Abstract
The radial distribution of xenon in irradiated (U,Pu)N and (U,Pu)C nuclear fuels has been determined. When xenon is contained in bubbles larger than 20 AA in diameter the emitted X-ray intensity is deficient and the magnitude of the deficit increases with bubble size. The subsequent errors in the measured gas concentrations are corrected using a computer programme that calculates the integral X-ray intensity for any given configuration of the gas bubbles within the volume of X-ray excitation. The correction model, which takes into account the probability of electron-gas bubble interaction, the depth distribution of X-ray production, and X-ray absorption, is valid for any randomly dispersed second phase with dimensions smaller than the volume of X-ray excitation.
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