title: STEFFY-software to calculate nuclide-specific total counting efficiency in well-type γ-ray detectors.
abstract: A software package is presented to calculate the total counting efficiency for the decay of radionuclides in a well-type γ-ray detector. It is specifically applied to primary standardisation of activity by means of 4πγ-counting with a NaI(Tl) well-type scintillation detector. As an alternative to Monte Carlo simulations, the software combines good accuracy with superior speed and ease-of-use. It is also well suited to investigate uncertainties associated with the 4πγ-counting method for a variety of radionuclides and detector dimensions. In this paper, the underlying analytical models for the radioactive decay and subsequent counting efficiency of the emitted radiation in the detector are summarised.
authors.affiliation: European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Retieseweg 111, B-2440 Geel, Belgium. stefaan.pomme@ec.europa.eu
authors.forename: S
authors.initials: S
authors.lastname: Pommé
mesh_terms: D000465:Algorithms; D006207:Half-Life; D038622:Internationality; D011829:Radiation Dosage; D011868:Radioisotopes / Q000032:analysis* / Q000737:chemistry / Q000592:standards*; D011874:Radiometry / Q000295:instrumentation* / Q000592:standards*; D012015:Reference Standards; D012016:Reference Values; D012984:Software / Q000592:standards*; D013051:Spectrometry, Gamma / Q000295:instrumentation* / Q000592:standards*
chemical_list: D011868:Radioisotopes