Accession Number:

AD0265596

Title:

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

Descriptive Note:

Corporate Author:

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON D C

Personal Author(s):

• FESSLER,THEODORE E.
• WOHL,MILLARD L.

Report Date:

1961-11-01

Pagination or Media Count:

1.0

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

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE