Excited states in 163,164Ho populated through incomplete fusion

Abstract

High-spin states in 163,164Ho were investigated by means of in-beam γ-ray spectroscopy techniques using the multidetector array GASP. Excited states in 163,164Ho were populated predominantly through the incomplete-fusion mechanism in the 160Gd(11B, αxn) reaction at a beam energy of 61 MeV. Known rotational bands in 163Ho have been extended to higher spins and a three-quasiparticle band has been observed in this nucleus. Rotational bands have been identified in 164Ho and their configurations have been discussed. Empirical Gallagher-Moszkowski (GM) splitting energies were extracted from the π7/2 −[523] ⊗ ν5/2 −[523] and π7/2 −[523] ⊗ ν5/2 +[642] GM doublets. Alignments, band crossing frequencies, and electromagnetic properties have been analyzed in the framework of the cranking model.