Radiation Protection Dosimetry Advance Access originally published online on October 17, 2007
Radiation Protection Dosimetry 2008 128(1):83-89; doi:10.1093/rpd/ncm307
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Specific activity to H*(10) conversion coefficients for in situ gamma spectrometry
Institut de Radioprotection et de Sûreté Nucléaire, Laboratoire de Mesure de la Radioactivité de l'Environnement, Bât. 501, Bois de Rames, 91400 Orsay, France
* Corresponding author: mickael.lemercier{at}irsn.fr
Received February 3, 2006, amended March 22, 2007, accepted April 23, 2007
The typical situations found in in situ gamma spectrometry have been simulated by Monte Carlo techniques to obtain the energy spectra of the photon fluence rate existing at 1 m above ground. The main difficulty found with the model is its slow convergence. A method to speed up the calculation has been derived. The results of the model have been thoroughly tested against existing data. In a final stage, the specific activity to H*(10) conversion coefficients have been derived for the typical scenarios encountered in the in situ gamma spectrometry.