CEM03.01 and LAQGSM03.01 improvement for gas-production cross section calculations of the radiation protection and shielding division - 028

Reliable nuclear data on spectra and total hydrogen and helium (gas) production cross sections from various reactions are needed for fundamental studies and many applications. So, we need the gas-production cross sections by nucleons in accelerator-driven systems to evaluate the material damage; the kinetic energy released in matter (kerma) determined predominantly by hydrogen and helium production cross sections is of first importance for radiotherapy and radiation protection; such data are needed for astrophysics, etc. It is impossible to measure all needed data, therefore reliable models able to predict such data are required. All previous versions of the Cascade-Exciton Model (CEM) and of the Los Alamos Quark-Gluon String Model (LAQGSM) described gas-production cross sections only roughly and not well enough, just as many other similar models do. This is why we addressed recently this problem in the latest version of our codes CEM03.01 and LAQGSM03.01, improving significantly our description of both the spectra and total gas-production cross sections. A part of this work is presented here. (authors)