1. NAME AND TITLE
SOSUM: Multigroup Beta and Gamma-Ray Energy Sources from Activities.
Atomics International, Canoga Park, California.
3. CODING LANGUAGE AND COMPUTER
FORTRAN IV; IBM 360/75.
4. NATURE OF PROBLEM SOLVED
Beta and Gamma-Ray Source Strengths, in a multigroup energy structure, are computed from
isotope radioactivity levels given in terms of disintegration rates.
5. METHOD OF SOLUTION
Data on the individual photon per disintegration for 181 isotopes are contained in the original
library. By combining these data with activity data of a fission product inventory code, the decay
energy per each of the specified energy groups is determined. The beta-ray energy is generally
placed in one group on the basis of the assumed average energy, which is a function of the
maximum energy and atomic number.
6. RESTRICTIONS OR LIMITATIONS
7. TYPICAL RUNNING TIME
Estimated running time of the packaged sample problem on the IBM 360/75: 0.5 minutes.
8. COMPUTER HARDWARE REQUIREMENTS
The code was designed for the IBM 360/370 using standard I-O.
9. COMPUTER SOFTWARE REQUIREMENTS
The code is operable on the IBM 360/75 operating system using the OS/360 H compiler.
B. J. Dray, and R. J. Thomson, "SOSUM, A Program to Compute Multigroup Beta and
Gamma Energy Sources from Radioisotope Activities," AI-AEC-MEMO-12693 (June 1968).
11. CONTENTS OF CODE PACKAGE
Included are the referenced document and one (1.2MB) DOS diskette which contains the source
code, library data, and input and output for a sample problem.
12. DATE OF ABSTRACT
May 1969; updated July 1981.
KEYWORDS: ACTIVATION; GAMMA-RAY; BETA-RAY; SOURCE STRENGTH; ISOTOPE INVENTORY