Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2009-02-18
Phys.Rev.C80:014305,2009
Physics
Nuclear Physics
Nuclear Theory
13 pages, 11 figures, Submitted to Phys. Rev. C; discussion expanded, figures enlarged
Scientific paper
10.1103/PhysRevC.80.014305
The oblate-prolate shape coexisting/mixing phenomena in proton-rich 68,70,72Se are investigated by means of the adiabatic self-consistent collective coordinate (ASCC) method. The one-dimensional collective path and the collective Hamiltonian describing the large-amplitude shape vibration are derived in a fully microscopic way. The excitation spectra, B(E2) and spectroscopic quadrupole moments are calculated by requantizing the collective Hamiltonian and solving the collective Schroedinger equation. The basic properties of the coexisting two rotational bands in low-lying states of these nuclei are well reproduced. It is found that the oblate-prolate shape mixing becomes weak as the rotational angular momentum increases. We point out that the rotational energy plays a crucial role in causing the localization of the collective wave function in the (beta,gamma) deformation space.
Hinohara Nobuo
Matsuo Masayuki
Matsuyanagi Kenichi
Nakatsukasa Takashi
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