Shape coexistence and evolution in neutron-deficient krypton isotopes

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BAI Zhi-Jun, FU Xi-Ming, JIAO Chang-Feng and XU Fu-Rong. Shape coexistence and evolution in neutron-deficient krypton isotopes[J]. Chinese Physics C, 2015, 39(9): 094101. doi: 10.1088/1674-1137/39/9/094101
BAI Zhi-Jun, FU Xi-Ming, JIAO Chang-Feng and XU Fu-Rong. Shape coexistence and evolution in neutron-deficient krypton isotopes[J]. Chinese Physics C, 2015, 39(9): 094101.  doi: 10.1088/1674-1137/39/9/094101 shu
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Received: 2015-03-25
Revised: 1900-01-01
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Shape coexistence and evolution in neutron-deficient krypton isotopes

    Corresponding author: XU Fu-Rong,

Abstract: Total Routhian Surface (TRS) calculations have been performed to investigate shape coexistence and evolution in neutron-deficient krypton isotopes 72,74,76Kr. The ground-state shape is found to change from oblate in 72Kr to prolate in 74,76Kr, in agreement with experimental data. Quadrupole deformations of the ground states and coexisting 02+ states as well as excitation energies of the latter are also well reproduced. While the general agreement between calculated moments of inertia and those deduced from observed spectra confirms the prolate nature of the low-lying yrast states of all three isotopes (except the ground state of 72Kr), the deviation at low spins suggests significant shape mixing. The role of triaxiality in describing shape coexistence and evolution in these nuclei is finally discussed.

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