Re-investigation of neutron capture by 84Kr and 86Kr in the s-process nucleosynthesis

The thermonuclear reaction rates and Maxwellian averaged cross sections (MACS) for the 84Kr(n,γ) 85Kr and 86Kr(n,γ) 87Kr processes were examined using the statistical model code Talys v1.96. The effects of nuclear level densities (NLDs) on Maxwellian averaged cross sections and neutron capture rates are examined both quantitatively and qualitatively. The present Talys based MACS and radiative capture rates for 84Kr(n,γ) 85Kr and 86Kr(n,γ) 87Kr processes agree well with the earlier reported findings. The statistical models nuclear properties (level density and gamma ray strength) were fine tuned to reproduce the existing experimental nuclear data.