RSIC COMPUTER CODE PSR-018

1. NAME AND TITLE

PLOTFB-I: ENDF/B Data Plotting Code.

2. CONTRIBUTORS

National Neutron Cross Section Center, Brookhaven National Laboratory, Upton, New York.

Oak Ridge National Laboratory, Oak Ridge, Tennessee.

3. CODING LANGUAGE AND COMPUTER

Fortran IV; IBM 360/75/91.

4. NATURE OF PROBLEM SOLVED

PLOTFB-I will produce CRT (cathode ray tube) plots of ENDF/B formatted data in either BCD or binary mode. In contrast to the parent code PLOTFB, PLOTFB-I will plot quantities more directly related to experimental results. The differential cross section is now plotted in ENDF/B files 4, 5, 14, and 15. The units are millibarns per steradian and millibarns per kilo-electron volt.

5. METHOD OF SOLUTION

ENDF/B data, which may be considered as ordered pairs of data points, is scaled and plotted on the CRT plotter. Plotting is performed at the ENDF file level (MAT, MF). Neutron cross section data (Files 3 - 5), photon production data (Files 12 - 15), and photon interaction data (File 23) are plotted on request. Selective plots within a file are not allowed.

The basic input is identical to that for PLOTFB. However, for users who wish to keep track of different versions of an evaluation (e.g., the DNA data library), then column 20 of the "blank card" following the request card is used to define a MOD number.

6. RESTRICTIONS OR LIMITATIONS

Since ENDF/B utility codes exist for the purpose of producing interpreted listings of the data files, no attempt was made to maintain the listing option available in PLOTFB. In addition, a restriction has been placed on File 4 (neutron angular distributions) plots. A File 3 request must precede the File 4 request.

7. TYPICAL RUNNING TIME

Typical running times are difficult to define. Obviously, the quantity of ENDF/B data to be plotted is directly proportional to the running time. Complete plots of most evaluations contained in the DNA data library require 4 minutes or less on the IBM 360/91. The exceptions are N-14 (DNA 4133) and Fe (DNA 4180).

8. COMPUTER HARDWARE REQUIREMENTS

PLOTFB-I is operable on the IBM 360/75/91 computers with a minimum of 340 K bytes of core storage. Auxiliary storage such as magnetic tape or disk devices must be available for logical units 2, 3, 4, and 20. CALCOMP subroutines are required.

9. COMPUTER SOFTWARE REQUIREMENTS

IBM OS 360 with the Fortran H (MVT version 20.1).

10. REFERENCES

H. C. Honeck, "Description of the ENDF/B Processing Codes and Retrieval Subroutines," BNL-13582 (ENDF-110) (Rev. September 1970).

J. E. White and R. Q. Wright, "Modification of PLOTFB for DNA Phase I Data Testing Program," Neutron Phys. Div. Ann. Progr. Rep., ORNL-4800 (May 31, 1972) p. 51.

11. CONTENTS OF CODE PACKAGE

Included are the referenced documents and one (1.2MB) DOS diskette which contains the source code and sample problem input and output.

12. DATE OF ABSTRACT

February 1973; updated November 1983, February 1985.

KEYWORD: PLOTTING