19/2(+) Isomer Of Cd-125 And Realistic Shell-Model Calculations Of Neutron-Rich Cd Isotopes

The decay of a T-1/2 = 19(3) mu s isomeric state from Cd-125 has been observed using gamma-ray spectroscopy at the Lohengrin mass spectrometer of the Institut Laue-Langevin, Grenoble. Two coincident gamma rays were observed to be emitted from the decay of this isomeric state, contradicting recently published data on this nucleus. Realistic shell-model calculations have been performed to interpret the decay scheme, allowing a spin and parity of 19/2(+) to be assigned to the isomeric state. All configurations contributing to this isomeric state have amplitudes less than 7 %. Experimental data have recently been published on the decays of mu s isomeric states in Cd-127,Cd-128,Cd-130. Realistic shell-model calculations for these nuclei are presented which reproduce the known experimental decay schemes reasonably well.