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天体演化过程中CNO核子辐射俘获反应
  • ISSN号：1007-4627
  • 期刊名称：原子核物理评论
  • 时间：0
  • 页码：224-229
  • 分类：O571.1[理学—粒子物理与原子核物理;理学—物理]
  • 作者机构：[1]中国原子能科学研究院,北京102413
  • 相关基金：国家自然科学基金资助项目（11021504,10720101076,10735100,10975193）
  • 相关项目：8Li(p,g)9Be天体物理S因子的实验研究
作者： 李云居|李志宏|
关键词： 核天体物理, 辐射俘获反应, 间接测量, 天体物理反应率, nuclear astrophysics, radiative capture reaction, indirect measurement~ astrophysics reactionrate
中文摘要：

C和N核的质子辐射俘获反应对恒星平稳H燃烧阶段的能量产生和元素核合成起重要作用，C，N和O核的中子辐射俘获是原初核合成和AGB星核合成的关键反应，精确测定它们天体物理反应率有重要意义。除13N（P，y）14O和16N（n，y）17N等不稳定核的核子辐射俘获反应外，国际上已完成了其中若干反应的直接测量工作。但12C（p，y）13N，13C（P，7）14N和-sN（p，y）16O等CNO循环关键反应的实验测量还没有达到天体物理感兴趣的能区。13C（n，了）14C，15N（n,7）16N和18O（n，7）19O等中子辐射俘获反应测量的能量跨度较大，截面仍存在较大的不确定性。介绍了这些反应的研究进展，并讨论了间接测量这些反应的方法和可行性。

英文摘要：

The proton radiative capture reactions of C and N nuclei are important for the energy production and nucleosynthesis in the CNO cycle, and the neutron radiative capture reactions of C, N and 0 nuclei are key reactions for the inhomogeneous Big Bang nucleosynthesis as well as for the neutron induced CNO cy- cle in AGB stars. So far, most of these reactions have been measured except some reactions of the unstable nuclei, such as 13N（p, 7）140 and16N（n, 7）17N. While the direct measured reactions, such as the 12C（p, 7）13N, 13C（p, 7）14N and lSN（p, 7）I60 key reactions in CNO cycle, have not reached down to the stellar energies. In addition, the large uncertainties still exist in the measured neutron capture reactions such as laC（n, 7）14C, 15N（n, 7）16N and 180（n, 7）190. Thus it is significant to determine their astrophysical reac- tion rates via the indirect measurements. In this paper, the research status and feasibility of the indirect measurements for these reactions are discussed.

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期刊信息
  • 《原子核物理评论》
  • 中国科技核心期刊
  • 主管单位:中国科学院
  • 主办单位:中国科学院近代物理研究所 中国核物理学会
  • 主编：肖国青
  • 地址：兰州市31号信箱
  • 邮编：730000
  • 邮箱：npr@impcas.ac.cn
  • 电话：0931-4969371/4
  • 国际标准刊号：ISSN：1007-4627
  • 国内统一刊号：ISSN：62-1131/O4
  • 邮发代号:54-183
  • 获奖情况:
  • 2009年1月获甘肃省优秀期刊奖
  • 国内外数据库收录:
  • 美国化学文摘（网络版）,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）,中国北大核心期刊（2000版）
  • 被引量:1602