物理学报2026，Vol.75Issue(9)：83-92,10.DOI:10.7498/aps.75.20251643
70-250 keV能区D-D聚变反应截面的实验测量
D-D fusion reaction cross-section measurement in 70-250 keV energy range
摘要
Abstract
An experimental measurement of the D-D fusion reaction cross-sections in the energy range of 70 to 250 keV is carried out at the neutron generator.A fusion reaction chamber with eight angles and a thin deuterated polystyrene target are used in the experiment.The passivated implanted planar silicon(PIPS)detectors are used to detect the products of charged-particle fusion reactions,and a high-precision digital electrometer is employed to measure the beam current from the target. The differential cross-sections at six energies in the energy range are measured.The Legendre polynomials are used to fit the experimental differential cross-sections in the center-of-mass frame.According to the fitting results,the integral cross-sections at different energies are extracted.The differential and integral cross-sections at different energies are compared with historical experimental results and the evaluation data from the ENDF/B-Ⅷ.0 database.Then,calculations of the astrophysical S(E)function are performed using the experimental integral cross-section data and compared with historical results.The results of this experiment further enrich the experimental data on D-D fusion reaction cross-sections,providing stronger data support for accurate calculation of the reaction rates in the standard Big Bang nucleosynthesis model and for the evaluation of fusion nuclear parameter data.The datasets presented in this paper,including a brief introduction to the experimental setup,the differential cross-section data,and the integral cross-section data,are openly available at https://www.doi.org/10.57760/sciencedb.j00213.00243.关键词
聚变反应/截面/勒让德多项式/核合成Key words
fusion reaction/cross-section/Legendre polynomial/nucleosynthesis引用本文复制引用
孙君杰,朱通华,娄本超,郑普,肖军,杨杰成,牟云峰,邓春凤,韩子杰,鹿心鑫,蒋励..70-250 keV能区D-D聚变反应截面的实验测量[J].物理学报,2026,75(9):83-92,10.基金项目
中子科学与技术全国重点实验室(批准号:NST20250303)资助的课题. Project supported by the National Key Laboratory of Neutron Science(Grant No.NST20250303). （批准号:NST20250303）
