1. NAME AND TITLE OF DATA LIBRARY

LAHIMACK: A Multigroup Library of Neutron and Gamma Cross Sections and Response Functions in the Energy Range up to 800 MeV

2. NAME AND TITLE OF DATA RETRIEVAL PROGRAM

COPYBL: A Program to Convert the EBCDIC Data to the ANISN Binary Format

3. CONTRIBUTOR

Institute of Nuclear Physics, Krakow, Poland

4. HISTORICAL BACKGROUND AND INFORMATION

The original LAHI library is a combination of the Oak Ridge National Laboratory library DLC-87/HILO and the Los Alamos National Laboratory high energy neutron multigroup library which was further developed at the Institute of Reactor Development, KFA Jülich GmbH, West Germany, within the Spallation Neutron Source Project. The LAHIMACK version of this library contains, additionally, the multigroup response functions/reaction cross sections, secondary particle production, kerma factors, etc., obtained from the HETC high energy transport code (thin target option) and from the PSR-132/MACK-IV code from ENDF/B-IV. The discussion of the response function data included in the LAHIMACK library can be found in reference 6.

5. APPLICATION OF THE DATA

The energy range of the library, from thermal to 800 MeV is relevant to the solution of shielding, nuclear heating, and other radiation protection problems connected with the accelerator neutron sources e.g. spallation target. The data contains 10 elements of shielding and biological importance. They can be easily implemented to the neutron transport codes like ANISN and DOT by using the activity option.

6. SOURCE AND SCOPE OF DATA

The LANL transport cross sections have been used for 9 neutron energy groups from 800 to 50 MeV and for 21 gamma groups between 14 and 0,01 MeV. The response functions above 20 MeV are obtained from HETC and below 20 MeV are collapsed from DLC-60/MACKLIB-IV. Cross sections with P3 Legendre expansion and response functions are provided for H-1, C, O, Al, Si, Fe, and Pb. Cross sections only are given for W and response functions only for N and Ca.

7. DISCUSSION OF THE DATA RETRIEVAL PROGRAM

Not applicable

8. DATA FORMAT AND COMPUTER

IBM 360/370.

9. TYPICAL RUNNING TIME

Not applicable.

10. REFERENCES

a. Included in documentation:

Informal notes (April 1987).

H. Schaal, "Combination of High Energy Libraries LASL and HILO as LAHI Library for Deep Penetration Calculations," SNQ 3J./BH 120783, KFA Jülich, (1983).

J.M. Zazula, P. Cloth, D. Filges, G. Sterzenbach, Nuclear Instruments and Methods in Physics Research, B16, 506 (1986).

T.W. Armstrong, P. Cloth, D. Filges, and H. Schaal, "Calculational Methods and High Energy Cross Sections for Spallation Source Shielding," Proceedings ICANS VIII, Chalk River,Canada (Sept 1983).

b. Background information:

R.G. Alsmiller, Jr. and J. Barish, "Neutron-Photon Multigroup Cross Sections for Neutron Energies below 400 Mev," ORNL/TM-7818, Oak Ridge National Laboratory (1981).

W.B. Wilson, "Nuclear Data Development and Shield Design for Neutrons below 60 Mev," La-7159, Los Alamos National Laboratory (1978).

P. Cloth, D. Filges, G. Sterzebbach, T. W. Armstrong, B. L. Colborn, "The KFA-Version of the High Energy Transport Code HETC and the Generalized Evaluation Code SIMPEL," Jul-Spez -196 (March 1983).

M.A. Abdou, Y. Gohar, R.Q. Wright, "MACK-IV, A New Version of MACK - A Program to Calculate Nuclear Response Functions from Data in ENDF/B Format," ORNL/TM-3994, Oak Ridge National Laboratory (1973).

R.G. Fluharty, et al, "Transport of Neutrons Induced by 800 MeV Protons," LA-UR-73-200, Los Alamos Scientific Laboratory (1973).

11. CONTENTS OF LIBRARY

Included are the referenced documents and one (1.2MB) DOS diskette which contains the library and the simple retrieval program.

12. DATE OF ABSTRACT

June 1987