High spin band structure in 139Nd
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 h. At the low spin states,the yrast collective structure built on the vh(-1)(11/2) 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 hw ～0.4 MeV in one oblate band based on the 25/2-level.
high-spin states, γ-γ coincidence, band crossing, oblate band
XU Qiang LI Li-Hua PAN Bo HAO Xin LI Guang-Sheng ZHU Sheng-Jiang CHE Xing-Lai DING Huai-Bo GU Long ZHU Li-Hua WU Xiao-Guang LIU Ying HE Chuang-Ye
Department of Physics, Tsinghua University, Beijing 100084, China China Institute of Atomic Energy, Beijing 102413, China
国际会议
重庆
英文
185-187
2008-05-10（万方平台首次上网日期，不代表论文的发表时间）