A MONTE CARLO SIMULATION OF ELECTRON-PHOTON CASCADES INCLUDING PHOTONUCLEAR PROCESSES
Century Research Center Corporation
3-6-2 Nihonbashi-Honcho, Chuo-ku, Tokyo 103, Japan
A Monte Carlo simulation code - SANDYL - for electron-photon cascades is extended to include photonuclear processes. For this purpose, we introduce a variance reduction technique for the photonuclear processes. Neutron yields and energy-spectra of emitted neutrons from Pb and U targets bombarded by electrons (16 - 45 MeV) are analyzed by the extended version of SANDYL and the use of the evaporation model. The results agree with the experimental data except the energy-spectrum in the case of the Pb target. The possible further investigation is also discussed.
KEYWORDS: SANDYL, (γ,n) reaction, variance reduction technique, neutron yields and energy-spectra, evaporation model