Multinucleon Transfer Reactions to Study Single-Particle Evolution in Se Isotopes.

This contribution reports on the results of an experiment to study the near-yrast states in selenium isotopes around N=50, following their population in thick-target, multinucleon transfer reactions between an ⁸²Se beam and a ¹⁹²Os target. Discrete decays from states with spins of 20h and higher are clearly identified in the Os-like fragments. Information on the size of the energy gap between the f_5/2 and p_3/2 proton orbitals can be inferred from the spectroscopy of the N=48 isotone, ⁸²Se. The experiment results for the level schemes for ^80,82Se derived in the current work are compared with restricted-basis shell model calculations, which give a good description of the yrast sequences of these nuclei using a basis space limited to excitations in the (p_3/2 , p_1/2 , g_9/2 ) neutron and (f_5/2 , p_3/2 , p_1/2 ) proton orbitals. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]