Explosive Nuclear Burning in the pp-Chain Region and the Breakout Processes

doi:10.1051/epjconf/201610901001

	Explosive Nuclear Burning in the pp-Chain Region and the Breakout Processes
	Kubono, S.1,2,3; Yamaguchi, H.3; Hayakawa, S.3; Hou, S. Q.2; He, J. J.2; Liu, WP ; Li, ZH ; Wang, YB ; Guo, B ; Shen, YP
	2016
卷号	109
DOI	10.1051/epjconf/201610901001
英文摘要	The nuclear reactions in the pp-chain region and on the breakout process from the pp-chain region under very high temperature conditions are reviewed, and some possibilities for experimental investigation are discussed. The reactions discussed could play an important role typically for the primordial nucleosynthesis and supernova nucleosynthesis. Specifically, I discuss here the reactions starting from the two key nuclei, Be-7 and Li-7. The Be-7(n,alpha) reaction, which destroys 7Be, is considered to have a large impact to the primordial Li-7 problem. Our recent estimate of the reaction rate indicates that the reaction rate can be about one order of magnitude smaller than the rate currently adopted, suggesting this channel has a minor effect for the Li-7 problem. Under a proton-rich environment at high temperature like the nu p-process, the Be-7(alpha,gamma) C-11(alpha, p) N-14 pathway is expected to play a majpr role for heavy element synthesis, comparable to the triple alpha process. These two reactions on the pathway were investigated by using low-energy, high-intensity RI beams of Be-7 and C-11. The results support the theoretical prediction of heavy nucleus production at around mass 90-100 by the nu p-process, where the anomalously abundant p-nuclei exist. The reactions on the breakout sequence of Li-7(n,alpha)Li-8(alpha,n)B-11 are also discussed which could paly a crucial role in nuetron-rich envirnments, like in the primirdial universe as well as the early stage of the r-process. The cross sections of the first step reaction Li-7(n,alpha)Li-8 seems well confirmed, but the second step reaction Li-8(alpha,n)B-11 still is not well known yet, whose status of the study is discussed.
会议录	13TH INTERNATIONAL SYMPOSIUM ON ORIGIN OF MATTER AND EVOLUTION OF GALAXIES (OMEG2015)
会议录出版者	E D P SCIENCES
会议录出版地	17 AVE DU HOGGAR PARC D ACTIVITES COUTABOEUF BP 112, F-91944 CEDEX A, FRANCE
语种	英语
WOS研究方向	Astronomy & Astrophysics
WOS记录号	WOS:000372789800001
内容类型	会议论文
源URL	[http://119.78.100.186/handle/113462/57582]
专题	中国科学院近代物理研究所
通讯作者	Kubono, S.
作者单位	1.RIKEN, Nishina Ctr, 2-1 Hirosawa, Wako, Saitama 3510198, Japan 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou, Peoples R China 3.Univ Tokyo, Ctr Nucl Study, 2-1 Hirosawa, Wako, Saitama 3510198, Japan
推荐引用方式 GB/T 7714	Kubono, S.,Yamaguchi, H.,Hayakawa, S.,et al. Explosive Nuclear Burning in the pp-Chain Region and the Breakout Processes[C]. 见:.