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Cluster states and isoscalar monopole transitions of Mg-24
| Title: | Cluster states and isoscalar monopole transitions of Mg-24 |
| Authors: | Chiba, Y. Browse this author | | Kimura, M. Browse this author →KAKEN DB |
| Issue Date: | 4-Jun-2015 |
| Publisher: | American Physical Society |
| Journal Title: | Physical review C |
| Volume: | 91 |
| Issue: | 6 |
| Start Page: | 061302-1 |
| Publisher DOI: | 10.1103/PhysRevC.91.061302 |
| Abstract: | Background: Isoscalar monopole transition has been suggested as a key observable to search for exotic cluster states. Recently, excited 0(+) states with strong isoscalar monopole transition strengths were experimentally reported in Mg-24, but their structures were not revealed because of the lack of theoretical analysis. Purpose: We study the structure of the excited 0(+) states of Mg-24 populated by isoscalar monopole transition from the ground state, and identify their cluster configurations. Method: The 0(+) states of Mg-24 and their isoscalar monopole transition strengths from the ground state are calculated with antisymmetrized molecular dynamics combined with the generator coordinate method using the Gogny D1S interaction. Results: The calculated isoscalar monopole strength function shows reasonable agreement with experiment and is consistent with other theoretical calculations. The structures of the excited 0(+) states with pronounced isoscalar monopole transitions are analyzed. It is found that the 0(2)(+), 0(3)(+), and 0(5)(+) states have mixed nature of mean-field and cluster, and that the 0(8)(+) state is dominated by a C-12 + C-12 cluster configuration. In addition, it is predicted that 5 alpha-pentagon + alpha states appear around 23 MeV. Conclusions: The excited 0(+) states which appear as the prominent peaks in the calculated strength function are associated with Ne-20 + alpha, C-12 + C-12, and 5 alpha-pentagon+alpha cluster states. |
| Rights: | ©2013 American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/59548 |
| 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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