Proceedings of the Royal Society of London Series A Containing Papers of a Mathematical and Physical Character · 1934 · 43 citations · 0 references
Natural SciencesPhysicsNuclear PhysicsRadiation PhysicsRadiobiologyAbsorbed DoseRadiative ProcessesCompton ScatteringGamma Irradiation EffectsGamma-ray AbsorptionGamma-ray AttenuationHigh-energy Radiation ProcessesRadiation AbsorptionRadiation ScatteringSecondary Radiation Production
Abstract In a previous paper we gave an account of an investigation of the secondary radiation produced when different elements are irradiated with the high energy γ-rays of thorium C". The present paper describes an extension of this investigation. It will be reduced that confusion with the ordinary scattered radiation was almost entirely eliminated by examining the secondary radiation in a direction making a large angle with the primary beam, since under these conditions not only is the Compton radiation relatively very much weaker, but in addition it is comparatively soft and is easily absorbed in the radiator itself, or in a very small thickness of absorber, owing to the large increase in wave-length at this large angle of scattering.