December 2023

Journal

First observation of isomeric states in 111Zr, 113Nb, and 115Mo

By:
Grzywacz, Robert K; Rasco, Bertis C; Rykaczewski, Krzysztof P; Stracener, Daniel W
Journal Name:
Physical Review C
Page Number:
64328-64328
Volume:
106
Issue Number:
6
Publication Date:
December 27, 2023
View DOI Listing:
https://doi.org/10.1103/PhysRevC.106.064328

Abstract

Isomeric states in the neutron-rich nuclei 111Zr [T1/2=0.10(7)μs], 113Nb [T1/2=0.7(4)μs], 115Mo [T1/2=46(3)μs] were first identified at the Radioactive Ion Beam Factory (RIBF) of RIKEN by using in-flight fission and fragmentation of a 238U beam at an energy of 345 MeV/u. This is a brief report of the γ transitions de-exciting from isomeric states and half-lives measurements, which provides the first spectroscopy in the nuclear region of prolate-to-oblate shape-phase transition around mass A ≈110.