Abstract
The ground and low-lying states of neutron-rich exotic Te and Sn isotopes are studied in terms of the nuclear shell model by the same Hamiltonian used for the spherical-deformed shape phase transition of Ba isotopes, without any adjustment. An anomalously small value is obtained for in , consistent with a recent experiment. The levels of up to yrast are shown to be in agreement with observed ones. It is pointed out that can be an exceptionally suitable case for studying mixed-symmetry , , and states, and predictions are made for energies and and properties. Systematic trends of structure of heavier and more exotic Sn and Te isotopes beyond are studied by the Monte Carlo shell model, presenting an unusual and very slow evolution of collectivity/deformation.
- Received 23 August 2004
DOI:https://doi.org/10.1103/PhysRevC.70.054313
©2004 American Physical Society