Hammache%2C+F">F. Hammache</a>, <a href="/search/nucl-ex?searchtype=author&query=Koyama%2C+S">S. Koyama</a>, <a href="/search/nucl-ex?searchtype=author&query=Flavigny%2C+F">F. Flavigny</a>, <a href="/search/nucl-ex?searchtype=author&query=Girard-Alcindor%2C+V">V. Girard-Alcindor</a>, <a href="/search/nucl-ex?searchtype=author&query=Lemasson%2C+A">A. Lemasson</a>, <a href="/search/nucl-ex?searchtype=author&query=Matta%2C+A">A. Matta</a>, <a href="/search/nucl-ex?searchtype=author&query=Roger%2C+T">T. Roger</a>, <a href="/search/nucl-ex?searchtype=author&query=Beaumel%2C+D">D. Beaumel</a>, <a href="/search/nucl-ex?searchtype=author&query=Blumenfeld%2C+Y">Y Blumenfeld</a>, <a href="/search/nucl-ex?searchtype=author&query=Brown%2C+B+A">B. A. Brown</a>, <a href="/search/nucl-ex?searchtype=author&query=Santos%2C+F+D+O">F. De Oliveira Santos</a>, <a href="/search/nucl-ex?searchtype=author&query=Delaunay%2C+F">F. Delaunay</a>, <a href="/search/nucl-ex?searchtype=author&query=de+S%C3%A9r%C3%A9ville%2C+N">N. de S茅r茅ville</a>, <a href="/search/nucl-ex?searchtype=author&query=Franchoo%2C+S">S. Franchoo</a>, <a href="/search/nucl-ex?searchtype=author&query=Gibelin%2C+J">J. Gibelin</a>, <a href="/search/nucl-ex?searchtype=author&query=Guillot%2C+J">J. Guillot</a>, <a href="/search/nucl-ex?searchtype=author&query=Kamalou%2C+O">O. Kamalou</a>, <a href="/search/nucl-ex?searchtype=author&query=Kitamura%2C+N">N. Kitamura</a>, <a href="/search/nucl-ex?searchtype=author&query=Lapoux%2C+V">V. Lapoux</a>, <a href="/search/nucl-ex?searchtype=author&query=Mauss%2C+B">B. Mauss</a>, <a href="/search/nucl-ex?searchtype=author&query=Morfouace%2C+P">P. Morfouace</a> , et al. (6 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2201.01513v2-abstract-short" style="display: inline;"> Detailed spectroscopy of the neutron-deficient nucleus $^{36}$Ca was obtained up to 9 MeV using the $^{37}$Ca($p$,$d$)$^{36}$Ca and the $^{38}$Ca($p$,$t$)$^{36}$Ca transfer reactions. The radioactive nuclei, produced by the LISE spectrometer at GANIL, interacted with the protons of the liquid Hydrogen target CRYPTA, to produce light ejectiles (the deuteron $d$ or triton $t$) that were detected in… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.01513v2-abstract-full').style.display = 'inline'; document.getElementById('2201.01513v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2201.01513v2-abstract-full" style="display: none;"> Detailed spectroscopy of the neutron-deficient nucleus $^{36}$Ca was obtained up to 9 MeV using the $^{37}$Ca($p$,$d$)$^{36}$Ca and the $^{38}$Ca($p$,$t$)$^{36}$Ca transfer reactions. The radioactive nuclei, produced by the LISE spectrometer at GANIL, interacted with the protons of the liquid Hydrogen target CRYPTA, to produce light ejectiles (the deuteron $d$ or triton $t$) that were detected in the MUST2 detector array, in coincidence with the heavy residues %identified by a zero degree detection system. %States have been measured up to 9 MeV. Our main findings are: i) a similar shift in energy for the 1$^+_1$ and 2$^+_1$ states by about -250 keV, as compared to the mirror nucleus $^{36}$S, ii) the discovery of an intruder 0$^+_2$ state at 2.83(13) MeV, which appears below the first 2$^+$ state, in contradiction with the situation in $^{36}$S, and iii) a tentative 0$^+_3$ state at 4.83(17) MeV, proposed to exhibit a bubble structure with two neutron vacancies in the 2s$_{1/2}$ orbit. The inversion between the 0$^+_2$ and 2$^+_1$ states is due to the large mirror energy difference (MED) of -516(130) keV for the former. This feature is reproduced by Shell Model (SM) calculations, using the $sd$-$pf$ valence space, predicting an almost pure intruder nature for the 0$^+_2$ state, with two protons (neutrons) being excited across the $Z$=20 magic closure in $^{36}$Ca ($^{36}$S). This mirror system has the largest MEDs ever observed, if one excludes the few cases induced by the effect of the continuum. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.01513v2-abstract-full').style.display = 'none'; document.getElementById('2201.01513v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 August, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 January, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Paper of 5 pages, 3 figures. Contains also a supplementary material of 3 pages and 4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2109.12090">arXiv:2109.12090</a> <span> [<a href="https://arxiv.org/pdf/2109.12090">pdf</a>, <a href="https://arxiv.org/format/2109.12090">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2021.136682">10.1016/j.physletb.2021.136682 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Coexisting normal and intruder configurations in $^{32}$Mg </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Kitamura%2C+N">N. Kitamura</a>, <a href="/search/nucl-ex?searchtype=author&query=Wimmer%2C+K">K. Wimmer</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Shimizu%2C+N">N. Shimizu</a>, <a href="/search/nucl-ex?searchtype=author&query=Tostevin%2C+J+A">J. A. Tostevin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bader%2C+V+M">V. M. Bader</a>, <a href="/search/nucl-ex?searchtype=author&query=Bancroft%2C+C">C. Bancroft</a>, <a href="/search/nucl-ex?searchtype=author&query=Barofsky%2C+D">D. Barofsky</a>, <a href="/search/nucl-ex?searchtype=author&query=Baugher%2C+T">T. Baugher</a>, <a href="/search/nucl-ex?searchtype=author&query=Bazin%2C+D">D. Bazin</a>, <a href="/search/nucl-ex?searchtype=author&query=Berryman%2C+J+S">J. S. Berryman</a>, <a href="/search/nucl-ex?searchtype=author&query=Bildstein%2C+V">V. Bildstein</a>, <a href="/search/nucl-ex?searchtype=author&query=Gade%2C+A">A. Gade</a>, <a href="/search/nucl-ex?searchtype=author&query=Imai%2C+N">N. Imai</a>, <a href="/search/nucl-ex?searchtype=author&query=Kr%C3%B6ll%2C+T">T. Kr枚ll</a>, <a href="/search/nucl-ex?searchtype=author&query=Langer%2C+C">C. Langer</a>, <a href="/search/nucl-ex?searchtype=author&query=Lloyd%2C+J">J. Lloyd</a>, <a href="/search/nucl-ex?searchtype=author&query=Lunderberg%2C+E">E. Lunderberg</a>, <a href="/search/nucl-ex?searchtype=author&query=Nowacki%2C+F">F. Nowacki</a>, <a href="/search/nucl-ex?searchtype=author&query=Perdikakis%2C+G">G. Perdikakis</a>, <a href="/search/nucl-ex?searchtype=author&query=Recchia%2C+F">F. Recchia</a>, <a href="/search/nucl-ex?searchtype=author&query=Redpath%2C+T">T. Redpath</a>, <a href="/search/nucl-ex?searchtype=author&query=Saenz%2C+S">S. Saenz</a>, <a href="/search/nucl-ex?searchtype=author&query=Smalley%2C+D">D. Smalley</a>, <a href="/search/nucl-ex?searchtype=author&query=Stroberg%2C+S+R">S. R. Stroberg</a> , et al. (3 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2109.12090v1-abstract-short" style="display: inline;"> Situated in the so-called "island of inversion," the nucleus $^{32}$Mg is considered as an archetypal example of the disappearance of magicity at $N=20$. We report on high statistics in-beam spectroscopy of $^{32}$Mg with a unique approach, in that two direct reaction probes with different sensitivities to the underlying nuclear structure are employed at the same time. More specifically, states in… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.12090v1-abstract-full').style.display = 'inline'; document.getElementById('2109.12090v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2109.12090v1-abstract-full" style="display: none;"> Situated in the so-called "island of inversion," the nucleus $^{32}$Mg is considered as an archetypal example of the disappearance of magicity at $N=20$. We report on high statistics in-beam spectroscopy of $^{32}$Mg with a unique approach, in that two direct reaction probes with different sensitivities to the underlying nuclear structure are employed at the same time. More specifically, states in $^{32}$Mg were populated by knockout reactions starting from $^{33}$Mg and $^{34}$Si, lying inside and outside the island of inversion, respectively. The momentum distributions of the reaction residues and the cross sections leading to the individual final states were confronted with eikonal-based reaction calculations, yielding a significantly updated level scheme for $^{32}$Mg and spin-parity assignments. By fully exploiting observables obtained in this measurement, a variety of structures coexisting in 32Mg was unraveled. Comparisons with theoretical predictions based on shell-model overlaps allowed for clear discrimination between different structural models, revealing that the complete theoretical description of this key nucleus is yet to be achieved. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.12090v1-abstract-full').style.display = 'none'; document.getElementById('2109.12090v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2108.07360">arXiv:2108.07360</a> <span> [<a href="https://arxiv.org/pdf/2108.07360">pdf</a>, <a href="https://arxiv.org/format/2108.07360">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.105.014309">10.1103/PhysRevC.105.014309 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Structure of $^{43}$P and $^{42}$Si in a two-level shape-coexistence model </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Macchiavelli%2C+A+O">A. O. Macchiavelli</a>, <a href="/search/nucl-ex?searchtype=author&query=Crawford%2C+H+L">H. L. Crawford</a>, <a href="/search/nucl-ex?searchtype=author&query=Campbell%2C+C+M">C. M. Campbell</a>, <a href="/search/nucl-ex?searchtype=author&query=Clark%2C+R+M">R. M. Clark</a>, <a href="/search/nucl-ex?searchtype=author&query=Cromaz%2C+M">M. Cromaz</a>, <a href="/search/nucl-ex?searchtype=author&query=Fallon%2C+P">P. Fallon</a>, <a href="/search/nucl-ex?searchtype=author&query=Lee%2C+I+Y">I. Y. Lee</a>, <a href="/search/nucl-ex?searchtype=author&query=Gade%2C+A">A. Gade</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Rice%2C+E">E. Rice</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2108.07360v1-abstract-short" style="display: inline;"> Exclusive cross sections for the $^{43}$P$(-1p)^{42}$Si reaction to the lowest $0^+$ and $2^+$ states, measured at NSCL with GRETINA and the S800, are interpreted in terms of a two-level mixing (collective) model of oblate and prolate co-existing shapes. Using the formalism developed for deformed nuclei we calculate the spectroscopic amplitudes and exclusive cross-sections in the strong coupling l… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2108.07360v1-abstract-full').style.display = 'inline'; document.getElementById('2108.07360v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2108.07360v1-abstract-full" style="display: none;"> Exclusive cross sections for the $^{43}$P$(-1p)^{42}$Si reaction to the lowest $0^+$ and $2^+$ states, measured at NSCL with GRETINA and the S800, are interpreted in terms of a two-level mixing (collective) model of oblate and prolate co-existing shapes. Using the formalism developed for deformed nuclei we calculate the spectroscopic amplitudes and exclusive cross-sections in the strong coupling limit, where for $^{43}$P the schematic wavefunction includes the coupling of the Nilsson [211]$\frac{1}{2}$ proton orbit. Good agreement with the experimental data is obtained when the amplitude of the oblate configuration is $\gtrsim$ 80\%, suggesting that both nuclei are predominantly oblate, in line with theoretical expectations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2108.07360v1-abstract-full').style.display = 'none'; document.getElementById('2108.07360v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 August, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 3 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2107.04317">arXiv:2107.04317</a> <span> [<a href="https://arxiv.org/pdf/2107.04317">pdf</a>, <a href="https://arxiv.org/format/2107.04317">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.103.055809">10.1103/PhysRevC.103.055809 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Evaluation of the $^{35}$K($p$,$纬$)$^{36}$Ca reaction rate using the $^{37}$Ca($p$,$d$)$^{36}$Ca transfer reaction </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Lalanne%2C+L">L. Lalanne</a>, <a href="/search/nucl-ex?searchtype=author&query=Sorlin%2C+O">O. Sorlin</a>, <a href="/search/nucl-ex?searchtype=author&query=Assi%C3%A9%2C+M">M. Assi茅</a>, <a href="/search/nucl-ex?searchtype=author&query=Hammache%2C+F">F. Hammache</a>, <a href="/search/nucl-ex?searchtype=author&query=de+S%C3%A9r%C3%A9ville%2C+N">N. de S茅r茅ville</a>, <a href="/search/nucl-ex?searchtype=author&query=Koyama%2C+S">S. Koyama</a>, <a href="/search/nucl-ex?searchtype=author&query=Suzuki%2C+D">D. Suzuki</a>, <a href="/search/nucl-ex?searchtype=author&query=Flavigny%2C+F">F. Flavigny</a>, <a href="/search/nucl-ex?searchtype=author&query=Beaumel%2C+D">D. Beaumel</a>, <a href="/search/nucl-ex?searchtype=author&query=Blumenfeld%2C+Y">Y Blumenfeld</a>, <a href="/search/nucl-ex?searchtype=author&query=Brown%2C+B+A">B. A. Brown</a>, <a href="/search/nucl-ex?searchtype=author&query=Santos%2C+F+D+O">F. De Oliveira Santos</a>, <a href="/search/nucl-ex?searchtype=author&query=Delaunay%2C+F">F. Delaunay</a>, <a href="/search/nucl-ex?searchtype=author&query=Franchoo%2C+S">S. Franchoo</a>, <a href="/search/nucl-ex?searchtype=author&query=Gibelin%2C+J">J. Gibelin</a>, <a href="/search/nucl-ex?searchtype=author&query=Girard-Alcindor%2C+V">V. Girard-Alcindor</a>, <a href="/search/nucl-ex?searchtype=author&query=Guillot%2C+J">J. Guillot</a>, <a href="/search/nucl-ex?searchtype=author&query=Kamalou%2C+O">O. Kamalou</a>, <a href="/search/nucl-ex?searchtype=author&query=Kitamura%2C+N">N. Kitamura</a>, <a href="/search/nucl-ex?searchtype=author&query=Lapoux%2C+V">V. Lapoux</a>, <a href="/search/nucl-ex?searchtype=author&query=Lemasson%2C+A">A. Lemasson</a>, <a href="/search/nucl-ex?searchtype=author&query=Matta%2C+A">A. Matta</a>, <a href="/search/nucl-ex?searchtype=author&query=Mauss%2C+B">B. Mauss</a>, <a href="/search/nucl-ex?searchtype=author&query=Morfouace%2C+P">P. Morfouace</a>, <a href="/search/nucl-ex?searchtype=author&query=Niikura%2C+M">M. Niikura</a> , et al. (6 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2107.04317v1-abstract-short" style="display: inline;"> A recent sensitivity study has shown that the $^{35}$K$(p,纬)^{36}$Ca reaction is one of the ten $(p,纬)$ reaction rates that could significantly impact the shape of the calculated X-ray burst light curve. In this work, we propose to reinvestigate the $^{35}$K$(p,纬)^{36}$Ca reaction rate, as well as related uncertainties, by determining the energies and decay branching ratios of $^{36}$Ca levels, wi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.04317v1-abstract-full').style.display = 'inline'; document.getElementById('2107.04317v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2107.04317v1-abstract-full" style="display: none;"> A recent sensitivity study has shown that the $^{35}$K$(p,纬)^{36}$Ca reaction is one of the ten $(p,纬)$ reaction rates that could significantly impact the shape of the calculated X-ray burst light curve. In this work, we propose to reinvestigate the $^{35}$K$(p,纬)^{36}$Ca reaction rate, as well as related uncertainties, by determining the energies and decay branching ratios of $^{36}$Ca levels, within the Gamow window, in the 0.5 to 2 GK X-ray burst temperature range. These properties were studied using the one neutron pick-up transfer reaction $^{37}$Ca$(p,d)^{36}$Ca in inverse kinematics using a radioactive beam of $^{37}$Ca at 48 MeV nucleon$^{-1}$. The experiment performed at GANIL, used the liquid Hydrogen target CRYPTA, the MUST2 detector array for the detection of the light charged particles and a zero degree detection system for the outgoing heavy ions. The atomic mass of $^{36}$Ca is confirmed and new resonances have been proposed together with their proton decay branching ratios. This spectroscopic information, used in combination with recent theoretical predictions for the $纬$-width, were used to calculate the $^{35}$K$(p,纬)^{36}$Ca reaction rate. The recommended rate of the present work was obtain within a uncertainty factor of 2 at 1 sigma. This is consistent, with the previous estimate in the X-ray burst temperature range. A large increase of the reaction rate was found at higher temperatures due to two newly discovered resonances. The $^{35}$K$(p,纬)^{36}$Ca thermonuclear reaction rate is now well constrained by the present work in a broad range of temperatures. Our results show that the $^{35}$K$(p,纬)^{36}$Ca reaction does not affect the shape of the X-ray burst light curve, and that it can be removed from the list of the few influential proton radiative captures reactions having a strong impact on the light curve. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.04317v1-abstract-full').style.display = 'none'; document.getElementById('2107.04317v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 July, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Published 13 May 2021 in PRC</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 103, 055809 , 2021 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2106.10269">arXiv:2106.10269</a> <span> [<a href="https://arxiv.org/pdf/2106.10269">pdf</a>, <a href="https://arxiv.org/format/2106.10269">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.104.L031306">10.1103/PhysRevC.104.L031306 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Shell model analysis of the $ B(E2,2^+ \rightarrow 0^+)$'s in the A=70 T=1 triplet </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Lenzi%2C+S+M">S. M. Lenzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Macchiavelli%2C+A+O">A. O. Macchiavelli</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2106.10269v1-abstract-short" style="display: inline;"> he $B(E2,2^+ \rightarrow 0^+)$ transition strengths of the T=1 isobaric triplet $^{70}$Kr, $^{70}$Br, $^{70}$Se, recently measured at RIKEN/RIBF, are discussed in terms of state of the art large scale shell model calculations using the JUN45 and JUN45+LNPS plus Coulomb interactions. In this letter we argue that, depending on the effective charges used, the calculations are either in line with the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2106.10269v1-abstract-full').style.display = 'inline'; document.getElementById('2106.10269v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2106.10269v1-abstract-full" style="display: none;"> he $B(E2,2^+ \rightarrow 0^+)$ transition strengths of the T=1 isobaric triplet $^{70}$Kr, $^{70}$Br, $^{70}$Se, recently measured at RIKEN/RIBF, are discussed in terms of state of the art large scale shell model calculations using the JUN45 and JUN45+LNPS plus Coulomb interactions. In this letter we argue that, depending on the effective charges used, the calculations are either in line with the experimental data within statistical uncertainties, or the anomaly happens in $^{70}$Br, rather than $^{70}$Kr. In the latter case, we suggest that it can be due to the presence of a hitherto undetected 1$^+$ T=0 state below the yrast 2$^+$ T=1 state. Our results do not support a shape change of $^{70}$Kr with respect to the other members of the isobaric multiplet. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2106.10269v1-abstract-full').style.display = 'none'; document.getElementById('2106.10269v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 June, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">4 pages, 3 figures. To be submitted to Phys. Rev. C</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 104, 031306 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2101.06246">arXiv:2101.06246</a> <span> [<a href="https://arxiv.org/pdf/2101.06246">pdf</a>, <a href="https://arxiv.org/ps/2101.06246">ps</a>, <a href="https://arxiv.org/format/2101.06246">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.103.064328">10.1103/PhysRevC.103.064328 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Persistence of the ${Z=28}$ shell gap in ${A=75}$ isobars: Identification of a possible ${(1/2^-)}$ $渭$s isomer in ${^{75}}$Co and $尾$ decay to ${^{75}}$Ni </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Escrig%2C+S">S. Escrig</a>, <a href="/search/nucl-ex?searchtype=author&query=Morales%2C+A+I">A. I. Morales</a>, <a href="/search/nucl-ex?searchtype=author&query=Nishimura%2C+S">S. Nishimura</a>, <a href="/search/nucl-ex?searchtype=author&query=Niikura%2C+M">M. Niikura</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Xu%2C+Z+Y">Z. Y. Xu</a>, <a href="/search/nucl-ex?searchtype=author&query=Lorusso%2C+G">G. Lorusso</a>, <a href="/search/nucl-ex?searchtype=author&query=Browne%2C+F">F. Browne</a>, <a href="/search/nucl-ex?searchtype=author&query=Doornenbal%2C+P">P. Doornenbal</a>, <a href="/search/nucl-ex?searchtype=author&query=Gey%2C+G">G. Gey</a>, <a href="/search/nucl-ex?searchtype=author&query=Jung%2C+H+-">H. -S. Jung</a>, <a href="/search/nucl-ex?searchtype=author&query=Li%2C+Z">Z. Li</a>, <a href="/search/nucl-ex?searchtype=author&query=S%C3%B6derstr%C3%B6m%2C+P+-">P. -A. S枚derstr枚m</a>, <a href="/search/nucl-ex?searchtype=author&query=Sumikama%2C+T">T. Sumikama</a>, <a href="/search/nucl-ex?searchtype=author&query=Taprogge%2C+J">J. Taprogge</a>, <a href="/search/nucl-ex?searchtype=author&query=Vajta%2C+Z">Zs. Vajta</a>, <a href="/search/nucl-ex?searchtype=author&query=Watanabe%2C+H">H. Watanabe</a>, <a href="/search/nucl-ex?searchtype=author&query=Wu%2C+J">J. Wu</a>, <a href="/search/nucl-ex?searchtype=author&query=Yagi%2C+A">A. Yagi</a>, <a href="/search/nucl-ex?searchtype=author&query=Yoshinaga%2C+K">K. Yoshinaga</a>, <a href="/search/nucl-ex?searchtype=author&query=Baba%2C+H">H. Baba</a>, <a href="/search/nucl-ex?searchtype=author&query=Franchoo%2C+S">S. Franchoo</a>, <a href="/search/nucl-ex?searchtype=author&query=Isobe%2C+T">T. Isobe</a>, <a href="/search/nucl-ex?searchtype=author&query=John%2C+P+R">P. R. John</a>, <a href="/search/nucl-ex?searchtype=author&query=Kojouharov%2C+I">I. Kojouharov</a> , et al. (18 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2101.06246v2-abstract-short" style="display: inline;"> Background: The evolution of shell structure around doubly magic exotic nuclei is of great interest in nuclear physics and astrophysics. In the `southwest' region of $^{78}$Ni, the development of deformation might trigger a major shift in our understanding of explosive nucleosynthesis. To this end, new spectroscopic information on key close-lying nuclei is very valuable. Purpose: We intend to me… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.06246v2-abstract-full').style.display = 'inline'; document.getElementById('2101.06246v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2101.06246v2-abstract-full" style="display: none;"> Background: The evolution of shell structure around doubly magic exotic nuclei is of great interest in nuclear physics and astrophysics. In the `southwest' region of $^{78}$Ni, the development of deformation might trigger a major shift in our understanding of explosive nucleosynthesis. To this end, new spectroscopic information on key close-lying nuclei is very valuable. Purpose: We intend to measure the isomeric and $尾$ decay of $^{75}$Co, with one-proton and two-neutron holes relative to $^{78}$Ni, to access new nuclear structure information in $^{75}$Co and its $尾$-decay daughters $^{75}$Ni and $^{74}$Ni. Methods: The nucleus $^{75}$Co is produced in relativistic in-flight fission reactions of $^{238}$U at the Radioactive Ion Beam Factory in the RIKEN Nishina Center. Its isomeric and $尾$ decay are studied exploiting the BigRIPS and EURICA setups. Results: We obtain partial $尾$-decay spectra for $^{75}$Ni and $^{74}$Ni, and report a new isomeric transition in $^{75}$Co. The energy [$E_纬=1914(2)$ keV] and half-life [$t_{1/2}=13(6)$ $渭$s] of the delayed $纬$ ray lend support for the existence of a $J^蟺=(1/2^-)$ isomeric state at 1914(2) keV. A comparison with PFSDG-U shell-model calculations provides a good account for the observed states in $^{75}$Ni, but the first calculated $1/2^-$ level in $^{75}$Co, a prolate $K=1/2$ state, is predicted about 1 MeV below the observed $(1/2^-)$ level. Conclusions: The spherical-like structure of the lowest-lying excited states in $^{75}$Ni is proved. In the case of $^{75}$Co, the results suggest that the dominance of the spherical configurations over the deformed ones might be stronger than expected below $^{78}$Ni. Further experimental efforts to discern the nature of the $J^蟺=(1/2^-)$ isomer are necessary. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.06246v2-abstract-full').style.display = 'none'; document.getElementById('2101.06246v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 June, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 15 January, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">15 pages, 6 figures, 3 tables. Physical Review C</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 103, 064328 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2010.12793">arXiv:2010.12793</a> <span> [<a href="https://arxiv.org/pdf/2010.12793">pdf</a>, <a href="https://arxiv.org/format/2010.12793">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.125.172501">10.1103/PhysRevLett.125.172501 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Absence of Low-Energy Shape Coexistence in $^{80}$Ge: The Nonobservation of a Proposed Excited 0$_2^+$ Level at 639 keV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Garcia%2C+F+H">F. H. Garcia</a>, <a href="/search/nucl-ex?searchtype=author&query=Andreoiu%2C+C">C. Andreoiu</a>, <a href="/search/nucl-ex?searchtype=author&query=Ball%2C+G+C">G. C. Ball</a>, <a href="/search/nucl-ex?searchtype=author&query=Bell%2C+A">A. Bell</a>, <a href="/search/nucl-ex?searchtype=author&query=Garnsworthy%2C+A+B">A. B. Garnsworthy</a>, <a href="/search/nucl-ex?searchtype=author&query=Nowacki%2C+F">F. Nowacki</a>, <a href="/search/nucl-ex?searchtype=author&query=Petrache%2C+C+M">C. M. Petrache</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Whitmore%2C+K">K. Whitmore</a>, <a href="/search/nucl-ex?searchtype=author&query=Ali%2C+F+A">F. A. Ali</a>, <a href="/search/nucl-ex?searchtype=author&query=Bernier%2C+N">N. Bernier</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhattacharjee%2C+S+S">S. S. Bhattacharjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Bowry%2C+M">M. Bowry</a>, <a href="/search/nucl-ex?searchtype=author&query=Coleman%2C+R+J">R. J. Coleman</a>, <a href="/search/nucl-ex?searchtype=author&query=Dillmann%2C+I">I. Dillmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Djianto%2C+I">I. Djianto</a>, <a href="/search/nucl-ex?searchtype=author&query=Forney%2C+A+M">A. M. Forney</a>, <a href="/search/nucl-ex?searchtype=author&query=Gascoine%2C+M">M. Gascoine</a>, <a href="/search/nucl-ex?searchtype=author&query=Hackman%2C+G">G. Hackman</a>, <a href="/search/nucl-ex?searchtype=author&query=Leach%2C+K+G">K. G. Leach</a>, <a href="/search/nucl-ex?searchtype=author&query=Murphy%2C+A+N">A. N. Murphy</a>, <a href="/search/nucl-ex?searchtype=author&query=Natzke%2C+C+R">C. R. Natzke</a>, <a href="/search/nucl-ex?searchtype=author&query=Olaizola%2C+B">B. Olaizola</a>, <a href="/search/nucl-ex?searchtype=author&query=Ortner%2C+K">K. Ortner</a>, <a href="/search/nucl-ex?searchtype=author&query=Peters%2C+E+E">E. E. Peters</a> , et al. (6 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2010.12793v1-abstract-short" style="display: inline;"> The $^{80}$Ge structure was investigated in a high-statistics $尾$-decay experiment of $^{80}$Ga using the GRIFFIN spectrometer at TRIUMF-ISAC through $纬$, $尾$-$e$, $e$-$纬$ and $纬$-$纬$ spectroscopy. No evidence was found for the recently reported 0$_2^{+}$ 639-keV level suggested as evidence for low-energy shape coexistence in $^{80}$Ge. Large-scale shell model calculations performed in… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.12793v1-abstract-full').style.display = 'inline'; document.getElementById('2010.12793v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2010.12793v1-abstract-full" style="display: none;"> The $^{80}$Ge structure was investigated in a high-statistics $尾$-decay experiment of $^{80}$Ga using the GRIFFIN spectrometer at TRIUMF-ISAC through $纬$, $尾$-$e$, $e$-$纬$ and $纬$-$纬$ spectroscopy. No evidence was found for the recently reported 0$_2^{+}$ 639-keV level suggested as evidence for low-energy shape coexistence in $^{80}$Ge. Large-scale shell model calculations performed in $^{78,80,82}$Ge place the $0^{+}_{2}$ level in $^{80}$Ge at 2\,MeV. The new experimental evidence combined with shell model predictions indicate that low-energy shape coexistence is not present in $^{80}$Ge. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.12793v1-abstract-full').style.display = 'none'; document.getElementById('2010.12793v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 October, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 125, 172501 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2007.01934">arXiv:2007.01934</a> <span> [<a href="https://arxiv.org/pdf/2007.01934">pdf</a>, <a href="https://arxiv.org/format/2007.01934">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.102.031302">10.1103/PhysRevC.102.031302 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Isospin symmetry breaking in the mirror pair $^{73}$Sr-$^{73}$Br </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Lenzi%2C+S+M">S. M. Lenzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Macchiavelli%2C+A+O">A. O. Macchiavelli</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2007.01934v2-abstract-short" style="display: inline;"> The recent experimental observation of isospin symmetry breaking (ISB) in the ground states of the $T=3/2$ mirror pair $^{73}$Sr - $^{73}$Br is theoretically studied using large-scale shell model calculations. The large valence space and the successful PFSDG-U effective interaction used for the nuclear part of the problem capture possible structural changes and provide a robust basis to treat the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.01934v2-abstract-full').style.display = 'inline'; document.getElementById('2007.01934v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2007.01934v2-abstract-full" style="display: none;"> The recent experimental observation of isospin symmetry breaking (ISB) in the ground states of the $T=3/2$ mirror pair $^{73}$Sr - $^{73}$Br is theoretically studied using large-scale shell model calculations. The large valence space and the successful PFSDG-U effective interaction used for the nuclear part of the problem capture possible structural changes and provide a robust basis to treat the ISB effects of both electromagnetic and non-electromagnetic origin. The calculated shifts and mirror-energy-differences are consistent with the inversion of the $I^蟺$= 1/2$^{-}, 5/2^{-}$ states between $^{73}$Sr - $^{73}$Br, and suggest that the role played by the Coulomb interaction is dominant. An isospin breaking contribution of nuclear origin is estimated to be $\approx 25$ keV. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.01934v2-abstract-full').style.display = 'none'; document.getElementById('2007.01934v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 July, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 3 July, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">4 pages, 4 tables, 1 figure. Submitted to Physical Review C</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 102, 031302 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1912.07887">arXiv:1912.07887</a> <span> [<a href="https://arxiv.org/pdf/1912.07887">pdf</a>, <a href="https://arxiv.org/ps/1912.07887">ps</a>, <a href="https://arxiv.org/format/1912.07887">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2019.135071">10.1016/j.physletb.2019.135071 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Shell evolution of $N=40$ isotones towards $^{60}$Ca: First spectroscopy of $^{62}$Ti </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Cort%C3%A9s%2C+M+L">M. L. Cort茅s</a>, <a href="/search/nucl-ex?searchtype=author&query=Rodriguez%2C+W">W. Rodriguez</a>, <a href="/search/nucl-ex?searchtype=author&query=Doornenbal%2C+P">P. Doornenbal</a>, <a href="/search/nucl-ex?searchtype=author&query=Obertelli%2C+A">A. Obertelli</a>, <a href="/search/nucl-ex?searchtype=author&query=Holt%2C+J+D">J. D. Holt</a>, <a href="/search/nucl-ex?searchtype=author&query=Lenzi%2C+S+M">S. M. Lenzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Men%C3%A9ndez%2C+J">J. Men茅ndez</a>, <a href="/search/nucl-ex?searchtype=author&query=Nowacki%2C+F">F. Nowacki</a>, <a href="/search/nucl-ex?searchtype=author&query=Ogata%2C+K">K. Ogata</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Rodr%C3%ADguez%2C+T+R">T. R. Rodr铆guez</a>, <a href="/search/nucl-ex?searchtype=author&query=Schwenk%2C+A">A. Schwenk</a>, <a href="/search/nucl-ex?searchtype=author&query=Simonis%2C+J">J. Simonis</a>, <a href="/search/nucl-ex?searchtype=author&query=Stroberg%2C+S+R">S. R. Stroberg</a>, <a href="/search/nucl-ex?searchtype=author&query=Yoshida%2C+K">K. Yoshida</a>, <a href="/search/nucl-ex?searchtype=author&query=Achouri%2C+L">L. Achouri</a>, <a href="/search/nucl-ex?searchtype=author&query=Baba%2C+H">H. Baba</a>, <a href="/search/nucl-ex?searchtype=author&query=Browne%2C+F">F. Browne</a>, <a href="/search/nucl-ex?searchtype=author&query=Calvet%2C+D">D. Calvet</a>, <a href="/search/nucl-ex?searchtype=author&query=Ch%C3%A2teau%2C+F">F. Ch芒teau</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+S">S. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chiga%2C+N">N. Chiga</a>, <a href="/search/nucl-ex?searchtype=author&query=Corsi%2C+A">A. Corsi</a>, <a href="/search/nucl-ex?searchtype=author&query=Delbart%2C+A">A. Delbart</a>, <a href="/search/nucl-ex?searchtype=author&query=Gheller%2C+J">J-M. Gheller</a> , et al. (59 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1912.07887v1-abstract-short" style="display: inline;"> Excited states in the $N=40$ isotone $^{62}$Ti were populated via the $^{63}$V$(p,2p)$$^{62}$Ti reaction at $\sim$200~MeV/u at the Radioactive Isotope Beam Factory and studied using $纬$-ray spectroscopy. The energies of the $2^+_1 \rightarrow 0^{+}_{\mathrm{gs}}$ and $4^+_1 \rightarrow 2^+_1$ transitions, observed here for the first time, indicate a deformed $^{62}$Ti ground state. These energies… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.07887v1-abstract-full').style.display = 'inline'; document.getElementById('1912.07887v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1912.07887v1-abstract-full" style="display: none;"> Excited states in the $N=40$ isotone $^{62}$Ti were populated via the $^{63}$V$(p,2p)$$^{62}$Ti reaction at $\sim$200~MeV/u at the Radioactive Isotope Beam Factory and studied using $纬$-ray spectroscopy. The energies of the $2^+_1 \rightarrow 0^{+}_{\mathrm{gs}}$ and $4^+_1 \rightarrow 2^+_1$ transitions, observed here for the first time, indicate a deformed $^{62}$Ti ground state. These energies are increased compared to the neighboring $^{64}$Cr and $^{66}$Fe isotones, suggesting a small decrease of quadrupole collectivity. The present measurement is well reproduced by large-scale shell-model calculations based on effective interactions, while ab initio and beyond mean-field calculations do not yet reproduce our findings. The shell-model calculations for $^{62}$Ti show a dominant configuration with four neutrons excited across the $N=40$ gap. Likewise, they indicate that the $N=40$ island of inversion extends down to $Z=20$, disfavoring a possible doubly magic character of the elusive $^{60}$Ca. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.07887v1-abstract-full').style.display = 'none'; document.getElementById('1912.07887v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 December, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Physics Letters B, 800, 135071 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1912.05978">arXiv:1912.05978</a> <span> [<a href="https://arxiv.org/pdf/1912.05978">pdf</a>, <a href="https://arxiv.org/format/1912.05978">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41586-019-1155-x">10.1038/s41586-019-1155-x <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> $^{78}$Ni revealed as a doubly magic stronghold against nuclear deformation </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Taniuchi%2C+R">R. Taniuchi</a>, <a href="/search/nucl-ex?searchtype=author&query=Santamaria%2C+C">C. Santamaria</a>, <a href="/search/nucl-ex?searchtype=author&query=Doornenbal%2C+P">P. Doornenbal</a>, <a href="/search/nucl-ex?searchtype=author&query=Obertelli%2C+A">A. Obertelli</a>, <a href="/search/nucl-ex?searchtype=author&query=Yoneda%2C+K">K. Yoneda</a>, <a href="/search/nucl-ex?searchtype=author&query=Authelet%2C+G">G. Authelet</a>, <a href="/search/nucl-ex?searchtype=author&query=Baba%2C+H">H. Baba</a>, <a href="/search/nucl-ex?searchtype=author&query=Calvet%2C+D">D. Calvet</a>, <a href="/search/nucl-ex?searchtype=author&query=Ch%C3%A2teau%2C+F">F. Ch芒teau</a>, <a href="/search/nucl-ex?searchtype=author&query=Corsi%2C+A">A. Corsi</a>, <a href="/search/nucl-ex?searchtype=author&query=Delbart%2C+A">A. Delbart</a>, <a href="/search/nucl-ex?searchtype=author&query=Gheller%2C+J+-">J. -M. Gheller</a>, <a href="/search/nucl-ex?searchtype=author&query=Gillibert%2C+A">A. Gillibert</a>, <a href="/search/nucl-ex?searchtype=author&query=Holt%2C+J+D">J. D. Holt</a>, <a href="/search/nucl-ex?searchtype=author&query=Isobe%2C+T">T. Isobe</a>, <a href="/search/nucl-ex?searchtype=author&query=Lapoux%2C+V">V. Lapoux</a>, <a href="/search/nucl-ex?searchtype=author&query=Matsushita%2C+M">M. Matsushita</a>, <a href="/search/nucl-ex?searchtype=author&query=Men%C3%A9ndez%2C+J">J. Men茅ndez</a>, <a href="/search/nucl-ex?searchtype=author&query=Momiyama%2C+S">S. Momiyama</a>, <a href="/search/nucl-ex?searchtype=author&query=Motobayashi%2C+T">T. Motobayashi</a>, <a href="/search/nucl-ex?searchtype=author&query=Niikura%2C+M">M. Niikura</a>, <a href="/search/nucl-ex?searchtype=author&query=Nowacki%2C+F">F. Nowacki</a>, <a href="/search/nucl-ex?searchtype=author&query=Ogata%2C+K">K. Ogata</a>, <a href="/search/nucl-ex?searchtype=author&query=Otsu%2C+H">H. Otsu</a>, <a href="/search/nucl-ex?searchtype=author&query=Otsuka%2C+T">T. Otsuka</a> , et al. (46 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1912.05978v1-abstract-short" style="display: inline;"> Nuclear magic numbers, which emerge from the strong nuclear force based on quantum chromodynamics, correspond to fully occupied energy shells of protons, or neutrons inside atomic nuclei. Doubly magic nuclei, with magic numbers for both protons and neutrons, are spherical and extremely rare across the nuclear landscape. While the sequence of magic numbers is well established for stable nuclei, evi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.05978v1-abstract-full').style.display = 'inline'; document.getElementById('1912.05978v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1912.05978v1-abstract-full" style="display: none;"> Nuclear magic numbers, which emerge from the strong nuclear force based on quantum chromodynamics, correspond to fully occupied energy shells of protons, or neutrons inside atomic nuclei. Doubly magic nuclei, with magic numbers for both protons and neutrons, are spherical and extremely rare across the nuclear landscape. While the sequence of magic numbers is well established for stable nuclei, evidence reveals modifications for nuclei with a large proton-to-neutron asymmetry. Here, we provide the first spectroscopic study of the doubly magic nucleus $^{78}$Ni, fourteen neutrons beyond the last stable nickel isotope. We provide direct evidence for its doubly magic nature, which is also predicted by ab initio calculations based on chiral effective field theory interactions and the quasi-particle random-phase approximation. However, our results also provide the first indication of the breakdown of the neutron magic number 50 and proton magic number 28 beyond this stronghold, caused by a competing deformed structure. State-of-the-art phenomenological shell-model calculations reproduce this shape coexistence, predicting further a rapid transition from spherical to deformed ground states with $^{78}$Ni as turning point. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.05978v1-abstract-full').style.display = 'none'; document.getElementById('1912.05978v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 December, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature 569, 53-58 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1908.11626">arXiv:1908.11626</a> <span> [<a href="https://arxiv.org/pdf/1908.11626">pdf</a>, <a href="https://arxiv.org/format/1908.11626">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.100.034306">10.1103/PhysRevC.100.034306 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Normal and intruder configurations in $^{34}$Si populated in the $尾^-$ decay of $^{34}$Mg and $^{34}$Al </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Lica%2C+R">R. Lica</a>, <a href="/search/nucl-ex?searchtype=author&query=Rotaru%2C+F">F. Rotaru</a>, <a href="/search/nucl-ex?searchtype=author&query=Borge%2C+M+J+G">M. J. G. Borge</a>, <a href="/search/nucl-ex?searchtype=author&query=Grevy%2C+S">S. Grevy</a>, <a href="/search/nucl-ex?searchtype=author&query=Negoita%2C+F">F. Negoita</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Sorlin%2C+O">O. Sorlin</a>, <a href="/search/nucl-ex?searchtype=author&query=Andreyev%2C+A+N">A. N. Andreyev</a>, <a href="/search/nucl-ex?searchtype=author&query=Borcea%2C+R">R. Borcea</a>, <a href="/search/nucl-ex?searchtype=author&query=Costache%2C+C">C. Costache</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Witte%2C+H">H. De Witte</a>, <a href="/search/nucl-ex?searchtype=author&query=Fraile%2C+L+M">L. M. Fraile</a>, <a href="/search/nucl-ex?searchtype=author&query=Greenlees%2C+P+T">P. T. Greenlees</a>, <a href="/search/nucl-ex?searchtype=author&query=Huyse%2C+M">M. Huyse</a>, <a href="/search/nucl-ex?searchtype=author&query=Ionescu%2C+A">A. Ionescu</a>, <a href="/search/nucl-ex?searchtype=author&query=Kisyov%2C+S">S. Kisyov</a>, <a href="/search/nucl-ex?searchtype=author&query=Konki%2C+J">J. Konki</a>, <a href="/search/nucl-ex?searchtype=author&query=Lazarus%2C+I">I. Lazarus</a>, <a href="/search/nucl-ex?searchtype=author&query=Madurga%2C+M">M. Madurga</a>, <a href="/search/nucl-ex?searchtype=author&query=Marginean%2C+N">N. Marginean</a>, <a href="/search/nucl-ex?searchtype=author&query=Marginean%2C+R">R. Marginean</a>, <a href="/search/nucl-ex?searchtype=author&query=Mihai%2C+C">C. Mihai</a>, <a href="/search/nucl-ex?searchtype=author&query=Mihai%2C+R+E">R. E. Mihai</a>, <a href="/search/nucl-ex?searchtype=author&query=Negret%2C+A">A. Negret</a>, <a href="/search/nucl-ex?searchtype=author&query=Nowacki%2C+F">F. Nowacki</a> , et al. (31 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1908.11626v1-abstract-short" style="display: inline;"> The structure of $^{34}$Si was studied through $纬$ spectroscopy separately in the $尾^-$ decays of $^{34}$Mg and $^{34}$Al at the ISOLDE facility of CERN. Different configurations in $^{34}$Si were populated independently from the two recently identified $尾$-decaying states in $^{34}$Al having spin-parity assignments $J^蟺= 4^-$ dominated by the normal configuration… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.11626v1-abstract-full').style.display = 'inline'; document.getElementById('1908.11626v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1908.11626v1-abstract-full" style="display: none;"> The structure of $^{34}$Si was studied through $纬$ spectroscopy separately in the $尾^-$ decays of $^{34}$Mg and $^{34}$Al at the ISOLDE facility of CERN. Different configurations in $^{34}$Si were populated independently from the two recently identified $尾$-decaying states in $^{34}$Al having spin-parity assignments $J^蟺= 4^-$ dominated by the normal configuration $蟺(d_{5/2})^{-1} \otimes 谓(f_{7/2})$ and $J^蟺= 1^+$ by the intruder configuration $蟺(d_{5/2})^{-1} \otimes 谓(d_{3/2})^{-1}(f_{7/2})^{2}$. The paper reports on spectroscopic properties of $^{34}$Si such as an extended level scheme, spin and parity assignments based on log($ft$) values and $纬$-ray branching ratios, absolute $尾$ feeding intensities and neutron emission probabilities. A total of 11 newly identified levels and 26 transitions were added to the previously known level scheme of $^{34}$Si. Large scale shell-model calculations using the {\sc sdpf-u-mix} interaction, able to treat higher order intruder configurations, are compared with the new results and conclusions are drawn concerning the predictive power of {\sc sdpf-u-mix}, the $N=20$ shell gap, the level of mixing between normal and intruder configurations for the 0$_1^+$, 0$_2^+$ and 2$_1^+$ states and the absence of triaxial deformation in $^{34}$Si. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.11626v1-abstract-full').style.display = 'none'; document.getElementById('1908.11626v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 August, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1906.07542">arXiv:1906.07542</a> <span> [<a href="https://arxiv.org/pdf/1906.07542">pdf</a>, <a href="https://arxiv.org/ps/1906.07542">ps</a>, <a href="https://arxiv.org/format/1906.07542">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.101.054307">10.1103/PhysRevC.101.054307 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Limits on assigning a shape to a nucleus </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">Alfredo Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Nowacki%2C+F">Frederic Nowacki</a>, <a href="/search/nucl-ex?searchtype=author&query=Alhassid%2C+Y">Yoram Alhassid</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1906.07542v2-abstract-short" style="display: inline;"> The interpretation of nuclear observables in the laboratory frame in terms of the intrinsic deformation parameters beta and gamma is a classical theme in nuclear structure. Here we use the quadrupole invariants (Kumar), calculated within the framework of the configuration-interaction shell model, to clarify the meaning and limitations of nuclear shapes. We introduce a novel method that enables us… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.07542v2-abstract-full').style.display = 'inline'; document.getElementById('1906.07542v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1906.07542v2-abstract-full" style="display: none;"> The interpretation of nuclear observables in the laboratory frame in terms of the intrinsic deformation parameters beta and gamma is a classical theme in nuclear structure. Here we use the quadrupole invariants (Kumar), calculated within the framework of the configuration-interaction shell model, to clarify the meaning and limitations of nuclear shapes. We introduce a novel method that enables us to calculate accurately higher-order invariants and, therefore, the fluctuations in both beta and gamma. We find that the shape parameter beta often has a non-negligible degree of softness, and that the angle gamma is usually characterized by large fluctuations, rendering its effective value not meaningful. Contrary to common belief, we conclude that doubly magic nuclei are not spherical because the notion of a well-defined shape does not apply to them. