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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/2411.14620">arXiv:2411.14620</a> <span> [<a href="https://arxiv.org/pdf/2411.14620">pdf</a>, <a href="https://arxiv.org/format/2411.14620">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> </div> <p class="title is-5 mathjax"> Experimental Observation of Non-Exponential Auger-Meitner Decay of Inner-Shell-Excited CO </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Weller%2C+M">M. Weller</a>, <a href="/search/physics?searchtype=author&query=Kastirke%2C+G">G. Kastirke</a>, <a href="/search/physics?searchtype=author&query=Rist%2C+J">J. Rist</a>, <a href="/search/physics?searchtype=author&query=Goy%2C+C">C. Goy</a>, <a href="/search/physics?searchtype=author&query=Khan%2C+A">A. Khan</a>, <a href="/search/physics?searchtype=author&query=Kircher%2C+M">M. Kircher</a>, <a href="/search/physics?searchtype=author&query=Rauch%2C+C">C. Rauch</a>, <a href="/search/physics?searchtype=author&query=Schmidt%2C+L+P+H">L. Ph. H. Schmidt</a>, <a href="/search/physics?searchtype=author&query=Sisourat%2C+N">N. Sisourat</a>, <a href="/search/physics?searchtype=author&query=Sch%C3%B6ffler%2C+M+S">M. S. Sch枚ffler</a>, <a href="/search/physics?searchtype=author&query=D%C3%B6rner%2C+R">R. D枚rner</a>, <a href="/search/physics?searchtype=author&query=Trinter%2C+F">F. Trinter</a>, <a href="/search/physics?searchtype=author&query=Jahnke%2C+T">T. Jahnke</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="2411.14620v1-abstract-short" style="display: inline;"> Electronically excited atoms or molecules may deexcite by emission of a secondary electron through an Auger-Meitner decay. This deexcitation process is typically considered to be exponential in time. This is strictly speaking, however, only true for the case of an atom. Here, we present a study experimentally demonstrating the non-exponential time dependence of the decay of an inner-shell hole in… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.14620v1-abstract-full').style.display = 'inline'; document.getElementById('2411.14620v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2411.14620v1-abstract-full" style="display: none;"> Electronically excited atoms or molecules may deexcite by emission of a secondary electron through an Auger-Meitner decay. This deexcitation process is typically considered to be exponential in time. This is strictly speaking, however, only true for the case of an atom. Here, we present a study experimentally demonstrating the non-exponential time dependence of the decay of an inner-shell hole in a diatomic molecule. In addition, we provide an intuitive explanation for the origin of the observed variation of the molecular lifetimes and their dependence on the kinetic energy of the ionic fragments measured in coincidence with the photoelectrons. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.14620v1-abstract-full').style.display = 'none'; document.getElementById('2411.14620v1-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> 21 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">5 pages, 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/2411.09442">arXiv:2411.09442</a> <span> [<a href="https://arxiv.org/pdf/2411.09442">pdf</a>, <a href="https://arxiv.org/ps/2411.09442">ps</a>, <a href="https://arxiv.org/format/2411.09442">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</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.133.183002">10.1103/PhysRevLett.133.183002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Role of the Coulomb Potential in Compton Scattering </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Melzer%2C+N">N. Melzer</a>, <a href="/search/physics?searchtype=author&query=Kircher%2C+M">M. Kircher</a>, <a href="/search/physics?searchtype=author&query=Pier%2C+A">A. Pier</a>, <a href="/search/physics?searchtype=author&query=Kaiser%2C+L">L. Kaiser</a>, <a href="/search/physics?searchtype=author&query=Kruse%2C+J">J. Kruse</a>, <a href="/search/physics?searchtype=author&query=Anders%2C+N">N. Anders</a>, <a href="/search/physics?searchtype=author&query=Stindl%2C+J">J. Stindl</a>, <a href="/search/physics?searchtype=author&query=Sommerlad%2C+L">L. Sommerlad</a>, <a href="/search/physics?searchtype=author&query=McGinnis%2C+D">D. McGinnis</a>, <a href="/search/physics?searchtype=author&query=Schmidt%2C+M">M. Schmidt</a>, <a href="/search/physics?searchtype=author&query=Nowak%2C+L">L. Nowak</a>, <a href="/search/physics?searchtype=author&query=K%C3%BCgler%2C+A">A. K眉gler</a>, <a href="/search/physics?searchtype=author&query=Dwojak%2C+I">I. Dwojak</a>, <a href="/search/physics?searchtype=author&query=Drnec%2C+J">J. Drnec</a>, <a href="/search/physics?searchtype=author&query=Trinter%2C+F">F. Trinter</a>, <a href="/search/physics?searchtype=author&query=Sch%C3%B6ffler%2C+M+S">M. S. Sch枚ffler</a>, <a href="/search/physics?searchtype=author&query=Schmidt%2C+L+P">L. Ph. Schmidt</a>, <a href="/search/physics?searchtype=author&query=Novikovskiy%2C+N+M">N. M. Novikovskiy</a>, <a href="/search/physics?searchtype=author&query=Demekhin%2C+P+V">Ph. V. Demekhin</a>, <a href="/search/physics?searchtype=author&query=Jahnke%2C+T">T. Jahnke</a>, <a href="/search/physics?searchtype=author&query=D%C3%B6rner%2C+R">R. D枚rner</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="2411.09442v1-abstract-short" style="display: inline;"> We report a fully differential study of ionization of the Ne L-shell by Compton scattering of 20 keV photons. We find two physical mechanisms which modify the Compton-electron emission. Firstly, we observe scattering of the Compton electrons at their parent nucleus. Secondly, we find a distinct maximum in the electron momentum distribution close-to-zero momentum which we attribute to a focusing of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.09442v1-abstract-full').style.display = 'inline'; document.getElementById('2411.09442v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2411.09442v1-abstract-full" style="display: none;"> We report a fully differential study of ionization of the Ne L-shell by Compton scattering of 20 keV photons. We find two physical mechanisms which modify the Compton-electron emission. Firstly, we observe scattering of the Compton electrons at their parent nucleus. Secondly, we find a distinct maximum in the electron momentum distribution close-to-zero momentum which we attribute to a focusing of the electrons by the Coulomb potential. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.09442v1-abstract-full').style.display = 'none'; document.getElementById('2411.09442v1-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> 14 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">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> Physical Review Letters 133 (2024) 183002 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2110.09831">arXiv:2110.09831</a> <span> [<a href="https://arxiv.org/pdf/2110.09831">pdf</a>, <a href="https://arxiv.org/format/2110.09831">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</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.128.053001">10.1103/PhysRevLett.128.053001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Ion and Electron Momentum Distributions from Single and Double Ionization of Helium Induced by Compton Scattering </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kircher%2C+M">M. Kircher</a>, <a href="/search/physics?searchtype=author&query=Trinter%2C+F">F. Trinter</a>, <a href="/search/physics?searchtype=author&query=Grundmann%2C+S">S. Grundmann</a>, <a href="/search/physics?searchtype=author&query=Kastirke%2C+G">G. Kastirke</a>, <a href="/search/physics?searchtype=author&query=Weller%2C+M">M. Weller</a>, <a href="/search/physics?searchtype=author&query=Vela-Perez%2C+I">I. Vela-Perez</a>, <a href="/search/physics?searchtype=author&query=Khan%2C+A">A. Khan</a>, <a href="/search/physics?searchtype=author&query=Janke%2C+C">C. Janke</a>, <a href="/search/physics?searchtype=author&query=Waitz%2C+M">M. Waitz</a>, <a href="/search/physics?searchtype=author&query=Zeller%2C+S">S. Zeller</a>, <a href="/search/physics?searchtype=author&query=Mletzko%2C+T">T. Mletzko</a>, <a href="/search/physics?searchtype=author&query=Kirchner%2C+D">D. Kirchner</a>, <a href="/search/physics?searchtype=author&query=Honkim%C3%A4ki%2C+V">V. Honkim盲ki</a>, <a href="/search/physics?searchtype=author&query=Houamer%2C+S">S. Houamer</a>, <a href="/search/physics?searchtype=author&query=Chuluunbaatar%2C+O">O. Chuluunbaatar</a>, <a href="/search/physics?searchtype=author&query=Popov%2C+Y+V">Yu. V. Popov</a>, <a href="/search/physics?searchtype=author&query=Volobuev%2C+I+P">I. P. Volobuev</a>, <a href="/search/physics?searchtype=author&query=Sch%C3%B6ffler%2C+M+S">M. S. Sch枚ffler</a>, <a href="/search/physics?searchtype=author&query=Schmidt%2C+L+P+H">L. Ph. H. Schmidt</a>, <a href="/search/physics?searchtype=author&query=Jahnke%2C+T">T. Jahnke</a>, <a href="/search/physics?searchtype=author&query=D%C3%B6rner%2C+R">R. D枚rner</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="2110.09831v1-abstract-short" style="display: inline;"> We present the momentum distributions of the nucleus and of the electrons from double ionization of the helium atom by Compton scattering of photons with $h谓=40$ keV. We find that the doubly charged ion momentum distribution is very close to the Compton profile of the nucleus in the