Maurer Richard H, Kinnison James D, Roth David R
The Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723, USA.
Radiat Prot Dosimetry. 2005;116(1-4 Pt 2):125-30. doi: 10.1093/rpd/nci157.
We report on detailed energy spectra of neutron production > 14 MeV from collisions of 200-500 MeV protons with combinations of aluminium, graphite and polyethylene. Comparisons of normalised neutron spectra are made with respect to incident proton energy, angle of neutron production and material. In general, carbon (graphite) or polyethylene (by itself or in combination with aluminium) reduce secondary neutron production > 14 MeV relative to the production from interactions in aluminium.
我们报告了200 - 500兆电子伏特质子与铝、石墨和聚乙烯组合碰撞产生能量大于14兆电子伏特的中子的详细能谱。针对入射质子能量、中子产生角度和材料对归一化中子能谱进行了比较。一般来说,相对于铝中相互作用产生的中子,碳(石墨)或聚乙烯(单独或与铝组合)会减少能量大于14兆电子伏特的次级中子产生。