Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009apj...707..859h&link_type=abstract
The Astrophysical Journal, Volume 707, Issue 2, pp. 859-865 (2009).
Astronomy and Astrophysics
Astronomy
Methods: Laboratory, Nuclear Reactions, Nucleosynthesis, Abundances
Scientific paper
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.
Chiba Satoshi
Harada Hideo
Hatsukawa Yuichi
Hayakawa Tadaaki
Iwamoto Nobuyuki
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