ground state of the helium atom, and the momentum distribution of the singly charged ion to give a precise image of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.09831v1-abstract-full').style.display = 'inline'; document.getElementById('2110.09831v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2110.09831v1-abstract-full" style="display: none;"> We present the momentum distributions of the nucleus and of the electrons from double ionization of the helium atom by Compton scattering of photons with $h谓=40$ keV. We find that the doubly charged ion momentum distribution is very close to the Compton profile of the nucleus in the ground state of the helium atom, and the momentum distribution of the singly charged ion to give a precise image of the electron Compton profile. To reproduce these results, non-relativistic calculations require the use of highly correlated initial- and final-state wavefunctions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.09831v1-abstract-full').style.display = 'none'; document.getElementById('2110.09831v1-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> 19 October, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 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> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 128, 053001 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2107.05994">arXiv:2107.05994</a> <span> [<a href="https://arxiv.org/pdf/2107.05994">pdf</a>, <a href="https://arxiv.org/format/2107.05994">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</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/s41467-021-26994-2">10.1038/s41467-021-26994-2 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measuring the photoelectron emission delay in the molecular frame </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Rist%2C+J">Jonas Rist</a>, <a href="/search/physics?searchtype=author&query=Klyssek%2C+K">Kim Klyssek</a>, <a href="/search/physics?searchtype=author&query=Novikovskiy%2C+N+M">Nikolay M. Novikovskiy</a>, <a href="/search/physics?searchtype=author&query=Kircher%2C+M">Max Kircher</a>, <a href="/search/physics?searchtype=author&query=Vela-P%C3%A9rez%2C+I">Isabel Vela-P茅rez</a>, <a href="/search/physics?searchtype=author&query=Trabert%2C+D">Daniel Trabert</a>, <a href="/search/physics?searchtype=author&query=Grundmann%2C+S">Sven Grundmann</a>, <a href="/search/physics?searchtype=author&query=Tsitsonis%2C+D">Dimitrios Tsitsonis</a>, <a href="/search/physics?searchtype=author&query=Siebert%2C+J">Juliane Siebert</a>, <a href="/search/physics?searchtype=author&query=Geyer%2C+A">Angelina Geyer</a>, <a href="/search/physics?searchtype=author&query=Melzer%2C+N">Niklas Melzer</a>, <a href="/search/physics?searchtype=author&query=Schwarz%2C+C">Christian Schwarz</a>, <a href="/search/physics?searchtype=author&query=Anders%2C+N">Nils Anders</a>, <a href="/search/physics?searchtype=author&query=Kaiser%2C+L">Leon Kaiser</a>, <a href="/search/physics?searchtype=author&query=Fehre%2C+K">Kilian Fehre</a>, <a href="/search/physics?searchtype=author&query=Hartung%2C+A">Alexander Hartung</a>, <a href="/search/physics?searchtype=author&query=Eckart%2C+S">Sebastian Eckart</a>, <a href="/search/physics?searchtype=author&query=Schmidt%2C+L+P+H">Lothar Ph. H. Schmidt</a>, <a href="/search/physics?searchtype=author&query=Sch%C3%B6ffler%2C+M+S">Markus S. Sch枚ffler</a>, <a href="/search/physics?searchtype=author&query=Davis%2C+V+T">Vernon T. Davis</a>, <a href="/search/physics?searchtype=author&query=Williams%2C+J+B">Joshua B. Williams</a>, <a href="/search/physics?searchtype=author&query=Trinter%2C+F">Florian Trinter</a>, <a href="/search/physics?searchtype=author&query=D%C3%B6rner%2C+R">Reinhard D枚rner</a>, <a href="/search/physics?searchtype=author&query=Demekhin%2C+P+V">Philipp V. Demekhin</a>, <a href="/search/physics?searchtype=author&query=Jahnke%2C+T">Till Jahnke</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="2107.05994v1-abstract-short" style="display: inline;"> If matter absorbs a photon of sufficient energy it emits an electron. The question of the duration of the emission process has intrigued scientists for decades. With the advent of attosecond metrology, experiments addressing such ultrashort intervals became possible. While these types of studies require attosecond experimental precision, we present here a novel measurement approach that avoids tho… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.05994v1-abstract-full').style.display = 'inline'; document.getElementById('2107.05994v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2107.05994v1-abstract-full" style="display: none;"> If matter absorbs a photon of sufficient energy it emits an electron. The question of the duration of the emission process has intrigued scientists for decades. With the advent of attosecond metrology, experiments addressing such ultrashort intervals became possible. While these types of studies require attosecond experimental precision, we present here a novel measurement approach that avoids those experimental difficulties. We instead extract the emission delay from the interference pattern generated as the emitted photoelectron is diffracted by the parent ion's potential. Targeting core electrons in CO, we measured a 2d map of photoelectron emission delays in the molecular frame over a wide range of electron energies. The measured emission times depend drastically on the emission direction and exhibit characteristic changes along the shape resonance of the molecule. Our approach can be routinely extended to other electron orbitals and more complex molecules. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.05994v1-abstract-full').style.display = 'none'; document.getElementById('2107.05994v1-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 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">Journal ref:</span> Nat Commun 12, 6657 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2106.14170">arXiv:2106.14170</a> <span> [<a href="https://arxiv.org/pdf/2106.14170">pdf</a>, <a href="https://arxiv.org/format/2106.14170">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic and Molecular Clusters">physics.atm-clus</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.127.103201">10.1103/PhysRevLett.127.103201 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Fourfold Differential Photoelectron Circular Dichroism </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Fehre%2C+K">K. Fehre</a>, <a href="/search/physics?searchtype=author&query=Novikovskiy%2C+N+M">N. M. Novikovskiy</a>, <a href="/search/physics?searchtype=author&query=Grundmann%2C+S">S. Grundmann</a>, <a href="/search/physics?searchtype=author&query=Kastirke%2C+G">G. Kastirke</a>, <a href="/search/physics?searchtype=author&query=Eckart%2C+S">S. Eckart</a>, <a href="/search/physics?searchtype=author&query=Trinter%2C+F">F. Trinter</a>, <a href="/search/physics?searchtype=author&query=Rist%2C+J">J. Rist</a>, <a href="/search/physics?searchtype=author&query=Hartung%2C+A">A. Hartung</a>, <a href="/search/physics?searchtype=author&query=Trabert%2C+D">D. Trabert</a>, <a href="/search/physics?searchtype=author&query=Janke%2C+C">C. Janke</a>, <a href="/search/physics?searchtype=author&query=Nalin%2C+G">G. Nalin</a>, <a href="/search/physics?searchtype=author&query=Pitzer%2C+M">M. Pitzer</a>, <a href="/search/physics?searchtype=author&query=Zeller%2C+S">S. Zeller</a>, <a href="/search/physics?searchtype=author&query=Wiegandt%2C+F">F. Wiegandt</a>, <a href="/search/physics?searchtype=author&query=Weller%2C+M">M. Weller</a>, <a href="/search/physics?searchtype=author&query=Kircher%2C+M">M. Kircher</a>, <a href="/search/physics?searchtype=author&query=Hofmann%2C+M">M. Hofmann</a>, <a href="/search/physics?searchtype=author&query=Schmidt%2C+L+P+H">L. Ph. H. Schmidt</a>, <a href="/search/physics?searchtype=author&query=Knie%2C+A">A. Knie</a>, <a href="/search/physics?searchtype=author&query=Hans%2C+A">A. Hans</a>, <a href="/search/physics?searchtype=author&query=Ltaief%2C+L+B">L. Ben Ltaief</a>, <a href="/search/physics?searchtype=author&query=Ehresmann%2C+A">A. Ehresmann</a>, <a href="/search/physics?searchtype=author&query=Berger%2C+R">R. Berger</a>, <a href="/search/physics?searchtype=author&query=Fukuzawa%2C+H">H. Fukuzawa</a>, <a href="/search/physics?searchtype=author&query=Ueda%2C+K">K. Ueda</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="2106.14170v1-abstract-short" style="display: inline;"> We report on a joint experimental and theoretical study of photoelectron circular dichroism (PECD) in methyloxirane. By detecting O 1s-photoelectrons in coincidence with fragment ions, we deduce the molecule's orientation and photoelectron emission direction in the laboratory frame. Thereby, we retrieve a fourfold differential PECD clearly beyond 50%. This strong chiral asymmetry is reproduced by… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2106.14170v1-abstract-full').style.display = 'inline'; document.getElementById('2106.14170v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2106.14170v1-abstract-full" style="display: none;"> We report on a joint experimental and theoretical study of photoelectron circular dichroism (PECD) in methyloxirane. By detecting O 1s-photoelectrons in coincidence with fragment ions, we deduce the molecule's orientation and photoelectron emission direction in the laboratory frame. Thereby, we retrieve a fourfold differential PECD clearly beyond 50%. This strong chiral asymmetry is reproduced by ab initio electronic structure calculations. Providing such a pronounced contrast makes PECD of fixed-in-space chiral molecules an even more sensitive tool for chiral recognition in the gas phase. