High-precision mass measurements of neutron deficient silver isotopes probe the robustness of the N = 50 shell closure
arxiv(2024)
摘要
High-precision mass measurements of exotic ^95-97Ag 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 ^95Ag was directly
determined for the first time. In addition, the atomic masses of
β-decaying 2^+ and 8^+ states in ^96Ag have been identified and
measured for the first time, and the precision of the ^97Ag mass has been
improved. The newly measured masses, with a precision of ≈ 1 keV/c^2,
have been used to investigate the N = 50 neutron shell closure confirming it
to be robust. Precise empirical shell-gap and pairing energies determined with
the new ground-state mass data are used to benchmark state-of-the-art
ab initio calculations with various chiral effective field theory
Hamiltonians. 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. Furthermore,
the precise determination of the isomeric excitation energy of ^96mAg
serves as a benchmark for ab initio predictions of nuclear properties
beyond the ground state, specifically for odd-odd nuclei situated in proximity
to the proton dripline below ^100Sn.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要