Spin Flip in the Inelastic Scattering of 30- and 40-MeV Protons bySi29

Abstract

Proton spin flip in excitation of the first $2^{+}$ state in ${}_{}{}^{28}{}_{}{}^{}\mathrm{Si}$ has been determined at 29.7 and 40.0 MeV by measuring the correlation between inelastically scattered protons and gamma rays emitted normal to the scattering plane. The data are well described by the distorted-wave Born-approximation collective model when the deformed spin-dependent potential has the full Thomas form.