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2106.14170v1-abstract-full').style.display = 'none'; document.getElementById('2106.14170v1-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 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">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. Lett. 127, 103201 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2106.08071">arXiv:2106.08071</a> <span> [<a href="https://arxiv.org/pdf/2106.08071">pdf</a>, <a href="https://arxiv.org/format/2106.08071">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic and Molecular Clusters">physics.atm-clus</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/10.1039/D1CP02462K">10.1039/D1CP02462K <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Photoelectron circular dichroism of O 1$s$-photoelectrons of uniaxially oriented trifluoromethyloxirane: Energy dependence and sensitivity to molecular configuration </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Nalin%2C+G">G. Nalin</a>, <a href="/search/physics?searchtype=author&query=Fehre%2C+K">K. Fehre</a>, <a href="/search/physics?searchtype=author&query=Trinter%2C+F">F. Trinter</a>, <a href="/search/physics?searchtype=author&query=Novikovskiy%2C+N+M">N. M. Novikovskiy</a>, <a href="/search/physics?searchtype=author&query=Anders%2C+N">N. Anders</a>, <a href="/search/physics?searchtype=author&query=Trabert%2C+D">D. Trabert</a>, <a href="/search/physics?searchtype=author&query=Grundmann%2C+S">S. Grundmann</a>, <a href="/search/physics?searchtype=author&query=Kircher%2C+M">M. Kircher</a>, <a href="/search/physics?searchtype=author&query=Khan%2C+A">A. Khan</a>, <a href="/search/physics?searchtype=author&query=Tomar%2C+R">R. Tomar</a>, <a href="/search/physics?searchtype=author&query=Hofmann%2C+M">M. Hofmann</a>, <a href="/search/physics?searchtype=author&query=Waitz%2C+M">M. Waitz</a>, <a href="/search/physics?searchtype=author&query=Vela-Perez%2C+I">I. Vela-Perez</a>, <a href="/search/physics?searchtype=author&query=Fukuzawa%2C+H">H. Fukuzawa</a>, <a href="/search/physics?searchtype=author&query=Ueda%2C+K">K. Ueda</a>, <a href="/search/physics?searchtype=author&query=Williams%2C+J">J. Williams</a>, <a href="/search/physics?searchtype=author&query=Kargin%2C+D">D. Kargin</a>, <a href="/search/physics?searchtype=author&query=Maurer%2C+M">M. Maurer</a>, <a href="/search/physics?searchtype=author&query=K%C3%BCstner-Wetekam%2C+C">C. K眉stner-Wetekam</a>, <a href="/search/physics?searchtype=author&query=Marder%2C+L">L. Marder</a>, <a href="/search/physics?searchtype=author&query=Viehmann%2C+J">J. Viehmann</a>, <a href="/search/physics?searchtype=author&query=Knie%2C+A">A. Knie</a>, <a href="/search/physics?searchtype=author&query=Jahnke%2C+T">T. Jahnke</a>, <a href="/search/physics?searchtype=author&query=Ilchen%2C+M">M. Ilchen</a>, <a href="/search/physics?searchtype=author&query=D%C3%B6rner%2C+R">R. D枚rner</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="2106.08071v1-abstract-short" style="display: inline;"> The photoelectron circular dichroism (PECD) of the O 1s-photoelectrons of trifluoromethyloxirane(TFMOx) is studied experimentally and theoretically for different photoelectron kinetic energies. The experiments were performed employing circularly polarized synchrotron radiation and coincidentelectron and fragment ion detection using Cold Target Recoil Ion Momentum Spectroscopy. The corresponding ca… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2106.08071v1-abstract-full').style.display = 'inline'; document.getElementById('2106.08071v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2106.08071v1-abstract-full" style="display: none;"> The photoelectron circular dichroism (PECD) of the O 1s-photoelectrons of trifluoromethyloxirane(TFMOx) is studied experimentally and theoretically for different photoelectron kinetic energies. The experiments were performed employing circularly polarized synchrotron radiation and coincidentelectron and fragment ion detection using Cold Target Recoil Ion Momentum Spectroscopy. The corresponding calculations were performed by means of the Single Center method within the relaxed-core Hartree-Fock approximation. We concentrate on the energy dependence of the differential PECD of uniaxially oriented TFMOx molecules, which is accessible through the employed coincident detection. We also compare results for differential PECD of TFMOx to those obtained for the equivalent fragmentation channel and similar photoelectron kinetic energy of methyloxirane (MOx), studied in our previous work. Thereby, we investigate the influence of the substitution of the methyl-group by the trifluoromethyl-group at the chiral center on the molecular chiral response. Finally, the presently obtained angular distribution parameters are compared to those available in literature. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2106.08071v1-abstract-full').style.display = 'none'; document.getElementById('2106.08071v1-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 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">6 figs</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Chem. Chem. Phys. 23, 17248 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2105.11897">arXiv:2105.11897</a> <span> [<a href="https://arxiv.org/pdf/2105.11897">pdf</a>, <a href="https://arxiv.org/format/2105.11897">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</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/10.1039/D2CP05942H">10.1039/D2CP05942H <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> High-Energy Molecular-Frame Photoelectron Angular Distributions: A Molecular Bond-Length Ruler </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Vela-Per%C3%A9z%2C+I">Isabel Vela-Per茅z</a>, <a href="/search/physics?searchtype=author&query=Ota%2C+F">Fukiko Ota</a>, <a href="/search/physics?searchtype=author&query=Mhamdi%2C+A">Abir Mhamdi</a>, <a href="/search/physics?searchtype=author&query=Tamura%2C+Y">Yoshiaki Tamura</a>, <a href="/search/physics?searchtype=author&query=Rist%2C+J">Jonas Rist</a>, <a href="/search/physics?searchtype=author&query=Melzer%2C+N">Niklas Melzer</a>, <a href="/search/physics?searchtype=author&query=Uerken%2C+S">Safak Uerken</a>, <a href="/search/physics?searchtype=author&query=Nalin%2C+G">Giammarco Nalin</a>, <a href="/search/physics?searchtype=author&query=Anders%2C+N">Nils Anders</a>, <a href="/search/physics?searchtype=author&query=You%2C+D">Daehyun You</a>, <a href="/search/physics?searchtype=author&query=Kircher%2C+M">Max Kircher</a>, <a href="/search/physics?searchtype=author&query=Janke%2C+C">Christian Janke</a>, <a href="/search/physics?searchtype=author&query=Waitz%2C+M">Markus Waitz</a>, <a href="/search/physics?searchtype=author&query=Trinter%2C+F">Florian Trinter</a>, <a href="/search/physics?searchtype=author&query=Guillemin%2C+R">Renaud Guillemin</a>, <a href="/search/physics?searchtype=author&query=Piancastelli%2C+M+N">Maria Novella Piancastelli</a>, <a href="/search/physics?searchtype=author&query=Simon%2C+M">Marc Simon</a>, <a href="/search/physics?searchtype=author&query=Davis%2C+V+T">Vernon T. Davis</a>, <a href="/search/physics?searchtype=author&query=Williams%2C+J+B">Joshua B. Williams</a>, <a href="/search/physics?searchtype=author&query=D%C3%B6rner%2C+R">Reinhard D枚rner</a>, <a href="/search/physics?searchtype=author&query=Hatada%2C+K">Keisuke Hatada</a>, <a href="/search/physics?searchtype=author&query=Yamazaki%2C+K">Kaoru Yamazaki</a>, <a href="/search/physics?searchtype=author&query=Fehre%2C+K">Kilian Fehre</a>, <a href="/search/physics?searchtype=author&query=Demekhin%2C+P+V">Philipp V. Demekhin</a>, <a href="/search/physics?searchtype=author&query=Ueda%2C+K">Kiyoshi Ueda</a> , et al. (2 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="2105.11897v1-abstract-short" style="display: inline;"> We present an experimental and theoretical study of core-level ionization of small hetero- and homo-nuclear molecules employing circularly polarized light and address molecular-frame photoelectron angular distributions in the light's polarization plane (CP-MFPADs). We find that the main forward-scattering peaks of CP-MFPADs are slightly tilted with respect to the molecular axis. We show that this… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.11897v1-abstract-full').style.display = 'inline'; document.getElementById('2105.11897v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2105.11897v1-abstract-full" style="display: none;"> We present an experimental and theoretical study of core-level ionization of small hetero- and homo-nuclear molecules employing circularly polarized light and address molecular-frame photoelectron angular distributions in the light's polarization plane (CP-MFPADs). We find that the main forward-scattering peaks of CP-MFPADs are slightly tilted with respect to the molecular axis. We show that this tilt angle can be directly connected to the molecular bond length by a simple, universal formula. The extraction of the bond length becomes more accurate as the photoelectron energy is increased. We apply the derived formula to several examples of CP-MFPADs of C 1s and O 1s photoelectrons of CO, which