Proton Groups from the F19(α, p)Ne22 Reaction and the Ca40(α, p)Sc43 Reaction

Abstract

A Ca${\mathrm{F}}_2$ target was bombarded with 21.9-Mev alpha particles and the energies of the outgoing protons were measured with a magnetic spectrometer. Proton groups leading to energy levels in ${\mathrm{Ne}}^{22}$ at excitation energies of 0, 1.28, 3.37, 4.52, 5.18, 5.67, 6.41, 6.88, and 7.49 Mev were seen. The ground state $Q$ value for the ${\mathrm{Ca}}^{40}(\alpha , p){\mathrm{Sc}}^{43}$ reaction was found to be -3.47±0.030 Mev. Some information about absolute cross sections and angular distributions for the fluorine and calcium reactions is also presented.