Shape evolution in 76,78Kr nuclei at high spins in tilted axis cranking Hartree-Fock-Bogoliubov approach |
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| Authors: | A. Ansari P. Sharma U. R. Jakhar H. L. Yadav |
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| Affiliation: | (1) Institute of Physics, Bhubaneswar, 751 005, India;(2) Department of Physics, Rajasthan University, Jaipur, 302 004, India;(3) Department of Physics, Banaras Hindu University, Varanasi, 221 005, India |
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| Abstract: | 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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| Keywords: | 76,78Kr nuclei high spin states shape evolution tilted axis cranking Hartree-Fock-Bogoliubov theory |
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