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Elastic scattering of Al-25 + p to explore the resonance structure in Si-26

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Title
Elastic scattering of Al-25 + p to explore the resonance structure in Si-26
Author(s)
Jung H.S.; Lee C.S.; Young Kwan Kwon; Jun Young Moon; Ju Hahn Lee; Chong Cheoul Yun; Myeongjin Kim; Hashimoto T.; Yamaguchi H.; Kahl D.; Kubono S.; Wakabayashi Y.; Togano Y.; Choi S.; Kim Y.H.; Yong Kyun Kim; Park J.S.; Kim E.J.; Moon C.-B.; Teranishi T.; Iwasa N.; Yamada T.; Kato S.; Cherubini S.; Hayakawa S.; Rapisarda G.G.
Publication Date
2014-09
Journal
Physical Review C - Nuclear Physics, v.90, no.3, pp.035805-1 - 035805-8
Publisher
American Physical Society
Abstract
Background: The properties of resonances in Si-26 are important to better constrain the Al-25(p,gamma)Si-26 reaction rate relevant to the synthesis of galactic Al-26(gs) and energy generation in explosive stellar environment at higher temperature. Purpose: Al-25 + p elastic scattering was measured to further constrain and investigate disagreements in resonance parameters for the high-lying excited states of Si-26 with high statistics and without background contamination within the target. Methods: The experiment was performed by bombarding a thick H-2 target with an Al-25 radioactive ion beam. The resonances at excitation energies of 6.6-8.3 MeV in the Si-26 compound nucleus were studied at the low-energy radioactive-ion beam facility CRIB (Center for Nuclear Study Radioactive Ion Beam separator) at the University of Tokyo. Results: Six resonant states were observed and their resonance parameters were extracted by an R-matrix analysis. Our resonance parameters for two levels are in good agreement with the results of previous studies, while for four others, excitation energy, proton partial width, and spin-parity assignment disagree with the results of recent study via elastic scattering of Al-25 + p. Conclusion: The parameters of resonant states in Si-26 determined in the present work for the Al-25(p,gamma)Si-26 reaction rate are consistent with that of the previous result, solving spin-parity assignment discrepancies between experiments, relevant at higher temperatures.
URI
https://pr.ibs.re.kr/handle/8788114/2943
DOI
10.1103/PhysRevC.90.035805
ISSN
0556-2813
Appears in Collections:
HiddenCommunity > 1. Journal Papers (저널논문)
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