have been measured experimentally or obtained by means of ab initio modeling. The photoelectron kinetic energies range from 70 to 1000~eV and the extracted bond lengths agree well with the known bond length of the CO molecule in its ground state. In addition, we discuss the influence of the back-scattering contribution that is superimposed over the analyzed forward-scattering peak in case of homo-nuclear diatomic molecules as N$_2$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.11897v1-abstract-full').style.display = 'none'; document.getElementById('2105.11897v1-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 May, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Chem. Chem. Phys., 2023, 25, 13784-13791 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2105.02028">arXiv:2105.02028</a> <span> [<a href="https://arxiv.org/pdf/2105.02028">pdf</a>, <a href="https://arxiv.org/format/2105.02028">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</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.123.193001">10.1103/PhysRevLett.123.193001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Photon-momentum-induced molecular dynamics in photoionization of N$_2$ at $h谓=40$ keV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kircher%2C+M">M. Kircher</a>, <a href="/search/physics?searchtype=author&query=Rist%2C+J">J. Rist</a>, <a href="/search/physics?searchtype=author&query=Trinter%2C+F">F. Trinter</a>, <a href="/search/physics?searchtype=author&query=Grundmann%2C+S">S. Grundmann</a>, <a href="/search/physics?searchtype=author&query=Waitz%2C+M">M. Waitz</a>, <a href="/search/physics?searchtype=author&query=Melzer%2C+N">N. Melzer</a>, <a href="/search/physics?searchtype=author&query=Vela-Perez%2C+I">I. Vela-Perez</a>, <a href="/search/physics?searchtype=author&query=Mletzko%2C+T">T. Mletzko</a>, <a href="/search/physics?searchtype=author&query=Pier%2C+A">A. Pier</a>, <a href="/search/physics?searchtype=author&query=Strenger%2C+N">N. Strenger</a>, <a href="/search/physics?searchtype=author&query=Siebert%2C+J">J. Siebert</a>, <a href="/search/physics?searchtype=author&query=Janssen%2C+R">R. Janssen</a>, <a href="/search/physics?searchtype=author&query=Honkim%C3%A4ki%2C+V">V. Honkim盲ki</a>, <a href="/search/physics?searchtype=author&query=Drnec%2C+J">J. Drnec</a>, <a href="/search/physics?searchtype=author&query=Demekhin%2C+P+V">Ph. V. Demekhin</a>, <a href="/search/physics?searchtype=author&query=Schmidt%2C+L+P+H">L. Ph. H. Schmidt</a>, <a href="/search/physics?searchtype=author&query=Sch%C3%B6ffler%2C+M+S">M. S. Sch枚ffler</a>, <a href="/search/physics?searchtype=author&query=Jahnke%2C+T">T. Jahnke</a>, <a href="/search/physics?searchtype=author&query=D%C3%B6rner%2C+R">R. D枚rner</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="2105.02028v1-abstract-short" style="display: inline;"> We investigate K-shell ionization of N$_2$ at 40 keV photon energy. Using a COLTRIMS reaction microscope we determine the vector momenta of the photoelectron, the Auger electron and both N$^+$ fragments. These fully differential data show that the dissociation process of the N$_2^{2+}$ ion is significantly modified not only by the recoil momentum of the photoelectron, but also by the photon moment… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.02028v1-abstract-full').style.display = 'inline'; document.getElementById('2105.02028v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2105.02028v1-abstract-full" style="display: none;"> We investigate K-shell ionization of N$_2$ at 40 keV photon energy. Using a COLTRIMS reaction microscope we determine the vector momenta of the photoelectron, the Auger electron and both N$^+$ fragments. These fully differential data show that the dissociation process of the N$_2^{2+}$ ion is significantly modified not only by the recoil momentum of the photoelectron, but also by the photon momentum and the momentum of the emitted Auger electron. We find that the recoil energy introduced by the photon and the photoelectron momentum is partitioned with a ratio of approximately 30/70 between the Auger electron and fragment ion kinetic energies, respectively. We also observe that the photon momentum induces an additional rotation of the molecular ion. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.02028v1-abstract-full').style.display = 'none'; document.getElementById('2105.02028v1-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 May, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 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, 2 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 123, 193001 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2105.01955">arXiv:2105.01955</a> <span> [<a href="https://arxiv.org/pdf/2105.01955">pdf</a>, <a href="https://arxiv.org/format/2105.01955">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</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.123.243201">10.1103/PhysRevLett.123.243201 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Recoil-Induced Asymmetry of Nondipole Molecular Frame Photoelectron Angular Distributions in the Hard X-ray Regime </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kircher%2C+M">M. Kircher</a>, <a href="/search/physics?searchtype=author&query=Rist%2C+J">J. Rist</a>, <a href="/search/physics?searchtype=author&query=Trinter%2C+F">F. Trinter</a>, <a href="/search/physics?searchtype=author&query=Grundmann%2C+S">S. Grundmann</a>, <a href="/search/physics?searchtype=author&query=Waitz%2C+M">M. Waitz</a>, <a href="/search/physics?searchtype=author&query=Melzer%2C+N">N. Melzer</a>, <a href="/search/physics?searchtype=author&query=Vela-Perez%2C+I">I. Vela-Perez</a>, <a href="/search/physics?searchtype=author&query=Mletzko%2C+T">T. Mletzko</a>, <a href="/search/physics?searchtype=author&query=Pier%2C+A">A. Pier</a>, <a href="/search/physics?searchtype=author&query=Strenger%2C+N">N. Strenger</a>, <a href="/search/physics?searchtype=author&query=Siebert%2C+J">J. Siebert</a>, <a href="/search/physics?searchtype=author&query=Janssen%2C+R">R. Janssen</a>, <a href="/search/physics?searchtype=author&query=Schmidt%2C+L+P+H">L. Ph. H. Schmidt</a>, <a href="/search/physics?searchtype=author&query=Artemyev%2C+A+N">A. N. Artemyev</a>, <a href="/search/physics?searchtype=author&query=Sch%C3%B6ffler%2C+M+S">M. S. Sch枚ffler</a>, <a href="/search/physics?searchtype=author&query=Jahnke%2C+T">T. Jahnke</a>, <a href="/search/physics?searchtype=author&query=D%C3%B6rner%2C+R">R. D枚rner</a>, <a href="/search/physics?searchtype=author&query=Demekhin%2C+P+V">Ph. V. Demekhin</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="2105.01955v1-abstract-short" style="display: inline;"> We investigate angular emission distributions of the 1s-photoelectrons of N$_2$ ionized by linearly polarized synchrotron radiation at $h 谓=40$ keV. As expected, nondipole contributions cause a very strong forward-backward asymmetry in the measured emission distributions. In addition, we observe an unexpected asymmetry with respect to the polarization direction, which depends on the direction of t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.01955v1-abstract-full').style.display = 'inline'; document.getElementById('2105.01955v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2105.01955v1-abstract-full" style="display: none;"> We investigate angular emission distributions of the 1s-photoelectrons of N$_2$ ionized by linearly polarized synchrotron radiation at $h 谓=40$ keV. As expected, nondipole contributions cause a very strong forward-backward asymmetry in the measured emission distributions. In addition, we observe an unexpected asymmetry with respect to the polarization direction, which depends on the direction of the molecular fragmentation. In particular, photoelectrons are predominantly emitted in the direction of the forward nitrogen atom. This observation cannot be explained via asymmetries introduced by the initial bound and final continuum electronic states of the oriented molecule. The present simulations assign this asymmetry to a novel nontrivial effect of the recoil imposed to the nuclei by the fast photoelectrons and high-energy photons, which results in a propensity for the ions to break up along the axis of the recoil momentum. The results are of particular importance for the interpretation of future experiments at XFELs operating in the few tens of keV regime, where such nondipole and recoil effects will be essential. