Scattering of 22.3 MeV polarized protons from the even-mass cadmium isotopes 106-116Cd

Measurements have been done on polarized-proton scattering from the even-mass cadmium isotopes 106-116Cd, at a beam energy of 22.3 MeV. The experimental data were analysed using first- and second-order vibrational models in a coupled-channels formalism. The 01+, 21+ and 31- levels are represented satisfactorily by theory. In 106-116Cd the 22+ and 41+ levels were resolved; for the 22+ levels the theory systematically underestimates the first diffraction maximum of the cross section at 30 degrees while the 41+ levels are reproduced reasonably well. In 112-114Cd the 02+ level could also be studied; there are indications for a strong coupling between the two-phonon 0+ state in the ground-state band and the 0+ head of the intruder band. In 114Cd we also investigated the 23+ level, probably the first excited state of the intruder system, which showed an angular pattern with more pronounced details than the 21+ states. Finally in 112Cd the 11$and 51- levels were studied which have a strong direct coupling to the ground state.