Trends in theg_7/2andh_11/2neutron single-particle energies inN= 51 isotones

Abstract

The energies of the g 7/2 and h 11/2 neutron orbitals in N = 51 isotones have been investigated. The single-neutron adding reactions (d,p) and (α, 3 He) have been performed on 88 Sr, 90 Zr and 92 Mo targets, at beam energies of 15 MeV and 50 MeV, respectively. These measurements were supplemented by studying the d(86 Kr,p) 87 Kr reaction at an energy of 10 MeV/u, in inverse kinematics. Absolute cross sections were measured, assignments made and spectroscopic factors extracted. The energy centroids of the single-particle strength have been deduced and the observed trends are discussed.