A Ansari
Articles written in Pramana – Journal of Physics
Volume 60 Issue 6 June 2003 pp 1171-1178
High-spin structure of neutron-rich Dy isotopes
A Ansari H L Yadav M Kaushik U R Jakhar
In view of recent experimental progress on production and spectroscopy of neutron-rich isotopes of Dy with mass number A =166 and 168, we have made theoretical investigations on the structure of high spin states of164-170Dy isotopes in the cranked Hartree-Fock-Bogoliubov (CHFB) theory employing a pairingquadrupolehexadecapole model interaction. With the increase of neutron number the rotation alignment of the proton orbitals dominates the structure at high spins, which is clearly reflected in the spin dependence of the rotational g-factors. A particularly striking feature is the difference in the spin-dependent properties of166Dy as compared to that of164Dy
Volume 65 Issue 6 December 2005 pp 1041-1051
Structure of high spin states of76Kr and78Kr nuclei
Following a fully self-consistent cranked Hartree-Fock-Bogoliubov (CHFB) approach with a pairing+quadrupole+hexadecapole model interaction Hamiltonian the structure of the yrast states of76,78Kr nuclei is studied up to angular momentum
Volume 68 Issue 1 January 2007 pp 105-110 Brief Reports
A Ansari P Sharma U R Jakhar H L Yadav
A two-dimensional tilted axis cranking Hartree–Fock–Bogoliubov (CHFB) calculation is performed for 76Kr and 78Kr nuclei up to high spins $J = 30$ employing a pairing-plus-quadrupole (PPQ) model interaction Hamiltonian. Intricate details of the evolution of single particle structures and shapes as a function of spin have been investigated. The results show the existence of energy levels with high 𝐾 quantum numbers lying close to the yrast line in both the nuclei. Such high 𝐾 states should exhibit isomeric characteristics due to the 𝐾-selection rules for the 𝛾-decays. Moreover, in 78Kr a new band with $J = 20–30$ lying below the observed ground band is predicted.
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