Accession Number : AD0622301

Title :   A DESCRIPTION OF AN IBM-7090 MONTE CARLO PROGRAM (UNC-90-6) FOR THE SOLUTION OF THE TIME DEPENDENT NEUTRON TRANSPORT PROBLEM IN AN ATMOSPHERE WITH DENSITY DEPENDENT ON HEIGHT,

Corporate Author : UNITED NUCLEAR CORP WHITE PLAINS N Y DEVELOPMENT DIV

Personal Author(s) : Marotta,C. ; Guber,W.

Report Date : 15 APR 1962

Pagination or Media Count : 55

Abstract : This report describes an IBM-7090 Monte Carlo program for the transport of neutrons from a point monoenergetic source in an atmosphere with density dependent on height, extending up to 700 kilometers above ground zero. The earth is treated as an absorbing surface. The neutron flux is calculated at specified detector regions as a function of time and energy. A simple but effective importance sampling technique is incorporated in the program to improve statistics at detectors many mean free paths from the source. A Final Edit Program is described in this report which can be used to superpose, with specified weighting, the results of various monoenergetic sources. (Author)

Descriptors :   (*NEUTRON TRANSPORT THEORY, COMPUTER PROGRAMMING), (*NEUTRONS, ATMOSPHERES), NEUTRON FLUX, NEUTRON DETECTORS, MONTE CARLO METHOD, SAMPLING, TIME, ENERGY

Distribution Statement : APPROVED FOR PUBLIC RELEASE