Numerical modeling of the radiation field in a calibration facility using Monte Carlo techniques

Different ESG4 based Monte Carlo codes have been used to calculate the spatial distribution of some radiological quantities (air kerma and air absorbed dose) due to the presence of radiation sources in a specific workplace. Such distribution is of great interest in the case of the inhomogeneous fields produced by collimated beams and depends critically on the source distribution and its detailed geometry. From microdosimetric considerations, a new AUSGAB subroutine has been developed, permitting to obtain results which cannot be measured experimentally, such as the direct and scattered contributions to air kerma and air absorbed dose. (author)