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.07542v2-abstract-full').style.display = 'none'; document.getElementById('1906.07542v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 April, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 June, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Accepted in Physical Review C. Title changed. Added sections on triaxiality and sphericity</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 101, 054307 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1903.03293">arXiv:1903.03293</a> <span> [<a href="https://arxiv.org/pdf/1903.03293">pdf</a>, <a href="https://arxiv.org/ps/1903.03293">ps</a>, <a href="https://arxiv.org/format/1903.03293">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2019.03.018">10.1016/j.physletb.2019.03.018 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> First spectroscopy of 61Ti and the transition to the Island of Inversion at N = 40 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Wimmer%2C+K">K. Wimmer</a>, <a href="/search/nucl-ex?searchtype=author&query=Recchia%2C+F">F. Recchia</a>, <a href="/search/nucl-ex?searchtype=author&query=Lenzi%2C+S+M">S. M. Lenzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Riccetto%2C+S">S. Riccetto</a>, <a href="/search/nucl-ex?searchtype=author&query=Davinson%2C+T">T. Davinson</a>, <a href="/search/nucl-ex?searchtype=author&query=Estrade%2C+A">A. Estrade</a>, <a href="/search/nucl-ex?searchtype=author&query=Griffin%2C+C+J">C. J. Griffin</a>, <a href="/search/nucl-ex?searchtype=author&query=Nishimura%2C+S">S. Nishimura</a>, <a href="/search/nucl-ex?searchtype=author&query=Nowacki%2C+F">F. Nowacki</a>, <a href="/search/nucl-ex?searchtype=author&query=Phong%2C+V">V. Phong</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=S%C3%B6derstr%C3%B6m%2C+P+-">P. -A. S枚derstr枚m</a>, <a href="/search/nucl-ex?searchtype=author&query=Aktas%2C+O">O. Aktas</a>, <a href="/search/nucl-ex?searchtype=author&query=Al-Aqeel%2C+M">M. Al-Aqeel</a>, <a href="/search/nucl-ex?searchtype=author&query=Ando%2C+T">T. Ando</a>, <a href="/search/nucl-ex?searchtype=author&query=Baba%2C+H">H. Baba</a>, <a href="/search/nucl-ex?searchtype=author&query=Bae%2C+S">S. Bae</a>, <a href="/search/nucl-ex?searchtype=author&query=Choi%2C+S">S. Choi</a>, <a href="/search/nucl-ex?searchtype=author&query=Doornenbal%2C+P">P. Doornenbal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ha%2C+J">J. Ha</a>, <a href="/search/nucl-ex?searchtype=author&query=Harkness-Brennan%2C+L">L. Harkness-Brennan</a>, <a href="/search/nucl-ex?searchtype=author&query=Isobe%2C+T">T. Isobe</a>, <a href="/search/nucl-ex?searchtype=author&query=John%2C+P+R">P. R. John</a>, <a href="/search/nucl-ex?searchtype=author&query=Kahl%2C+D">D. Kahl</a>, <a href="/search/nucl-ex?searchtype=author&query=Kiss%2C+G">G. Kiss</a> , et al. (17 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1903.03293v1-abstract-short" style="display: inline;"> Isomeric states in 59,61Ti have been populated in the projectile fragmentation of a 345 AMeV 238U beam at the Radioactive Isotope Beam Factory. The decay lifetimes and delayed gamma-ray transitions were measured with the EURICA array. Besides the known isomeric state in 59Ti, two isomeric states in 61Ti are observed for the first time. Based on the measured lifetimes, transition multipolarities as… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1903.03293v1-abstract-full').style.display = 'inline'; document.getElementById('1903.03293v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1903.03293v1-abstract-full" style="display: none;"> Isomeric states in 59,61Ti have been populated in the projectile fragmentation of a 345 AMeV 238U beam at the Radioactive Isotope Beam Factory. The decay lifetimes and delayed gamma-ray transitions were measured with the EURICA array. Besides the known isomeric state in 59Ti, two isomeric states in 61Ti are observed for the first time. Based on the measured lifetimes, transition multipolarities as well as tentative spins and parities are assigned. Large-scale shell model calculations based on the modified LNPS interaction show that both 59Ti and 61Ti belong to the Island of Inversion at N=40 with ground state configurations dominated by particle-hole excitations to the g_9/2 and d_5/2 orbits. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1903.03293v1-abstract-full').style.display = 'none'; document.getElementById('1903.03293v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 March, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Phys. Lett. B accepted</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1812.03342">arXiv:1812.03342</a> <span> [<a href="https://arxiv.org/pdf/1812.03342">pdf</a>, <a href="https://arxiv.org/ps/1812.03342">ps</a>, <a href="https://arxiv.org/format/1812.03342">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.99.011301">10.1103/PhysRevC.99.011301 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The structure of 70Fe: Single-particle and collective degrees of freedom </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Gade%2C+A">A. Gade</a>, <a href="/search/nucl-ex?searchtype=author&query=Janssens%2C+R+V+F">R. V. F. Janssens</a>, <a href="/search/nucl-ex?searchtype=author&query=Tostevin%2C+J+A">J. A. Tostevin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bazin%2C+D">D. Bazin</a>, <a href="/search/nucl-ex?searchtype=author&query=Belarge%2C+J">J. Belarge</a>, <a href="/search/nucl-ex?searchtype=author&query=Bender%2C+P+C">P. C. Bender</a>, <a href="/search/nucl-ex?searchtype=author&query=Bottoni%2C+S">S. Bottoni</a>, <a href="/search/nucl-ex?searchtype=author&query=Carpenter%2C+M+P">M. P. Carpenter</a>, <a href="/search/nucl-ex?searchtype=author&query=Elman%2C+B">B. Elman</a>, <a href="/search/nucl-ex?searchtype=author&query=Freeman%2C+S+J">S. J. Freeman</a>, <a href="/search/nucl-ex?searchtype=author&query=Lauritsen%2C+T">T. Lauritsen</a>, <a href="/search/nucl-ex?searchtype=author&query=Lenzi%2C+S+M">S. M. Lenzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Longfellow%2C+B">B. Longfellow</a>, <a href="/search/nucl-ex?searchtype=author&query=Lunderberg%2C+E">E. Lunderberg</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Riley%2C+L+A">L. A. Riley</a>, <a href="/search/nucl-ex?searchtype=author&query=Sharp%2C+D+K">D. K. Sharp</a>, <a href="/search/nucl-ex?searchtype=author&query=Weisshaar%2C+D">D. Weisshaar</a>, <a href="/search/nucl-ex?searchtype=author&query=Zhu%2C+S">S. Zhu</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1812.03342v2-abstract-short" style="display: inline;"> Excited states in the neutron-rich \nuc{70}{Fe} nucleus were populated in a one-proton removal reaction from \nuc{71}{Co} projectiles at 87~MeV/nucleon. A new transition was observed with the $纬$-ray tracking array GRETINA and shown to feed the previously assigned $4^+_1$ state. In comparison to reaction theory calculations with shell-model spectroscopic factors, it is argued that the new $纬$ ray… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1812.03342v2-abstract-full').style.display = 'inline'; document.getElementById('1812.03342v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1812.03342v2-abstract-full" style="display: none;"> Excited states in the neutron-rich \nuc{70}{Fe} nucleus were populated in a one-proton removal reaction from \nuc{71}{Co} projectiles at 87~MeV/nucleon. A new transition was observed with the $纬$-ray tracking array GRETINA and shown to feed the previously assigned $4^+_1$ state. In comparison to reaction theory calculations with shell-model spectroscopic factors, it is argued that the new $纬$ ray possibly originates from the $6^+_1$ state. It is further shown that the Doppler-reconstructed $纬$-ray spectra are sensitive to the very different lifetimes of the $2^+$ and $4^+$ states, enabling their approximate measurement. The emerging structure of \nuc{70}{Fe} is discussed in comparison to LNPS-new large-scale shell-model calculations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1812.03342v2-abstract-full').style.display = 'none'; document.getElementById('1812.03342v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 December, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 December, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">accepted for publication as PRC rapid communication</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 99, 011301(R) (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1802.09986">arXiv:1802.09986</a> <span> [<a href="https://arxiv.org/pdf/1802.09986">pdf</a>, <a href="https://arxiv.org/ps/1802.09986">ps</a>, <a href="https://arxiv.org/format/1802.09986">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2018.02.002">10.1016/j.physletb.2018.02.002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Re-examining the transition into the N=20 island of inversion: structure of $^{30}$Mg </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Fern%C3%A1ndez-Dom%C3%ADnguez%2C+B">B. Fern谩ndez-Dom铆nguez</a>, <a href="/search/nucl-ex?searchtype=author&query=Pietras%2C+B">B. Pietras</a>, <a href="/search/nucl-ex?searchtype=author&query=Catford%2C+W+N">W. N. Catford</a>, <a href="/search/nucl-ex?searchtype=author&query=Orr%2C+N+A">N. A. Orr</a>, <a href="/search/nucl-ex?searchtype=author&query=Petri%2C+M">M. Petri</a>, <a href="/search/nucl-ex?searchtype=author&query=Chartier%2C+M">M. Chartier</a>, <a href="/search/nucl-ex?searchtype=author&query=Paschalis%2C+S">S. Paschalis</a>, <a href="/search/nucl-ex?searchtype=author&query=Patterson%2C+N">N. Patterson</a>, <a href="/search/nucl-ex?searchtype=author&query=Thomas%2C+J+.+S">J . S. Thomas</a>, <a href="/search/nucl-ex?searchtype=author&query=Caama%C3%B1o%2C+M">M. Caama帽o</a>, <a href="/search/nucl-ex?searchtype=author&query=Otsuka%2C+T">T. Otsuka</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Tsunoda%2C+N">N. Tsunoda</a>, <a href="/search/nucl-ex?searchtype=author&query=Achouri%2C+N+L">N. L. Achouri</a>, <a href="/search/nucl-ex?searchtype=author&query=Ang%C3%A9lique%2C+J">J-C. Ang茅lique</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashwood%2C+N+I">N. I. Ashwood</a>, <a href="/search/nucl-ex?searchtype=author&query=Banu%2C+A+.">A . Banu</a>, <a href="/search/nucl-ex?searchtype=author&query=Bastin%2C+B">B. Bastin</a>, <a href="/search/nucl-ex?searchtype=author&query=Borcea%2C+R">R. Borcea</a>, <a href="/search/nucl-ex?searchtype=author&query=Brown%2C+J">J. Brown</a>, <a href="/search/nucl-ex?searchtype=author&query=Delaunay%2C+F">F. Delaunay</a>, <a href="/search/nucl-ex?searchtype=author&query=Franchoo%2C+S">S. Franchoo</a>, <a href="/search/nucl-ex?searchtype=author&query=Freer%2C+M">M. Freer</a>, <a href="/search/nucl-ex?searchtype=author&query=Gaudefroy%2C+L">L. Gaudefroy</a>, <a href="/search/nucl-ex?searchtype=author&query=Heil%2C+S">S. Heil</a> , et al. (12 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1802.09986v1-abstract-short" style="display: inline;"> Intermediate energy single-neutron removal from $^{31}$Mg has been employed to investigate the transition into the N=20 island of inversion. Levels up to 5~MeV excitation energy in $^{30}$Mg were populated and spin-parity assignments were inferred from the corresponding longitudinal momentum distributions and $纬$-ray decay scheme. Comparison with eikonal-model calculations also permitted spectrosc… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.09986v1-abstract-full').style.display = 'inline'; document.getElementById('1802.09986v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1802.09986v1-abstract-full" style="display: none;"> Intermediate energy single-neutron removal from $^{31}$Mg has been employed to investigate the transition into the N=20 island of inversion. Levels up to 5~MeV excitation energy in $^{30}$Mg were populated and spin-parity assignments were inferred from the corresponding longitudinal momentum distributions and $纬$-ray decay scheme. Comparison with eikonal-model calculations also permitted spectroscopic factors to be deduced. Surprisingly, the 0$^{+}_{2}$ level in $^{30}$Mg was found to have a strength much weaker than expected in the conventional picture of a predominantly $2p - 2h$ intruder configuration having a large overlap with the deformed $^{31}$Mg ground state. In addition, negative parity levels were identified for the first time in $^{30}$Mg, one of which is located at low excitation energy. The results are discussed in the light of shell-model calculations employing two newly developed approaches with markedly different descriptions of the structure of $^{30}$Mg. It is concluded that the cross-shell effects in the region of the island of inversion at Z=12 are considerably more complex than previously thought and that $np - nh$ configurations play a major role in the structure of $^{30}$Mg. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.09986v1-abstract-full').style.display = 'none'; document.getElementById('1802.09986v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 February, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Physics Letters B, Volume 779, 10 April 2018, Pages 124-129</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Physics Letters B, Volume 779, 10 April 2018, Pages 124-129 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1608.04360">arXiv:1608.04360</a> <span> [<a href="https://arxiv.org/pdf/1608.04360">pdf</a>, <a href="https://arxiv.org/format/1608.04360">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.94.034312">10.1103/PhysRevC.94.034312 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> High-precision quadrupole moment reveals significant intruder component in 33Al20 ground state </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Heylen%2C+H">H. Heylen</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Rydt%2C+M">M. De Rydt</a>, <a href="/search/nucl-ex?searchtype=author&query=Neyens%2C+G">G. Neyens</a>, <a href="/search/nucl-ex?searchtype=author&query=Bissell%2C+M+L">M. L. Bissell</a>, <a href="/search/nucl-ex?searchtype=author&query=Caceres%2C+L">L. Caceres</a>, <a href="/search/nucl-ex?searchtype=author&query=Chevrier%2C+R">R. Chevrier</a>, <a href="/search/nucl-ex?searchtype=author&query=Daugas%2C+J+M">J. M. Daugas</a>, <a href="/search/nucl-ex?searchtype=author&query=Ichikawa%2C+Y">Y. Ichikawa</a>, <a href="/search/nucl-ex?searchtype=author&query=Ishibashi%2C+Y">Y. Ishibashi</a>, <a href="/search/nucl-ex?searchtype=author&query=Kamalou%2C+O">O. Kamalou</a>, <a href="/search/nucl-ex?searchtype=author&query=Mertzimekis%2C+T+J">T. J. Mertzimekis</a>, <a href="/search/nucl-ex?searchtype=author&query=Morel%2C+P">P. Morel</a>, <a href="/search/nucl-ex?searchtype=author&query=Papuga%2C+J">J. Papuga</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Rajabali%2C+M+M">M. M. Rajabali</a>, <a href="/search/nucl-ex?searchtype=author&query=St%7Fodel%2C+C">C. Stodel</a>, <a href="/search/nucl-ex?searchtype=author&query=Thomas%2C+J+C">J. C. Thomas</a>, <a href="/search/nucl-ex?searchtype=author&query=Ueno%2C+H">H. Ueno</a>, <a href="/search/nucl-ex?searchtype=author&query=Utsuno%2C+Y">Y. Utsuno</a>, <a href="/search/nucl-ex?searchtype=author&query=Yoshida%2C+N">N. Yoshida</a>, <a href="/search/nucl-ex?searchtype=author&query=Yoshimi%2C+A">A. Yoshimi</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1608.04360v1-abstract-short" style="display: inline;"> The electric quadrupole moment of the 33Al20 ground state, located at the border of the island of inversion, was obtained using continuous-beam beta-detected nuclear quadrupole resonance (beta-NQR). From the measured quadrupole coupling constant Q = 2.31(4) MHz in an alpha-Al2O3 crystal, a precise value for the electric quadrupole moment is extracted: Qs= 141(3) mb. A comparison with large-scale s… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1608.04360v1-abstract-full').style.display = 'inline'; document.getElementById('1608.04360v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1608.04360v1-abstract-full" style="display: none;"> The electric quadrupole moment of the 33Al20 ground state, located at the border of the island of inversion, was obtained using continuous-beam beta-detected nuclear quadrupole resonance (beta-NQR). From the measured quadrupole coupling constant Q = 2.31(4) MHz in an alpha-Al2O3 crystal, a precise value for the electric quadrupole moment is extracted: Qs= 141(3) mb. A comparison with large-scale shell model calculations shows that 33Al has at least 50% intruder configurations in the ground state wave function, favoring the excitation of two neutrons across the N = 20 shell gap. 33Al therefore clearly marks the gradual transition north of the deformed Na and Mg nuclei towards the normal Z>14 isotopes. