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Cross section measurements of the $^{58}$Ni($\alpha$,$\gamma$)$^{62}$Znreaction were performed in the energy range $E_{\alpha}=5.5-9.5$ MeV at theNuclear Science Laboratory of the University of Notre Dame, using the NSCLSumming NaI(Tl) detector and the $\gamma$-summing technique. The measurementsare compared to predictions in the statistical Hauser-Feshbach model of nuclearreactions using the SMARAGD code. It is found that the energy dependence of thecross section is reproduced well but the absolute value is overestimated by theprediction. This can be remedied by rescaling the $\alpha$ width by a factor of0.45. Stellar reactivities were calculated with the rescaled $\alpha$ width andtheir impact on nucleosynthesis in type Ia supernovae has been studied. It isfound that the resulting abundances change by up to 5\% when using the newreactivities.

Measurement of the $^{58}$Ni($\alpha$,$\gamma$)$^{62}$Zn reaction and its astrophysical impact