Properties of the rotational bands in the transitional nucleus Pt189

W. Hua, X. H. Zhou, Y. H. Zhang, Y. Zheng, M. L. Liu, F. Ma, S. Guo, L. Ma, S. T. Wang, N. T. Zhang, Y. D. Fang, X. G. Lei, Y. X. Guo, M. Oshima, Y. Toh, M. Koizumi, Y. Hatsukawa, B. Qi, S. Q. Zhang, J. Meng, and M. Sugawara
Phys. Rev. C 80, 034303 – Published 3 September 2009

Abstract

High-spin states in Pt189 have been studied experimentally using the Yb176(O18,5n) reaction at beam energies of 88 and 95 MeV. The level scheme of Pt189 has been revised significantly and extended to high-spin states. Rotational bands have been analyzed in the framework of triaxial particle-rotor model, and a γ30° triaxial shape and a near-prolate shape have been proposed to the νi13/21 and νf5/2(p3/2) bands, respectively. Two ΔI=2 transition sequences with similar energies have been observed, and they have been proposed to be associated with the νi13/22νf5/2(p3/2) configuration. The structure built on the νi13/22νf5/2(p3/2) configuration could be interpreted as a pair of pseudospin partners. The level energies in the pseudospin partner bands are well reproduced by the theoretical calculations of the triaxial particle-rotor model if a near-oblate shape is assumed.

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  • Received 12 February 2009

DOI:https://doi.org/10.1103/PhysRevC.80.034303

©2009 American Physical Society

Authors & Affiliations

W. Hua and X. H. Zhou*

  • Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China and Graduate School of the Chinese Academy of Sciences, Beijing 100049, People's Republic of China

Y. H. Zhang, Y. Zheng, M. L. Liu, F. Ma, S. Guo, L. Ma, S. T. Wang, N. T. Zhang, Y. D. Fang, X. G. Lei, and Y. X. Guo

  • Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China

M. Oshima, Y. Toh, M. Koizumi, and Y. Hatsukawa

  • Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan

B. Qi, S. Q. Zhang, and J. Meng

  • School of Physics, and State-Key Lab. Nucl. Phys. & Tech., Peking University, Beijing 100871, People's Republic of China

M. Sugawara

  • Chiba Institute of Technology, Narashino, Chiba 275-0023, Japan

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Vol. 80, Iss. 3 — September 2009

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