High-precision mass measurements of the ground and isomeric states in Ag 124 , 125

Le résumé fourni par la source

The masses of the ground and isomeric states in $^{124,125}\mathrm{Ag}$ have been measured using the phase-imaging ion-cyclotron-resonance technique at the JYFLTRAP double Penning trap mass spectrometer. The ground states of $^{124}\mathrm{Ag}$ and $^{125}\mathrm{Ag}$ were found to be 30(250) keV and 250(430) keV less bound but 36 and 110 times more precise than in the Atomic Mass Evaluation 2020, respectively. The excitation energy of $^{124}\mathrm{Ag}^{m}$, ${E}_{x}=188.2(25)$ keV, was determined for the first time. The new precise mass values have been utilized to study the evolution of nuclear structure via two-neutron separation energies. The impact on the astrophysical rapid neutron capture process has been investigated via neutron-capture reaction rate calculations. The precision measurements indicate a more linear trend in two-neutron separation energies and reduce the mass-related uncertainties for the neutron-capture rate of $^{124}\mathrm{Ag}(n,\ensuremath{\gamma})^{125}\mathrm{Ag}$ by a factor of around 100. The new mass values also improve the mass of $^{123}\mathrm{Pd}$, previously measured using $^{124}\mathrm{Ag}$ as a reference.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.