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1608.04360v1-abstract-full').style.display = 'none'; document.getElementById('1608.04360v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 August, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 4 figures. Accepted for publication in Physical Review C</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1605.05103">arXiv:1605.05103</a> <span> [<a href="https://arxiv.org/pdf/1605.05103">pdf</a>, <a href="https://arxiv.org/ps/1605.05103">ps</a>, <a href="https://arxiv.org/format/1605.05103">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.117.272501">10.1103/PhysRevLett.117.272501 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Shape Coexistence in 78 Ni and the new Island of Inversion </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Nowacki%2C+F">F Nowacki</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Caurier%2C+E">E Caurier</a>, <a href="/search/nucl-ex?searchtype=author&query=Bounthong%2C+B">B Bounthong</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1605.05103v2-abstract-short" style="display: inline;"> Large Scale Shell Model calculations (SM-CI) predict that the region of deformation which comprises the heaviest Chromium and Iron isotopes at and beyond N=40 will merge with a new one at N=50 in an astonishing parallel to the N=20 and N=28 case in the Neon and Magnesium isotopes. We propose a valence space including the full pf-shell for the protons and the full sdg shell for the neutrons; which… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1605.05103v2-abstract-full').style.display = 'inline'; document.getElementById('1605.05103v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1605.05103v2-abstract-full" style="display: none;"> Large Scale Shell Model calculations (SM-CI) predict that the region of deformation which comprises the heaviest Chromium and Iron isotopes at and beyond N=40 will merge with a new one at N=50 in an astonishing parallel to the N=20 and N=28 case in the Neon and Magnesium isotopes. We propose a valence space including the full pf-shell for the protons and the full sdg shell for the neutrons; which represents a comeback of the the harmonic oscillator shells in the very neutron rich regime. The onset of deformation is understood in the framework of the algebraic SU3-like structures linked to quadrupole dominance. Our calculations preserve the doubly magic nature of the ground state of 78 Ni, which, however, exhibits a well deformed prolate band at low excitation energy, providing a striking example of shape coexistence far from stability. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1605.05103v2-abstract-full').style.display = 'none'; document.getElementById('1605.05103v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 October, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 May, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 117, 272501 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1602.05029">arXiv:1602.05029</a> <span> [<a href="https://arxiv.org/pdf/1602.05029">pdf</a>, <a href="https://arxiv.org/format/1602.05029">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.93.054316">10.1103/PhysRevC.93.054316 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Occupation numbers of spherical orbits in self-consistent beyond-mean-field methods </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Rodr%C3%ADguez%2C+T+R">Tom谩s R. Rodr铆guez</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">Alfredo Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Nowacki%2C+F">Fr茅d茅ric Nowacki</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1602.05029v1-abstract-short" style="display: inline;"> We present a method to compute the number of particles occupying spherical single-particle (SSP) levels within the energy density functional (EDF) framework. These SSP levels are defined for each nucleus by performing self-consistent mean-field calculations. The nuclear many-body states, in which the occupation numbers are evaluated, are obtained with a symmetry conserving configuration mixing (SC… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1602.05029v1-abstract-full').style.display = 'inline'; document.getElementById('1602.05029v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1602.05029v1-abstract-full" style="display: none;"> We present a method to compute the number of particles occupying spherical single-particle (SSP) levels within the energy density functional (EDF) framework. These SSP levels are defined for each nucleus by performing self-consistent mean-field calculations. The nuclear many-body states, in which the occupation numbers are evaluated, are obtained with a symmetry conserving configuration mixing (SCCM) method based on the Gogny EDF. The method allows a closer comparison between EDF and shell model with configuration mixing in large valence spaces (SM-CI) results, and can serve as a guidance to define physically sound valence spaces for SM-CI calculations. As a first application of the method, we analyze the onset of deformation in neutron-rich $N=40$ isotones and the role of the SSP levels around this harmonic oscillator magic number, with particular emphasis in the structure of $^{64}$Cr. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1602.05029v1-abstract-full').style.display = 'none'; document.getElementById('1602.05029v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 February, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">11 pages, 5 Figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 93, 054316 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1504.04474">arXiv:1504.04474</a> <span> [<a href="https://arxiv.org/pdf/1504.04474">pdf</a>, <a href="https://arxiv.org/ps/1504.04474">ps</a>, <a href="https://arxiv.org/format/1504.04474">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.91.041304">10.1103/PhysRevC.91.041304 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Ground-State Electromagnetic Moments of Calcium Isotopes </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Ruiz%2C+R+F+G">R. F. Garcia Ruiz</a>, <a href="/search/nucl-ex?searchtype=author&query=Bissell%2C+M+L">M. L. Bissell</a>, <a href="/search/nucl-ex?searchtype=author&query=Blaum%2C+K">K. Blaum</a>, <a href="/search/nucl-ex?searchtype=author&query=Frommgen%2C+N">N. Frommgen</a>, <a href="/search/nucl-ex?searchtype=author&query=Hammen%2C+M">M. Hammen</a>, <a href="/search/nucl-ex?searchtype=author&query=Holt%2C+J+D">J. D. Holt</a>, <a href="/search/nucl-ex?searchtype=author&query=Kowalska%2C+M">M. Kowalska</a>, <a href="/search/nucl-ex?searchtype=author&query=Kreim%2C+K">K. Kreim</a>, <a href="/search/nucl-ex?searchtype=author&query=Menendez%2C+J">J. Menendez</a>, <a href="/search/nucl-ex?searchtype=author&query=Neugart%2C+R">R. Neugart</a>, <a href="/search/nucl-ex?searchtype=author&query=Neyens%2C+G">G. Neyens</a>, <a href="/search/nucl-ex?searchtype=author&query=Nortershauser%2C+W">W. Nortershauser</a>, <a href="/search/nucl-ex?searchtype=author&query=Nowacki%2C+F">F. Nowacki</a>, <a href="/search/nucl-ex?searchtype=author&query=Papuga%2C+J">J. Papuga</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Schwenk%2C+A">A. Schwenk</a>, <a href="/search/nucl-ex?searchtype=author&query=Simonis%2C+J">J. Simonis</a>, <a href="/search/nucl-ex?searchtype=author&query=Yordanov%2C+D+T">D. T. Yordanov</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1504.04474v1-abstract-short" style="display: inline;"> High-resolution bunched-beam collinear laser spectroscopy was used to measure the optical hyperfine spectra of the $^{43-51}$Ca isotopes. The ground state magnetic moments of $^{49,51}$Ca and quadrupole moments of $^{47,49,51}$Ca were measured for the first time, and the $^{51}$Ca ground state spin $I=3/2$ was determined in a model-independent way. Our results provide a critical test of modern nuc… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1504.04474v1-abstract-full').style.display = 'inline'; document.getElementById('1504.04474v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1504.04474v1-abstract-full" style="display: none;"> High-resolution bunched-beam collinear laser spectroscopy was used to measure the optical hyperfine spectra of the $^{43-51}$Ca isotopes. The ground state magnetic moments of $^{49,51}$Ca and quadrupole moments of $^{47,49,51}$Ca were measured for the first time, and the $^{51}$Ca ground state spin $I=3/2$ was determined in a model-independent way. Our results provide a critical test of modern nuclear theories based on shell-model calculations using phenomenological as well as microscopic interactions. The results for the neutron-rich isotopes are in excellent agreement with predictions using interactions derived from chiral effective field theory including three-nucleon forces, while lighter isotopes illustrate the presence of particle-hole excitations of the $^{40}$Ca core in their ground state. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1504.04474v1-abstract-full').style.display = 'none'; document.getElementById('1504.04474v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 April, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Accepted as a Rapid Communication in Physical Review C</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Physical Review C 91 041304 (2015) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1401.1593">arXiv:1401.1593</a> <span> [<a href="https://arxiv.org/pdf/1401.1593">pdf</a>, <a href="https://arxiv.org/format/1401.1593">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.112.042502">10.1103/PhysRevLett.112.042502 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Experimental study of the two-body spin-orbit force </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Burgunder%2C+G">G. Burgunder</a>, <a href="/search/nucl-ex?searchtype=author&query=Sorlin%2C+O">O. Sorlin</a>, <a href="/search/nucl-ex?searchtype=author&query=Nowacki%2C+F">F. Nowacki</a>, <a href="/search/nucl-ex?searchtype=author&query=Giron%2C+S">S. Giron</a>, <a href="/search/nucl-ex?searchtype=author&query=Hammache%2C+F">F. Hammache</a>, <a href="/search/nucl-ex?searchtype=author&query=Moukaddam%2C+M">M. Moukaddam</a>, <a href="/search/nucl-ex?searchtype=author&query=eville%2C+N+D+S+e">N. De S er eville</a>, <a href="/search/nucl-ex?searchtype=author&query=Beaumel%2C+D">D. Beaumel</a>, <a href="/search/nucl-ex?searchtype=author&query=aceres%2C+L+C">L. C aceres</a>, <a href="/search/nucl-ex?searchtype=author&query=%C3%A9ment%2C+E+C">E. Cl 茅ment</a>, <a href="/search/nucl-ex?searchtype=author&query=Duch%C3%AAne%2C+G">G. Duch锚ne</a>, <a href="/search/nucl-ex?searchtype=author&query=Ebran%2C+J+P">J. P. Ebran</a>, <a href="/search/nucl-ex?searchtype=author&query=Fernandez-Dominguez%2C+B">B. Fernandez-Dominguez</a>, <a href="/search/nucl-ex?searchtype=author&query=Flavigny%2C+F">F. Flavigny</a>, <a href="/search/nucl-ex?searchtype=author&query=Franchoo%2C+S">S. Franchoo</a>, <a href="/search/nucl-ex?searchtype=author&query=Gibelin%2C+J">J. Gibelin</a>, <a href="/search/nucl-ex?searchtype=author&query=Gillibert%2C+A">A. Gillibert</a>, <a href="/search/nucl-ex?searchtype=author&query=%C3%A9vy%2C+S+G">S. Gr 茅vy</a>, <a href="/search/nucl-ex?searchtype=author&query=Guillot%2C+J">J. Guillot</a>, <a href="/search/nucl-ex?searchtype=author&query=Lapoux%2C+V">V. Lapoux</a>, <a href="/search/nucl-ex?searchtype=author&query=Lepailleur%2C+A">A. Lepailleur</a>, <a href="/search/nucl-ex?searchtype=author&query=Matea%2C+I">I. Matea</a>, <a href="/search/nucl-ex?searchtype=author&query=Matta%2C+A">A. Matta</a>, <a href="/search/nucl-ex?searchtype=author&query=Nalpas%2C+L">L. Nalpas</a>, <a href="/search/nucl-ex?searchtype=author&query=Obertelli%2C+A">A. Obertelli</a> , et al. (9 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1401.1593v1-abstract-short" style="display: inline;"> Energies and spectroscopic factors of the first $7/2^-$, $3/2^-$, $1/2^-$ and $5/2^-$ states in the $^{35}$Si$_{21}$ nucleus were determined by means of the (d,p) transfer reaction in inverse kinematics at GANIL using the MUST2 and EXOGAM detectors. By comparing the spectroscopic information on the $^{35}$Si and $^{37}$S isotones, a reduction of the $p_{3/2} - p_{1/2}$ spin-orbit splitting by abou… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1401.1593v1-abstract-full').style.display = 'inline'; document.getElementById('1401.1593v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1401.1593v1-abstract-full" style="display: none;"> Energies and spectroscopic factors of the first $7/2^-$, $3/2^-$, $1/2^-$ and $5/2^-$ states in the $^{35}$Si$_{21}$ nucleus were determined by means of the (d,p) transfer reaction in inverse kinematics at GANIL using the MUST2 and EXOGAM detectors. By comparing the spectroscopic information on the $^{35}$Si and $^{37}$S isotones, a reduction of the $p_{3/2} - p_{1/2}$ spin-orbit splitting by about 25% is proposed, while the $f_{7/2} -f_{5/2}$ spin-orbit splitting seems to remain constant. These features, derived after having unfolded nuclear correlations using shell model calculations, have been attributed to the properties of the 2-body spin-orbit interaction, the amplitude of which is derived for the first time in an atomic nucleus. The present results, remarkably well reproduced by using several realistic nucleon-nucleon forces, provide a unique touchstone for the modeling of the spin-orbit interaction in atomic nuclei. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1401.1593v1-abstract-full').style.display = 'none'; document.getElementById('1401.1593v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 January, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 3 figures, accepted for publication in Physical Review Letters</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1401.0651">arXiv:1401.0651</a> <span> [<a href="https://arxiv.org/pdf/1401.0651">pdf</a>, <a href="https://arxiv.org/format/1401.0651">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.90.024311">10.1103/PhysRevC.90.024311 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Correlations and neutrinoless $尾尾$ decay nuclear matrix elements of $pf$-shell nuclei </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Men%C3%A9ndez%2C+J">Javier Men茅ndez</a>, <a href="/search/nucl-ex?searchtype=author&query=Rodr%C3%ADguez%2C+T+R">Tomas R. Rodr铆guez</a>, <a href="/search/nucl-ex?searchtype=author&query=Mart%C3%ADnez-Pinedo%2C+G">Gabriel Mart铆nez-Pinedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">Alfredo Poves</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1401.0651v1-abstract-short" style="display: inline;"> We calculate the nuclear matrix elements (NMEs) for neutrinoless double-beta decays ($0谓尾尾$) of $pf$-shell nuclei using the shell model (SM) and energy density functional (EDF) methods. The systematic study of non-physical decays (except for $^{48}$Ca) of Ca$\rightarrow$Ti, Ti$\rightarrow$Cr and Cr$\rightarrow$Fe allows for a detailed comparison between the two nuclear structure approaches. We obs… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1401.0651v1-abstract-full').style.display = 'inline'; document.getElementById('1401.0651v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1401.0651v1-abstract-full" style="display: none;"> We calculate the nuclear matrix elements (NMEs) for neutrinoless double-beta decays ($0谓尾尾$) of $pf$-shell nuclei using the shell model (SM) and energy density functional (EDF) methods. The systematic study of non-physical decays (except for $^{48}$Ca) of Ca$\rightarrow$Ti, Ti$\rightarrow$Cr and Cr$\rightarrow$Fe allows for a detailed comparison between the two nuclear structure approaches. We observe that while the dominant Gamow-Teller part of the NME differs roughly by a factor of two between SM and EDF, when we restrict the calculations to spherical EDF states and seniority-zero SM configurations, the NMEs obtained by both methods are strikingly similar. This points out to the important role of nuclear structure correlations for $0谓尾尾$ decay NMEs. We identify correlations associated with high-seniority components in the initial and final states of the decay as one of the reasons for the discrepancies between SM and EDF results. We also explore exact projection to good isospin, and conclude that it has only a moderate effect in the Gamow-Teller part of the NMEs but strongly affects the Fermi contribution. This work opens up the door for NME benchmarks between different theoretical approaches, and constitutes a step forward towards more reliable estimations of the NMEs. