Cross section measurements of $\alpha$-induced reactions on ${}^{92,94}$Mo and ${}^{112}$Sn for $p$-process studies

Abstract

The ${}^{92}$Mo($\alpha ,n$)${}^{95}$Ru, ${}^{94}$Mo($\alpha ,n$)${}^{97}$Ru, and ${}^{112}$Sn($\alpha ,\gamma$)${}^{116}$Te cross sections were measured at the upper end of the $p$-process Gamow window between 8.2 MeV and 11.1 MeV. Our results are slightly lower than global Hauser-Feshbach calculations from the code NON-SMOKER, but still within the uncertainty of the prediction. The ${}^{112}$Sn($\alpha ,\gamma$)${}^{116}$Te cross section agrees well with a recently measured thick-target cross section in the same energy range. For the ${}^{92,94}$Mo($\alpha ,n$) reactions the present data close to the reaction thresholds could eliminate previous uncertainties within a factor of 20, and we can present now useful comparisons to statistical model calculations with different optical potentials.

arXiv comment9 pages, 5 figures

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