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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/2111.02898">arXiv:2111.02898</a> <span> [<a href="https://arxiv.org/pdf/2111.02898">pdf</a>, <a href="https://arxiv.org/format/2111.02898">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Pulse shape discrimination for GRIT: beam test of a new integrated charge and current preamplifier coupled with high granularity Silicon detectors </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Dormard%2C+J+-">J. -J. Dormard</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=Grassi%2C+L">L. Grassi</a>, <a href="/search/nucl-ex?searchtype=author&query=Rauly%2C+E">E. Rauly</a>, <a href="/search/nucl-ex?searchtype=author&query=Beaumel%2C+D">D. Beaumel</a>, <a href="/search/nucl-ex?searchtype=author&query=Brulin%2C+G">G. Brulin</a>, <a href="/search/nucl-ex?searchtype=author&query=Chabot%2C+M">M. Chabot</a>, <a href="/search/nucl-ex?searchtype=author&query=Coacolo%2C+J+-">J. -L. Coacolo</a>, <a href="/search/nucl-ex?searchtype=author&query=Flavigny%2C+F">F. Flavigny</a>, <a href="/search/nucl-ex?searchtype=author&query=Genolini%2C+B">B. Genolini</a>, <a href="/search/nucl-ex?searchtype=author&query=Hammache%2C+F">F. Hammache</a>, <a href="/search/nucl-ex?searchtype=author&query=Barkach%2C+T+I">T. Id Barkach</a>, <a href="/search/nucl-ex?searchtype=author&query=Rindel%2C+E">E. Rindel</a>, <a href="/search/nucl-ex?searchtype=author&query=Rosier%2C+P">Ph. Rosier</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=Wanlin%2C+E">E. Wanlin</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="2111.02898v1-abstract-short" style="display: inline;"> The GRIT (Granularity, Resolution, Identification, Transparency) Silicon array is intended to measure direct reactions. Its design is based on several layers (three layers in the forward direction, two backward) of custom-made trapezoidal and square detectors. The first stage is 500 渭m thick and features 128x128 orthogonal strips. Pulse shape analysis for particle identification is implemented for… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.02898v1-abstract-full').style.display = 'inline'; document.getElementById('2111.02898v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2111.02898v1-abstract-full" style="display: none;"> The GRIT (Granularity, Resolution, Identification, Transparency) Silicon array is intended to measure direct reactions. Its design is based on several layers (three layers in the forward direction, two backward) of custom-made trapezoidal and square detectors. The first stage is 500 渭m thick and features 128x128 orthogonal strips. Pulse shape analysis for particle identification is implemented for this first layer. Given the compacity of this array and the large number of channels involved (>7,500), an integrated preamplifier, iPACI, that gives charge and current information has been developed in the AMS 0.35 渭m BiCMOS technology. The design specifications and results of the test bench are presented. Considering an energy range of 50 MeV and an energy resolution (FWHM) of 12 keV (FWHM) for the preamplifier, the energy resolution for one strip obtained from alpha source measurement in real conditions is 35 keV. The current output bandwidth is measured at 130 MHz for small signals and the power consumption reaches 40 mW per detector channel. A first beam test was performed coupling a nTD trapezoidal double-sided stripped Silicon detector of GRIT with the iPACI preamplifier and a 64-channel digitizer. Z=1 particles are discriminated with pulse shape analysis technique down to 2 MeV for protons, 2.5 MeV for deuterons and 3 MeV for tritons. The effect of the strip length due to the trapezoidal shape of the detector is investigated on both the N- and the P-side, showing no significant impact. