RESUMO
In an intercomparison exercise, the Monte Carlo codes most commonly used in gamma-ray spectrometry today were compared with each other in order to gauge the differences between them in terms of typical applications. No reference was made to experimental data; instead, the aim was to confront the codes with each other, as they were applied to the calculation of full-energy-peak and total efficiencies. Surprising differences between the results of different codes were revealed.
RESUMO
Within the proficiency test programme for the radionuclide laboratories supporting the verification of the Comprehensive Nuclear-Test-Ban Treaty, a simulated gamma spectrum with the characteristics of an atmospheric nuclear test was used as reference material. The spectrum was produced by the MCNP-based Virtual Gamma Spectroscopy Laboratory (VGSL), using analysis results of a historical measurement of nuclear weapons debris as input. The method was found suitable for a proficiency test assessing laboratories' gamma spectroscopic analysis.
