2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/197319The Moliere theory of multiple Coulomb scattering is modified to take into account difference between scattering off atomic nuclei and electron. A simple analytical expression for angular distribution of charged particles passing through a thick absorber is found. It does not assume any special form for a differential cross section and has wider range of applicability than a Gaussian approximation. A well-known method to simulate multiple Coulomb scattering is based on the different treatment of soft and hard collisions. An angular deflection in a large number of soft collisions is sampled using the proposed distribution function, a small number of hard collisions are simulated directly. A boundary between hard and soft collisions is defined providing a precise sampling of scattering angle (1% level) and small number of hard collisions. A corresponding simulation module takes into account projectile and nucleus charge distributions and exact kinematics of a projectile-electron interaction.5 pages, 4 figures. Presented paper at the 10th International Conference on Radiation Shielding, Funchal (Madeira), Portugal, May 9-14, 2004High Energy Physics - PhenomenologyHigh Energy Physics - ExperimentNuclear Experimenttext