Bayesian analysis on non-resonant behavior of 12C+12C fusion reaction at sub-barrier energies  

作　　者：Tian-Peng Luo Pei-Wei Wen Cheng-Jian Lin Lei Yang Hui-Ming Jia Feng Yang Da-Hu Huang Chang Chang Ming-Hao Zhang Yun Yang Teng-Huan Mo Nan-Ru Ma 骆天鹏;温培威;林承键;杨磊;贾会明;杨峰;黄大湖;常昶;张明昊;杨赟;莫腾欢;马南茹(China Institute of Atomic Energy,Beijing 102413,China;College of Physics and Technology&Guangxi Key Laboratory of Nuclear Physics and Technology,Guangxi Normal University,Guilin 541004,China)

机构地区：[1]China Institute of Atomic Energy,Beijing 102413,China [2]College of Physics and Technology&Guangxi Key Laboratory of Nuclear Physics and Technology,Guangxi Normal University,Guilin 541004,China

出　　处：《Chinese Physics C》2022年第6期174-182,共9页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China(11635015,11805280,U1732145,11705285,U1867212,11961131012);the Continuous Basic Scientific Research Project(WDJC-2019-13);the Young Talent Development Foundation(YC212212000101);the Leading Innovation Project(LC192209000701,LC202309000201)。

摘　　要：Controversies exist among experiments and theories on the S^(*)factor of the astrophysical important reaction ^(12)C+^(12)C for energies below 3 MeV.Only frequentist approaches have been used so far for data analysis,and the confidence levels or theoretical errors are not available from previous theoretical predictions.In this study,the Bayesian method is employed to provide theoretical predictions and its 1σconfidence level based on all the currently available experimental data for the first time.The improved coupled-channels model CCFULL-FEM implemented with the finite element method as well as the Markov chain Monte Carlo approach emcee are adopted to analyze the non-resonant behavior of this reaction.The posterior distribution of the Woods-Saxon potential parameters is investigated.Compared with the widely used frequentist method MIGRAD within the Minuit minimization program,the Bayesian method has a significant advantage for exploring the potential parameter space.When the existing experimental data measured down to subbarrier energies are considered,the potential parameters are constrained to a very narrow range,and the predictions of the S^(*) factor showed no sharp decrease in the low-energy region.

关 键 词：Bayesian method coupled channels method carbon fusion reaction astrophysical S-factor 

分 类 号：TL61[核科学技术—核技术及应用]