Positive Parity States in Even-Even Te Isotopes**The project supported by National Natural Science Foundation of China (Grant No. 19775026), Excellent Young University Lecturer Fund of Education Ministy and Fok Ying-Tung Education Foundation

Abstract

The positive-parity collective states in the even-even Te isotopes are studied in the framework of interacting boson model. A schematic Hamiltonian able to describe the transition from to dynamical symmetry is used. It is found that the spectra can be well described by the transition from vibration to rotation. The behavior of the state can be partially described by the model, suggesting that the state is mainly composed of the normal sd configuration, but is influenced by the cross-shell excitation across the shell.