A FAST ALGORITHM FOR THE CALCULATION OF NEUTRON SELF-SHIELDING FACTORS
Institute of Nuclear Sciences and Engineering
2685 Sacavém, Portugal
Thermal neutron self-shielding factors are calculated for different materials used in reactor dosimetry. The effect of multiple scattering inside the probe is taken into account within a new theoretical formalism recently proposed with application to foils. Here, the method is extended to probes of cylindrical geometry. A fast algorithm is developed for the calculation of the self-shielding based on an approximation equivalent to nearly six collisions inside the probe, which gives quite satisfactory results in the thermal region.
KEYWORDS: self-shielding, scattering, thermal neutrons, wires, foils