Microscopic description of oblate-prolate shape mixing in proton-rich Se isotopes
- Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 (Japan)
- Theoretical Nuclear Physics Laboratory, RIKEN Nishina Center, Wako 351-0198 (Japan)
- Department of Physics, Faculty of Science, Niigata University, Niigata 950-2181 (Japan)
The oblate-prolate shape coexisting/mixing phenomena in proton-rich {sup 68,70,72}Se 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.
- OSTI ID:
- 21289974
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 80, Issue 1; Other Information: DOI: 10.1103/PhysRevC.80.014305; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
Similar Records
Shape transition and oblate-prolate coexistence in N=Z fpg-shell nuclei
Shape Coexistence in Light Se Isotopes: Evidence for Oblate Shapes