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.01955v1-abstract-full').style.display = 'none'; document.getElementById('2105.01955v1-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 May, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 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">6 pages, 2 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 123, 243201 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2101.03375">arXiv:2101.03375</a> <span> [<a href="https://arxiv.org/pdf/2101.03375">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</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/10.1039/D2CP03090J">10.1039/D2CP03090J <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A new route for enantio-sensitive structure determination by photoelectron scattering on molecules in the gas phase </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Fehre%2C+K">K. Fehre</a>, <a href="/search/physics?searchtype=author&query=Novikovskiy%2C+N+M">N. M. Novikovskiy</a>, <a href="/search/physics?searchtype=author&query=Grundmann%2C+S">S. Grundmann</a>, <a href="/search/physics?searchtype=author&query=Kastirke%2C+G">G. Kastirke</a>, <a href="/search/physics?searchtype=author&query=Eckart%2C+S">S. Eckart</a>, <a href="/search/physics?searchtype=author&query=Trinter%2C+F">F. Trinter</a>, <a href="/search/physics?searchtype=author&query=Rist%2C+J">J. Rist</a>, <a href="/search/physics?searchtype=author&query=Hartung%2C+A">A. Hartung</a>, <a href="/search/physics?searchtype=author&query=Trabert%2C+D">D. Trabert</a>, <a href="/search/physics?searchtype=author&query=Janke%2C+C">Ch. Janke</a>, <a href="/search/physics?searchtype=author&query=Pitzer%2C+M">M. Pitzer</a>, <a href="/search/physics?searchtype=author&query=Zeller%2C+S">S. Zeller</a>, <a href="/search/physics?searchtype=author&query=Wiegandt%2C+F">F. Wiegandt</a>, <a href="/search/physics?searchtype=author&query=Weller%2C+M">M. Weller</a>, <a href="/search/physics?searchtype=author&query=Kircher%2C+M">M. Kircher</a>, <a href="/search/physics?searchtype=author&query=Nalin%2C+G">G. Nalin</a>, <a href="/search/physics?searchtype=author&query=Hofmann%2C+M">M. Hofmann</a>, <a href="/search/physics?searchtype=author&query=Schmidt%2C+L+P+H">L. Ph. H. Schmidt</a>, <a href="/search/physics?searchtype=author&query=Knie%2C+A">A. Knie</a>, <a href="/search/physics?searchtype=author&query=Hans%2C+A">A. Hans</a>, <a href="/search/physics?searchtype=author&query=Ltaief%2C+L+B">L. Ben Ltaief</a>, <a href="/search/physics?searchtype=author&query=Ehresmann%2C+A">A. Ehresmann</a>, <a href="/search/physics?searchtype=author&query=Berger%2C+R">R. Berger</a>, <a href="/search/physics?searchtype=author&query=Fukuzawa%2C+H">H. Fukuzawa</a>, <a href="/search/physics?searchtype=author&query=Ueda%2C+K">K. Ueda</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="2101.03375v2-abstract-short" style="display: inline;"> X-ray as well as electron diffraction are powerful tools for structure determination of molecules. Studies on randomly oriented molecules in the gas-phase address cases in which molecular crystals cannot be generated or the interaction-free molecular structure is to be addressed. Such studies usually yield partial geometrical information, such as interatomic distances. Here, we present a complemen… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.03375v2-abstract-full').style.display = 'inline'; document.getElementById('2101.03375v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2101.03375v2-abstract-full" style="display: none;"> X-ray as well as electron diffraction are powerful tools for structure determination of molecules. Studies on randomly oriented molecules in the gas-phase address cases in which molecular crystals cannot be generated or the interaction-free molecular structure is to be addressed. Such studies usually yield partial geometrical information, such as interatomic distances. Here, we present a complementary approach, which allows obtaining insight to the structure, handedness and even detailed geometrical features of molecules in the gas phase. Our approach combines Coulomb explosion imaging, the information that is encoded in the molecular frame diffraction pattern of core-shell photoelectrons and ab initio computations. Using a loop-like analysis scheme we are able to deduce specific molecular coordinates with sensitivity even to the handedness of chiral molecules and the positions of individual atoms, as, e.g., protons. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.03375v2-abstract-full').style.display = 'none'; document.getElementById('2101.03375v2-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 January, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 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">13 pages, 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Chem. Chem. Phys. 24, 26458-26465 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2010.08298">arXiv:2010.08298</a> <span> [<a href="https://arxiv.org/pdf/2010.08298">pdf</a>, <a href="https://arxiv.org/format/2010.08298">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</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/10.1126/science.abb9318">10.1126/science.abb9318 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Zeptosecond Birth Time Delay in Molecular Photoionization </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Grundmann%2C+S">Sven Grundmann</a>, <a href="/search/physics?searchtype=author&query=Trabert%2C+D">Daniel Trabert</a>, <a href="/search/physics?searchtype=author&query=Fehre%2C+K">Kilian Fehre</a>, <a href="/search/physics?searchtype=author&query=Strenger%2C+N">Nico Strenger</a>, <a href="/search/physics?searchtype=author&query=Pier%2C+A">Andreas Pier</a>, <a href="/search/physics?searchtype=author&query=Kaiser%2C+L">Leon Kaiser</a>, <a href="/search/physics?searchtype=author&query=Kircher%2C+M">Max Kircher</a>, <a href="/search/physics?searchtype=author&query=Weller%2C+M">Miriam Weller</a>, <a href="/search/physics?searchtype=author&query=Eckart%2C+S">Sebastian Eckart</a>, <a href="/search/physics?searchtype=author&query=Schmidt%2C+L+P+H">Lothar Ph. H. Schmidt</a>, <a href="/search/physics?searchtype=author&query=Trinter%2C+F">Florian Trinter</a>, <a href="/search/physics?searchtype=author&query=Jahnke%2C+T">Till Jahnke</a>, <a href="/search/physics?searchtype=author&query=Sch%C3%B6ffler%2C+M+S">Markus S. Sch枚ffler</a>, <a href="/search/physics?searchtype=author&query=D%C3%B6rner%2C+R">Reinhard D枚rner</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="2010.08298v1-abstract-short" style="display: inline;"> Photoionization is one of the fundamental light-matter interaction processes in which the absorption of a photon launches the escape of an electron. The time scale of the process poses many open questions. Experiments found time delays in the attosecond ($10^{-18}$ s) domain between electron ejection from different orbitals, electronic bands, or in different directions. Here, we demonstrate that a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.08298v1-abstract-full').style.display = 'inline'; document.getElementById('2010.08298v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2010.08298v1-abstract-full" style="display: none;"> Photoionization is one of the fundamental light-matter interaction processes in which the absorption of a photon launches the escape of an electron. The time scale of the process poses many open questions. Experiments found time delays in the attosecond ($10^{-18}$ s) domain between electron ejection from different orbitals, electronic bands, or in different directions. Here, we demonstrate that across a molecular orbital the electron is not launched at the same time. The birth time rather depends on the travel time of the photon across the molecule, which is 247 zeptoseconds ($10^{-21}$ s) for the average bond length of H$_2$. Using an electron interferometric technique, we resolve this birth time delay between electron emission from the two centers of the hydrogen molecule. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.08298v1-abstract-full').style.display = 'none'; document.getElementById('2010.08298v1-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 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> Science 16 Oct 2020: Vol. 370, Issue 6514, pp. 339-341 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2005.03956">arXiv:2005.03956</a> <span> [<a href="https://arxiv.org/pdf/2005.03956">pdf</a>, <a href="https://arxiv.org/format/2005.03956">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</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/PhysRevResearch.2.033209">10.1103/PhysRevResearch.2.033209 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Chiral photoelectron angular distributions from ionization of achiral atomic and molecular species </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Pier%2C+A">Andreas Pier</a>, <a href="/search/physics?searchtype=author&query=Fehre%2C+K">Kilian Fehre</a>, <a href="/search/physics?searchtype=author&query=Grundmann%2C+S">Sven Grundmann</a>, <a href="/search/physics?searchtype=author&query=Vela-Perez%2C+I">Isabel Vela-Perez</a>, <a href="/search/physics?searchtype=author&query=Strenger%2C+N">Nico Strenger</a>, <a href="/search/physics?searchtype=author&query=Kircher%2C+M">Max Kircher</a>, <a href="/search/physics?searchtype=author&query=Tsitsonis%2C+D">Dimitrios Tsitsonis</a>, <a href="/search/physics?searchtype=author&query=Williams%2C+J+B">Joshua B. Williams</a>, <a href="/search/physics?searchtype=author&query=Senftleben%2C+A">Arne Senftleben</a>, <a href="/search/physics?searchtype=author&query=Baumert%2C+T">Thomas Baumert</a>, <a href="/search/physics?searchtype=author&query=Sch%C3%B6ffler%2C+M+S">Markus S. Sch枚ffler</a>, <a href="/search/physics?searchtype=author&query=Demekhin%2C+P+V">Philipp V. Demekhin</a>, <a href="/search/physics?searchtype=author&query=Trinter%2C+F">Florian Trinter</a>, <a href="/search/physics?searchtype=author&query=Jahnke%2C+T">Till Jahnke</a>, <a href="/search/physics?searchtype=author&query=D%C3%B6rner%2C+R">Reinhard D枚rner</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="2005.03956v1-abstract-short" style="display: inline;"> We show that the combination of two achiral components - atomic or molecular target plus a circularly polarized photon - can yield chirally structured photoelectron angular