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Virtual-state character of the Be-9 1/2(+) state in the Be-9(γ,n)Be-8 reaction
| Title: | Virtual-state character of the Be-9 1/2(+) state in the Be-9(γ,n)Be-8 reaction |
| Authors: | Odsuren, Myagmarjav Browse this author | | Kikuchi, Yuma Browse this author | | Myo, Takayuki Browse this author | | Aikawa, Masayuki Browse this author →KAKEN DB | | Kato, Kiyoshi Browse this author →KAKEN DB |
| Issue Date: | 27-Jul-2015 |
| Publisher: | American Physical Society |
| Journal Title: | Physical review C |
| Volume: | 92 |
| Issue: | 1 |
| Start Page: | 14322 |
| Publisher DOI: | 10.1103/PhysRevC.92.014322 |
| Abstract: | We study the character of the first excited 1/2(+) state of Be-9, which is observed as a low-lying sharp peak in the cross section of Be-9(γ,n)2(4)He just above the Be-8 + n threshold. Using the alpha + alpha + n three-body model, we describe the ground and excited unbound states of Be-9 above the alpha + alpha + n threshold. Applying the complex scaling method to the three-body model, we find no 1/2(+) resonant solutions with the scaling angle of theta <= 15 degrees, while the low-lying peak in the photodisintegration cross section is reproduced in the present calculation. It is found that the Be-8 + n continuum states dominate the low-lying peak in the cross section. Furthermore, using the analytical continuation of the coupling constant of the three-body interaction for the alpha + alpha + n system, we discuss the virtual-state character of the 1/2(+) state. |
| Rights: | ©2015 American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/59826 |
| 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: 合川 正幸
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