Abstract
We report on the first direct mass measurements of the and isotopes performed at the Ion Guide Isotope Separator On-Line facility using the JYFLTRAP double Penning trap mass spectrometer. The masses of and isotopes are in agreement with the literature, while and differ from literature by 49, 13, and 85 keV (6.1, 1.9, and 2.1 standard deviations), respectively. The excitation energy of the first isomeric state, 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 value for the 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 .
- Received 29 August 2023
- Accepted 6 November 2023
- Corrected 4 September 2024
DOI:https://doi.org/10.1103/PhysRevC.108.064302
©2023 American Physical Society
Physics Subject Headings (PhySH)
Corrections
4 September 2024
Correction: The value given in the eighth row of the fifth column of Table I was incorrect and has been fixed.