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    • Abstract

       

      Lifetimes of excited states in the yrast band of the gamma-soft nuclei $^{131}$Ce and 133Pr have been measured using the recoil distance Doppler shift and Doppler shift attenuation methods. The yrast bands in $^{131}$Ce and $^{133}$Pr are based on odd decoupled neutron $νh_{11/2}$ high $\Omega$ and proton $\pi h_{11/2}$ low $\Omega$ orbitals, respectively. Thetriaxiality parameter extracted from the experimentally deduced values of transition quadrupole moments, within the framework of cranked Hartree–Fock–Bogoliubov (CHFB) and total Routhian surface (TRS) calculatons, is$\gamma ~ −80{^o}$ for the band in $^{131}$Ce at high spins, while for the band in $^{133}$Pr, the value of $\gamma$ is close to $0^{o}$. Thisagrees well with the $\gamma$ shape polarization property of high and low $\Omega_{11/2}$ orbitals in these gamma-soft nuclei.

    • Author Affiliations

       

      SINGH R P1 JOSHI P2 CHAMOLI S K3 MURALITHAR S1 MUKHERJEE G4 BHOWMIK R K5 PANCHOLI S C3

      1. Inter University Accelerator Centre (IUAC), P.O. Box 10502, New Delhi 110 067, India
      2. Department of Physics, University of York, Heslington, York Y0105DD, United Kingdom
      3. Department of Physics and Astrophysics, University of Delhi, Delhi 110 007, India
      4. Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India
      5. IIEST, West Bengal, India
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  • Pramana – Journal of Physics | News

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