• CHAMOLI S K

      Articles written in Pramana – Journal of Physics

    • Lifetime measurements in the yrast band of the gamma-soft nuclei $^{131}$Ce and $^{133}$Pr

      SINGH R P JOSHI P CHAMOLI S K MURALITHAR S MUKHERJEE G BHOWMIK R K PANCHOLI S C

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      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.

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