Transition strengths and shapes of 2-qp bands in 74Se and 76Kr |
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| Authors: | G Mukherjee P Joshi S N Roy S Datta R P Singh S Muralithar R K Bhowmik |
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| Institution: | (1) Nuclear Science Centre, Post Box 10502, 110 067 New Delhi, India;(2) Department of Physics, Visva-Bharati University, 731 235 Santiniketan, India;(3) Department of Physics, University of Calcutta, 700 009 Calcutta, India |
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| Abstract: | The lifetimes of the states of −ve parity 2-qp bands of N=40 nuclei 74Se and 76Kr were measured. The transition strengths and quadrupole moments, obtained from the lifetimes, show a large collectivity
of such bands in both the nuclei. The alignment frequencies were calculated from Woods-Saxon cranking model. Previously suggested
quasi proton nature of band 5 and 6 of 71Se were argued to be based on quasi neutron excitations. The total Routhian surface calculations suggest triaxial shapes with
large +ve and −ve values of triaxiality parameter γ after proton and neutron alignments in these bands respectively. |
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| Keywords: | Heavy ion γ − γ coincidence DSAM Woods-Saxon cranking TRS |
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