High spin band structure in ^(139)Nd  

作　　者：徐强 朱胜江 车兴来 丁怀博 顾龙 竺礼华 吴晓光 刘颖 贺创业 李立华 潘波 郝昕 李广生 

机构地区：[1]Department of Physics, Tsinghua University [2]China Institute of Atomic Energy

出　　处：《Chinese Physics C》2009年第S1期185-187,共3页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10575057, 10775078);Major State Basic Research Development Program (2007CB815005);Special Program of Higher Education Science Foundation (20070003149)

摘　　要：High-spin states in 139Nd nucleus have been reinvestigated with the reaction 128Te (16O, 5n) at a beam energy of 90 MeV. The level scheme has been expanded with spin up to 47/2 . At the low spin states, the yrast collective structure built on the νh11/2-1 multiplet shows a transitional shape with γ ≈ 32° according to calculations of the triaxial rotor-plus-particle model. Three collective oblate bands with γ ～-60° at the high spin states were identified for the first time. A band crossing is observed around ω ～0.4 MeV in one oblate band based on the 25/2-level.High-spin states in 139Nd nucleus have been reinvestigated with the reaction 128Te (16O, 5n) at a beam energy of 90 MeV. The level scheme has been expanded with spin up to 47/2 . At the low spin states, the yrast collective structure built on the νh11/2-1 multiplet shows a transitional shape with γ ≈ 32° according to calculations of the triaxial rotor-plus-particle model. Three collective oblate bands with γ ～-60° at the high spin states were identified for the first time. A band crossing is observed around ω ～0.4 MeV in one oblate band based on the 25/2-level.

关 键 词：high-spin states γ-γ coincidence band crossing oblate band 

分 类 号：O571.2[理学—粒子物理与原子核物理]