Lifetime measurements in Pt180

Q. M. Chen, X. G. Wu, Y. S. Chen, C. B. Li, Z. C. Gao, G. S. Li, F. Q. Chen, C. Y. He, Y. Zheng, S. P. Hu, J. Zhong, Y. H. Wu, H. W. Li, and P. W. Luo
Phys. Rev. C 93, 044310 – Published 12 April 2016

Abstract

Lifetimes of the yrast states in Pt180 have been measured from 4+ to 8+ using the recoil distance Doppler-shift technique in the coincidence mode. These states were populated by the reaction Gd156(Si28,4n)Pt180 at a beam energy of 144 MeV. The differential decay curve method was applied to determine the lifetimes from experimental coincidence data. The B(E2) values extracted from lifetimes increase with increasing spin, implying rotor behavior, but do not show the typical shape coexistence where the B(E2) values present a rapid increase at very low spins. Calculations based on the triaxial projected shell model were performed for the yrast states in Pt180 and the results of both energies and E2 transition probabilities reproduce the experimental data very well. The result also shows that a better description of the yrast band in Pt180 requires consideration of the γ degree of freedom.

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  • Received 18 August 2015
  • Revised 11 March 2016

DOI:https://doi.org/10.1103/PhysRevC.93.044310

©2016 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Q. M. Chen1, X. G. Wu1,*, Y. S. Chen1, C. B. Li1, Z. C. Gao1,†, G. S. Li1, F. Q. Chen1, C. Y. He1, Y. Zheng1, S. P. Hu1, J. Zhong1,2, Y. H. Wu1,3, H. W. Li1,3, and P. W. Luo1,2

  • 1China Institute of Atomic Energy, Beijing 102413, China
  • 2College of Physics and Technology, Shenzhen University, Shenzhen 518060, China
  • 3College of Physics, Jilin University, Changchun 130012, China

  • *Corresponding author: wxg@ciae.ac.cn
  • Corresponding author: zcgao@ciae.ac.cn

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Issue

Vol. 93, Iss. 4 — April 2016

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