Microscopic description of systematic doublet bands in the A ∼ 130 region

Abstract

The properties of the yrast and yrare states with the νh11/2 ⊗ πh11/2 configuration in the mass A ∼ 130 region are studied by a full microscopic theoretical framework of the pair-truncated shell model. This approach for energy levels and electromagnetic transition rates in 134La gives good agreement with experiment. The analysis of the wavefunctions reveals new band structure, which results from chopsticks configurations of two angular momenta of the unpaired neutron and the unpaired proton, weakly coupled with the quadrupole collective excitations of the even–even core.