1. NAME AND TITLE OF DATA LIBRARY

HPICO: Evaluated Photon Interaction Library in OGRE BCD Format.

2. NAME AND TITLE OF DATA RETRIEVAL PROGRAMS

MASTAPE: Photon Interaction Cross Section Library and Data Handling Code.

PRINT-SIG: An OGRE Routine to Print Gamma-Ray Total Cross Sections and Energy Deposition Coefficients.

3. CONTRIBUTOR

Oak Ridge National Laboratory, Oak Ridge, Tennessee.

4. HISTORICAL BACKGROUND AND INFORMATION

The original OGRE (No. 1) compiled in 1962 was a combination of data from Grodstein ["X-Ray Attenuation Coefficients from 10 keV to 100 MeV," NBS Circular 583 (1957)] and from Storm and Israel [Gamma-Ray Absorption Coefficients for Elements 1 through 100 Derived from the Theoretical Values of the National Bureau of Standards, LA-2237 (1958)]. When the data of McMaster et al. and Plechaty and Terrall became available, the OGRE library was updated by adopting their photoelectric and pair production cross sections. Library No. 3 was established July 1969.

5. APPLICATION OF THE DATA

The photoelectric and pair-production cross sections provided are normally combined with Compton cross sections in transport codes such as OGRE to provide the data needed for transport calculations.

6. SOURCE AND SCOPE OF DATA

The photoelectric and pair-production data available as part of DLC-7/HPICE are reformatted to produce DLC-4/HPICO. (It is anticipated that the OGRE format and DLC-4/HPICO will eventually be abandoned and data will be made available only in ENDF/B format. In the meantime, DLC-4/HPICO provides a convenient link between new evaluations and OGRE.) Each energy point has a value for both cross sections. When necessary, values are obtained by interpolation. The basic data are from a Lawrence Radiation Laboratory, Livermore, California, evaluation.

The data are given for energies 1 keV to 100 MeV and for elements Z = 1-83, 86, 90, 92, and 94. The tables are identified by atomic number (Z).

The number of atoms per gram are given with each element which permits composition data to be given in OGRE input in terms of partial densities.

7. DISCUSSION OF THE DATA RETRIEVAL PROGRAMS

The MASTAPE program reads the DLC-4/HPICO BCD photon photoelectric and pair-production data and produces a binary master tape organized by element for the OGRE transport code system. Edit and revision capabilities are available.

THE PRINT-SIG code contains the basic OGRE cross-section routines which produce macroscopic cross-section tables and provide look-up capability. The code is designed to print tables of total and energy-deposition coefficients for any media defined by input.

8. DATA FORMAT AND COMPUTER

EBCDIC card images; IBM 360/370.

9. TYPICAL RUNNING TIME

MASTAPE: To compile, produce a binary tape, and edit the entire library requires less than seconds on the IBM 360/91 computer.

PRINT-SIG: To compile and print tables for H and H2O requires less than 5 seconds on the IBM 360/91 computer.

10. REFERENCES

a. Included in the documentation:

D. K. Trubey and H. E. Francis, "OGRE MASTAPE - Photon Interaction Cross Section Library and Data Handling Code," ORNL-TM-3046 (July 1969).

D. K. Trubey, "PRINT-SIG, An OGRE Routine to Print Gamma-Ray Total Cross Sections and Energy Deposition Coefficients," ORNL-TM-3046 (October 1968).

b. Background information:

S. K. Penny, D. K. Trubey, and M. B. Emmett, "OGRE, A Monte Carlo System for Gamma-Ray Transport Studies, Including an Example (OGRE-P1) for Transmission through Laminated Slabs," ORNL-3805 (1966). (This code is available from RSIC as CCC-46/OGRE.)

W. H. McMaster et al., "Compilation of X-Ray Cross Sections," UCRL-50174, Sec. II, Rev. 1 (May 1969).

E. F. Plechaty and J. R. Terrall, "Photon Cross Sections 1 keV to 100 MeV," UCRL-50400, Vol. VI (1968).

11. CONTENTS OF LIBRARY

Included are the referenced documents (10.a) and one tape cartridge in tar format which contains the library, retrieval programs, and sample problem input written in EBCDIC card images, plus output from the sample problem.

12. DATE OF ABSTRACT

November 1973; updated May 1984.