Nucleon Transfer Reactions to Rotational States Induced by sup(206,208)Pb Projectiles

摘要

In a systematic study of nucleon transfer reactions accompanied by Coulomb excitation we have bombarded sup 152 Sm, sup 160 Gd and sup 232 Th with sup(206,208)Pb beams at incident energies close to the Coulomb barrier. Particle-gamma coincidence techniques were used to identify excited states of reaction products populated through inelastic scattering and in nucleon transfer reactions. One-neutron stripping and pick-up reactions on sup 152 Sm were observed leading to known states of the rotation aligned isub(13/2)-bands in sup 153 Sm and sup 151 Sm. In the sup 160 Gd + sup(206,208)Pb systems no significant population of low lying states of product nuclei was found in the nucleon-transfer channels. Large cross sections were observed for one- and two-neutron pick-up from sup 232 Th at an incident energy of 6.4 MeV/u. Around the grazing angle they are of the same order of magnitude as the cross section measured for inelastic scattering. The results are analyzed in the framework of semiclassical models. (ERA citation 11:057856)