High-spin proton and neutron intruder configurations in 106Cd

Abstract

High-spin states in 106Cd have been studied with the reactions 94Zr(16O, 4n)106Cd and 76Ge(34S, 4n)106Cd. A rotational band, based on a two-quasineutron (h 11 2)2 configuration, is observed from its 10+ bandhead to spin 28 H{stroke}. This structure undergoes a band-crossing at a rotational frequency of approximately 0.45 MeV /H{stroke}, interpreted as the alignment of a pair of g 7 2 neutrons. Time-correlated spectroscopy has been used to identify states above the previously observed 12+ isomer at 4660 keV. These include a weakly populated, strongly coupled structure which indirectly feeds the isomer, and whose alignment and in-band decay properties are consistent with a deformed ν(h 11 2)2π(g 9 2g 7 2), four-quasiparticle configuration. The results are discussed in terms of cranked-shell-model and total-routhian-surface calculations. No evidence is found for a reported 16+ isomer at 7119 keV. Show more