Monopole effects, core excitations, and decay in the A= 130 hole nuclei near 132Sn * * Research at Zhoukou Normal University is supported by the National Natural Science Foundation of China (11505302). Research at China Institute of Atomic Energy is supported by the National Natural Science Foundation of China (11490563) and by the National Key Research and Development Program of

Abstract

The proton and neutron cross-shell excitations across the Z= 50 shell are investigated in the southwest quadrant of 132Sn by large-scale shell-model calculations with extended pairing and multipole-multipole force. The model space allows proton (neutron) core excitations, and both the low- and high-energy states for 130In are well described, as found by comparison with the experimental data. The monopole effects between the proton orbit and neutron orbit are studied as the new monopole correction that perfectly reproduces the first 1+ level in 130In. The energy interval of proton (neutron) core excitations in 130In lies in the range of 4.5−6.5 (2.0−4.1) MeV, and the high energy yrast states are predicted as neutron core excitations. The decays are calculated among the A=130 nuclei of 130In, 130Sn and 130Cd.