Shell model yrast states in the many-particle nucleus 72 157 Hf 85

摘要: In-beamγγ- andγγn-measurements have for the first time identified excited states in the 72 157 Hf85 nucleus and established its yrast levels up to 6.5 MeV I=(51/2). The results of parameter-free 11-particle recoupling calculations framework shell model configurationsπh 11 2/8 νf 7 2/3 andπh 2/2 h9/2 are excellent agreement with observed 39/2 at 4.758 MeV. A weakly populated 52 ns 29/2+ isomer 2.876 is assigned as three-neutron configurationνf7/2h9/2i13/2.