Low-spin signature inversion in the πh9/2νi13/2 oblate band of Tl190

C. Y. Xie, X. H. Zhou, Y. H. Zhang, Y. X. Guo, X. G. Lei, Y. Zheng, M. L. Liu, L. T. Song, H. L. Wang, W. T. Guo, H. P. Yu, L. H. Zhu, X. G. Wu, and F. R. Xu
Phys. Rev. C 72, 044302 – Published 12 October 2005

Abstract

High-spin states in Tl190 have been studied experimentally by using the Gd160(Cl35,5n) fusion-evaporation reaction at beam energies of 167 and 175 MeV. A rotational band built on the πh9/2νi13/2 configuration with oblate deformation has been established for Tl190. Spin values are assigned by adopting the results from αγ decay work for Bi194 found in the literature. With the configuration and spin-parity assignments, the low-spin signature inversion has been revealed for the πh9/2νi13/2 oblate band in Tl190. It is the first experimental observation of low-spin signature inversion for a band associated with the oblate πh9/2νi13/2 configuration. The low-spin signature inversion for the oblate πh9/2νi13/2 band can be interpreted by the two-quasiparticle-plus-rotor model including a J-dependent pn residual interaction.

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  • Received 24 November 2004

DOI:https://doi.org/10.1103/PhysRevC.72.044302

©2005 American Physical Society

Authors & Affiliations

C. Y. Xie1,2, X. H. Zhou1,2,*, Y. H. Zhang1, Y. X. Guo1, X. G. Lei1, Y. Zheng1, M. L. Liu1, L. T. Song1, H. L. Wang1, W. T. Guo1, H. P. Yu1, L. H. Zhu3, X. G. Wu3, and F. R. Xu4

  • 1Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
  • 2Graduate School of the Chinese Academy of Sciences, Beijing 100049, China
  • 3China Institute of Atomic Energy, Beijing 102413, China
  • 4Department of Technical Physics and MOE Key Laboratory, Peking University, Beijing 100871, China

  • *Electronic address: zxh@impcas.ac.cn

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Vol. 72, Iss. 4 — October 2005

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