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Virtual-state character of the Be-9 1/2(+) state in the Be-9(γ,n)Be-8 reaction

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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
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)

Submitter: 合川 正幸

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