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 Tb/sup 159/ the 80-kev level in Sm/sup 154/ and the 123-kev level in Sm/sup 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, Tb/sup 159/. Eight levels were observed in cadmium. Two of them, at 585 and 641 kev, have not been previously reported. The absolute cross sections of the eight levels were determined with various angles of observation, incident energy, and type of bombarding particle. It was concluded that Coulomb excitation is a major contributor to the cross section at 6.0 Mev, and reduced transition probabiiities were measured at this energy. (auth)