title: Polyethylene filtration of 30 and 40 MeV p-Be neutron beams.
mesh_terms: D001608:Beryllium; D005374:Filtration / Q000295:instrumentation; D009502:Neutrons; D010315:Particle Accelerators; D011095:Polyethylenes / Q000528:radiation effects; D013057:Spectrum Analysis
chemical_list: D011095:Polyethylenes; D001608:Beryllium