Triaxial Shape, Signature Splitting, and Shape Coexistence in ^(127,129,131)Nd  

作　　者：DONG Bao-Guo MA Hai-Liang YAN Yu-Liang 

机构地区：[1]Department of Nuclear Physics, China Institute of Atomic Energy, P.O. Box 275 （18）, Beijing 102413, China [2]Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Collisions, Lanzhou 730000, China

出　　处：《Communications in Theoretical Physics》2008年第7期187-192,共6页理论物理通讯（英文版）

摘　　要：Signature splitting and shape coexistence at high spin in the neutron deficient nucleus ^129Nd are investigated with the configuration-dependent cranked Nilsson-Strutinsky approach. The calculated bands are compared with the observed signature partner bands and very good agreement results at high spin are obtained. The observed deformed bands are confirmed as normal and highly deformed and their properties are explained theoretically. Terminating states in ^129Nd and other terminations are predicted. There is shape coexistence within the same configuration from lowspin states to high-spin states. Possible normal and highly deformed bands with rotation around the intermediate principal axis in several interesting configurations of ^129Nd are discussed. The experimental results for ^131Nd are simply discussed and the calculated bands are in good agreement with observed bands at high spin. TriaxiM shapes in ^127 Nd with a triaxial deformation of γ -12° are predicted and should be observed experimentally. The value of negative γ of π（h11/2）^4v（h11/2）^7 configuration increases with neutron number increasing in ^127,129,131Nd. The triaxial shape evolutions with neutron number increasing in ^127,129,131Nd and in ^126,128,130,132pr are explained by the strong driving force of specified single particle orbitals towards to triaxial shape.

关 键 词：rotational structure triaxial shape signature splitting CONFIGURATION 

分 类 号：O41[理学—理论物理]