Spin-dependent γ softness or triaxiality in even-even^(132-138) Nd nuclei  

作　　者：柴清祯 王华磊 杨琼 柳敏良 

机构地区：[1]School of Physics and Engineering, Zhengzhou University [2]Institute of Modern Physics, Chinese Academy of Sciences

出　　处：《Chinese Physics C》2015年第2期28-33,共6页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(10805040,11175217);Foundation and Advanced Technology Research Program of Henan Province(132300410125);S&T Research Key Program of Henan Province Education Department(13A140667)

摘　　要：The properties of γ instability in rapidly rotating even-even132-138 Nd isotopes have been investigated using the pairing-deformation self-consistent total-Routhian-surface calculations in a deformation space of（β2, γ,β4）. It is found that even-even134-138 Nd nuclei exhibit triaxiality in both ground and excited states, even up to high-spin states. The lightest isotope possesses a well-deformed prolate shape without a γ deformation component.The current numerical results are compared with previous calculations and available observables such as quadrupole deformation β2 and the feature of γ-band levels, showing basically a general agreement with the observed trend ofγ correlations（e.g. the pattern of the odd-even energy staggering of the γ band）. The existing differences between theory and experiment are analyzed and discussed briefly.The properties of γ instability in rapidly rotating even-even132-138 Nd isotopes have been investigated using the pairing-deformation self-consistent total-Routhian-surface calculations in a deformation space of（β2, γ,β4）. It is found that even-even134-138 Nd nuclei exhibit triaxiality in both ground and excited states, even up to high-spin states. The lightest isotope possesses a well-deformed prolate shape without a γ deformation component.The current numerical results are compared with previous calculations and available observables such as quadrupole deformation β2 and the feature of γ-band levels, showing basically a general agreement with the observed trend ofγ correlations（e.g. the pattern of the odd-even energy staggering of the γ band）. The existing differences between theory and experiment are analyzed and discussed briefly.

关 键 词：even-even nucleus total-Routhian-surface calculation γ softness triaxial deformation 

分 类 号：O571[理学—粒子物理与原子核物理]