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Abstract
The intensity of X-rays from PIXE (particle induced X-ray emission) analysis of particulate matter may be reduced relative to that expected from thin samples because of two effects: reduced X-ray cross sections due to proton energy loss, and X-ray attenuation. An equation has been derived for the correction of reduced X-ray intensities emitted from spherical particles. An arbitrary but homogeneous particle composition is assumed. A single particle size or a particle size distribution may be selected. The angle of X-ray detection relative to the incident beam may also be selected. Calculations for X-ray emission lines from sodium to tin have been made for several particle compositions, several radius values and a particle size distribution. It was surprising to find that attenuation corrections were independent of detection angle for all emission lines and particle sizes studied.
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