distributions. For photoionization of CO, the angular distribution of carbon K-shell photoelectrons is chiral when the molecular axis is neither perpendicular nor (anti-)parallel to the light propagation axis. In photo-double-i… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.03956v1-abstract-full').style.display = 'inline'; document.getElementById('2005.03956v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2005.03956v1-abstract-full" style="display: none;"> We show that the combination of two achiral components - atomic or molecular target plus a circularly polarized photon - can yield chirally structured photoelectron angular distributions. For photoionization of CO, the angular distribution of carbon K-shell photoelectrons is chiral when the molecular axis is neither perpendicular nor (anti-)parallel to the light propagation axis. In photo-double-ionization of He, the distribution of one electron is chiral, if the other electron is oriented like the molecular axis in the former case and if the electrons are distinguishable by their energy. In both scenarios, the circularly polarized photon defines a plane with a sense of rotation and an additional axis is defined by the CO molecule or one electron. This is sufficient to establish an unambiguous coordinate frame of well-defined handedness. To produce a chirally structured electron angular distribution, such a coordinate frame is necessary, but not sufficient. We show that additional electron-electron interaction or scattering processes are needed to create the chiral angular distribution. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.03956v1-abstract-full').style.display = 'none'; document.getElementById('2005.03956v1-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 May, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Research 2, 033209 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2003.10706">arXiv:2003.10706</a> <span> [<a href="https://arxiv.org/pdf/2003.10706">pdf</a>, <a href="https://arxiv.org/format/2003.10706">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</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.124.233201">10.1103/PhysRevLett.124.233201 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Observation of Photoion Backward Emission in Photoionization of He and N2 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Grundmann%2C+S">Sven Grundmann</a>, <a href="/search/physics?searchtype=author&query=Kircher%2C+M">Max Kircher</a>, <a href="/search/physics?searchtype=author&query=Vela-Perez%2C+I">Isabel Vela-Perez</a>, <a href="/search/physics?searchtype=author&query=Nalin%2C+G">Giammarco Nalin</a>, <a href="/search/physics?searchtype=author&query=Trabert%2C+D">Daniel Trabert</a>, <a href="/search/physics?searchtype=author&query=Anders%2C+N">Nils Anders</a>, <a href="/search/physics?searchtype=author&query=Melzer%2C+N">Niklas Melzer</a>, <a href="/search/physics?searchtype=author&query=Rist%2C+J">Jonas Rist</a>, <a href="/search/physics?searchtype=author&query=Pier%2C+A">Andreas Pier</a>, <a href="/search/physics?searchtype=author&query=Strenger%2C+N">Nico Strenger</a>, <a href="/search/physics?searchtype=author&query=Siebert%2C+J">Juliane Siebert</a>, <a href="/search/physics?searchtype=author&query=Demekhin%2C+P+V">Philipp V. Demekhin</a>, <a href="/search/physics?searchtype=author&query=Schmidt%2C+L+P+H">Lothar Ph. H. Schmidt</a>, <a href="/search/physics?searchtype=author&query=Trinter%2C+F">Florian Trinter</a>, <a href="/search/physics?searchtype=author&query=Schoeffler%2C+M+S">Markus S. Schoeffler</a>, <a href="/search/physics?searchtype=author&query=Jahnke%2C+T">Till Jahnke</a>, <a href="/search/physics?searchtype=author&query=Doerner%2C+R">Reinhard Doerner</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="2003.10706v1-abstract-short" style="display: inline;"> We experimentally investigate the effects of the linear photon momentum on the momentum distributions of photoions and photoelectrons generated in one-photon ionization in an energy range of 300 eV $\leq~E_纬~\leq$ 40 keV. Our results show that for each ionization event the photon momentum is imparted onto the photoion, which is essentially the system's center of mass. Nevertheless, the mean value… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.10706v1-abstract-full').style.display = 'inline'; document.getElementById('2003.10706v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2003.10706v1-abstract-full" style="display: none;"> We experimentally investigate the effects of the linear photon momentum on the momentum distributions of photoions and photoelectrons generated in one-photon ionization in an energy range of 300 eV $\leq~E_纬~\leq$ 40 keV. Our results show that for each ionization event the photon momentum is imparted onto the photoion, which is essentially the system's center of mass. Nevertheless, the mean value of the ion momentum distribution along the light propagation direction is backward-directed by $-3/5$ times the photon momentum. These results experimentally confirm a 90 year old prediction. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.10706v1-abstract-full').style.display = 'none'; document.getElementById('2003.10706v1-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 March, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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">5 pages, 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 124, 233201 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2001.07713">arXiv:2001.07713</a> <span> [<a href="https://arxiv.org/pdf/2001.07713">pdf</a>, <a href="https://arxiv.org/format/2001.07713">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</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/PhysRevResearch.2.033080">10.1103/PhysRevResearch.2.033080 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Revealing the Two-Electron Cusp in the Ground States of He and H2 via Quasifree Double Photoionization </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Grundmann%2C+S">S. Grundmann</a>, <a href="/search/physics?searchtype=author&query=Serov%2C+V">V. Serov</a>, <a href="/search/physics?searchtype=author&query=Trinter%2C+F">F. Trinter</a>, <a href="/search/physics?searchtype=author&query=Fehre%2C+K">K. Fehre</a>, <a href="/search/physics?searchtype=author&query=Strenger%2C+N">N. Strenger</a>, <a href="/search/physics?searchtype=author&query=Pier%2C+A">A. Pier</a>, <a href="/search/physics?searchtype=author&query=Kircher%2C+M">M. Kircher</a>, <a href="/search/physics?searchtype=author&query=Trabert%2C+D">D. Trabert</a>, <a href="/search/physics?searchtype=author&query=Weller%2C+M">M. Weller</a>, <a href="/search/physics?searchtype=author&query=Rist%2C+J">J. Rist</a>, <a href="/search/physics?searchtype=author&query=Kaiser%2C+L">L. Kaiser</a>, <a href="/search/physics?searchtype=author&query=Bray%2C+A+W">A. W. Bray</a>, <a href="/search/physics?searchtype=author&query=Schmidt%2C+L+P+H">L. Ph. H. Schmidt</a>, <a href="/search/physics?searchtype=author&query=Williams%2C+J+B">J. B. Williams</a>, <a href="/search/physics?searchtype=author&query=Jahnke%2C+T">T. Jahnke</a>, <a href="/search/physics?searchtype=author&query=D%C3%B6rner%2C+R">R. D枚rner</a>, <a href="/search/physics?searchtype=author&query=Sch%C3%B6ffler%2C+M+S">M. S. Sch枚ffler</a>, <a href="/search/physics?searchtype=author&query=Kheifets%2C+A+S">A. S. Kheifets</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="2001.07713v2-abstract-short" style="display: inline;"> We report on kinematically complete measurements and ab initio non-perturbative calculations of double ionization of He and H2 by a single 800 eV circularly polarized photon. We confirm the quasifree mechanism of photoionization for H2 and show how it originates from the two-electron cusp in the ground state of a two-electron target. Our approach establishes a new method for mapping electrons rela… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2001.07713v2-abstract-full').style.display = 'inline'; document.getElementById('2001.07713v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2001.07713v2-abstract-full" style="display: none;"> We report on kinematically complete measurements and ab initio non-perturbative calculations of double ionization of He and H2 by a single 800 eV circularly polarized photon. We confirm the quasifree mechanism of photoionization for H2 and show how it originates from the two-electron cusp in the ground state of a two-electron target. Our approach establishes a new method for mapping electrons relative to each other and provides valuable insight into photoionization beyond the electric-dipole approximation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2001.07713v2-abstract-full').style.display = 'none'; document.getElementById('2001.07713v2-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, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 January, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 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">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. Research 2, 033080 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1911.04780">arXiv:1911.04780</a> <span> [<a href="https://arxiv.org/pdf/1911.04780">pdf</a>, <a href="https://arxiv.org/format/1911.04780">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</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/s41567-020-0880-2">10.1038/s41567-020-0880-2 