title: Monte Carlo simulation by GEANT 4 and GESPECOR of in situ gamma-ray spectrometry measurements.
abstract: The application of GEANT 4 and GESPECOR Monte Carlo simulation codes for efficiency calibration of in situ gamma-ray spectrometry was studied. The long computing time required by GEANT 4 prevents its use in routine simulations. Due to the application of variance reduction techniques, GESPECOR is much faster. In this code specific procedures for incorporating the depth profile of the activity were implemented. In addition procedures for evaluating the effect of non-homogeneity of the source were developed. The code was validated by comparison with test simulations carried out with GEANT 4 and by comparison with published results.
authors.affiliation: Physics Department, University of Bucharest, P.O. Box MG-11, 077125 Magurele, Romania.
authors.forename: Alecsandru
authors.initials: A
authors.lastname: Chirosca
authors.forename: Rares
authors.initials: R
authors.lastname: Suvaila
authors.forename: Octavian
authors.initials: O
authors.lastname: Sima
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D015233:Models, Statistical; D009010:Monte Carlo Method; D011829:Radiation Dosage; D012542:Scattering, Radiation; D012984:Software; D013051:Spectrometry, Gamma / Q000379:methods*
keywords: Activity distribution; Efficiency calibration; In situ gamma-ray spectrometry; Monte Carlo simulation