Proton versus neutron excitations in the high-spin spectrum of Cd-102 - art. no. 054304

Using the reaction Ni-58(Cr-50,alpha 2p) and the coincidence recoil distanc e Doppler shift technique, we determined picosecond lifetimes of high-spin states in Cd-102. The positive-parity yrast and yrare cascades evidence the competition and interplay of the two proton holes in the g(9/2) orbit and four neutrons in the d(5/2) g(7/2) and h(11/2) orbits, outside the Z = N = 50 Sn-100 core. At positive parity, this interplay leads to multiplets of s tates in the spin range 6(+)-10(-). some of which are connected by very wea k E2 transitions. Al higher spins, spin-aligned proton holes and neutrons l ead to magnetic rotation. Energies and transition strengths when compared w ith the predictions of several shell model calculations reveal the high sen sitivity on the model parameters.