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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2401.07976 |
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| _version_ | 1866913520523673600 |
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| author | Ge, Zhuang Reponen, Mikael Eronen, Tommi Hu, Baishan Kortelainen, Markus Kankainen, Anu Moore, Iain Nesterenko, Dmitrii Yuan, Cenxi Beliuskina, Olga Cañete, Laetitia de Groote, Ruben Delafosse, Celement Delahaye, Pierre Dickel, Timo de Roubin, Antoine Geldhof, Sarina Gins, Wouter Holt, Jason Hukkanen, Marjut Jaries, Arthur Jokinen, Ari Koszorús, Ágota Kripkó-Koncz, Gabriella Kujanpää, Sonja Lam, Yihua Nikas, Stylianos Ortiz-Cortes, Alejandro Penttilä, Heikki Pitman-Weymouth, Daniel Plaß, Wolfgang Pohjalainen, Ilkka Raggio, Andrea Rinta-Antila, Sami Romero, Jorge Stryjczyk, Marek Vilen, Markus Virtanen, Ville Zadvornaya, Alexandra |
| author_facet | Ge, Zhuang Reponen, Mikael Eronen, Tommi Hu, Baishan Kortelainen, Markus Kankainen, Anu Moore, Iain Nesterenko, Dmitrii Yuan, Cenxi Beliuskina, Olga Cañete, Laetitia de Groote, Ruben Delafosse, Celement Delahaye, Pierre Dickel, Timo de Roubin, Antoine Geldhof, Sarina Gins, Wouter Holt, Jason Hukkanen, Marjut Jaries, Arthur Jokinen, Ari Koszorús, Ágota Kripkó-Koncz, Gabriella Kujanpää, Sonja Lam, Yihua Nikas, Stylianos Ortiz-Cortes, Alejandro Penttilä, Heikki Pitman-Weymouth, Daniel Plaß, Wolfgang Pohjalainen, Ilkka Raggio, Andrea Rinta-Antila, Sami Romero, Jorge Stryjczyk, Marek Vilen, Markus Virtanen, Ville Zadvornaya, Alexandra |
| contents | High-precision mass measurements of exotic $^{95-97}$Ag isotopes close to the $N = Z$ line have been conducted with the JYFLTRAP double Penning trap mass spectrometer, with the silver ions produced using the recently commissioned inductively-heated hot cavity catcher laser ion source at the Ion Guide Isotope Separator On-Line facility. The atomic mass of $^{95}$Ag was directly determined for the first time. In addition, the atomic masses of $β$-decaying 2$^+$ and 8$^+$ states in $^{96}$Ag have been identified and measured for the first time, and the precision of the $^{97}$Ag mass has been improved. The newly measured masses, with a precision of $\approx$ 1 keV/c$^2$, have been used to investigate the $N =$ 50 neutron shell closure confirming it to be robust. Empirical shell-gap and pairing energies determined with the new ground-state mass data are compared with the state-of-the-art \textit{ab initio} calculations with various chiral effective field theory Hamiltonians. The precise determination of the excitation energy of the $^{96m}$Ag isomer in particular serves as a benchmark for \textit{ab initio} predictions of nuclear properties beyond the ground state, specifically for odd-odd nuclei situated in proximity to the proton dripline below $^{100}$Sn. In addition, density functional theory (DFT) calculations and configuration-interaction shell-model (CISM) calculations are compared with the experimental results. All theoretical approaches face challenges to reproduce the trend of nuclear ground-state properties in the silver isotopic chain across the $N =$50 neutron shell and toward the proton drip-line. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_07976 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | High-precision mass measurements of neutron deficient silver isotopes probe the robustness of the $N$ = 50 shell closure Ge, Zhuang Reponen, Mikael Eronen, Tommi Hu, Baishan Kortelainen, Markus Kankainen, Anu Moore, Iain Nesterenko, Dmitrii Yuan, Cenxi Beliuskina, Olga Cañete, Laetitia de Groote, Ruben Delafosse, Celement Delahaye, Pierre Dickel, Timo de Roubin, Antoine Geldhof, Sarina Gins, Wouter Holt, Jason Hukkanen, Marjut Jaries, Arthur Jokinen, Ari Koszorús, Ágota Kripkó-Koncz, Gabriella Kujanpää, Sonja Lam, Yihua Nikas, Stylianos Ortiz-Cortes, Alejandro Penttilä, Heikki Pitman-Weymouth, Daniel Plaß, Wolfgang Pohjalainen, Ilkka Raggio, Andrea Rinta-Antila, Sami Romero, Jorge Stryjczyk, Marek Vilen, Markus Virtanen, Ville Zadvornaya, Alexandra Nuclear Experiment Nuclear Theory High-precision mass measurements of exotic $^{95-97}$Ag isotopes close to the $N = Z$ line have been conducted with the JYFLTRAP double Penning trap mass spectrometer, with the silver ions produced using the recently commissioned inductively-heated hot cavity catcher laser ion source at the Ion Guide Isotope Separator On-Line facility. The atomic mass of $^{95}$Ag was directly determined for the first time. In addition, the atomic masses of $β$-decaying 2$^+$ and 8$^+$ states in $^{96}$Ag have been identified and measured for the first time, and the precision of the $^{97}$Ag mass has been improved. The newly measured masses, with a precision of $\approx$ 1 keV/c$^2$, have been used to investigate the $N =$ 50 neutron shell closure confirming it to be robust. Empirical shell-gap and pairing energies determined with the new ground-state mass data are compared with the state-of-the-art \textit{ab initio} calculations with various chiral effective field theory Hamiltonians. The precise determination of the excitation energy of the $^{96m}$Ag isomer in particular serves as a benchmark for \textit{ab initio} predictions of nuclear properties beyond the ground state, specifically for odd-odd nuclei situated in proximity to the proton dripline below $^{100}$Sn. In addition, density functional theory (DFT) calculations and configuration-interaction shell-model (CISM) calculations are compared with the experimental results. All theoretical approaches face challenges to reproduce the trend of nuclear ground-state properties in the silver isotopic chain across the $N =$50 neutron shell and toward the proton drip-line. |
| title | High-precision mass measurements of neutron deficient silver isotopes probe the robustness of the $N$ = 50 shell closure |
| topic | Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2401.07976 |