Accession Number : AD0265596

Title :   MONTE CARLO STUDIES OF GAMMA-RAY AND NEUTRON TRANSPORT IN INFINITE HOMOGENEOUS MEDIA

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON D C

Personal Author(s) : FESSLER,THEODORE E. ; WOHL,MILLARD L.

Report Date : NOV 1961

Pagination or Media Count : 1

Abstract : Two point-source, infinite-medium Monte Carlo codes were written for the IBM 704 computer. The codes simulate respectively gamma-ray and neutron transport from a monoenergetic source. A detailed description, including importance sampling methods, is given. Results showed good agreement with moments-method calculations for the same geometry. Calculations for 6-Mev gamma rays in tin provide data on the contribution of annihilation radiation to both the buildup factors and energy spectra. Calculations for 1-Mev gamma rays in water are also presented. The results of calculations for 6-Mev source neutrons in water show a peak in the energy spectrum which is found to be due to single scattering of source particles from oxygen. (Author)

Descriptors :   *GAMMA NEUTRON REACTIONS, *NUMERICAL METHODS AND PROCEDURES, *TRANSPORT PROPERTIES, CODING, ELASTIC SCATTERING, GAMMA RAYS, INTEGRALS, NEUTRON CROSS SECTIONS, NEUTRONS, POLYNOMIALS, PROBABILITY, REAL VARIABLES, SAMPLING, STATISTICAL FUNCTIONS

Distribution Statement : APPROVED FOR PUBLIC RELEASE