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Kinematically complete experimental study of Compton scattering at helium atoms near the ionization threshold </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kircher%2C+M">Max Kircher</a>, <a href="/search/physics?searchtype=author&query=Trinter%2C+F">Florian Trinter</a>, <a href="/search/physics?searchtype=author&query=Grundmann%2C+S">Sven Grundmann</a>, <a href="/search/physics?searchtype=author&query=Vela-Perez%2C+I">Isabel Vela-Perez</a>, <a href="/search/physics?searchtype=author&query=Brennecke%2C+S">Simon Brennecke</a>, <a href="/search/physics?searchtype=author&query=Eicke%2C+N">Nicolas Eicke</a>, <a href="/search/physics?searchtype=author&query=Rist%2C+J">Jonas Rist</a>, <a href="/search/physics?searchtype=author&query=Eckart%2C+S">Sebastian Eckart</a>, <a href="/search/physics?searchtype=author&query=Houamer%2C+S">Salim Houamer</a>, <a href="/search/physics?searchtype=author&query=Chuluunbaatar%2C+O">Ochbadrakh Chuluunbaatar</a>, <a href="/search/physics?searchtype=author&query=Popov%2C+Y+V">Yuri V. Popov</a>, <a href="/search/physics?searchtype=author&query=Volobuev%2C+I+P">Igor P. Volobuev</a>, <a href="/search/physics?searchtype=author&query=Bagschik%2C+K">Kai Bagschik</a>, <a href="/search/physics?searchtype=author&query=Piancastelli%2C+M+N">Maria Novella Piancastelli</a>, <a href="/search/physics?searchtype=author&query=Lein%2C+M">Manfred Lein</a>, <a href="/search/physics?searchtype=author&query=Jahnke%2C+T">Till Jahnke</a>, <a href="/search/physics?searchtype=author&query=Sch%C3%B6ffler%2C+M+S">Markus S. Sch枚ffler</a>, <a href="/search/physics?searchtype=author&query=D%C3%B6rner%2C+R">Reinhard D枚rner</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="1911.04780v2-abstract-short" style="display: inline;"> Compton scattering is one of the fundamental interaction processes of light with matter. Already upon its discovery [1] it was described as a billiard-type collision of a photon kicking a quasi-free electron. With decreasing photon energy, the maximum possible momentum transfer becomes so small that the corresponding energy falls below the binding energy of the electron. Then ionization by Compton… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.04780v2-abstract-full').style.display = 'inline'; document.getElementById('1911.04780v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1911.04780v2-abstract-full" style="display: none;"> Compton scattering is one of the fundamental interaction processes of light with matter. Already upon its discovery [1] it was described as a billiard-type collision of a photon kicking a quasi-free electron. With decreasing photon energy, the maximum possible momentum transfer becomes so small that the corresponding energy falls below the binding energy of the electron. Then ionization by Compton scattering becomes an intriguing quantum phenomenon. Here we report a kinematically complete experiment on Compton scattering at helium atoms below that threshold. We determine the momentum correlations of the electron, the recoiling ion, and the scattered photon in a coincidence experiment finding that electrons are not only emitted in the direction of the momentum transfer, but that there is a second peak of ejection to the backward direction. This finding links Compton scattering to processes as ionization by ultrashort optical pulses [2], electron impact ionization [3,4], ion impact ionization [5,6], and neutron scattering [7] where similar momentum patterns occur. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.04780v2-abstract-full').style.display = 'none'; document.getElementById('1911.04780v2-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 November, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 November, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">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> Nature Physics 16, 756-760 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1810.07415">arXiv:1810.07415</a> <span> [<a href="https://arxiv.org/pdf/1810.07415">pdf</a>, <a href="https://arxiv.org/format/1810.07415">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic and Molecular Clusters">physics.atm-clus</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.121.243002">10.1103/PhysRevLett.121.243002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Breakdown of the spectator concept in low-electron-energy resonant decay processes </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Mhamdi%2C+A">A. Mhamdi</a>, <a href="/search/physics?searchtype=author&query=Rist%2C+J">J. Rist</a>, <a href="/search/physics?searchtype=author&query=Aslit%C3%BCrk%2C+D">D. Aslit眉rk</a>, <a href="/search/physics?searchtype=author&query=Weller%2C+M">M. Weller</a>, <a href="/search/physics?searchtype=author&query=Melzer%2C+N">N. Melzer</a>, <a href="/search/physics?searchtype=author&query=Trabert%2C+D">D. Trabert</a>, <a href="/search/physics?searchtype=author&query=Kircher%2C+M">M. Kircher</a>, <a href="/search/physics?searchtype=author&query=Vela-Perez%2C+I">I. Vela-Perez</a>, <a href="/search/physics?searchtype=author&query=Siebert%2C+J">J. Siebert</a>, <a href="/search/physics?searchtype=author&query=Eckart%2C+S">S. Eckart</a>, <a href="/search/physics?searchtype=author&query=Grundmann%2C+S">S. Grundmann</a>, <a href="/search/physics?searchtype=author&query=Kastirke%2C+G">G. Kastirke</a>, <a href="/search/physics?searchtype=author&query=Waitz%2C+M">M. Waitz</a>, <a href="/search/physics?searchtype=author&query=Khan%2C+A">A. Khan</a>, <a href="/search/physics?searchtype=author&query=Sch%C3%B6ffler%2C+M+S">M. S. Sch枚ffler</a>, <a href="/search/physics?searchtype=author&query=Trinter%2C+F">F. Trinter</a>, <a href="/search/physics?searchtype=author&query=D%C3%B6rner%2C+R">R. D枚rner</a>, <a href="/search/physics?searchtype=author&query=Jahnke%2C+T">T. Jahnke</a>, <a href="/search/physics?searchtype=author&query=Demekhin%2C+P+V">Ph. V. Demekhin</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="1810.07415v1-abstract-short" style="display: inline;"> We suggest that low energy electrons, released by resonant decay processes, experience substantial scattering on the electron density of excited electrons, which remain a spectator during the decay. As a result, the angular emission distribution is altered significantly. This effect is expected to be a common feature of low energy secondary electron emission. In this letter, we exemplify our idea… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1810.07415v1-abstract-full').style.display = 'inline'; document.getElementById('1810.07415v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1810.07415v1-abstract-full" style="display: none;"> We suggest that low energy electrons, released by resonant decay processes, experience substantial scattering on the electron density of excited electrons, which remain a spectator during the decay. As a result, the angular emission distribution is altered significantly. This effect is expected to be a common feature of low energy secondary electron emission. In this letter, we exemplify our idea by examining the spectator resonant interatomic Coulombic decay (sRICD) of Ne dimers. Our theoretical predictions are confirmed by a corresponding coincidence experiment. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1810.07415v1-abstract-full').style.display = 'none'; document.getElementById('1810.07415v1-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 October, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 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">5 pages two figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 121, 243002 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1806.06276">arXiv:1806.06276</a> <span> [<a href="https://arxiv.org/pdf/1806.06276">pdf</a>, <a href="https://arxiv.org/format/1806.06276">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic and Molecular Clusters">physics.atm-clus</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/PhysRevA.98.050701">10.1103/PhysRevA.98.050701 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Frustrated Coulomb explosion of small helium clusters </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kazandjian%2C+S">S. Kazandjian</a>, <a href="/search/physics?searchtype=author&query=Rist%2C+J">J. Rist</a>, <a href="/search/physics?searchtype=author&query=Weller%2C+M">M. Weller</a>, <a href="/search/physics?searchtype=author&query=Wiegandt%2C+F">F. Wiegandt</a>, <a href="/search/physics?searchtype=author&query=Aslit%C3%BCrk%2C+D">D. Aslit眉rk</a>, <a href="/search/physics?searchtype=author&query=Grundmann%2C+S">S. Grundmann</a>, <a href="/search/physics?searchtype=author&query=Kircher%2C+M">M. Kircher</a>, <a href="/search/physics?searchtype=author&query=Nalin%2C+G">G. Nalin</a>, <a href="/search/physics?searchtype=author&query=Pitters%2C+D">D. Pitters</a>, <a href="/search/physics?searchtype=author&query=P%C3%A9rez%2C+I+V">I. Vela P茅rez</a>, <a href="/search/physics?searchtype=author&query=Waitz%2C+M">M. Waitz</a>, <a href="/search/physics?searchtype=author&query=Schiwietz%2C+G">G. Schiwietz</a>, <a href="/search/physics?searchtype=author&query=Griffin%2C+B">B. Griffin</a>, <a href="/search/physics?searchtype=author&query=Williams%2C+J+B">J. B. Williams</a>, <a href="/search/physics?searchtype=author&query=D%C3%B6rner%2C+R">R. D枚rner</a>, <a