A Monte Carlo based technique for analysing gamma-ray spectra

摘要

A technique based on a convolution algorithm and Monte Carlo simulation using the MCNP4C code (Briesmeister 2000 Los Alamos National Laboratory LA-13709-M) was developed and is proposed for analysing gamma-ray spectra. It can be performed on condition that the detection of gamma-rays can be simulated with the MCNP code; in other words, that simulated spectra can be obtained for gamma-rays of interest. The technique was examined by testing it respectively on the deconvolution of gamma-ray spectra from a ~(60)Co source, an Am-Be neutron source, and from two pairs of standard sources: ~(137)Cs and ~(54)Mn, ~(60)Co and ~(22)Na. For all these sources, the shapes of simulated gamma-ray spectra obtained using the technique were compared to the shapes of measured spectra. The technique appears to be efficient and practical and is reported here as an alternative and supplemental tool for analysing gamma-ray spectra.