Radiation Transport in One-Dimensional Finite Systems—Part I: Development in the Anisotropic Source—Flux Iteration Technique

Gamma-ray exposure build-up factors of some brick materials in the state of Punjab

“…The build-up is defined as the ratio of the total value of a specified radiation quantity at any point to the contribution to that value from radiation reaching the point without having undergone a collision. Build-up factors have been computed by various codes such as PALLAS (Takeuchi and Tanaka, 1984), ADJMON-I (Simmons, 1973;Chilton et al, 1980), ASFIT (Gopinath and Samthanam, 1971) and EGS4 (Nelson et al, 1985). These codes use an accurate algorithm for the Klein-Nishina cross-section which eliminates other sources of error.…”

Investigations of multiple backscattering and albedos of 1.12MeV gamma photons in elements and alloys

“…Perkins [6,7] has developed Monte Carlo method to calculate the number and energy gamma-ray albedos for a material of Z eff = 13, corresponding to both concrete and aluminium. The total albedos and reflection build up factors have been calculated by different approaches by using invariant imbedding method [8], moment's method [9] and semi analytical method [10,11]. In order to gain useful information about these multiple backscattering processes, in the present experiments, the intensity distribution of multiply backscattered photons from targets of various atomic numbers and thicknesses is measured, thus providing the dependence of saturation thickness (depth) on atomic number of the target.…”

Progress and prospects of calculation methods for radiation shielding

“…The codes used were ADJMOM-I [77](moments method), PALLAS [78,79](discrete ordinate-integral transport), and ASFIT [80] (discrete ordinate-integral transport). The data selected for the standard are mostly from moment method calculations.…”