href="/search/physics?searchtype=author&query=Sch%C3%B6ffler%2C+M">M. Sch枚ffler</a>, <a href="/search/physics?searchtype=author&query=Miteva%2C+T">T. Miteva</a>, <a href="/search/physics?searchtype=author&query=Trinter%2C+F">F. Trinter</a>, <a href="/search/physics?searchtype=author&query=Jahnke%2C+T">T. Jahnke</a>, <a href="/search/physics?searchtype=author&query=Sisourat%2C+N">N. Sisourat</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="1806.06276v2-abstract-short" style="display: inline;"> Almost ten years ago, energetic neutral hydrogen atoms were detected after a strong-field double ionization of H$_2$. This process, called 'frustrated tunneling ionization', occurs when an ionized electron is recaptured after being driven back to its parent ion by the electric field of a femtosecond laser. In the present study we demonstrate that a related process naturally occurs in clusters with… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.06276v2-abstract-full').style.display = 'inline'; document.getElementById('1806.06276v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1806.06276v2-abstract-full" style="display: none;"> Almost ten years ago, energetic neutral hydrogen atoms were detected after a strong-field double ionization of H$_2$. This process, called 'frustrated tunneling ionization', occurs when an ionized electron is recaptured after being driven back to its parent ion by the electric field of a femtosecond laser. In the present study we demonstrate that a related process naturally occurs in clusters without the need of an external field: we observe a charge hopping that occurs during a Coulomb explosion of a small helium cluster, which leads to an energetic neutral helium atom. This claim is supported by theoretical evidence. As an analog to 'frustrated tunneling ionization', we term this process 'frustrated Coulomb explosion'. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.06276v2-abstract-full').style.display = 'none'; document.getElementById('1806.06276v2-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> 19 June, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 June, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. A 98, 050701 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1609.03828">arXiv:1609.03828</a> <span> [<a href="https://arxiv.org/pdf/1609.03828">pdf</a>, <a href="https://arxiv.org/format/1609.03828">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</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/10.1021/acs.jpclett.7b01000">10.1021/acs.jpclett.7b01000 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Observation of enhanced chiral asymmetries in the inner-shell photoionization of uniaxially oriented methyloxirane enantiomers </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Tia%2C+M">Maurice Tia</a>, <a href="/search/physics?searchtype=author&query=Pitzer%2C+M">Martin Pitzer</a>, <a href="/search/physics?searchtype=author&query=Kastirke%2C+G">Gregor Kastirke</a>, <a href="/search/physics?searchtype=author&query=Gatzke%2C+J">Janine Gatzke</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+H">Hong-Keun Kim</a>, <a href="/search/physics?searchtype=author&query=Trinter%2C+F">Florian Trinter</a>, <a href="/search/physics?searchtype=author&query=Rist%2C+J">Jonas Rist</a>, <a href="/search/physics?searchtype=author&query=Hartung%2C+A">Alexander Hartung</a>, <a href="/search/physics?searchtype=author&query=Trabert%2C+D">Daniel Trabert</a>, <a href="/search/physics?searchtype=author&query=Siebert%2C+J">Juliane Siebert</a>, <a href="/search/physics?searchtype=author&query=Henrichs%2C+K">Kevin Henrichs</a>, <a href="/search/physics?searchtype=author&query=Becht%2C+J">Jasper Becht</a>, <a href="/search/physics?searchtype=author&query=Zeller%2C+S">Stefan Zeller</a>, <a href="/search/physics?searchtype=author&query=Gassert%2C+H">Helena Gassert</a>, <a href="/search/physics?searchtype=author&query=Wiegandt%2C+F">Florian Wiegandt</a>, <a href="/search/physics?searchtype=author&query=Wallauer%2C+R">Robert Wallauer</a>, <a href="/search/physics?searchtype=author&query=Kuhlins%2C+A">Andreas Kuhlins</a>, <a href="/search/physics?searchtype=author&query=Schober%2C+C">Carl Schober</a>, <a href="/search/physics?searchtype=author&query=Bauer%2C+T">Tobias Bauer</a>, <a href="/search/physics?searchtype=author&query=Wechselberger%2C+N">Natascha Wechselberger</a>, <a href="/search/physics?searchtype=author&query=Burzynski%2C+P">Phillip Burzynski</a>, <a href="/search/physics?searchtype=author&query=Neff%2C+J">Jonathan Neff</a>, <a href="/search/physics?searchtype=author&query=Weller%2C+M">Miriam Weller</a>, <a href="/search/physics?searchtype=author&query=Metz%2C+D">Daniel Metz</a>, <a href="/search/physics?searchtype=author&query=Kircher%2C+M">Max Kircher</a> , et al. (16 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="1609.03828v2-abstract-short" style="display: inline;"> Most large molecules are chiral in their structure: they exist as two enantiomers, which are mirror images of each other. Whereas the rovibronic sublevels of two enantiomers are almost identical, it turns out that the photoelectric effect is sensitive to the absolute configuration of the ionized enantiomer - an effect termed Photoelectron Circular Dichroism (PECD). Our comprehensive study demonstr… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1609.03828v2-abstract-full').style.display = 'inline'; document.getElementById('1609.03828v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1609.03828v2-abstract-full" style="display: none;"> Most large molecules are chiral in their structure: they exist as two enantiomers, which are mirror images of each other. Whereas the rovibronic sublevels of two enantiomers are almost identical, it turns out that the photoelectric effect is sensitive to the absolute configuration of the ionized enantiomer - an effect termed Photoelectron Circular Dichroism (PECD). Our comprehensive study demonstrates that the origin of PECD can be found in the molecular frame electron emission pattern connecting PECD to other fundamental photophysical effects as the circular dichroism in angular distributions (CDAD). Accordingly, orienting a chiral molecule in space enhances the PECD by a factor of about 10. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1609.03828v2-abstract-full').style.display = 'none'; document.getElementById('1609.03828v2-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, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 September, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J. Phys. Chem. Lett. (2017) 8 pp 2780-2786 </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 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg> <a href="https://info.arxiv.org/help/contact.html"> Contact</a> </li> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>subscribe to arXiv mailings</title><desc>Click here to subscribe</desc><path d="M476 3.2L12.5 270.6c-18.1 10.4-15.8 35.6 2.2 43.2L121 358.4l287.3-253.2c5.5-4.9 13.3 2.6 8.6 8.3L176 407v80.5c0 23.6 28.5 32.9 42.5 15.8L282 426l124.6 52.2c14.2 6 30.4-2.9 33-18.2l72-432C515 7.8 493.3-6.8 476 3.2z"/></svg> <a href="https://info.arxiv.org/help/subscribe"> Subscribe</a> </li> </ul> </div> </div> </div>   <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/license/index.html">Copyright</a></li> <li><a href="https://info.arxiv.org/help/policies/privacy_policy.html">Privacy Policy</a></li> </ul> </div> <div class="column sorry-app-links"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/web_accessibility.html">Web Accessibility Assistance</a></li> <li> <p class="help"> <a class="a11y-main-link" href="https://status.arxiv.org" target="_blank">arXiv Operational Status <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 512" class="icon filter-dark_grey" role="presentation"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z"/></svg></a><br> Get status notifications via <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/email/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><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 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg>email</a> or <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/slack/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512" class="icon filter-black" role="presentation"><path d="M94.12 315.1c0 25.9-21.16 47.06-47.06 47.06S0 341 0 315.1c0-25.9 21.16-47.06 47.06-47.06h47.06v47.06zm23.72 0c0-25.9 21.16-47.06 47.06-47.06s47.06 21.16 47.06 47.06v117.84c0 25.9-21.16 47.06-47.06 47.06s-47.06-21.16-47.06-47.06V315.1zm47.06-188.98c-25.9 0-47.06-21.16-47.06-47.06S139 32 164.9 32s47.06 21.16 47.06 47.06v47.06H164.9zm0 23.72c25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06H47.06C21.16 243.96 0 222.8 0 196.9s21.16-47.06 47.06-47.06H164.9zm188.98 47.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06h-47.06V196.9zm-23.72 0c0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06V79.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06V196.9zM283.1 385.88c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06v-47.06h47.06zm0-23.72c-25.9 0-47.06-21.16-47.06-47.06 0-25.9 21.16-47.06 47.06-47.06h117.84c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06H283.1z"/></svg>slack</a> </p> </li> </ul> </div> </div> </div>  </div> </footer> <script src="https://static.arxiv.org/static/base/1.0.0a5/js/member_acknowledgement.js"></script> </body> </html>

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