论文标题
（alpha，n）反应中的中子产生
Neutron production in (alpha, n) reactions
论文作者
论文摘要
中子可以在寻找稀有过程的地下实验中诱导背景事件。 MEV范围内的中子是通过自发裂变和（alpha，n）反应和宇宙射线在放射性衰减中产生的。放射性的中子通量在较大的深度（> 1 kmw。e。）中占主导地位。许多计算机代码可用于计算（alpha，n）反应，激发功能和中子产量的横截面。我们已经使用Empire2.19/3.2.3和Talys1.9来计算中子产量的横截面和分支比，以过渡到地面和激发态，并修改了Sources4a，以评估与高敏感性地下实验相关的不同材料中的中子产量和光谱。我们在这里报告了不同模型和代码与实验数据的比较，以估算这些计算的准确性。
Neutrons can induce background events in underground experiments looking for rare processes. Neutrons in a MeV range are produced in radioactive decays via spontaneous fission and (alpha, n) reactions, and by cosmic rays. Neutron fluxes from radioactivity dominate at large depths (>1 km w. e.). A number of computer codes are available to calculate cross-sections of (alpha, n) reactions, excitation functions and neutron yields. We have used EMPIRE2.19/3.2.3 and TALYS1.9 to calculate neutron production cross-sections and branching ratios for transitions to the ground and excited states, and modified SOURCES4A to evaluate neutron yields and spectra in different materials relevant to high-sensitivity underground experiments. We report here a comparison of different models and codes with experimental data, to estimate the accuracy of these calculations.
