GAMMA-RAY COLLIMATOR PENETRATION AND SCATTERING EFFECTS Document Details Document Type Technical Report Publication Date May 20, 1957 Accession Number AD0149995 Entities People R.l. Mather Organizations Naval Radiological Defense Laboratory Tags DTIC Thesaurus Topics Collimators Electromagnetic Radiation Electromagnetic Scattering Gamma Rays Ionizing Radiation Nuclear Radiation Optical Equipment Scattering Wave Phenomena