A preliminary intercomparison of gamma-ray spectroscopy on building materials

A preliminary intercomparison on gamma-ray spectrometry determination of natural radionuclides in building materials was carried out in 1999-2002. Samples measured were fly ash, sand and tuff. Laboratories used different experimental equipment and procedures. Corrections for blank, spectral interference, self-absorption and coincidence summing effects were applied in most cases. The agreement between results was within 15-20%, most often within the reported uncertainties. Several general conclusions can be drawn regarding procedures correctness, uncertainty budget, secular equilibrium condition, and radionuclide representativeness in each natural series. Further studies are needed to draw more specific conclusions. (C) 2004 Elsevier Ltd. All rights reserved

An Intercomparison of Monte Carlo Codes Used in Gamma-Ray Spectrometry

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.JRC.D.4-Isotope measurement

Intercomparison of methods for coincidence summing corrections in gamma-ray spectrometry – part II (volume sources)

The second part of an intercomparison of the coincidence summing correction methods is presented. This exercise concerned three volume sources, filled with liquid solution. The same experimental spectra, decay scheme and photon emission intensities were used by all the participants. The results were expressed as coincidence summing correction factors for several energies of 152Eu and 134Cs, and different source-to-detector distances. They are presented and discussed.JRC.D.4-Nuclear physic

Determination of the probability for locating peaks by computerised peak location methods in gamma-ray spectra as a function of the relative peak area uncertainty

22nd International Confeence on Radionuclide Metrology and its Applications; Salamanca, 2019