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1401.0651v1-abstract-full').style.display = 'none'; document.getElementById('1401.0651v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 January, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 figures, 7 pages</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 90, 024311 (2014) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1309.6955">arXiv:1309.6955</a> <span> [<a href="https://arxiv.org/pdf/1309.6955">pdf</a>, <a href="https://arxiv.org/ps/1309.6955">ps</a>, <a href="https://arxiv.org/format/1309.6955">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.90.014302">10.1103/PhysRevC.90.014302 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The merging of the islands of inversion at N=20 and N=28 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Caurier%2C+E">Etienne Caurier</a>, <a href="/search/nucl-ex?searchtype=author&query=Nowacki%2C+F">Frederic Nowacki</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">Alfredo Poves</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1309.6955v2-abstract-short" style="display: inline;"> The N=20 and N=28 "islands of inversion" are described by large scale shell model calculations with an extension of the interaction sdpf-u that makes it possible to mix configurations with different Nhw or equivalently with different number of particles promoted from the sd-shell to the pf-shell. It allows to connect the classical sd-shell calculations below N=18 with the sd(protons)-pf(neutrons)… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1309.6955v2-abstract-full').style.display = 'inline'; document.getElementById('1309.6955v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1309.6955v2-abstract-full" style="display: none;"> The N=20 and N=28 "islands of inversion" are described by large scale shell model calculations with an extension of the interaction sdpf-u that makes it possible to mix configurations with different Nhw or equivalently with different number of particles promoted from the sd-shell to the pf-shell. It allows to connect the classical sd-shell calculations below N=18 with the sd(protons)-pf(neutrons) calculations beyond N=24-26, for all the isotopes from Oxygen to Calcium, using the same interaction. For some isotopes this range contains all the nuclei between the proton and the neutron drip lines and includes the N=20 and N=28 islands of inversion. We shall pay particular attention to the properties of the states at fix Nhw which turn out to be the real protagonists of the physics at N=20. The existence of islands of inversion/deformation will be explained as the result of the competition between the spherical mean field which favors the 0hw configurations and the nuclear correlations which favor the deformed Nhw configurations. The Magnesium chain is exceptional because in it, the N=20 and N=28 "islands of inversion" merge, enclosing all the isotopes between N=19 and N=30. Indeed, this would be also the case for the Neon and Sodium chains if their drip lines would reach N=28. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1309.6955v2-abstract-full').style.display = 'none'; document.getElementById('1309.6955v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 2 April, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 September, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 14 figures, Minor modifications, new results added</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1308.5568">arXiv:1308.5568</a> <span> [<a href="https://arxiv.org/pdf/1308.5568">pdf</a>, <a href="https://arxiv.org/format/1308.5568">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.88.044306">10.1103/PhysRevC.88.044306 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Beta-decay of Mn-65 to Fe-65 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Olaizola%2C+B">B. Olaizola</a>, <a href="/search/nucl-ex?searchtype=author&query=Fraile%2C+L+M">L. M. Fraile</a>, <a href="/search/nucl-ex?searchtype=author&query=Mach%2C+H">H. Mach</a>, <a href="/search/nucl-ex?searchtype=author&query=Aprahamian%2C+A">A. Aprahamian</a>, <a href="/search/nucl-ex?searchtype=author&query=Briz%2C+J+A">J. A. Briz</a>, <a href="/search/nucl-ex?searchtype=author&query=Cal-Gonzalez%2C+J">J. Cal-Gonzalez</a>, <a href="/search/nucl-ex?searchtype=author&query=Ghita%2C+D">D. Ghita</a>, <a href="/search/nucl-ex?searchtype=author&query=K%7Foster%2C+U">U. Koster</a>, <a href="/search/nucl-ex?searchtype=author&query=Kurcewicz%2C+W">W. Kurcewicz</a>, <a href="/search/nucl-ex?searchtype=author&query=Lesher%2C+S+R">S. R. Lesher</a>, <a href="/search/nucl-ex?searchtype=author&query=Pauwels%2C+D">D. Pauwels</a>, <a href="/search/nucl-ex?searchtype=author&query=Picado%2C+E">E. Picado</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Radulov%2C+D">D. Radulov</a>, <a href="/search/nucl-ex?searchtype=author&query=Simpson%2C+G+S">G. S. Simpson</a>, <a href="/search/nucl-ex?searchtype=author&query=Udias%2C+J+M">J. M. Udias</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1308.5568v1-abstract-short" style="display: inline;"> The low energy structure of Fe-65 has been studied by means of gamma- and fast-timing spectroscopy. A level scheme of Fe-65 populated following the beta-decay of Mn-65 was established for the first time. It includes 41 levels and 85 transitions. The excitation energy of the beta-decaying isomer in Fe-65 has been precisely determined at 393.7(2) keV. The beta delayed neutron emission branch was mea… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1308.5568v1-abstract-full').style.display = 'inline'; document.getElementById('1308.5568v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1308.5568v1-abstract-full" style="display: none;"> The low energy structure of Fe-65 has been studied by means of gamma- and fast-timing spectroscopy. A level scheme of Fe-65 populated following the beta-decay of Mn-65 was established for the first time. It includes 41 levels and 85 transitions. The excitation energy of the beta-decaying isomer in Fe-65 has been precisely determined at 393.7(2) keV. The beta delayed neutron emission branch was measured as Pn = 7.9(12)%, which cannot be reconciled with the previously reported value of 21.0(5)%. Four gamma-rays and four excited states in Fe-64 were identified as being populated following the beta-n decay. Four lifetimes and five lifetime limits in the subnanosecond range have been measured using the Advanced Time-Delayed Method. The level scheme is compared with shell-model calculations. Tentative spin and parity assignments are proposed based on the observed transition rates, the calculations and the systematics of the region. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1308.5568v1-abstract-full').style.display = 'none'; document.getElementById('1308.5568v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 August, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Accepted in Physical Review C</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">MSC Class:</span> 81V35 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1211.4069">arXiv:1211.4069</a> <span> [<a href="https://arxiv.org/pdf/1211.4069">pdf</a>, <a href="https://arxiv.org/ps/1211.4069">ps</a>, <a href="https://arxiv.org/format/1211.4069">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.86.054320">10.1103/PhysRevC.86.054320 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> High-spin structure in $^{40}$K </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=S%C3%B6derstr%C3%B6m%2C+P+-">P. -A. S枚derstr枚m</a>, <a href="/search/nucl-ex?searchtype=author&query=Recchia%2C+F">F. Recchia</a>, <a href="/search/nucl-ex?searchtype=author&query=Nyberg%2C+J">J. Nyberg</a>, <a href="/search/nucl-ex?searchtype=author&query=Gadea%2C+A">A. Gadea</a>, <a href="/search/nucl-ex?searchtype=author&query=Lenzi%2C+S+M">S. M. Lenzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Ata%C3%A7%2C+A">A. Ata莽</a>, <a href="/search/nucl-ex?searchtype=author&query=Aydin%2C+S">S. Aydin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bazzacco%2C+D">D. Bazzacco</a>, <a href="/search/nucl-ex?searchtype=author&query=Bednarczyk%2C+P">P. Bednarczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellato%2C+M">M. Bellato</a>, <a href="/search/nucl-ex?searchtype=author&query=Birkenbach%2C+B">B. Birkenbach</a>, <a href="/search/nucl-ex?searchtype=author&query=Bortolato%2C+D">D. Bortolato</a>, <a href="/search/nucl-ex?searchtype=author&query=Boston%2C+A+J">A. J. Boston</a>, <a href="/search/nucl-ex?searchtype=author&query=Boston%2C+H+C">H. C. Boston</a>, <a href="/search/nucl-ex?searchtype=author&query=Bruyneel%2C+B">B. Bruyneel</a>, <a href="/search/nucl-ex?searchtype=author&query=Bucurescu%2C+D">D. Bucurescu</a>, <a href="/search/nucl-ex?searchtype=author&query=Calore%2C+E">E. Calore</a>, <a href="/search/nucl-ex?searchtype=author&query=Cederwall%2C+B">B. Cederwall</a>, <a href="/search/nucl-ex?searchtype=author&query=Charles%2C+L">L. Charles</a>, <a href="/search/nucl-ex?searchtype=author&query=Chavas%2C+J">J. Chavas</a>, <a href="/search/nucl-ex?searchtype=author&query=Colosimo%2C+S">S. Colosimo</a>, <a href="/search/nucl-ex?searchtype=author&query=Crespi%2C+F+C+L">F. C. L. Crespi</a>, <a href="/search/nucl-ex?searchtype=author&query=Cullen%2C+D+M">D. M. Cullen</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Angelis%2C+G">G. de Angelis</a> , et al. (52 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1211.4069v1-abstract-short" style="display: inline;"> High-spin states of $^{40}$K have been populated in the fusion-evaporation reaction $^{12}$C($^{30}$Si,np)$^{40}$K and studied by means of $纬$-ray spectroscopy techniques using one AGATA triple cluster detector, at INFN - Laboratori Nazionali di Legnaro. Several new states with excitation energy up to 8 MeV and spin up to $10^-$ have been discovered. These new states are discussed in terms of J=3… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.4069v1-abstract-full').style.display = 'inline'; document.getElementById('1211.4069v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1211.4069v1-abstract-full" style="display: none;"> High-spin states of $^{40}$K have been populated in the fusion-evaporation reaction $^{12}$C($^{30}$Si,np)$^{40}$K and studied by means of $纬$-ray spectroscopy techniques using one AGATA triple cluster detector, at INFN - Laboratori Nazionali di Legnaro. Several new states with excitation energy up to 8 MeV and spin up to $10^-$ have been discovered. These new states are discussed in terms of J=3 and T=0 neutron-proton hole pairs. Shell-model calculations in a large model space have shown a good agreement with the experimental data for most of the energy levels. The evolution of the structure of this nucleus is here studied as a function of excitation energy and angular momentum. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.4069v1-abstract-full').style.display = 'none'; document.getElementById('1211.4069v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 November, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">23 pages, 5 figures, submitted to Phys. Rev. C</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1206.6572">arXiv:1206.6572</a> <span> [<a href="https://arxiv.org/pdf/1206.6572">pdf</a>, <a href="https://arxiv.org/ps/1206.6572">ps</a>, <a href="https://arxiv.org/format/1206.6572">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.109.092503">10.1103/PhysRevLett.109.092503 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Unveiling the intruder deformed 0$^+_2$ state in $^{34}$Si </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Rotaru%2C+F">F. Rotaru</a>, <a href="/search/nucl-ex?searchtype=author&query=Negoita%2C+F">F. Negoita</a>, <a href="/search/nucl-ex?searchtype=author&query=Gr%C3%A9vy%2C+S">S. Gr茅vy</a>, <a href="/search/nucl-ex?searchtype=author&query=Mrazek%2C+J">J. Mrazek</a>, <a href="/search/nucl-ex?searchtype=author&query=Lukyanov%2C+S">S. Lukyanov</a>, <a href="/search/nucl-ex?searchtype=author&query=Nowacki%2C+F">F. Nowacki</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Sorlin%2C+O">O. Sorlin</a>, <a href="/search/nucl-ex?searchtype=author&query=Borcea%2C+C">C. Borcea</a>, <a href="/search/nucl-ex?searchtype=author&query=Borcea%2C+R">R. Borcea</a>, <a href="/search/nucl-ex?searchtype=author&query=Buta%2C+A">A. Buta</a>, <a href="/search/nucl-ex?searchtype=author&query=Caceres%2C+L">L. Caceres</a>, <a href="/search/nucl-ex?searchtype=author&query=Calinescu%2C+S">S. Calinescu</a>, <a href="/search/nucl-ex?searchtype=author&query=Chevrier%2C+R">R. Chevrier</a>, <a href="/search/nucl-ex?searchtype=author&query=Dombradi%2C+Z">Zs. Dombradi</a>, <a href="/search/nucl-ex?searchtype=author&query=Daugas%2C+J+M">J. M. Daugas</a>, <a href="/search/nucl-ex?searchtype=author&query=Lebhertz%2C+D">D. Lebhertz</a>, <a href="/search/nucl-ex?searchtype=author&query=Penionzhkevich%2C+Y">Y. Penionzhkevich</a>, <a href="/search/nucl-ex?searchtype=author&query=Petrone%2C+C">C. Petrone</a>, <a href="/search/nucl-ex?searchtype=author&query=Sohler%2C+D">D. Sohler</a>, <a href="/search/nucl-ex?searchtype=author&query=Stanoiu%2C+M">M. Stanoiu</a>, <a href="/search/nucl-ex?searchtype=author&query=Thomas%2C+J+C">J. C. Thomas</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1206.6572v2-abstract-short" style="display: inline;"> The 0$^+_2$ state in $^{34}$Si has been populated at the {\sc Ganil/Lise3} facility through the $尾$-decay of a newly discovered 1$^+$ isomer in $^{34}$Al of 26(1) ms half-life. The simultaneous detection of $e^+e^-$ pairs allowed the determination of the excitation energy E(0$^+_2$)=2719(3) keV and the half-life T$_{1/2}$=19.4(7) ns, from which an electric monopole strength of $蟻^2$(E0)=13.0(0.9)… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1206.6572v2-abstract-full').style.display = 'inline'; document.getElementById('1206.6572v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1206.6572v2-abstract-full" style="display: none;"> The 0$^+_2$ state in $^{34}$Si has been populated at the {\sc Ganil/Lise3} facility through the $尾$-decay of a newly discovered 1$^+$ isomer in $^{34}$Al of 26(1) ms half-life. The simultaneous detection of $e^+e^-$ pairs allowed the determination of the excitation energy E(0$^+_2$)=2719(3) keV and the half-life T$_{1/2}$=19.4(7) ns, from which an electric monopole strength of $蟻^2$(E0)=13.0(0.9)$\times10^{-3}$ was deduced. The 2$^+_1$ state is observed to decay both to the 0$^+_1$ ground state and to the newly observed 0$^+_2$ state (via a 607(2) keV transition) with a ratio R(2$^+_1$$\rightarrow0^+_1/2^+_1$$\rightarrow0^+_2$)=1380(717). Gathering all information, a weak mixing with the 0$^+_1$ and a large deformation parameter of $尾$=0.29(4) are found for the 0$^+_2$ state, in good agreement with shell model calculations using a new {\sc sdpf-u-mix} interaction allowing \textit{np-nh} excitations across the N=20 shell gap. