title: Simulation of radioactive decay in GEANT Monte Carlo codes: comparison between spectra and efficiencies computed with sch2for and G4RadioactiveDecay.
abstract: Two CERN Monte Carlo codes, i.e. GEANT3.21 and GEANT4, were compared. The specific routine (sch2for), implemented in GEANT3.21 to simulate a disintegration process, and the G4RadioactiveDecay class, provided by GEANT4, were used for the computation of the full-energy-peak and total efficiencies of several radionuclides. No reference to experimental data was involved. A level of agreement better than 1% for the total efficiency and a deviation lower than 3.5% for the full-energy-peak efficiencies were found.
authors.affiliation: ENEA Istituto Nazionale di Metrologia delle Radiazioni Ionizzanti (INMRI), Centro Ricerche Casaccia, Rome, Italy. marco.capogni@enea.it
authors.forename: M
authors.initials: M
authors.lastname: Capogni
authors.forename: S
authors.initials: S
authors.lastname: Lo Meo
authors.forename: A
authors.initials: A
authors.lastname: Fazio