The asteroid impacts can be devastating for the life on the Earth. Thus, mitigation of this unwanted event is of crucial importance, and nuclear devices are state-of-the-art choice. The presented paper focuses on nuclear data validation of silicon and oxygen. Nuclear data validation is an essential task because nuclear data are the deciding factor for energy deposition profiles, which serve as input for subsequent hydrodynamic simulation, thus directly affecting the description of asteroid deflection. The silicon and oxygen in the form of silicate materials are abundant in asteroids. The set of neutron and gamma transport experiments using a primary neutron standard Cf neutron source was performed. The fast neutron spectrum in the energy range of 2–10 MeV was measured using a stilbene detector. The best agreement for fast neutron leakage spectra was reached using INDEN evaluation for Si and ENDF/B-VIII.0 O evaluation. Activation foils sensitive in different energy ranges were utilized. The results depend on the examined reaction and distance from the source. Finally, the prompt gamma rays from capture and inelastic scattering were measured by an HPGe detector. With the exception of Si(n,n′) 1779 keV peak, other prompt gamma production peaks show significant discrepancies. The calculations for comparisons of different transport libraries were performed using Monte Carlo MCNP6.2 code. The results show the necessity of further improvement of evaluations for oxygen and silicon.

中文翻译：

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用于小行星偏转目的的 SiO2 中子截面验证

小行星撞击对于地球上的生命来说可能是毁灭性的。因此，减轻这种不良事件至关重要，而核装置是最先进的选择。本文重点关注硅和氧的核数据验证。核数据验证是一项重要任务，因为核数据是能量沉积剖面的决定因素，能量沉积剖面是后续流体动力学模拟的输入，从而直接影响小行星偏转的描述。小行星中富含硅酸盐物质形式的硅和氧。使用初级中子标准 Cf 中子源进行了一组中子和伽马输运实验。使用二苯乙烯探测器测量 2-10 MeV 能量范围内的快中子谱。使用 INDEN 对 Si 的评估和 ENDF/B-VIII.0 O 的评估达到了快中子泄漏光谱的最佳一致性。使用了对不同能量范围敏感的激活箔。结果取决于检查的反应和距源的距离。最后，由 HPGe 探测器测量了捕获和非弹性散射产生的瞬发伽马射线。除 Si(n,n') 1779 keV 峰外，其他瞬发伽马产生峰显示出显着差异。使用蒙特卡罗MCNP6.2代码进行不同传输库比较的计算。结果表明有必要进一步改进对氧和硅的评估。