Coulomb Excitation Studies Using Inelastically Scattered Particles

Targets of samarium, terbium, and cadmium were bombarded with protons, and in one case with deuterons, of up to 7.0 Mev and the inelastically scattered particles were observed. In the rare earths, samarium and terbium, four previously known levels were studied: the 58- and 139-kev levels in ${\mathrm{Tb}}^{159}$, the 80-kev level in ${\mathrm{Sm}}^{154}$, and the 123-kev level in ${\mathrm{Sm}}^{152}$. The excitation process was determined to be primarily Coulomb excitation up to 7.0 Mev, and the reduced transition probabilities were measured with a precision of approximately 10%. A test of the collective model was made by measurement of the ratios of the reduced transition probabilities to two excited states in the same nucleus, ${\mathrm{Tb}}^{159}$.