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.02898v1-abstract-full').style.display = 'none'; document.getElementById('2111.02898v1-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> 4 November, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1809.09693">arXiv:1809.09693</a> <span> [<a href="https://arxiv.org/pdf/1809.09693">pdf</a>, <a href="https://arxiv.org/format/1809.09693">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</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.nima.2019.03.082">10.1016/j.nima.2019.03.082 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The FAZIA setup: a review on the electronics and the mechanical mounting </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Valdr%C3%A9%2C+S">S. Valdr茅</a>, <a href="/search/nucl-ex?searchtype=author&query=Casini%2C+G">G. Casini</a>, <a href="/search/nucl-ex?searchtype=author&query=Neindre%2C+N+L">N. Le Neindre</a>, <a href="/search/nucl-ex?searchtype=author&query=Bini%2C+M">M. Bini</a>, <a href="/search/nucl-ex?searchtype=author&query=Boiano%2C+A">A. Boiano</a>, <a href="/search/nucl-ex?searchtype=author&query=Borderie%2C+B">B. Borderie</a>, <a href="/search/nucl-ex?searchtype=author&query=Edelbruck%2C+P">P. Edelbruck</a>, <a href="/search/nucl-ex?searchtype=author&query=Poggi%2C+G">G. Poggi</a>, <a href="/search/nucl-ex?searchtype=author&query=Salomon%2C+F">F. Salomon</a>, <a href="/search/nucl-ex?searchtype=author&query=Tortone%2C+G">G. Tortone</a>, <a href="/search/nucl-ex?searchtype=author&query=Alba%2C+R">R. Alba</a>, <a href="/search/nucl-ex?searchtype=author&query=Barlini%2C+S">S. Barlini</a>, <a href="/search/nucl-ex?searchtype=author&query=Bonnet%2C+E">E. Bonnet</a>, <a href="/search/nucl-ex?searchtype=author&query=Bougault%2C+R">R. Bougault</a>, <a href="/search/nucl-ex?searchtype=author&query=Bougard%2C+A">A. Bougard</a>, <a href="/search/nucl-ex?searchtype=author&query=Brulin%2C+G">G. Brulin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bruno%2C+M">M. Bruno</a>, <a href="/search/nucl-ex?searchtype=author&query=Buccola%2C+A">A. Buccola</a>, <a href="/search/nucl-ex?searchtype=author&query=Camaiani%2C+A">A. Camaiani</a>, <a href="/search/nucl-ex?searchtype=author&query=Chbihi%2C+A">A. Chbihi</a>, <a href="/search/nucl-ex?searchtype=author&query=Ciampi%2C+C">C. Ciampi</a>, <a href="/search/nucl-ex?searchtype=author&query=Cicerchia%2C+M">M. Cicerchia</a>, <a href="/search/nucl-ex?searchtype=author&query=Cinausero%2C+M">M. Cinausero</a>, <a href="/search/nucl-ex?searchtype=author&query=Dell%27Aquila%2C+D">D. Dell'Aquila</a>, <a href="/search/nucl-ex?searchtype=author&query=Desrues%2C+P">P. Desrues</a> , et al. (56 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="1809.09693v2-abstract-short" style="display: inline;"> In this paper the technological aspects of the FAZIA array will be explored. After a productive commissioning phase, FAZIA blocks started to measure and give very useful data to explore the physics of Fermi energy heavy-ion reactions. This was possible thanks to many technical measures and innovations developed in the commissioning phase and tuned during the first experimental campaigns. This pape… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.09693v2-abstract-full').style.display = 'inline'; document.getElementById('1809.09693v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1809.09693v2-abstract-full" style="display: none;"> In this paper the technological aspects of the FAZIA array will be explored. After a productive commissioning phase, FAZIA blocks started to measure and give very useful data to explore the physics of Fermi energy heavy-ion reactions. This was possible thanks to many technical measures and innovations developed in the commissioning phase and tuned during the first experimental campaigns. This paper gives a detailed description of the present status of the FAZIA setup from the electronic and mechanical point of view, trying also to trace a path for new improvements and refinements of the apparatus. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.09693v2-abstract-full').style.display = 'none'; document.getElementById('1809.09693v2-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 April, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 September, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">17 pages, 9 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nucl. Instrum. Meth. A 930 (2019) 27-36 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1608.04332">arXiv:1608.04332</a> <span> [<a href="https://arxiv.org/pdf/1608.04332">pdf</a>, <a href="https://arxiv.org/ps/1608.04332">ps</a>, <a href="https://arxiv.org/format/1608.04332">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.94.034608">10.1103/PhysRevC.94.034608 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Results of the ASY-EOS experiment at GSI: The symmetry energy at suprasaturation density </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Russotto%2C+P">P. Russotto</a>, <a href="/search/nucl-ex?searchtype=author&query=Gannon%2C+S">S. Gannon</a>, <a href="/search/nucl-ex?searchtype=author&query=Kupny%2C+S">S. Kupny</a>, <a href="/search/nucl-ex?searchtype=author&query=Lasko%2C+P">P. Lasko</a>, <a href="/search/nucl-ex?searchtype=author&query=Acosta%2C+L">L. Acosta</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+M">M. