Radiation analysis method, radiation analysis device, and radiation detector

Abstract

This invention enables highly accurate sample analysis by analyzing energy spectra obtained using a radiation detector, even under a high dose-rate environment. In a radiation analysis method disclosed here, first, a spectrum of a sample (measured spectrum) is measured by a radiation detector (sample measurement step: S). The measured spectrum is obtained for each of different setting conditions, where a plurality of scintillators having different sizes and a plurality of shields having different thicknesses are used, respectively. Next, similar measurement is performed on a reference source (reference source measurement step: S). Next, from reference spectra thus obtained in S, a background nuclide-originating component, which is a component originating from a background nuclide (Cs) included in the measured spectra, is estimated (background nuclide-originating component estimation step: S). Next, a corrected spectrum is calculated as the difference between the measured spectrum and the background nuclide-originating component (corrected spectrum calculation step: S).