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Low-lying 2(+) states generated by pn-quadrupole correlation and N=28 shell quenching
| Title: | Low-lying 2(+) states generated by pn-quadrupole correlation and N=28 shell quenching |
| Authors: | Ebata, Shuichiro Browse this author | | Kimura, Masaaki Browse this author →KAKEN DB |
| Issue Date: | 13-Jan-2015 |
| Publisher: | American Physical Society |
| Journal Title: | Physical Review C |
| Volume: | 91 |
| Issue: | 1 |
| Start Page: | 14309 |
| Publisher DOI: | 10.1103/PhysRevC.91.014309 |
| Abstract: | The quadrupole vibrational modes of neutron-rich N = 28 isotones (Ca-48, Ar-46, S-44, and Si-42) are investigated by using the canonical-basis time-dependent Hartree-Fock-Bogoliubov theory with several choice of energy density functionals, including nuclear pairing correlation. It is found that the quenching of the N = 28 shell gap and the proton holes in the sd shell trigger quadrupole correlation and increase the collectivity of the low-lying 2(+) state in Ar-46. It is also found that the pairing correlation plays an important role to increase the collectivity. We also demonstrate that the same mechanism to enhance the low-lying collectivity applies to other N = 28 isotones S-44 and Si-42, and it generates a couple of low-lying 2(+) states which can be associated with the observed 2(+) states. |
| Rights: | ©2015 American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/58432 |
| 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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