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Al-Ajlan%2C+A">A. Al-Ajlan</a>, <a href="/search/nucl-ex?searchtype=author&query=Al-Garawi%2C+M">M. Al-Garawi</a>, <a href="/search/nucl-ex?searchtype=author&query=Al-Homaidhi%2C+S">S. Al-Homaidhi</a>, <a href="/search/nucl-ex?searchtype=author&query=Amorini%2C+F">F. Amorini</a>, <a href="/search/nucl-ex?searchtype=author&query=Auditore%2C+L">L. Auditore</a>, <a href="/search/nucl-ex?searchtype=author&query=Aumann%2C+T">T. Aumann</a>, <a href="/search/nucl-ex?searchtype=author&query=Ayyad%2C+Y">Y. Ayyad</a>, <a href="/search/nucl-ex?searchtype=author&query=Basrak%2C+Z">Z. Basrak</a>, <a href="/search/nucl-ex?searchtype=author&query=Benlliure%2C+J">J. Benlliure</a>, <a href="/search/nucl-ex?searchtype=author&query=Boisjoli%2C+M">M. Boisjoli</a>, <a href="/search/nucl-ex?searchtype=author&query=Boretzky%2C+K">K. Boretzky</a>, <a href="/search/nucl-ex?searchtype=author&query=Brzychczyk%2C+J">J. Brzychczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Budzanowski%2C+A">A. Budzanowski</a>, <a href="/search/nucl-ex?searchtype=author&query=Caesar%2C+C">C. Caesar</a>, <a href="/search/nucl-ex?searchtype=author&query=Cardella%2C+G">G. Cardella</a>, <a href="/search/nucl-ex?searchtype=author&query=Cammarata%2C+P">P. Cammarata</a>, <a href="/search/nucl-ex?searchtype=author&query=Chajecki%2C+Z">Z. Chajecki</a>, <a href="/search/nucl-ex?searchtype=author&query=Chartier%2C+M">M. Chartier</a>, <a href="/search/nucl-ex?searchtype=author&query=Chbihi%2C+A">A. Chbihi</a> , et al. (67 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="1608.04332v2-abstract-short" style="display: inline;"> Directed and elliptic flows of neutrons and light charged particles were measured for the reaction 197Au+197Au at 400 MeV/nucleon incident energy within the ASY-EOS experimental campaign at the GSI laboratory. The detection system consisted of the Large Area Neutron Detector LAND, combined with parts of the CHIMERA multidetector, of the ALADIN Time-of-flight Wall, and of the Washington-University… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1608.04332v2-abstract-full').style.display = 'inline'; document.getElementById('1608.04332v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1608.04332v2-abstract-full" style="display: none;"> Directed and elliptic flows of neutrons and light charged particles were measured for the reaction 197Au+197Au at 400 MeV/nucleon incident energy within the ASY-EOS experimental campaign at the GSI laboratory. The detection system consisted of the Large Area Neutron Detector LAND, combined with parts of the CHIMERA multidetector, of the ALADIN Time-of-flight Wall, and of the Washington-University Microball detector. The latter three arrays were used for the event characterization and reaction-plane reconstruction. In addition, an array of triple telescopes, KRATTA, was used for complementary measurements of the isotopic composition and flows of light charged particles. From the comparison of the elliptic flow ratio of neutrons with respect to charged particles with UrQMD predictions, a value 纬= 0.72 \pm 0.19 is obtained for the power-law coefficient describing the density dependence of the potential part in the parametrization of the symmetry energy. It represents a new and more stringent constraint for the regime of supra-saturation density and confirms, with a considerably smaller uncertainty, the moderately soft to linear density dependence deduced from the earlier FOPI-LAND data. The densities probed are shown to reach beyond twice saturation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1608.04332v2-abstract-full').style.display = 'none'; document.getElementById('1608.04332v2-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 September, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 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">25 pages, 22 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> Phys. Rev. C 94, 034608 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1501.00801">arXiv:1501.00801</a> <span> [<a