Анализ спектрального распределения гамма-излучения полубесконечного источника с различными профилями заглубления радионуклида 137Cs

Abstract

Express-analysis of radioactive contamination in soil at large territories is performed with the use of gamma-spectrometry method above the soil surface. The relations between the registrated spectra and in-depth distribution parameters of source are of great importance in working out tire appropriate apparatus. In this paper the above relations have been investigated by Monte Carlo simulation method. Using apriory information about the technogenous contamination character and measured intensivity ratio of in-medium scattered radiation and the non-scattered one, it is possible to determine the profile of the radionuclide in-depth distribution. Usage of this information improves reliability of express-analysis of the gamma-radionuclide content in soil.