Accession Number:

AD0743180

Title:

Models of Radiation Transport in Air - the ATR Code

Descriptive Note:

Final rept. 1 Apr 1970-15 Nov 1971

Corporate Author:

SCIENCE APPLICATIONS INC LA JOLLA CA

Report Date:

1971-11-01

Pagination or Media Count:

124.0

Abstract:

The report describes the work to date on development of the ATR computer code - a user-oriented code for calculating quickly and simply radiation environment problems at all altitudes in the atmosphere. The ATR code is based on parametric models of a comprehensive data base of air base transport results which was generated using rigorous transport techniques for infinite homogeneous air. The effects of an air-ground of an air-ground interface and non-uniform air density are treated as perturbation corrections on homogeneous- air results. The data base has been generated for neutrons, secondary gamma- rays, high-energy photons and low energy photons as a function of space, energy and angle out to range of 550 gmcm squared of air. Parametric models have been developed for all of this data base except photon angular distribution and a version of ATR has been completed for neutron and secondary gamma-ray transport.

Subject Categories:

  • Radiobiology
  • Computer Programming and Software
  • Radioactivity, Radioactive Wastes and Fission Products

Distribution Statement:

APPROVED FOR PUBLIC RELEASE