Monte Carlo Particle Transport Methods: Neutron and Photon - gnssn

40 Monte Carlo Particle Transport Methods: Neutron and Photon Calculationsdetermination of the R 1distances, i.e., in the determination of the coordinates, where theparticle trajectories cross the boundaries separating the different homogeneous zones. Thisprocedure may be extremely complicated in complex geometries thus another technique 48is suggested instead of the "straightforward" method described above.The method is the following:(rO:1. Define a majorant cross-section: cr 0S 5 rj(r), for all r-s along the path;2. Select a distance R by Equation (3.2) and determine the tentative next collision siteK = r k_! + R