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1206.6572v2-abstract-full').style.display = 'none'; document.getElementById('1206.6572v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 July, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 June, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 3 figures, accepted for publication in Physical Review Letters</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> GANIL P 2012-08 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Physical Review Letters 109 (2012) 092503 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1202.6154">arXiv:1202.6154</a> <span> [<a href="https://arxiv.org/pdf/1202.6154">pdf</a>, <a href="https://arxiv.org/ps/1202.6154">ps</a>, <a href="https://arxiv.org/format/1202.6154">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.85.031301">10.1103/PhysRevC.85.031301 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Discovery of a new isomeric state in $^{68}$Ni: Evidence for a highly-deformed proton intruder state </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Dijon%2C+A">A. Dijon</a>, <a href="/search/nucl-ex?searchtype=author&query=Cl%C3%A9ment%2C+E">E. Cl茅ment</a>, <a href="/search/nucl-ex?searchtype=author&query=De+France%2C+G">G. De France</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Angelis%2C+G">G. De Angelis</a>, <a href="/search/nucl-ex?searchtype=author&query=Duch%C3%AAne%2C+G">G. Duch锚ne</a>, <a href="/search/nucl-ex?searchtype=author&query=Dudouet%2C+J">J. Dudouet</a>, <a href="/search/nucl-ex?searchtype=author&query=Franchoo%2C+S">S. Franchoo</a>, <a href="/search/nucl-ex?searchtype=author&query=Gadea%2C+A">A. Gadea</a>, <a href="/search/nucl-ex?searchtype=author&query=Gottardo%2C+A">A. Gottardo</a>, <a href="/search/nucl-ex?searchtype=author&query=H%C3%BCy%C3%BCk%2C+T">T. H眉y眉k</a>, <a href="/search/nucl-ex?searchtype=author&query=Jacquot%2C+B">B. Jacquot</a>, <a href="/search/nucl-ex?searchtype=author&query=Kusoglu%2C+A">A. Kusoglu</a>, <a href="/search/nucl-ex?searchtype=author&query=Lebhertz%2C+D">D. Lebhertz</a>, <a href="/search/nucl-ex?searchtype=author&query=Lehaut%2C+G">G. Lehaut</a>, <a href="/search/nucl-ex?searchtype=author&query=Martini%2C+M">M. Martini</a>, <a href="/search/nucl-ex?searchtype=author&query=Napoli%2C+D+R">D. R. Napoli</a>, <a href="/search/nucl-ex?searchtype=author&query=Nowacki%2C+F">F. Nowacki</a>, <a href="/search/nucl-ex?searchtype=author&query=P%C3%A9ru%2C+S">S. P茅ru</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Recchia%2C+F">F. Recchia</a>, <a href="/search/nucl-ex?searchtype=author&query=Redon%2C+N">N. Redon</a>, <a href="/search/nucl-ex?searchtype=author&query=Sahin%2C+E">E. Sahin</a>, <a href="/search/nucl-ex?searchtype=author&query=Schmitt%2C+C">C. Schmitt</a>, <a href="/search/nucl-ex?searchtype=author&query=Sferrazza%2C+M">M. Sferrazza</a>, <a href="/search/nucl-ex?searchtype=author&query=Sieja%2C+K">K. Sieja</a> , et al. (4 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1202.6154v1-abstract-short" style="display: inline;"> We report on the observation of a new isomeric state in $^{68}$Ni. We suggest that the newly observed state at 168(1) keV above the first 2$^+$ state is a $蟺(2p-2h)$ 0$^{+}$ state across the major Z=28 shell gap. Comparison with theoretical calculations indicates a pure proton intruder configuration and the deduced low-lying structure of this key nucleus suggests a possible shape coexistence scena… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1202.6154v1-abstract-full').style.display = 'inline'; document.getElementById('1202.6154v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1202.6154v1-abstract-full" style="display: none;"> We report on the observation of a new isomeric state in $^{68}$Ni. We suggest that the newly observed state at 168(1) keV above the first 2$^+$ state is a $蟺(2p-2h)$ 0$^{+}$ state across the major Z=28 shell gap. Comparison with theoretical calculations indicates a pure proton intruder configuration and the deduced low-lying structure of this key nucleus suggests a possible shape coexistence scenario involving a highly deformed state. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1202.6154v1-abstract-full').style.display = 'none'; document.getElementById('1202.6154v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 February, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 3 figures, accepted for publication in Physical Review C</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> GANIL P 2012-06 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Physical Review C 85 (2012) 031301 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1201.1366">arXiv:1201.1366</a> <span> [<a href="https://arxiv.org/pdf/1201.1366">pdf</a>, <a href="https://arxiv.org/ps/1201.1366">ps</a>, <a href="https://arxiv.org/format/1201.1366">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.85.024311">10.1103/PhysRevC.85.024311 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> In-beam spectroscopic studies of $^{44}$S nucleus </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Caceres%2C+L">L. Caceres</a>, <a href="/search/nucl-ex?searchtype=author&query=Sohler%2C+D">D. Sohler</a>, <a href="/search/nucl-ex?searchtype=author&query=Gr%C3%A9vy%2C+S">S. Gr茅vy</a>, <a href="/search/nucl-ex?searchtype=author&query=Sorlin%2C+O">O. Sorlin</a>, <a href="/search/nucl-ex?searchtype=author&query=Dombradi%2C+Z">Zs. Dombradi</a>, <a href="/search/nucl-ex?searchtype=author&query=Bastin%2C+B">B. Bastin</a>, <a href="/search/nucl-ex?searchtype=author&query=Achouri%2C+N+L">N. L. Achouri</a>, <a href="/search/nucl-ex?searchtype=author&query=Ang%C3%A9lique%2C+J+C">J. C. Ang茅lique</a>, <a href="/search/nucl-ex?searchtype=author&query=Azaiez%2C+F">F. Azaiez</a>, <a href="/search/nucl-ex?searchtype=author&query=Baiborodin%2C+D">D. Baiborodin</a>, <a href="/search/nucl-ex?searchtype=author&query=Borcea%2C+R">R. Borcea</a>, <a href="/search/nucl-ex?searchtype=author&query=Bourgeois%2C+C">C. Bourgeois</a>, <a href="/search/nucl-ex?searchtype=author&query=Buta%2C+A">A. Buta</a>, <a href="/search/nucl-ex?searchtype=author&query=B%C3%BCrger%2C+A">A. B眉rger</a>, <a href="/search/nucl-ex?searchtype=author&query=Chapman%2C+R">R. Chapman</a>, <a href="/search/nucl-ex?searchtype=author&query=Dalouzy%2C+J+C">J. C. Dalouzy</a>, <a href="/search/nucl-ex?searchtype=author&query=Dlouhy%2C+Z">Z. Dlouhy</a>, <a href="/search/nucl-ex?searchtype=author&query=Drouard%2C+A">A. Drouard</a>, <a href="/search/nucl-ex?searchtype=author&query=Elekes%2C+Z">Z. Elekes</a>, <a href="/search/nucl-ex?searchtype=author&query=Franchoo%2C+S">S. Franchoo</a>, <a href="/search/nucl-ex?searchtype=author&query=Gaudefroy%2C+L">L. Gaudefroy</a>, <a href="/search/nucl-ex?searchtype=author&query=Iacob%2C+S">S. Iacob</a>, <a href="/search/nucl-ex?searchtype=author&query=Laurent%2C+B">B. Laurent</a>, <a href="/search/nucl-ex?searchtype=author&query=Lazar%2C+M">M. Lazar</a>, <a href="/search/nucl-ex?searchtype=author&query=Liang%2C+X">X. Liang</a> , et al. (14 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1201.1366v1-abstract-short" style="display: inline;"> The structure of the $^{44}$S nucleus has been studied at GANIL through the one proton knock-out reaction from a $^{45}$Cl secondary beam at 42 A$\cdot$MeV. The $纬$ rays following the de-excitation of $^{44}$S were detected in flight using the 70 BaF${_2}$ detectors of the Ch芒teau de Cristal array. An exhaustive $纬纬$-coincidence analysis allowed an unambiguous construction of the level scheme up t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1201.1366v1-abstract-full').style.display = 'inline'; document.getElementById('1201.1366v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1201.1366v1-abstract-full" style="display: none;"> The structure of the $^{44}$S nucleus has been studied at GANIL through the one proton knock-out reaction from a $^{45}$Cl secondary beam at 42 A$\cdot$MeV. The $纬$ rays following the de-excitation of $^{44}$S were detected in flight using the 70 BaF${_2}$ detectors of the Ch芒teau de Cristal array. An exhaustive $纬纬$-coincidence analysis allowed an unambiguous construction of the level scheme up to an excitation energy of 3301 keV. The existence of the spherical 2$^+_2$ state is confirmed and three new $纬$-ray transitions connecting the prolate deformed 2$^+_1$ level were observed. Comparison of the experimental results to shell model calculations further supports a prolate and spherical shape coexistence with a large mixing of states built on the ground state band in $^{44}$S. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1201.1366v1-abstract-full').style.display = 'none'; document.getElementById('1201.1366v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 January, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 5 figures, accepted for publication in Physical Review C</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Physical Review C 85 (2012) 024311 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1112.5039">arXiv:1112.5039</a> <span> [<a href="https://arxiv.org/pdf/1112.5039">pdf</a>, <a href="https://arxiv.org/ps/1112.5039">ps</a>, <a href="https://arxiv.org/format/1112.5039">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2012.03.076">10.1016/j.physletb.2012.03.076 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Shell Model description of the beta beta decay of 136Xe </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Caurier%2C+E">Etienne Caurier</a>, <a href="/search/nucl-ex?searchtype=author&query=Nowacki%2C+F">Frederic Nowacki</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">Alfredo Poves</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1112.5039v2-abstract-short" style="display: inline;"> We study in this letter the double beta decay of 136Xe with emission of two neutrinos which has been recently measured by the EXO-200 collaboration. We use the same shell model framework, valence space, and effective interaction that we have already employed in our calculation of the nuclear matrix element (NME) of its neutrinoless double beta decay. Using the quenching factor of the Gamow-Teller… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1112.5039v2-abstract-full').style.display = 'inline'; document.getElementById('1112.5039v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1112.5039v2-abstract-full" style="display: none;"> We study in this letter the double beta decay of 136Xe with emission of two neutrinos which has been recently measured by the EXO-200 collaboration. We use the same shell model framework, valence space, and effective interaction that we have already employed in our calculation of the nuclear matrix element (NME) of its neutrinoless double beta decay. Using the quenching factor of the Gamow-Teller operator which is needed to reproduce the very recent high resolution 136Xe (3He, t)136Cs data, we obtain a nuclear matrix element M(2nu)=0.025 MeV^(-1) compared with the experimental value M(2nu)=0.019(2) MeV^(-1). <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1112.5039v2-abstract-full').style.display = 'none'; document.getElementById('1112.5039v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 March, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 December, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Revised version accepted in Physics Letters B. Figure 3 replaced</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1109.5623">arXiv:1109.5623</a> <span> [<a href="https://arxiv.org/pdf/1109.5623">pdf</a>, <a href="https://arxiv.org/ps/1109.5623">ps</a>, <a href="https://arxiv.org/format/1109.5623">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/0031-8949/2012/T150/014030">10.1088/0031-8949/2012/T150/014030 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The Nuclear Shell Model Toward the Drip Lines </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Caurier%2C+E">E. Caurier</a>, <a href="/search/nucl-ex?searchtype=author&query=Nowacki%2C+F">F. Nowacki</a>, <a href="/search/nucl-ex?searchtype=author&query=Sieja%2C+K">K. Sieja</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1109.5623v1-abstract-short" style="display: inline;"> We describe the "islands of inversion" that occur when approaching the neutron drip line around the magic numbers N=20, N=28 and N=40 in the framework of the Interacting Shell Model in very large valence spaces. We explain these configuration inversions (and the associated shape transitions) as the result of the competition between the spherical mean field (monopole) which favors magicity and the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1109.5623v1-abstract-full').style.display = 'inline'; document.getElementById('1109.5623v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1109.5623v1-abstract-full" style="display: none;"> We describe the "islands of inversion" that occur when approaching the neutron drip line around the magic numbers N=20, N=28 and N=40 in the framework of the Interacting Shell Model in very large valence spaces. We explain these configuration inversions (and the associated shape transitions) as the result of the competition between the spherical mean field (monopole) which favors magicity and the correlations (multipole) which favor deformed intruder states. We also show that the N=20 and N=28 islands are in reallity a single one, which for the Magnesium isotopes is limited by N=18 and N=32. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1109.5623v1-abstract-full').style.display = 'none'; document.getElementById('1109.5623v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 September, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Proceedings of the Nordic Conference in Nuclear Physics 2011, Stockholm, to appear in Physica Scripta</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1009.3813">arXiv:1009.3813</a> <span> [<a href="https://arxiv.org/pdf/1009.3813">pdf</a>, <a href="https://arxiv.org/ps/1009.3813">ps</a>, <a href="https://arxiv.org/format/1009.3813">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.82.064304">10.1103/PhysRevC.82.064304 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Collectivity in the light Xenon isotopes: A shell model study </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Caurier%2C+E">E. Caurier</a>, <a href="/search/nucl-ex?searchtype=author&query=Nowacki%2C+F">F. Nowacki</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Sieja%2C+K">K. Sieja</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1009.3813v1-abstract-short" style="display: inline;"> The lightest Xenon isotopes are studied in the framework of the Interacting Shell Model (ISM). The valence space comprises all the orbits lying between the magic closures N=Z=50 and N=Z=82. The calculations produce collective deformed structures of triaxial nature that encompass nicely the known experimental data. Predictions are made for the (still unknown) N=Z nucleus 108-Xe. The results are int… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1009.3813v1-abstract-full').style.display = 'inline'; document.getElementById('1009.3813v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1009.3813v1-abstract-full" style="display: none;"> The lightest Xenon isotopes are studied in the framework of the Interacting Shell Model (ISM). The valence space comprises all the orbits lying between the magic closures N=Z=50 and N=Z=82. The calculations produce collective deformed structures of triaxial nature that encompass nicely the known experimental data. Predictions are made for the (still unknown) N=Z nucleus 108-Xe. The results are interpreted in terms of the competition between the quadrupole correlations enhanced by the pseudo-SU(3) structure of the positive parity orbits and the pairing correlations brought in by the 0h11/2 orbit. We have studied as well the effect of the excitations from the 100-Sn core on our predictions. We show that the backbending in this region is due to the alignment of two particles in the 0h11/2 orbit. In the N=Z case, one neutron and one proton align to J=11 and T=0. In 110-Xe and 112-Xe the alignment begins in the J=10 T=1 channel and it is dominantly of neutron neutron type. Approaching the band termination the alignment of a neutron and a proton to J=11 and T=0 takes over. In a more academic mood, we have explored the role of the isovector and isoscalar pairing correlations on the structure on the yrast bands of 108-Xe and 110-Xe and examined the role of the isovector and isoscalar pairing condensates in these N~Z nuclei. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1009.3813v1-abstract-full').style.display = 'none'; document.getElementById('1009.3813v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 September, 2010; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2010. