Abstract
Using Woods-Saxon potentials and the eigenphase formalism for one-particle resonances, one-particle bound and resonant levels for neutrons as a function of quadrupole deformation are presented, which are supposed to be useful for the interpretation of spectroscopic properties of some light neutron-rich nuclei with weakly bound neutrons. Compared with Nilsson diagrams in textbooks that are constructed using modified oscillator potentials, we point out a systematic change of the shell structure in connection with both weakly bound and resonant one-particle levels related to small orbital angular momenta . Then, it is seen that weakly bound neutrons in nuclei such as and may prefer being deformed as a result of the Jahn-Teller effect, due to the near degeneracy of the levels and the levels in the spherical potential, respectively. Furthermore, the absence of some one-particle resonant levels compared with the Nilsson diagrams in textbooks is illustrated.
- Received 16 July 2007
DOI:https://doi.org/10.1103/PhysRevC.76.054319
©2007 American Physical Society