Excited states in I-110 and core polarization effects of the h(11/2) proton and neutron orbitals - art. no. 044309

Excited states in I-110 have been identified for the first time using the a lpha pn evaporation channel from the Ni-58+Ni-58 reaction at a beam energy of 250 MeV. The experiment was carried out using GAMMASPHERE coupled to the MICROBALL charged-particle detector array and an array of 15 neutron detec tors. Two collective structures were observed with the yrast band built on the pi h(11/2) x nu h(11/2) configuration. Comparisons of the yrast-band en ergies with the excitation energies of the yrast states in even Te-52 and i n odd Te-52 and I-53 isotopes for A similar to 110 were analyzed, revealing different responses of the underlying cores to the valence pi h(11/2) and nu h(11/2) orbitals. It is concluded that the neutron h(11/2) valence orbit al has a larger influence than that of the proton h(11/2) valence orbital.