Models of Radiation Transport in Air - the ATR Code
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 gm/cm 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1971
- Accession Number
- AD0743180
Entities
People
- James A. Lonergan
- Louis Huszar Jr.
- Robert J. Harris Jr.