High-precision Penning-trap mass measurements of Cd and In isotopes at JYFLTRAP remove the fluctuations in the two-neutron separation energies

A. Jaries et al.
Phys. Rev. C 108, 064302 – Published 4 December 2023

Abstract

We report on the first direct mass measurements of the Cd118,119 and In117119 isotopes performed at the Ion Guide Isotope Separator On-Line facility using the JYFLTRAP double Penning trap mass spectrometer. The masses of In117 and Cd118 isotopes are in agreement with the literature, while In118,119 and Cd119 differ from literature by 49, 13, and 85 keV (6.1, 1.9, and 2.1 standard deviations), respectively. The excitation energy of the In118 first isomeric state, Ex=40.3(25) keV, was determined for the first time. The updated mass values removed the fluctuations observed in the two-neutron separation energies and led to a smoother linear decrease of both isotopic chains. The log(ft) value for the Cd118 decay was also found to increase from 3.93(6) to 4.089(8). The reported results indicate an absence of significant structural changes around N=70.

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  • Received 29 August 2023
  • Accepted 6 November 2023

DOI:https://doi.org/10.1103/PhysRevC.108.064302

©2023 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

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Vol. 108, Iss. 6 — December 2023

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