Spectrum Analysis of Gamma Rays Emitted from I-131 Using a Response Matrix for a 3”φ× 3” NaI(Tl) Scintillator

Abstract

A 22 × 22 response matrix for a 3”φ× 3” NaI(Tl) scintillation spectrometer was derived to unfold pulse height distributions of gamma rays emitted from I-131. The unfolded energy spectra yielded information concerning fluxes and dose rates due to primary and scattered components, respectively.