1. NAME AND TITLE OF DATA LIBRARY

KERMAL: Neutron and Gamma-Ray Kerma Factors Based on LLNL Nuclear Data Files.

2. NAME AND TITLE OF DATA RETRIEVAL PROGRAMS

KERMAL: Retrieves Neutron Kerma Factors.

3. CONTRIBUTOR

Lawrence Livermore National Laboratory, Livermore, California.

4. HISTORICAL BACKGROUND AND INFORMATION

KENDL, the neutron kerma factors are calculated from the LLNL Evaluated Nuclear Data Library (ENDL) data file (dated December 28, 1985). The results are for the 175 neutron energy groups used by the TART Monte Carlo neutron transport code for isotopes and elemental mixtures. The gamma-ray kerma factors are based on the LLNL Evaluated Gamma-Ray Data Library (EGDL).

5. APPLICATION OF THE DATA

Kerma factors are used extensively in biomedical applications. Specifically, neutron kerma factors are used in determining heating in materials of interest from neutron-induced reactions in fission or fusion power applications.

6. SOURCE AND SCOPE OF DATA

In KENDL the neutron kerma factors are tabulated for 15 composite materials and for the isotopes or elements in the LLNL ENDL file from Z=1 to Z=29. The incident neutron energies range from 1.882x10-5 to 20 MeV for the composite materials and from 1.307x10-9 to 20 MeV for the isotopes and elements. In KEGDL the gamma-ray kerma factors from the LLNL EGDL file are tabulated for the elements from Z=1 to Z=30 and for 15 composite materials. The kerma factors are presented for 191 energy groups over the incident photon energy range from 100 eV to 100 MeV.

7. DISCUSSION OF THE DATA RETRIEVAL PROGRAMS

The sample program produces kerma factors for each requested material for 175 energy groups from the KENDL file.

8. DATA FORMAT AND COMPUTER

Card images; IBM.

9. TYPICAL RUNNING TIME

The sample problem took less than a second of CPU time on the IBM 3033 under the MVS operating system.

10. REFERENCES

R. J. Howerton, Calculated Neutron KERMA Factors Based on the LLNL ENDL Data File, UCRL-50400, Vol. 27 (January 1986).

R. J. Howerton, Calculated Photon KERMA Factors Based on the LLNL EGDL Data File, UCRL-50400, Vol. 29 (October 1986).

11. CONTENTS OF LIBRARY

Included are the referenced documents and one DS/HD 3.5" (1.2 MB) in DOS format diskette which includes the data files, retrieval program, sample input and output.

12. DATE OF ABSTRACT

July 1991.