Deterministic analytical method for the calibration of semiconductor detectors in gamma ray spectrometry

A simple to use computer program (called ATT3D) to calculate the detector efficiency for any type of geometry and material is described. The requested data are a point geometry efficiency and the description of the detector's and sample's geometries. This program, adapted for a 486 computer or for a workstation, can be used in different applications and especially in body burden assessments by the direct method (whole-body counting). The accuracy depends on the description of the geometry which can be adapted by changing the mesh size when high precision is requested. (Author)