Backbending phenomena in Ce-132,Ce-134,Ce-136 with a pair-truncated shell model

The backbending phenomena observed in Ce isotopes, 132,134,136Ce are investigated in terms of a pair-truncated shell model, a fully microscopic theory which conserves the nucleon number and the total spin. The model reproduces quite well the backbending phenomena, where the experimental bending point of 132Ce is spin 12 and those of 134Ce and 136Ce are spin 10. In addition to high spin states, the theory provides a successful description of energy levels for low-lying collective states as well as those electromagnetic properties, such as B(E2) branching ratios and g factors.Source published by American Physical Society