RSIC COMPUTER CODE PSR-053

1. NAME AND TITLE

CONFOLD: Least-Structure Unfolding Code System for Measured Neutron and Gamma-Ray Spectra.

2. CONTRIBUTOR

Los Alamos National Laboratory, Los Alamos, New Mexico.

3. CODING LANGUAGE AND COMPUTER

Fortran IV; CDC 6600 (A), IBM 360/370 (B).

4. NATURE OF PROBLEM SOLVED

CONFOLD solves integral equations of the first kind, subject to constraints on the structure of the solution.

5. METHOD OF SOLUTION

CONFOLD unfolds smooth, continuous spectra using a method called "least structure analysis."

6. RESTRICTIONS OR LIMITATIONS

It is necessary to use the correct uncertainties for the data and to use accurate response functions. Because no provision is made for including uncertainties in the response functions, it is important to determine how such uncertainties affect the unfolding and then to include them in the uncertainties assigned to the data.

7. TYPICAL RUNNING TIME

CONFOLD runs in a few seconds on the CDC 6600 computer.

8. COMPUTER HARDWARE REQUIREMENTS

CONFOLD is operable on the CDC 6600 computer. It requires about 13,000 words of storage for cases with 156 pulse-height channels and 21 response functions.

9. COMPUTER SOFTWARE REQUIREMENTS

A Fortran IV and Assembler language compiler is required.

10. REFERENCE

A. A. Robba and L. R. Veeser, "A Least-Structure Unfolding Code," LA-5088 (November 1972).

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 and output.

12. DATE OF ABSTRACT

January 1984.