Mass Measurements and Implications for the Energy of the High-Spin Isomer in 94Ag

TL;DR

This study measures the masses of isotopes near 94Ag using Penning trap mass spectrometry, revealing conflicting data on the excitation energy of its high-spin isomer, impacting nuclear structure understanding.

Contribution

The paper provides new mass measurements of isotopes around 94Ag, highlighting discrepancies in the excitation energy of its high-spin isomer, which challenges existing nuclear models.

Findings

Masses of 92Rh and 94Pd measured with Penning trap.

Conflicting excitation energy values for 94Ag high-spin isomer.

Results impact understanding of nuclear structure near 94Ag.

Abstract

Nuclides in the vicinity of 94Ag have been studied with the Penning trap mass spectrometer JYFLTRAP at the Ion-Guide Separator On-Line. The masses of the two-proton-decay daughter 92Rh and the beta-decay daughter 94Pd of the high-spin isomer in 94Ag have been measured, and the masses of 93Pd and 94Ag have been deduced. When combined with the data from the one-proton or two-proton-decay experiments, the results lead to contradictory mass excess values for the high-spin isomer in 94Ag, -46370(170) or -44970(100) keV, corresponding to excitation energies of 6960(400) or 8360(370) keV, respectively.