Microscopic Dynamics of Shape Coexistence Phenomena around 68Se and 72Kr

Details Microscopic Dynamics of Shape Coexistence Phenomena around 68Se and 72Kr Microscopic Dynamics of Shape Coexistence Phenomena around 68Se and 72Kr

2007-09-25

arxiv.org/abs/0709.3897v1

Physics

Nuclear Physics

Nuclear Theory

10 pages, 4 figures, Talk given at The International Symposium on Physics of Unstable Nuclei (ISPUN07), Hoi An, Vietnam, 3-7 J

Scientific paper

The adiabatic self-consistent collective coordinate (ASCC) method is applied to the pairing-plus-quadrupole (P + Q) model Hamiltonian including the quadrupole pairing, and the oblate-prolate shape coexistence phenomena in proton-rich nuclei, 68Se and 72Kr, are investigated. It is shown that the collective path connecting the oblate and prolate local minima runs along a triaxial valley in the beta-gamma plane. Quantum collective Hamiltonian is constructed and low-lying energy spectra and E2 transition probabilities are calculated for the first time using the ASCC method. Basic properties of the shape coexistence/mixing are well reproduced. We also clarify the effects of the time-odd pair field on the collective mass (inertial function) for the large-amplitude vibration and on the rotational moments of inertia about three principal axes.

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