Energy compensated solid state gamma dosimeter

Solid state semiconductor detectors using pulse mode detection are attractive candidates for real time dosimetry systems. Their high atomic number relative to that of tissue gives a nonlinear response as a function of the photon energy over the range from 30 keV to 10 MeV. An analytical model of a silicon PIN diode has been developed, including the photoelectric and Compton interactions as well as the ejection of the secondary electrons from the sensitive volume. The authors tested a nonlinear pulse height compensation algorithm using calibrated gamma and x-ray fluxes, and find that this approach improves the dose accuracy