1. NAME AND TITLE
ELGATL: Calculation of Energy Spectra from Coupled Electron-Photon Slowing Down.
U.S. Department of Energy Environmental Measurements Laboratory, New York, New York.
3. CODING LANGUAGE AND COMPUTER
FORTRAN IV; CDC-6600.
4. NATURE OF PROBLEM SOLVED
ELGATL calculates electron and photon track lengths in uniform homogeneous media
accounting for all major physical particle interactions. It was designed for problems where only
energy spectra and not position and direction of particles are required or where source is uniformly
5. METHOD OF SOLUTION
ELGATL incorporates the direct numerical integration of coupled electron-photon track length
equations using iterative techniques.
6. RESTRICTIONS OR LIMITATIONS
ELGATL is valid for energies ranging from 10 keV to over 10 GeV.
7. TYPICAL RUNNING TIME
Typical running time is approximately 10 minutes on the CDC-6600 for 500 energy groups, but
it is highly dependent upon the number of groups due to the iterative numerical technique.
8. COMPUTER HARDWARE REQUIREMENTS
A CDC-6600 computer is required.
9. COMPUTER SOFTWARE REQUIREMENTS
A FORTRAN IV compiler is required.
H. L. Beck, "Energy Spectra from Coupled Electron-Photon Slowing Down," HASL-309
11. CONTENTS OF CODE PACKAGE
Included are the referenced document and one (1.2MB) DOS diskette which contains the source
code and sample problem input.
12. DATE OF ABSTRACT
KEYWORDS: COUPLED; ELECTRON; GAMMA-RAY; INFINITE MEDIUM; NUMERICAL INTEGRATION