Accession Number : AD0706693

Title :   TIME-DEPENDENT NEUTRON AND SECONDARY GAMMA-RAY TRANSPORT IN INFINITE AIR AND IN AIR OVER GROUND,

Corporate Author : OAK RIDGE NATIONAL LAB TENN

Personal Author(s) : Straker,E. A.

Report Date : 07 MAY 1970

Pagination or Media Count : 43

Abstract : The general description of the radiation field was determined for several neutron source energies in infinite air and in an air-over-ground geometry for source heights of 50 and 1125 feet. The effect on dose of source height and detector height and the effect of the ground on energy, angular, and time dependence is discussed for both fission and 12.2- to 15-MeV neutron sources. The satisfactory agreement of calculations with experimental results from operations BREN and HENRE and the agreement between Monte Carlo and discrete ordinates results lend confidence to the cross sections used and the computational techniques. (Author)

Descriptors :   (*NUCLEAR EXPLOSIONS, AIRBURST), (*NEUTRON TRANSPORT THEORY, AIR), SHIELDING, FISSION NEUTRONS, GAMMA RAYS, FAST NEUTRONS, DOSE RATE, NUMERICAL ANALYSIS

Subject Categories : Radioactiv, Radioactive Wastes & Fission Prod
      Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE