Speaker: Stepan Mashnik (X-5)

CEM2k and LAQGSM as Event Generators for LAHET, MARS, MCNPX, and Other Transport Codes

The improved Cascade-Exciton Model of nuclear reactions code CEM2k and the Los Alamos version of the Quark-Gluon String Model code LAQGSM have been recently developed at LANL to simulate nuclear reactions for a number of applications, including the Prad, RIA, and AAA Projects. To describe fission and light-fragment (heavier than 4He) production, both CEM2k and LAQGSM codes have been merged with the Generalized Evaporation Model code of Furihata (GEM2). We have tested and benchmarked the CEM2k and LAQGSM codes against a large variety of experimental data and have compared their results with predictions by other currently available models and codes. Our benchmarks show that the CEM2k and LAQGSM codes have predictive powers no worse than other currently used codes and describe many reactions better than other codes; therefore both our codes can be used as reliable event generators in LAHET, MCNPX, MARS, GEANT4, MCNP5, and other transport codes. The CEM2k code has been already incorporated into the transport codes MCNPX, MARS, and LAHET, and LAQGSM+GEM2, into MARS and LAHET. We plan to make available our CEM2k+GEM2 code via the RSICC code distribution center at Oak Ridge and to incorporate CEM2k+GEM2 and LAQGSM+GEM2 into the GEANT4 and MCNPX transport codes in the near future. Here, we present for users a brief description of our codes including our last improvements and developments and show illustrative results obtained with CEM2k+GEM2 and LAQGSM+GEM2 for several p+A and A+A spallation, fission, and fragmentation reactions compared with predictions by other models. Further necessary work is outlined.