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 10 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.C82:064304,2010 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1006.5631">arXiv:1006.5631</a> <span> [<a href="https://arxiv.org/pdf/1006.5631">pdf</a>, <a href="https://arxiv.org/ps/1006.5631">ps</a>, <a href="https://arxiv.org/format/1006.5631">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1742-6596/267/1/012058">10.1088/1742-6596/267/1/012058 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Novel Nuclear Structure Aspects of the Neutrinoless Double Beta Decay </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Menendez%2C+J">J. Menendez</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Caurier%2C+E">E. Caurier</a>, <a href="/search/nucl-ex?searchtype=author&query=Nowacki%2C+F">F. Nowacki</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1006.5631v3-abstract-short" style="display: inline;"> We explore the influence of the deformation on the nuclear matrix elements of the neutrinoless double beta decay (NME), concluding that the difference in deformation -or more generally in the amount of quadrupole correlations- between parent and grand daughter nuclei quenches strongly the decay. We correlate these differences with the seniority structure of the nuclear wave functions. In this cont… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1006.5631v3-abstract-full').style.display = 'inline'; document.getElementById('1006.5631v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1006.5631v3-abstract-full" style="display: none;"> We explore the influence of the deformation on the nuclear matrix elements of the neutrinoless double beta decay (NME), concluding that the difference in deformation -or more generally in the amount of quadrupole correlations- between parent and grand daughter nuclei quenches strongly the decay. We correlate these differences with the seniority structure of the nuclear wave functions. In this context, we examine the present discrepancies between the NME's obtained in the framework of the Interacting Shell Model and the Quasiparticle RPA. We surmise that part of the discrepancy can be due to the limitations of the spherical QRPA in treating nuclei which have strong quadrupole correlations. We surmise that the NME's in a basis of generalized seniority are approximately model independent, i. e. they are "universal". <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1006.5631v3-abstract-full').style.display = 'none'; document.getElementById('1006.5631v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 July, 2010; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 June, 2010; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2010. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Proceedings of the 10th International Spring Seminar On Nuclear Physics, New Quests In Nuclear Structure, Vietri Sul Mare, May 21-25, 2010 (references added)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J.Phys.Conf.Ser.267:012058,2011 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0904.4212">arXiv:0904.4212</a> <span> [<a href="https://arxiv.org/pdf/0904.4212">pdf</a>, <a href="https://arxiv.org/ps/0904.4212">ps</a>, <a href="https://arxiv.org/format/0904.4212">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2009.05.050">10.1016/j.physletb.2009.05.050 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Evidence of a new state in $^{11}$Be observed in the $^{11}$Li $尾$-decay </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Madurga%2C+M">M. Madurga</a>, <a href="/search/nucl-ex?searchtype=author&query=Borge%2C+M+J+G">M. J. G. Borge</a>, <a href="/search/nucl-ex?searchtype=author&query=Alcorta%2C+M">M. Alcorta</a>, <a href="/search/nucl-ex?searchtype=author&query=Fraile%2C+L+M">L. M. Fraile</a>, <a href="/search/nucl-ex?searchtype=author&query=Fynbo%2C+H+O+U">H. O. U. Fynbo</a>, <a href="/search/nucl-ex?searchtype=author&query=Jonsond%2C+B">B. Jonsond</a>, <a href="/search/nucl-ex?searchtype=author&query=Kirsebom%2C+O">O. Kirsebom</a>, <a href="/search/nucl-ex?searchtype=author&query=Martinez-Pinedo%2C+G">G. Martinez-Pinedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Nilsson%2C+T">T. Nilsson</a>, <a href="/search/nucl-ex?searchtype=author&query=Nyman%2C+G">G. Nyman</a>, <a href="/search/nucl-ex?searchtype=author&query=Perea%2C+A">A. Perea</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Riisager%2C+K">K. Riisager</a>, <a href="/search/nucl-ex?searchtype=author&query=Tengblad%2C+O">O. Tengblad</a>, <a href="/search/nucl-ex?searchtype=author&query=Tengborn%2C+E">E. Tengborn</a>, <a href="/search/nucl-ex?searchtype=author&query=Van+der+Walle%2C+J">J. Van der Walle</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="0904.4212v1-abstract-short" style="display: inline;"> Coincidences between charged particles emitted in the $尾$-decay of $^{11}$Li were observed using highly segmented detectors. The breakup channels involving three particles were studied in full kinematics allowing for the reconstruction of the excitation energy of the $^{11}$Be states participating in the decay. In particular, the contribution of a previously unobserved state at 16.3 MeV in… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0904.4212v1-abstract-full').style.display = 'inline'; document.getElementById('0904.4212v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0904.4212v1-abstract-full" style="display: none;"> Coincidences between charged particles emitted in the $尾$-decay of $^{11}$Li were observed using highly segmented detectors. The breakup channels involving three particles were studied in full kinematics allowing for the reconstruction of the excitation energy of the $^{11}$Be states participating in the decay. In particular, the contribution of a previously unobserved state at 16.3 MeV in $^{11}$Be has been identified selecting the $伪$ + $^7$He$\to伪$ + $^6$He+n channel. The angular correlations between the $伪$ particle and the center of mass of the $^6$He+n system favors spin and parity assignment of 3/2$^-$ for this state as well as for the previously known state at 18 MeV. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0904.4212v1-abstract-full').style.display = 'none'; document.getElementById('0904.4212v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 April, 2009; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2009. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">13 pages, 6 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Lett.B677:255-259,2009 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0712.2936">arXiv:0712.2936</a> <span> [<a href="https://arxiv.org/pdf/0712.2936">pdf</a>, <a href="https://arxiv.org/ps/0712.2936">ps</a>, <a href="https://arxiv.org/format/0712.2936">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.79.014310">10.1103/PhysRevC.79.014310 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A new effective interaction for $0\hbar蠅$ shell model calculations in the sdpf valence space </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Nowacki%2C+F">F. Nowacki</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="0712.2936v3-abstract-short" style="display: inline;"> The neutron rich isotopes with Z<20, in particular those with neutron numbers around N=28,have been at the focus of a lot experimental and theoretical scrutiny during the last few years.Shell model calculations using the effective interaction SDPF-NR, were able to predictor to explain most of the properties featured by these nuclei. Prominent among them is the disappearance of the N=28 shell clo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0712.2936v3-abstract-full').style.display = 'inline'; document.getElementById('0712.2936v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0712.2936v3-abstract-full" style="display: none;"> The neutron rich isotopes with Z<20, in particular those with neutron numbers around N=28,have been at the focus of a lot experimental and theoretical scrutiny during the last few years.Shell model calculations using the effective interaction SDPF-NR, were able to predictor to explain most of the properties featured by these nuclei. Prominent among them is the disappearance of the N=28 shell closure for Z<=16. We have incorporated to SDPF-NR some modifications, either on purely theoretical grounds or guided by new experimental information. The proposed interaction, SDPF-U, contains USD as its sd-shell part and KB3G as its pf-shell-part. Its range of applicability is enlarged and its reliability enhanced with respect to the earlier version. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0712.2936v3-abstract-full').style.display = 'none'; document.getElementById('0712.2936v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 January, 2009; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 December, 2007; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2007. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages 4 figures, accepted in Phys. Rev. C</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.C79:014310,2009 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0705.4526">arXiv:0705.4526</a> <span> [<a href="https://arxiv.org/pdf/0705.4526">pdf</a>, <a href="https://arxiv.org/ps/0705.4526">ps</a>, <a href="https://arxiv.org/format/0705.4526">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.99.022503">10.1103/PhysRevLett.99.022503 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Collapse of the N=28 shell closure in $^{42}$Si </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Bastin%2C+B">B. Bastin</a>, <a href="/search/nucl-ex?searchtype=author&query=Gr%C3%A9vy%2C+S">S. Gr茅vy</a>, <a href="/search/nucl-ex?searchtype=author&query=Sohler%2C+D">D. Sohler</a>, <a href="/search/nucl-ex?searchtype=author&query=Sorlin%2C+O">O. Sorlin</a>, <a href="/search/nucl-ex?searchtype=author&query=Dombr%C3%A1di%2C+Z">Zs. Dombr谩di</a>, <a href="/search/nucl-ex?searchtype=author&query=Achouri%2C+N+L">N. L. Achouri</a>, <a href="/search/nucl-ex?searchtype=author&query=Ang%C3%A9lique%2C+J+C">J. C. Ang茅lique</a>, <a href="/search/nucl-ex?searchtype=author&query=Azaiez%2C+F">F. Azaiez</a>, <a href="/search/nucl-ex?searchtype=author&query=Baiborodin%2C+D">D. Baiborodin</a>, <a href="/search/nucl-ex?searchtype=author&query=Borcea%2C+R">R. Borcea</a>, <a href="/search/nucl-ex?searchtype=author&query=Bourgeois%2C+C">C. Bourgeois</a>, <a href="/search/nucl-ex?searchtype=author&query=Buta%2C+A">A. Buta</a>, <a href="/search/nucl-ex?searchtype=author&query=B%C3%BCrger%2C+A">A. B眉rger</a>, <a href="/search/nucl-ex?searchtype=author&query=Chapman%2C+R">R. Chapman</a>, <a href="/search/nucl-ex?searchtype=author&query=Dalouzy%2C+J+C">J. C. Dalouzy</a>, <a href="/search/nucl-ex?searchtype=author&query=Dlouhy%2C+Z">Z. Dlouhy</a>, <a href="/search/nucl-ex?searchtype=author&query=Drouard%2C+A">A. Drouard</a>, <a href="/search/nucl-ex?searchtype=author&query=Elekes%2C+Z">Z. Elekes</a>, <a href="/search/nucl-ex?searchtype=author&query=Franchoo%2C+S">S. Franchoo</a>, <a href="/search/nucl-ex?searchtype=author&query=Iacob%2C+S">S. Iacob</a>, <a href="/search/nucl-ex?searchtype=author&query=Laurent%2C+B">B. Laurent</a>, <a href="/search/nucl-ex?searchtype=author&query=Lazar%2C+M">M. Lazar</a>, <a href="/search/nucl-ex?searchtype=author&query=Liang%2C+X">X. Liang</a>, <a href="/search/nucl-ex?searchtype=author&query=Li%C3%A9nard%2C+E">E. Li茅nard</a>, <a href="/search/nucl-ex?searchtype=author&query=Mrazek%2C+J">J. Mrazek</a> , et al. (12 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="0705.4526v1-abstract-short" style="display: inline;"> The energies of the excited states in very neutron-rich $^{42}$Si and $^{41,43}$P have been measured using in-beam $纬$-ray spectroscopy from the fragmentation of secondary beams of $^{42,44}$S at 39 A.MeV. The low 2$^+$ energy of $^{42}$Si, 770(19) keV, together with the level schemes of $^{41,43}$P provide evidence for the disappearance of the Z=14 and N=28 spherical shell closures, which is as… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0705.4526v1-abstract-full').style.display = 'inline'; document.getElementById('0705.4526v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0705.4526v1-abstract-full" style="display: none;"> The energies of the excited states in very neutron-rich $^{42}$Si and $^{41,43}$P have been measured using in-beam $纬$-ray spectroscopy from the fragmentation of secondary beams of $^{42,44}$S at 39 A.MeV. The low 2$^+$ energy of $^{42}$Si, 770(19) keV, together with the level schemes of $^{41,43}$P provide evidence for the disappearance of the Z=14 and N=28 spherical shell closures, which is ascribed mainly to the action of proton-neutron tensor forces. New shell model calculations indicate that $^{42}$Si is best described as a well deformed oblate rotor. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0705.4526v1-abstract-full').style.display = 'none'; document.getElementById('0705.4526v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 May, 2007; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2007. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">4 pages, 3 figures, accepted for publication in Phys. Rev. lett</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.Lett.99:022503,2007 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/nucl-ex/9907001">arXiv:nucl-ex/9907001</a> <span> [<a href="https://arxiv.org/pdf/nucl-ex/9907001">pdf</a>, <a href="https://arxiv.org/ps/nucl-ex/9907001">ps</a>, <a href="https://arxiv.org/format/nucl-ex/9907001">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.60.021303">10.1103/PhysRevC.60.021303 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Band termination in the N=Z Odd-Odd Nucleus 46V </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Lenzi%2C+S+M">S. M. Lenzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Napoli%2C+D+R">D. R. Napoli</a>, <a href="/search/nucl-ex?searchtype=author&query=Ur%2C+C+A">C. A. Ur</a>, <a href="/search/nucl-ex?searchtype=author&query=Bazzacco%2C+D">D. Bazzacco</a>, <a href="/search/nucl-ex?searchtype=author&query=Brandolini%2C+F">F. Brandolini</a>, <a href="/search/nucl-ex?searchtype=author&query=Cameron%2C+J+A">J. A. Cameron</a>, <a href="/search/nucl-ex?searchtype=author&query=Caurier%2C+E">E. Caurier</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Angelis%2C+G">G. de Angelis</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Poli%2C+M">M. De Poli</a>, <a href="/search/nucl-ex?searchtype=author&query=Farnea%2C+E">E. Farnea</a>, <a href="/search/nucl-ex?searchtype=author&query=Gadea%2C+A">A. Gadea</a>, <a href="/search/nucl-ex?searchtype=author&query=Hankonen%2C+S">S. Hankonen</a>, <a href="/search/nucl-ex?searchtype=author&query=Lunardi%2C+S">S. Lunardi</a>, <a href="/search/nucl-ex?searchtype=author&query=Martinez-Pinedo%2C+G">G. Martinez-Pinedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Podolyak%2C+Z">Zs. Podolyak</a>, <a href="/search/nucl-ex?searchtype=author&query=Poves%2C+A">A. Poves</a>, <a href="/search/nucl-ex?searchtype=author&query=Alvarez%2C+C+R">C. Rossi Alvarez</a>, <a href="/search/nucl-ex?searchtype=author&query=Sanchez-Solano%2C+J">J. Sanchez-Solano</a>, <a href="/search/nucl-ex?searchtype=author&query=Somacal%2C+H">H. Somacal</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="nucl-ex/9907001v1-abstract-short" style="display: inline;"> High spin states in the odd-odd N=Z nucleus 46V have been identified. At low spin, the T=1 isobaric analogue states of 46Ti are established up to I = 6+. Other high spin states, including the band terminating state, are tentatively assigned to the same T=1 band. The T=0 band built on the low-lying 3+ isomer is observed up to the 1f7/2-shell termination at I=15. Both signatures of a negative pari… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('nucl-ex/9907001v1-abstract-full').style.display = 'inline'; document.getElementById('nucl-ex/9907001v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="nucl-ex/9907001v1-abstract-full" style="display: none;"> High spin states in the odd-odd N=Z nucleus 46V have been identified. At low spin, the T=1 isobaric analogue states of 46Ti are established up to I = 6+. Other high spin states, including the band terminating state, are tentatively assigned to the same T=1 band. The T=0 band built on the low-lying 3+ isomer is observed up to the 1f7/2-shell termination at I=15. Both signatures of a negative parity T=0 band are observed up to the terminating states at I = 16- and I = 17-, respectively. The structure of this band is interpreted as a particle-hole excitation from the 1d3/2 shell. Spherical shell model calculations are found to be in excellent agreement with the experimental results. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('nucl-ex/9907001v1-abstract-full').style.display = 'none'; document.getElementById('nucl-ex/9907001v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 July, 1999; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 1999. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.C60:021303,1999 </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/about">About</a></li> <li><a href="https://info.arxiv.org/help">Help</a></li> </ul> </div> <div class="column"> <ul class="nav-spaced"> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>contact arXiv</title><desc>Click here to contact arXiv</desc><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 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