Abstract
To investigate the validity of the EGS4 code regarding photon transport in the keV region, we performed systematic comparisons of measurements and EGS4. The scattered-energy spectra of monochronized synchrotron-radiation photons toward 90° by samples (C, Cu, Pb) were measured using high-purity Ge detectors. The incident photons were in a linearly polarized beam of 20, 30 and 40 keV. EGS4 calculations were performed in default status and with improvements of low-energy photon transport (linearly polarized photon scattering, Doppler broadening, L-X and K-X). The measurement and calculations were compared in absolute values. Both the intensity and the shape of the peaks were compared. EGS4 calculations with improvements in low-energy photon transport agreed well with the measurements.
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