Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2005-12-15
Nucl.Phys. A768 (2006) 61-79
Physics
Nuclear Physics
Nuclear Theory
22 pages, 7 figures
Scientific paper
10.1016/j.nuclphysa.2006.01.008
By means of the mixed representation RPA based on the Skyrme-Hartree-Fock mean field, we investigate low-frequency octupole excitations built on the superdeformed (SD) states in the N=Z nuclei around 40Ca and the neutron-rich Sulfur isotopes. The RPA calculation is carried out fully self-consistently on the three-dimensional Cartesian mesh in a box, and yields a number of low-frequency octupole vibrations built on the SD states in 32S, 36Ar, 40Ca and 44Ti. In particular, a strongly collective K^\pi=1^- octupole vibration is suggested to appear on top of the SD state in 40Ca. For 48,50S close to the neutron drip line, we find that the low-lying state created by the excitation of a single neutron from a loosely bound low Omega level to a high Omega resonance level acquires an extremely strong octupole transition strength due to the spatially very extended structure of the particle-hole wave functions.
Hashimoto Yoshiaki
Imagawa H.
Inakura Tsunenori
Matsuyanagi Kenichi
Mizutori Shoujirou
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