2018 Impact factor 2.481
Hadrons and Nuclei

Eur. Phys. J. A 9, 299-302

Short note

High-spin states in \ensuremath{\mathsf{^{166}Lu}}

Guangyi Zhao1 - Yunzuo Liu1 - Jingbin Lu1 - Yingjun Ma1 - Lichang Yin1 - Xianfeng Li1 - Zhihuan Li1 - Xiaoguang Wu2 - Guangsheng Li2 - Shuxian Wen2 - Chunxiang Yang2

1 Department of Physics, Jilin University, Changchun 130023, People's Republic of China
2 China Institute of Atomic Energy, PO Box 275, Beijing 102413, People's Republic of China

Received: 13 July 2000 / Revised version: 10 November 2000
Communicated by J. Äystö

Abstract
Five rotational bands with configurations $\{\pi 7/2^+ [404] \otimes \nu 5/2^+ [642]\}$ K=6, $\{\pi 9/2^- [514] \otimes \nu 5/2^+ [642]\}$ K=7, $\{\pi 1/2^+ [411] \otimes \nu 5/2^+ [642]\}$ K=2, $\{\pi 1/2^- [541] \otimes \nu 5/2^+ [642]\}$ K=2 and $\{\pi 5/2^+ [402] \otimes \nu 5/2^+ [642]\}$ K=5were populated through the \ensuremath{\mathsf{^{152}Sm}} ( \ensuremath{\mathsf{^{19}F}}, 5n) \ensuremath{\mathsf{^{166}Lu}} reaction at a beam energy of \ensuremath{\mathsf{^{97}Me}}V. The last three bands are identified in the present study. A phase change of level staggering is observed and low-spin signature inversion is suggested in the band $\{\pi 1/2^- [541] \otimes \nu 5/2^+ [642]\}$ K=2. The inversion spin $17.5\hbar$ (spin at inversion point) of this band fits well to the systematic variation trend of inversion spin, increasing with N and decreasing with Z, for the known $\pi 1/2^- [541] \otimes \nu i_{13/2}$ bands observed in odd-odd deformed nuclei around A=170.

PACS
21.10.Re Collective levels - 23.20.Lv Gamma transitions and level energies - 27.70.+q $150\leq A \leq 189$


Copyright Società Italiana di Fisica, Springer-Verlag 2000