Excited states in Ho-163,Ho-164 populated through incomplete-fusion reactions

摘要

High-spin states in 163,164 Ho were investigated by means of in-beam gamma-ray spectroscopy techniques using the multidetector array GASP. Excited states in 163,164 Ho were populated predominantly through the incomplete-fusion mechanism in the Gd-160(B-11, alphaxn) reaction at a beam energy of 61 MeV. Known rotational bands in Ho-163 have been extended to higher spins and a three-quasiparticle band has been observed in this nucleus. Rotational bands have been identified in Ho-164 and their configurations have been discussed. Empirical Gallagher-Moszkowski (CM) splitting energies were extracted from the pi7/2(-)[523] circle times nu5/2(-)[523] and pi7/2(-)[523] circle times v5/2(+)[642] GM doublets. Alignments, band crossing frequencies, and electromagnetic properties have been analyzed in the framework of the cranking model.