Abstract
A neutron capture cross section for the 112Cd(n, γ)113Cdm reaction has been measured with neutrons provided from a nuclear reactor in order to study the astrophysical origin of a rare p-process isotope 115Sn, which may be produced by a nucleosynthesis flow through 113Cdm in the s-process. We have obtained the thermal neutron capture cross section of 0.028 ± 0.009 [b] and the resonance integral of 1.1 ± 0.3 [b] using a cadmium difference method. The cross section ratio of the isomer to the ground state has been calculated as a function of the incident neutron energy, E, by using a statistical model. The calculated ratios are almost constant over a wide range of E < 100 keV. We have evaluated the s-process contribution to the solar abundance of 115Sn using the classical steady-flow model with various astrophysical parameters. This calculated result has shown that the production through 113Cdm may give minor contribution to 115Sn.
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