Isomer production ratio of the 112Cd(n, γ) 113Cd reaction in an s-process branching point

A beta-decay unstable isomer with a half-life of 14.1 yr at 264 keV in Cd-113 is a branching point in the s process, from which a weak branch reaches to a rare tin isotope Sn-115 whose astrophysical origin has been an open problem. We have measured gamma rays decaying to the ground state or the isomer in the Cd-112(n, gamma) Cd-113 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 Cd-112 have been evaluated in an energy region of up to 9 keV, and the spin and parity of several resonances have been assigned.

Automated summary

The decay and production ratios of the isomer in the Cd-112(n, gamma) Cd-113 reaction were studied, along with the spin and parity assignment of several resonances following neutron capture reactions on Cd-112.