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基于广义约化R矩阵理论，使用RAC程序(R-matrix Analysis code)综合分析了6He系统中所有可以利用的实验数据，给出了氚核入射10-2~20 MeV能量范围内主要反应道的评价核数据。其中积分截面包括T (t,2n)4He、T (t,n)5He、T (t,d)4H；微分截面包括T (t,2n)4He、T (t,n)5He、T (t,d)4H、T (t,t) T。结果表明，RAC的评价结果与实验数据和ENDF/B-VIII.1的评价数据整体符合良好。重点关注T (t,2n)4He反应，评价值在10-2~20 MeV范围内与已有实验数据一致，在2.9 MeV附近出现由2+能级主导的共振，在1.9 MeV处，已有实验同时测量了积分截面和角分布，本工作的评价结果在两类数据上均表现出良好的一致性，积分截面与微分截面的联合约束有效提升了R矩阵参数的稳定性和评价结果的可靠性。基于6He系统的整体评价，进一步补充了T (t,n)5He、T (t,d)4H反应的截面数据。本工作完善了聚变反应相关的数据基础，并为后续与镜像系统6Be系统的联合分析奠定了基础。
本文数据集可在科学数据银行数据库https://www.doi.org/10.57760/sciencedb.j00213.00202中访问（审稿阶段请通过私有访问链接查看本文数据集https://www.scidb.cn/s/7jMryq）-
关键词:
- R矩阵理论 /
- 聚变反应截面 /
- 6He系统 /
- T(t,2n)4He反应
Based on the generalized reduced R-matrix theory, this work performs a comprehensive analysis of all available experimental data for the 6He system using the RAC (R-matrix Analysis Code). A complete set of evaluated nuclear data has been obtained for major reaction channels induced by triton beams in the energy range of 10-2 ~ 20 MeV. The evaluated integral cross sections include T(t,2n)4He, T(t,n)5He, and T(t,d)4H reactions; the differential cross sections include T(t,2n)4He, T(t,n)5He, T(t,d)4H, and T(t,t)T. The evaluation results show good agreement with experimental data and the evaluated data of ENDF/B-VIII.1. In particular, for the T(t,2n)4He reaction, the evaluated cross sections are consistent with existing experiments over the full energy range, and a resonance dominated by the 2+ level is observed near 2.9 MeV. At 1.9 MeV, where experimental measurements of both integral cross sections and angular distributions are available, the evaluation reproduces both observables well. The combined constraint of integral and differential data significantly improves the stability of R-matrix parameters and the reliability of the evaluation. Based on the global analysis of the 6He system, this work also provides supplementary cross section data for the T(t,n)5He and T(t,d)4H reactions. The results contribute to the nuclear data foundation for fusion-related reactions and lay the groundwork for future joint evaluation with the mirror 6Be system.
The datasets presented in this paper, including the ScienceDB, are openly available at https://www.doi.org/10.57760/sciencedb.j00213.00202 (Please use the private access link https://www.scidb.cn/s/7jMryq to access the dataset during the peer review process)-
Keywords:
- R-matrix theory /
- fusion reaction cross sections /
- 6He system /
- T(t,2n)4He reaction
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