Accession Number : AD0635303

Title :   MEASUREMENTS AND SINGLE-VELOCITY CALCULATIONS OF DIFFERENTIAL ANGULAR THERMAL-NEUTRON ALBEDOS FOR CONCRETE.

Corporate Author : OAK RIDGE NATIONAL LAB TENN

Personal Author(s) : Maerker, R. E. ; Muckenthaler,F. J.

Report Date : 05 APR 1966

Pagination or Media Count : 29

Abstract : Single-velocity Monte Carlo calculations and measurements were performed to determine the differential angular thermal-neutron albedos for a reinforced concrete from monodirectional beams of incident thermal neutrons. Preliminary calculations using a statistical estimation technique indicate up to 50 scatterings should be followed for each neutron in order to produce good estimates of the differential albedos, and up to 100 scatterings to produce good estimates of the capture gamma-ray differential dose albedos. Deviation between experiment and calculation can be reduced to an average of 5.1% for 72 points of comparison if an anisotropic scattering law for water deduced from earlier Argonne National Laboratory measurements is assumed. (Author)

Descriptors :   (*SHIELDING, CONCRETE), (*CONCRETE, *ALBEDO), (*THERMAL NEUTRONS, ALBEDO), NEUTRON BEAMS, NUCLEAR SCATTERING, NEUTRON CAPTURE GAMMA RAYS, MONTE CARLO METHOD

Subject Categories : Nuclear Radiation Shield, Protection & Safety

Distribution Statement : APPROVED FOR PUBLIC RELEASE