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Evaluation of a New Monte Carlo Code (PEP-C) for Predicting the Efficiency of a Small Bismuth Germanate Detector to Photons at Energies to 10 MeV

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2 Author(s)
J. C. Wilson ; Department of Chemical Engineering and Applied Chemistry and Centre for Nuclear Engineering University of Toronto, Toronto, Canada, M5S 1A4 ; J. S. Hewitt

Monte Carlo calculations of the efficiency of a small bismuth germanate detector are compared with experimental results. The calculations were made with a newly developed computer code PEP-C (for Photon-Electron-Positron transport in Cylindrical geometry) designed specifically for the computation of energy deposition spectra. Compared with existing transport codes, PEP-C incorporates several refinements in both the accuracy and efficiency of the particle tracking. Experimental data have been obtained for incident photons with energies in the range 0.059-8.062 MeV using calibrated radioactive sources, neutron activated sources and a radiative proton capture source. The calcllated data have a statistical uncertainty of no more than ±2%, and agree with the measurements within the experimental uncertainty which varies from ±2% at the low energies to ±8% at the highest energy.

Published in:

IEEE Transactions on Nuclear Science  (Volume:32 ,  Issue: 1 )