Abstract
A -decay unstable isomer with a half-life of 14.1 yr at 264 keV in is a branching point in the process, from which a weak branch reaches to a rare tin isotope whose astrophysical origin has been an open problem. We have measured rays decaying to the ground state or the isomer in the reaction using high-energy resolution detectors in conjunction with a time-of-flight method. The relative production ratios of the isomer to the total following the neutron capture reactions on have been evaluated in an energy region of up to 9 keV, and the spin and parity of several resonances have been assigned.
- Received 21 October 2020
- Accepted 22 March 2021
DOI:https://doi.org/10.1103/PhysRevC.103.045801
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