首页|恒星氦燃烧关键反应12C(α,γ)16O的实验研究

恒星氦燃烧关键反应12C(α,γ)16O的实验研究

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12C(α,γ)16O反应是核天体物理重要核反应之一.该反应通过与3α反应竞争直接影响氦燃烧产生的C和O的丰度比,对于理解恒星演化和生物演化都有重要意义,也对研究黑洞间隙有重要作用,被誉为核天体物理的圣杯反应.本文对该反应的研究现状进行了介绍,并介绍了未来的计划.对该反应的间接测量方法主要有弹性/非弹性散射、β延迟α发射、逆反应和α转移等方法,近年来国际上也有一些直接测量实验研究.然而目前现有12C(α,γ)16O反应直接测量仍无法将测量能区扩展至核天体物理关心的伽莫夫窗口,间接测量结果之间也存在较大分歧,远未达到恒星模型计算要求的10％精度,因此对该反应的测量仍是核天体物理关注的重点.中国原子能科学研究院利用(11B,7Li)转移体系对圣杯反应进行了间接测量,并正在锦屏深地核天体物理实验平台开展直接测量研究,已完成国际最低能区直接测量,未来将向更低的能区发起冲击.
Experimental Research on the Key Reaction of Stellar Helium Burning:12C(α,γ)16O
The 12C(α,γ)16O reaction is one of the most important reactions in nuclear astrophysics.It greatly influences the ratio of the abundances for the carbon and oxygen created at the end of the helium burning by competing with the triple-α pro-cess.It is of great significance for understanding both stellar and biological evolution,as well as for studying black hole gaps.It is called the Holy Grail reaction in nuclear astrophysics.In this article,the current research status of this reaction and future plans were introduced.There are several indirect methods to measure this reaction,such as elastic scattering,β-delayed α de-cay of 16N,inverse reactions and α transfer reactions.In recent years,there were also some direct measurement experiments.However,these studies couldn't make the measurement entering inside the Gamow Window.There are also differences between different indirect measurement results.The uncertainty of this reaction is still much larger than the critical value of 10％,which is required by the nuclear astrophysics calculation.Therefore,the measurement of this reaction remains a focus of attention in nuclear astrophysics.The RNB group in China Institute of Atomic Energy used the(11B,7Li)transfer reaction to study the 12C(α,γ)16O reaction and are working on the direct experiment in Jinping underground nuclear astrophysics laborat-ory.The lowest energy experiment has been finished and the measurement for lower energy will be performed in the future.

nuclear astrophysicsα-transfer reactionunderground laboratory

南巍、郭冰、谌阳平、连钢、苏俊、李云居、樊启文、李志宏、王友宝、颜胜权、廖俊辉、曾晟、张龙、曹富强、李歌星、陈晨、南威克、宋娜、王强、董超、李家英豪、田竣文、张扬、张玉强、周江枫、陈誉文、郭昌鑫、侯江林、蒋宇辰、张智程、朱铭浩、柳卫平

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中国原子能科学研究院,北京 102413

锦屏深地前沿科学及暗物质四川省重点实验室,四川凉山 615000

北京师范大学核科学与技术学院,北京 100875

南方科技大学理学院,广东深圳 518055

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核天体物理 α转移反应 深地实验室

国家重点研发计划项目国家自然科学基金资助项目国家自然科学基金资助项目国家自然科学基金资助项目中核集团青年英才项目稳定支持基础科研计划CNNC Science Fund for Talented Young ScholarsContinuous-Support Basic Scientific Research Proiect

2022YFA16023011212550912005304122225142022YFA1602301

2024

10.11804/NuclPhysRev.41.2023CNPC59

原子核物理评论
中国科学院近代物理研究所，中国核物理学会

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CSTPCD北大核心
影响因子：0.181
ISSN：1007-4627
年,卷(期)：2024.41(1)