href="https://arxiv.org/pdf/1501.00801">pdf</a>, <a href="https://arxiv.org/ps/1501.00801">ps</a>, <a href="https://arxiv.org/format/1501.00801">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.91.041601">10.1103/PhysRevC.91.041601 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Dipolar degrees of freedom and Isospin equilibration processes in Heavy Ion collisions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Papa%2C+M">M. Papa</a>, <a href="/search/nucl-ex?searchtype=author&query=Berceanu%2C+I">I. Berceanu</a>, <a href="/search/nucl-ex?searchtype=author&query=Acosta%2C+L">L. Acosta</a>, <a href="/search/nucl-ex?searchtype=author&query=Amorini%2C+F">F. Amorini</a>, <a href="/search/nucl-ex?searchtype=author&query=Agodi%2C+C">C. Agodi</a>, <a href="/search/nucl-ex?searchtype=author&query=Anzalone%2C+A">A. Anzalone</a>, <a href="/search/nucl-ex?searchtype=author&query=Auditore%2C+L">L. Auditore</a>, <a href="/search/nucl-ex?searchtype=author&query=Cardella%2C+G">G. Cardella</a>, <a href="/search/nucl-ex?searchtype=author&query=Cavallaro%2C+S">S. Cavallaro</a>, <a href="/search/nucl-ex?searchtype=author&query=Chatterjee%2C+M+B">M. B. Chatterjee</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Filippo%2C+E">E. De Filippo</a>, <a href="/search/nucl-ex?searchtype=author&query=Francalanza%2C+L">L. Francalanza</a>, <a href="/search/nucl-ex?searchtype=author&query=Geraci%2C+E">E. Geraci</a>, <a href="/search/nucl-ex?searchtype=author&query=Grassi%2C+L">L. Grassi</a>, <a href="/search/nucl-ex?searchtype=author&query=Gnoffo%2C+B">B. Gnoffo</a>, <a href="/search/nucl-ex?searchtype=author&query=Han%2C+J">J. Han</a>, <a href="/search/nucl-ex?searchtype=author&query=La+Guidara%2C+E">E. La Guidara</a>, <a href="/search/nucl-ex?searchtype=author&query=Lanzalone%2C+G">G. Lanzalone</a>, <a href="/search/nucl-ex?searchtype=author&query=Lombardo%2C+I">I. Lombardo</a>, <a href="/search/nucl-ex?searchtype=author&query=Pagano%2C+C+M+T+M+A">C. Maiolino T. Minniti A. Pagano</a>, <a href="/search/nucl-ex?searchtype=author&query=Pagano%2C+E+V">E. V. Pagano</a>, <a href="/search/nucl-ex?searchtype=author&query=Pirrone%2C+S">S. Pirrone</a>, <a href="/search/nucl-ex?searchtype=author&query=Politi%2C+G">G. Politi</a>, <a href="/search/nucl-ex?searchtype=author&query=Porto%2C+F">F. Porto</a>, <a href="/search/nucl-ex?searchtype=author&query=Quattrocchi%2C+L">L. Quattrocchi</a> , et al. (7 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="1501.00801v1-abstract-short" style="display: inline;"> Background: In heavy ion collision at the Fermi energies Isospin equilibration processes occur- ring when nuclei with different charge/mass asymmetries interacts have been investigated to get information on the nucleon-nucleon Iso-vectorial effective interaction. Purpose: In this paper, for the system 48Ca +27 Al at 40 MeV/nucleon, we investigate on this process by means of an observable tightly l… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1501.00801v1-abstract-full').style.display = 'inline'; document.getElementById('1501.00801v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1501.00801v1-abstract-full" style="display: none;"> Background: In heavy ion collision at the Fermi energies Isospin equilibration processes occur- ring when nuclei with different charge/mass asymmetries interacts have been investigated to get information on the nucleon-nucleon Iso-vectorial effective interaction. Purpose: In this paper, for the system 48Ca +27 Al at 40 MeV/nucleon, we investigate on this process by means of an observable tightly linked to isospin equilibration processes and sensitive in exclusive way to the dynamical stage of the collision. From the comparison with dynamical model calculations we want also to obtain information on the Iso-vectorial effective microscopic interaction. Method: The average time derivative of the total dipole associated to the relative motion of all emitted charged particles and fragments has been determined from the measured charges and velocities by using the 4? multi-detector CHIMERA. The average has been determined for semi- peripheral collisions and for different charges Zb of the biggest produced fragment. Experimental evidences collected for the systems 27Al+48Ca and 27Al+40Ca at 40 MeV/nucleon used to support this novel method of investigation are also discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1501.00801v1-abstract-full').style.display = 'none'; document.getElementById('1501.00801v1-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 January, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 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">Submitted for publication on Phys. Rev. C. 0n 24-oct-2014</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1212.4593">arXiv:1212.4593</a> <span> [<a href="https://arxiv.org/pdf/1212.4593">pdf</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.nima.2013.03.028">10.1016/j.nima.2013.03.028 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Kinematical coincidence method in transfer reactions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Acosta%2C+L">L. Acosta</a>, <a href="/search/nucl-ex?searchtype=author&query=Amorini%2C+F">F. Amorini</a>, <a href="/search/nucl-ex?searchtype=author&query=Auditore%2C+L">L. Auditore</a>, <a href="/search/nucl-ex?searchtype=author&query=Berceanu%2C+I">I. Berceanu</a>, <a href="/search/nucl-ex?searchtype=author&query=Cardella%2C+G">G. Cardella</a>, <a href="/search/nucl-ex?searchtype=author&query=Chatterjiee%2C+M+B">M. B. Chatterjiee</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Filippo%2C+E">E. De Filippo</a>, <a href="/search/nucl-ex?searchtype=author&query=FrancalanzA%2C+L">L. FrancalanzA</a>, <a href="/search/nucl-ex?searchtype=author&query=Gian%C3%AC%2C+R">R. Gian矛</a>, <a href="/search/nucl-ex?searchtype=author&query=Grassi%2C+L">L. Grassi</a>, <a href="/search/nucl-ex?searchtype=author&query=Grzeszczuk%2C+A">A. Grzeszczuk</a>, <a href="/search/nucl-ex?searchtype=author&query=La+Guidara%2C+E">E. La Guidara</a>, <a href="/search/nucl-ex?searchtype=author&query=Lanzalone%2C+G">G. Lanzalone</a>, <a href="/search/nucl-ex?searchtype=author&query=Lombardo%2C+I">I. Lombardo</a>, <a href="/search/nucl-ex?searchtype=author&query=Loria%2C+D">D. Loria</a>, <a href="/search/nucl-ex?searchtype=author&query=Minniti%2C+T">T. Minniti</a>, <a href="/search/nucl-ex?searchtype=author&query=Pagano%2C+E+V">E. V. Pagano</a>, <a href="/search/nucl-ex?searchtype=author&query=Papa%2C+M">M. Papa</a>, <a href="/search/nucl-ex?searchtype=author&query=Pirrone%2C+S">S. Pirrone</a>, <a href="/search/nucl-ex?searchtype=author&query=Politi%2C+G">G. Politi</a>, <a href="/search/nucl-ex?searchtype=author&query=Pop%2C+A">A. Pop</a>, <a href="/search/nucl-ex?searchtype=author&query=Porto%2C+F">F. Porto</a>, <a href="/search/nucl-ex?searchtype=author&query=Rizzo%2C+F">F. Rizzo</a>, <a href="/search/nucl-ex?searchtype=author&query=Rosato%2C+E">E. Rosato</a>, <a href="/search/nucl-ex?searchtype=author&query=Russotto%2C+P">P. Russotto</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="1212.4593v2-abstract-short" style="display: inline;"> A new method to extract high resolution angular distributions from kinematical coincidence measurements in binary reactions is presented. Kinematic is used to extract the center of mass angular distribution from the measured energy spectrum of light particles. Results obtained in the case of 10Be+p-->9Be+d reaction measured with the CHIMERA detector are shown. An angular resolution of few degrees… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1212.4593v2-abstract-full').style.display = 'inline'; document.getElementById('1212.4593v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1212.4593v2-abstract-full" style="display: none;"> A new method to extract high resolution angular distributions from kinematical coincidence measurements in binary reactions is presented. Kinematic is used to extract the center of mass angular distribution from the measured energy spectrum of light particles. Results obtained in the case of 10Be+p-->9Be+d reaction measured with the CHIMERA detector are shown. An angular resolution of few degrees in the center of mass is obtained. