The first excited 1/2+ state in 9Be and 9B
Nuclear states observed around threshold energies provide us with interesting problems associated with the nuclear cluster structure [1, 2, 3, 4]. The first excited Jπ = 1/2+ state of 9Be [5], which is an α+ α + n Borromean nucleus, is one of the typical examples in light nuclei. This state of 9Be...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Al-Farabi Kazakh National University
2019-07-01
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| Series: | Physical Sciences and Technology |
| Online Access: | http://phst/index.php/journal/article/view/164 |
| _version_ | 1797645315671588864 |
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| author | M. Odsuren Y. Kikuchi T. Myo K. Kato |
| author_facet | M. Odsuren Y. Kikuchi T. Myo K. Kato |
| author_sort | M. Odsuren |
| collection | DOAJ |
| description |
Nuclear states observed around threshold energies provide us with interesting problems associated with
the nuclear cluster structure [1, 2, 3, 4]. The first excited Jπ = 1/2+ state of 9Be [5], which is an α+ α + n
Borromean nucleus, is one of the typical examples in light nuclei. This state of 9Be has been observed as a
sharp peak above the 8Be + n threshold energy in the photo-disintegration cross section of γ+9Be→ α + α
+ n [6, 7]. The strength of the peak has a strong influence on the reaction rate of the 9Be synthesis. We
performed the calculations using an α + α + n three-body model [8, 9] and the complex scaling method
(CSM), which well reproduces the observed photo-disintegration cross section. However, the result
indicates that the 1/2+ state shows the s-wave virtual-state character of 8Be+n. In addition to this problem,
we discuss a mirror state problem of the first excite 1/2+ state in 9B.
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| first_indexed | 2024-03-11T14:44:36Z |
| format | Article |
| id | doaj.art-ad496ffc25f645e099efd09f317a5132 |
| institution | Directory Open Access Journal |
| issn | 2409-6121 |
| language | English |
| last_indexed | 2024-03-11T14:44:36Z |
| publishDate | 2019-07-01 |
| publisher | Al-Farabi Kazakh National University |
| record_format | Article |
| series | Physical Sciences and Technology |
| spelling | doaj.art-ad496ffc25f645e099efd09f317a51322023-10-30T13:11:04ZengAl-Farabi Kazakh National UniversityPhysical Sciences and Technology2409-61212019-07-0161-2The first excited 1/2+ state in 9Be and 9BM. OdsurenY. KikuchiT. MyoK. Kato Nuclear states observed around threshold energies provide us with interesting problems associated with the nuclear cluster structure [1, 2, 3, 4]. The first excited Jπ = 1/2+ state of 9Be [5], which is an α+ α + n Borromean nucleus, is one of the typical examples in light nuclei. This state of 9Be has been observed as a sharp peak above the 8Be + n threshold energy in the photo-disintegration cross section of γ+9Be→ α + α + n [6, 7]. The strength of the peak has a strong influence on the reaction rate of the 9Be synthesis. We performed the calculations using an α + α + n three-body model [8, 9] and the complex scaling method (CSM), which well reproduces the observed photo-disintegration cross section. However, the result indicates that the 1/2+ state shows the s-wave virtual-state character of 8Be+n. In addition to this problem, we discuss a mirror state problem of the first excite 1/2+ state in 9B. http://phst/index.php/journal/article/view/164 |
| spellingShingle | M. Odsuren Y. Kikuchi T. Myo K. Kato The first excited 1/2+ state in 9Be and 9B Physical Sciences and Technology |
| title | The first excited 1/2+ state in 9Be and 9B |
| title_full | The first excited 1/2+ state in 9Be and 9B |
| title_fullStr | The first excited 1/2+ state in 9Be and 9B |
| title_full_unstemmed | The first excited 1/2+ state in 9Be and 9B |
| title_short | The first excited 1/2+ state in 9Be and 9B |
| title_sort | first excited 1 2 state in 9be and 9b |
| url | http://phst/index.php/journal/article/view/164 |
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