SPALLATION EXPERIMENT ON THICK LEAD TARGET: ANALYSIS OF EXPERIMENTAL DATA WITH MONTE CARLO CODES

Monte Carlo codes MCNPX and FLUKA were used to analyze the experiment realized in the Laboratory of Nuclear Problems of the Joint Institute for Nuclear Research Dubna in December, 2003. A 660 MeV proton beam directed to a thick, lead target produced spallation neutrons, which were probed at dierent places around the target with small activation detectors. The codes were used to study the systematic uncertainties and to predict the experimental results. Several spallation models included in MCNPX and FLUKA were checked against each other and the experiment. Both codes described successfully most of the experimental results.