Energy Levels of the Silicon Isotopes from Inelastic Proton Scattering

Abstract

Energy levels of the stable isotopes of silicon, ${\mathrm{Si}}^{28}$, ${\mathrm{Si}}^{29}$, and ${\mathrm{Si}}^{30}$, up to 6.5-Mev excitation have been investigated by studying the inelastic scattering of 7.5-Mev to 8.5-Mev protons from a thin silicon-dioxide target with a broad-range magnetic spectrograph. Several new levels are reported, and the significance of the ${\mathrm{Si}}^{28}$ results is discussed in regard to a previously proposed interpretation of the level spectrum.