Rotational bands in 107Cd

Abstract

High-spin states in 107Cd were populated by the reaction 94Zr( 17O, 4n) at 80 MeV and their decay was studied by γ-spectroscopic methods using the NORDBALL multi-detector array. The experiment included γ-ray yields, γ-coincidences and γ-ray angular correlation measurements. Rotational bands were observed up to spin 39 2 and ( 51 2 + ) in the negative- and positive-parity bands, respectively. Calculations of total routhian surfaces and quasi-particle routhians have been performed and are used for assigning quasiparticle configurations to the bands. In the g 7 2 neutron band, a h 11 2 neutron alignment is observed. A large signature spliting is expected in the ν g 7 2 band before the band crossing. For the band built on a single ν h 11 2 quasiparticle, an alignment of either g 7 2 or h 11 2 neutrons is proposed. Shape change effects are discussed.