Elastic scattering of Al-25 + p to explore the resonance structure in Si-26
- Authors
- Jung, H. S.; Lee, C. S.; Kwon, Y. K.; Moon, J. Y.; Lee, J. H.; Yun, C. C.; Kim, M. J.; Hashimoto, T.; Yamaguchi, H.; Kahl, D.; Kubono, S.; Wakabayashi, Y.; Togano, Y.; Choi, Seonho; Kim, Y. H.; Kim, Y. K.; Park, J. S.; Kim, E. J.; Moon, C. -B.; Teranishi, T.; Iwasa, N.; Yamada, T.; Kato, S.; Cherubini, S.; Hayakawa, S.; Rapisarda, G. G.
- Issue Date
- Sep-2014
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW C, v.90, no.3, pp.1 - 8
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW C
- Volume
- 90
- Number
- 3
- Start Page
- 1
- End Page
- 8
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/159265
- DOI
- 10.1103/PhysRevC.90.035805
- ISSN
- 0556-2813
- 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.
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