title: Heavy metal shielding for neutron sources.
mesh_terms: D002142:Californium; D007854:Lead; D008670:Metals; D009502:Neutrons; D011095:Polyethylenes; D011829:Radiation Dosage; D011835:Radiation Protection
chemical_list: D008670:Metals; D011095:Polyethylenes; D007854:Lead; D002142:Californium