Negative parity levels in 103Rh via coulomb excitation

Abstract

Low-lying negative parity levels in 103Rh were Coulomb excited with 7–10 MeV 4He ions and 36–45 MeV 16O ions to test the weak-coupling core excitation model for two-quadrupole phononcore states. A Ge(Li) detector was used to observe the de-excitation γ-rays in singles and 16O-γ coincident spectra. Gamma-ray angular distribution measurements taken during 4He ion bombardment established spin values of 5 2 and 3 2 for the 880 and 1277 keV states, respectively. The 848, 880, 920 and 1107 keV levels have properties consistent with the interpretation of coupling a 2p 1 2 proton to the 4 + and second 2 + core states. Our spectra give some indication of a level at 803 keV previously seen in inelastic proton-scattering work which could be a state arising from coupling to the two- phonon 0 + core state.