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Resonant scattering of Na-22 + p studied by the thick-target inverse-kinematic method
Jin, S. J.; Wang, Y. B.; Su, J.; Yan, S. Q.; Li, Y. J.; Guo, B.; Li, Z. H.; Zeng, S.; Lian, G.; Bai, X. X.; Liu, W. P.; Yamaguchi, H.; Kubono, S.; Hu, J.; Kahl, D.; Jung, H. S.; Moon, J. Y.; Lee, C. S.; Teranishi, T.; Wang, H. W.; Ishiyama, H.; Iwasa, N.; Komatsubara, T.; Brown, B. A.
2013
Source PublicationPHYSICAL REVIEW C
ISSN0556-2813
Volume88Issue:3
AbstractBackground: In presolar low-density graphite grains, an extraordinarily large Ne-22/Ne-20 ratio or even nearly pure Ne-22 is found, pointing to the condensation of radioactive Na-22 in grains. Supernovae and neon-rich novae are the main events that produce Na-22 via the explosive hydrogen burning process. The Na-22(p,gamma)Mg-23 reaction is one of the key reactions that influences the Na-22 abundance in ejecta.Purpose: The present work aims to explore the proton resonant states in Mg-23 relevant to the astrophysical Na-22(p,gamma)Mg-23 reaction. The determined Mg-23 resonant parameters can be used to evaluate the Na-22(p,gamma)Mg-23 reaction rate.Method: A low-energy Na-22 radioactive ion beam is produced via the H-1(Ne-22, Na-22)n reaction, and used to measure the experimental excitation function of the Na-22 + p resonant scattering with a conventional thick-target inverse kinematic method. R-matrix analysis is applied to deduce the Mg-23 resonance parameters from the experimental excitation function.Results: Three proton resonance states in Mg-23 are observed. Spins/parities and the proton partial widths are determined. The deduced excitation energies agree with the compiled values.Conclusions: The new spin and parity assignments allow us to perform a shell-model calculation of the. widths of the Mg-23 resonant states for the evaluation of the Na-22(p,gamma) Mg-23 astrophysical reaction rate. The two s-wave resonant states established in this work at 8.793 and 8.916 MeV in Mg-23, respectively, increase the total reaction rate by about 5% at a temperature greater than 2 GK.
Indexed BySCI
Language英语
Funding Project应物所项目组
WOS IDWOS:000323893200007
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/13885
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Jin, S. J.,Wang, Y. B.,Su, J.,et al. Resonant scattering of Na-22 + p studied by the thick-target inverse-kinematic method[J]. PHYSICAL REVIEW C,2013,88(3).
APA Jin, S. J..,Wang, Y. B..,Su, J..,Yan, S. Q..,Li, Y. J..,...&Brown, B. A..(2013).Resonant scattering of Na-22 + p studied by the thick-target inverse-kinematic method.PHYSICAL REVIEW C,88(3).
MLA Jin, S. J.,et al."Resonant scattering of Na-22 + p studied by the thick-target inverse-kinematic method".PHYSICAL REVIEW C 88.3(2013).
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