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1212.4593v2-abstract-full').style.display = 'none'; document.getElementById('1212.4593v2-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 December, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 19 December, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 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 Page 10 Figures submitted to Nuclear Instruments and Methods A</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1209.6461">arXiv:1209.6461</a> <span> [<a href="https://arxiv.org/pdf/1209.6461">pdf</a>, <a href="https://arxiv.org/ps/1209.6461">ps</a>, <a href="https://arxiv.org/format/1209.6461">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/10.1088/1742-6596/420/1/012105">10.1088/1742-6596/420/1/012105 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Correlations between isospin dynamics and Intermediate Mass Fragments emission time scales: a probe for the symmetry energy in asymmetric nuclear matter </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=De+Filippo%2C+E">E. De Filippo</a>, <a href="/search/nucl-ex?searchtype=author&query=Amorini%2C+F">F. Amorini</a>, <a href="/search/nucl-ex?searchtype=author&query=Auditore%2C+L">L. Auditore</a>, <a href="/search/nucl-ex?searchtype=author&query=Baran%2C+V">V. Baran</a>, <a href="/search/nucl-ex?searchtype=author&query=Berceanu%2C+I">I. Berceanu</a>, <a href="/search/nucl-ex?searchtype=author&query=Cardella%2C+G">G. Cardella</a>, <a href="/search/nucl-ex?searchtype=author&query=Colonna%2C+M">M. Colonna</a>, <a href="/search/nucl-ex?searchtype=author&query=Geraci%2C+E">E. Geraci</a>, <a href="/search/nucl-ex?searchtype=author&query=Gian%C3%AC%2C+S">S. Gian矛</a>, <a href="/search/nucl-ex?searchtype=author&query=Grassi%2C+L">L. Grassi</a>, <a href="/search/nucl-ex?searchtype=author&query=Grzeszczuk%2C+A">A. Grzeszczuk</a>, <a href="/search/nucl-ex?searchtype=author&query=Guazzoni%2C+P">P. Guazzoni</a>, <a href="/search/nucl-ex?searchtype=author&query=Han%2C+J">J. Han</a>, <a href="/search/nucl-ex?searchtype=author&query=La+Guidara%2C+E">E. La Guidara</a>, <a href="/search/nucl-ex?searchtype=author&query=Lanzalone%2C+G">G. Lanzalone</a>, <a href="/search/nucl-ex?searchtype=author&query=Lombardo%2C+I">I. Lombardo</a>, <a href="/search/nucl-ex?searchtype=author&query=Maiolino%2C+C">C. Maiolino</a>, <a href="/search/nucl-ex?searchtype=author&query=Minniti%2C+T">T. Minniti</a>, <a href="/search/nucl-ex?searchtype=author&query=Pagano%2C+A">A. Pagano</a>, <a href="/search/nucl-ex?searchtype=author&query=Papa%2C+M">M. Papa</a>, <a href="/search/nucl-ex?searchtype=author&query=Piasecki%2C+E">E. Piasecki</a>, <a href="/search/nucl-ex?searchtype=author&query=Pirrone%2C+S">S. Pirrone</a>, <a href="/search/nucl-ex?searchtype=author&query=Politi%2C+G">G. Politi</a>, <a href="/search/nucl-ex?searchtype=author&query=Pop%2C+A">A. Pop</a>, <a href="/search/nucl-ex?searchtype=author&query=Porto%2C+F">F. Porto</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="1209.6461v1-abstract-short" style="display: inline;"> We show new data from the $^{64}$Ni+$^{124}$Sn and $^{58}$Ni+$^{112}$Sn reactions studied in direct kinematics with the CHIMERA detector at INFN-LNS and compared with the reverse kinematics reactions at the same incident beam energy (35 A MeV). Analyzing the data with the method of relative velocity correlations, fragments coming from statistical decay of an excited projectile-like (PLF) or target… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1209.6461v1-abstract-full').style.display = 'inline'; document.getElementById('1209.6461v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1209.6461v1-abstract-full" style="display: none;"> We show new data from the $^{64}$Ni+$^{124}$Sn and $^{58}$Ni+$^{112}$Sn reactions studied in direct kinematics with the CHIMERA detector at INFN-LNS and compared with the reverse kinematics reactions at the same incident beam energy (35 A MeV). Analyzing the data with the method of relative velocity correlations, fragments coming from statistical decay of an excited projectile-like (PLF) or target-like (TLF) fragments are discriminated from the ones coming from dynamical emission in the early stages of the reaction. By comparing data of the reverse kinematics experiment with a stochastic mean field (SMF) + GEMINI calculations our results show that observables from neck fragmentation mechanism add valuable constraints on the density dependence of symmetry energy. An indication is found for a moderately stiff symmetry energy potential term of EOS. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1209.6461v1-abstract-full').style.display = 'none'; document.getElementById('1209.6461v1-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 September, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">Talk given by E. De Filippo at the 11th International Conference on Nucleus-Nucleus Collisions (NN2012), San Antonio, Texas, USA, May 27-June 1, 2012. To appear in the NN2012 Proceedings in Journal of Physics: Conference Series (JPCS)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1209.5961">arXiv:1209.5961</a> <span> [<a href="https://arxiv.org/pdf/1209.5961">pdf</a>, <a href="https://arxiv.org/ps/1209.5961">ps</a>, <a href="https://arxiv.org/format/1209.5961">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/10.1088/1742-6596/420/1/012092">10.1088/1742-6596/420/1/012092 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The ASY-EOS experiment at GSI: investigating the symmetry energy at supra-saturation densities </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Russotto%2C+P">P. Russotto</a>, <a href="/search/nucl-ex?searchtype=author&query=Chartier%2C+M">M. Chartier</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Filippo%2C+E">E. De Filippo</a>, <a href="/search/nucl-ex?searchtype=author&query=F%C3%A9vre%2C+A+L">A. Le F茅vre</a>, <a href="/search/nucl-ex?searchtype=author&query=Gannon%2C+S">S. Gannon</a>, <a href="/search/nucl-ex?searchtype=author&query=Ga%C5%A1pari%C4%87%2C+I">I. Ga拧pari膰</a>, <a href="/search/nucl-ex?searchtype=author&query=Ki%C5%A1%2C+M">M. Ki拧</a>, <a href="/search/nucl-ex?searchtype=author&query=Kupny%2C+S">S. Kupny</a>, <a href="/search/nucl-ex?searchtype=author&query=Leifels%2C+Y">Y. Leifels</a>, <a href="/search/nucl-ex?searchtype=author&query=Lemmon%2C+R+C">R. C. Lemmon</a>, <a href="/search/nucl-ex?searchtype=author&query=%C5%81ukasik%2C+J">J. 艁ukasik</a>, <a href="/search/nucl-ex?searchtype=author&query=Marini%2C+P">P. Marini</a>, <a href="/search/nucl-ex?searchtype=author&query=Pagano%2C+A">A. Pagano</a>, <a href="/search/nucl-ex?searchtype=author&query=Paw%C5%82owski%2C+P">P. Paw艂owski</a>, <a href="/search/nucl-ex?searchtype=author&query=Santoro%2C+S">S. Santoro</a>, <a href="/search/nucl-ex?searchtype=author&query=Trautmann%2C+W">W. Trautmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Veselsky%2C+M">M. Veselsky</a>, <a href="/search/nucl-ex?searchtype=author&query=Acosta%2C+L">L. Acosta</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+M">M. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Al-Ajlan%2C+A">A. Al-Ajlan</a>, <a href="/search/nucl-ex?searchtype=author&query=Al-Garawi%2C+M">M. Al-Garawi</a>, <a href="/search/nucl-ex?searchtype=author&query=Al-Homaidhi%2C+S">S. Al-Homaidhi</a>, <a href="/search/nucl-ex?searchtype=author&query=Amorini%2C+F">F. Amorini</a>, <a href="/search/nucl-ex?searchtype=author&query=Auditore%2C+L">L. Auditore</a>, <a href="/search/nucl-ex?searchtype=author&query=Aumann%2C+T">T. Aumann</a> , et al. (67 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="1209.5961v1-abstract-short" style="display: inline;"> The elliptic-flow ratio of neutrons with respect to protons in reactions of neutron rich heavy-ions systems at intermediate energies has been proposed as an observable sensitive to the strength of the symmetry term in the nuclear Equation Of State (EOS) at supra-saturation densities. The recent results obtained from the existing FOPI/LAND data for $^{197}$Au+$^{197}$Au collisions at 400 MeV/nucleo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1209.5961v1-abstract-full').style.display = 'inline'; document.getElementById('1209.5961v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1209.5961v1-abstract-full" style="display: none;"> The elliptic-flow ratio of neutrons with respect to protons in reactions of neutron rich heavy-ions systems at intermediate energies has been proposed as an observable sensitive to the strength of the symmetry term in the nuclear Equation Of State (EOS) at supra-saturation densities. The recent results obtained from the existing FOPI/LAND data for $^{197}$Au+$^{197}$Au collisions at 400 MeV/nucleon in comparison with the UrQMD model allowed a first estimate of the symmetry term of the EOS but suffer from a considerable statistical uncertainty. In order to obtain an improved data set for Au+Au collisions and to extend the study to other systems, a new experiment was carried out at the GSI laboratory by the ASY-EOS collaboration in May 2011. