$\alpha$-induced reaction cross sections in the mass range $\mathbf{A}\approx 20-50$: a critical review

Abstract

In a recent review it was shown that the cross sections of $\alpha$-induced reactions in the $A\approx 20-50$ mass range follow a general and smooth trend in most cases. For comparison of cross sections of different targets at various energies the method of reduced cross sections ${\sigma }_{\mathrm{red}}$ and reduced energies $E_{\mathrm{red}}$ was used. Four outliers were identified: ${}^{36}$Ar and ${}^{40}$Ar with unusally small cross sections and ${}^{23}$Na and ${}^{33}$S with unusually large cross sections. New data for ${}^{23}$Na were presented at this NPA-7 conference; contrary to the previous data, these new data fit into the general systematics. In addition, a relation between the most effective energy $E_0$ for astrophysical reaction rates (the so-called Gamow window) and the reduced energy $E_{\mathrm{red}}$ is presented.

Comments: 4 pages, 2 figures, Proc. NPA7, York, 2015; J. Phys. Conf. Series, in print