2009•Chinese Physics CRequires access
High spin band structure in 139 Nd
Q. Xu, Zhu Sheng-Jiang, Che Xing-Lai, Ding Huai-Bo, Gu Long, Zhu Li-Hua, Xiaoguang Wu, Ying Liu, Chuangye He, Lihua Li, Bo Pan, Hao Xin, Guangsheng Li
Open publisher page 0 citations
Abstract
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 ħ. At the low spin states, the yrast collective structure built on the vh11/2−1 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 ħω ~0.4 MeV in one oblate band based on the 25/2− level.