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Collectivity and instability of the N = Z=28 shell gap and strongly deformed bands with g(9/2) configuration in Ni-56
| Title: | Collectivity and instability of the N = Z=28 shell gap and strongly deformed bands with g(9/2) configuration in Ni-56 |
| Authors: | Chiba, Y. Browse this author | | Kimura, M. Browse this author →KAKEN DB |
| Issue Date: | 13-May-2014 |
| Publisher: | American Physical Society |
| Journal Title: | Physical Review C |
| Volume: | 89 |
| Issue: | 5 |
| Start Page: | 054313 |
| Publisher DOI: | 10.1103/PhysRevC.89.054313 |
| Abstract: | The positive-parity excited states of Ni-56 and instability of the N = Z = 28 shell gap are discussed on the basis of the antisymmetrized molecular dynamics calculation using the Gogny D1S effective interaction. It is found that Ni-56 is quite soft against oblate deformation and the N = Z = 28 closed-shell configuration amounts to only 62% in the ground state. It is also found that the shell gap easily disappears by prolate deformation, which leads to the coexistence of the almost spherical ground band, excited beta and gamma bands, and a prolate superdeformed band with (f(7/2))(-m)(p(3/2))(m) configurations within the small excitation energies. Furthermore, in the highly excited region, it is predicted that a couple of strongly deformed bands with (sd)(-m)(pf)(-n)(g(9/2))(m+n) configurations are built on the 0(+) states around 20 MeV. |
| Rights: | ©2014 American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/56531 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 木村 真明
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