^(128—150)Ce偶偶核的低能谱和电磁跃迁的相互作用玻色子模型

Low-Lying Spectra and E2 Transition Rates in Even-even Ce Isotopes in the Interacting Boson Model

采用相互作用玻色子模型研究了１２８—１５０Ｃｅ同位素核的低能正宇称态的能谱和电磁跃迁．应用简单的哈密顿量很好的描述它们的能谱和Ｅ２跃过．研究表明，这些偶偶Ｃｅ核是属于Ｕ（５）到ＳＵ（３）过渡核，而１４６Ｃｅ以后的核基本是完全的转动核．

The positive parity collective states in the even-even 128-150 Ce isotopes are studial in the framework of the interacting boson model. A schematic Hamiltonian able to describe their spectra and transition is used. It is found that both the light and heavy even Ce isotopes are in the transition from the vibrational limit to the rotational limit. From 146 Ce onward, the isotopes are nearly perfect rotors.