Abstract
A new analytical model was introduced for secondary gamma rays due to either (γ, γ) or (n, γ) reactions in a homogeneous, hydrogenous medium, where Compton scattering is the main effect of interaction with matter. For the case of a gamma point source, an expression for the secondary gamma flux distribution due to (γ, γ) reactions was obtained on the basis of the flux distribution in a reference medium. Expressions for the spatial moments and buildup factor were derived. A general form of the secondary gamma flux distribution due to (n, γ) reactions was obtained in terms of the gamma point source flux, and of the thermal neutron flux in reference media. Spatial moments of the (n, γ) secondary gamma flux distribution were calculated.
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