Filtering contaminants from a γ -sum spectrum: Measurement of the Mo94(p,γ)Tc95 cross section

Le résumé fourni par la source

A measurement of the $^{94}\mathrm{Mo}$($p,\ensuremath{\gamma}$)$^{95}\mathrm{Tc}$ cross section was performed. The cross section was measured in the energy range ${E}_{c.m.}=1.5--4.5$ MeV, spanning essentially the entirety of the Gamow window relevant to the astrophysical $\ensuremath{\gamma}\phantom{\rule{0.28em}{0ex}}\mathrm{process}$. The $\ensuremath{\gamma}$-summing technique was used to analyze the data. At lower energies the sum peak overlapped with peaks from the reaction $^{19}\mathrm{F}(p,\ensuremath{\alpha}\ensuremath{\gamma})^{16}\mathrm{O}$, so a new analysis method was developed to filter out the contamination from the this reaction. The measured cross section values were compared to the non-smoker database. The measured cross sections show enhanced resonancelike features at low energies, which are not predicted in the non-smoker code. The effects of this new measurement on the reaction rate were examined. It was found that there is a significant enhancement at lower temperatures in the ($p,\ensuremath{\gamma}$) reaction rate due to the enhancements found in the cross section.

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