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1209.5961v1-abstract-full').style.display = 'none'; document.getElementById('1209.5961v1-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, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">Talk given by P. Russotto at the 11th International Conference on Nucleus-Nucleus Collisions (NN2012), San Antonio, Texas, USA, May 27-June 1, 2012. To appear in the NN2012 Proceedings in Journal of Physics: Conference Series (JPCS)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0809.1196">arXiv:0809.1196</a> <span> [<a href="https://arxiv.org/pdf/0809.1196">pdf</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.102.112701">10.1103/PhysRevLett.102.112701 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Isospin Dependence of Incomplete Fusion Reactions at 25 Mev/a </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Amorini%2C+F">F. Amorini</a>, <a href="/search/nucl-ex?searchtype=author&query=Cardella%2C+G">G. Cardella</a>, <a href="/search/nucl-ex?searchtype=author&query=Giuliani%2C+G">G. Giuliani</a>, <a href="/search/nucl-ex?searchtype=author&query=Papa%2C+M">M. Papa</a>, <a href="/search/nucl-ex?searchtype=author&query=Agodi%2C+C">C. Agodi</a>, <a href="/search/nucl-ex?searchtype=author&query=Alba%2C+R">R. Alba</a>, <a href="/search/nucl-ex?searchtype=author&query=Anzalone%2C+A">A. Anzalone</a>, <a href="/search/nucl-ex?searchtype=author&query=Berceanu%2C+I">I. Berceanu</a>, <a href="/search/nucl-ex?searchtype=author&query=Cavallaro%2C+S">S. Cavallaro</a>, <a href="/search/nucl-ex?searchtype=author&query=Chatterjee%2C+M+B">M. B. Chatterjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Coniglione%2C+R">R. Coniglione</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Filippo%2C+E">E. De Filippo</a>, <a href="/search/nucl-ex?searchtype=author&query=Di+Pietro%2C+A">A. Di Pietro</a>, <a href="/search/nucl-ex?searchtype=author&query=Geraci%2C+E">E. Geraci</a>, <a href="/search/nucl-ex?searchtype=author&query=Grassi%2C+L">L. Grassi</a>, <a href="/search/nucl-ex?searchtype=author&query=Grzeszczuk%2C+A">A. Grzeszczuk</a>, <a href="/search/nucl-ex?searchtype=author&query=Figuera%2C+P">P. Figuera</a>, <a href="/search/nucl-ex?searchtype=author&query=La+Guidara%2C+E">E. La Guidara</a>, <a href="/search/nucl-ex?searchtype=author&query=Lanzalone%2C+G">G. Lanzalone</a>, <a href="/search/nucl-ex?searchtype=author&query=Neindre%2C+N+L">N. Le Neindre</a>, <a href="/search/nucl-ex?searchtype=author&query=Lombardo%2C+I">I. Lombardo</a>, <a href="/search/nucl-ex?searchtype=author&query=Maiolino%2C+C">C. Maiolino</a>, <a href="/search/nucl-ex?searchtype=author&query=Pagano%2C+A">A. Pagano</a>, <a href="/search/nucl-ex?searchtype=author&query=Pirrone%2C+S">S. Pirrone</a>, <a href="/search/nucl-ex?searchtype=author&query=Politi%2C+G">G. Politi</a> , et al. (7 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="0809.1196v1-abstract-short" style="display: inline;"> 40Ca+40,48Ca,46Ti reactions at 25 MeV/A have been studied using the 4p CHIMERA detector. An isospin effect on the competition between incomplete fusion and dissipative binary reaction mechanisms has been observed. The probability of producing a compound system is observed to be lower in the case of N=Z colliding systems as compared to the case of reactions induced on the more neutron rich 48Ca t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0809.1196v1-abstract-full').style.display = 'inline'; document.getElementById('0809.1196v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0809.1196v1-abstract-full" style="display: none;"> 40Ca+40,48Ca,46Ti reactions at 25 MeV/A have been studied using the 4p CHIMERA detector. An isospin effect on the competition between incomplete fusion and dissipative binary reaction mechanisms has been observed. The probability of producing a compound system is observed to be lower in the case of N=Z colliding systems as compared to the case of reactions induced on the more neutron rich 48Ca target. Predictions based on CoMD-II calculations show that the competition between fusion-like and dissipative reactions, for the selected centrality, can strongly constraint the parameterization of symmetry energy and its density dependence in the nuclear equation of state. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0809.1196v1-abstract-full').style.display = 'none'; document.getElementById('0809.1196v1-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 September, 2008; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2008. </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 submitted to phys.rew.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.102:112701,2009 </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 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