تقرير
High-precision mass measurements of neutron deficient silver isotopes probe the robustness of the $N$ = 50 shell closure
| العنوان: | High-precision mass measurements of neutron deficient silver isotopes probe the robustness of the $N$ = 50 shell closure |
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| المؤلفون: | 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 |
| سنة النشر: | 2024 |
| المجموعة: | Nuclear Experiment Nuclear Theory |
| مصطلحات موضوعية: | Nuclear Experiment, Nuclear Theory |
| الوصف: | 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 $\beta$-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. Comment: 9 pages, 3 figures |
| نوع الوثيقة: | Working Paper |
| الوصول الحر: | http://arxiv.org/abs/2401.07976Test |
| رقم الانضمام: | edsarx.2401.07976 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |