Resonant scattering of Na-22 + p studied by the thick-target inverse-kinematic method

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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.
刊名	PHYSICAL REVIEW C
	2013
卷号	88 期号:3
ISSN号	0556-2813
英文摘要	Background: 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.
收录类别	SCI
语种	英语
WOS记录号	WOS:000323893200007
公开日期	2014-06-13
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/13885]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式 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).