Title :
Efficiency of a Bismuth-Germanate Scintillator: Comparison of Monte Carlo Calculations with Measurements
Author :
Hsu, H.H. ; Dowdy, E.J. ; Estes, G.P. ; Lucas, M.C. ; Mack, J.M. ; Moss, C.E. ; Hamm, M.E.
Author_Institution :
Los Alamos National Laboratory Los Alamos, New Mexico 87545
Abstract :
Monte Carlo calculations of a bismuth-germanate scintillator´s efficiency agree closely with experimental measurements. For this comparison, we studied the absolute gamma-ray photopeak efficiency of a scintillator (7.62 cm long by 7.62 cm in diameter) at several gamma-ray energies from 166 to 2615 keV at distances from 30.5 to 152.4 cm. Computer calculations were done in a three-dimensional cylindrical geometry with the Monte Carlo coupled photon-electron code CYLTRAN. For the experiment we measured 11 sources with simple spectra and precisely known strengths. The average deviation between the calculations and the measurements is 3%. Our calculated results also closely agree with recently published calculated results.
Keywords :
Bismuth; Computational geometry; Detectors; Electrons; Laboratories; Monte Carlo methods; Neutrons; Optical computing; Pulse measurements; Spectroscopy;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.1984.4333284
