1. NAME AND TITLE OF DATA LIBRARY

I-R-MAN: Photon Interaction Data on ICRP Reference Man.

2. NAME AND TITLE OF DATA RETRIEVAL PROGRAMS

No retrieval program is in the package.

3. CONTRIBUTOR

Radiation Physics and Medicine Departments, St. Bartholomew's Hospital, London, England, United Kingdom.

4. HISTORICAL BACKGROUND AND INFORMATION

The large amount of data available on the physical characteristics of "Reference Man" are derived from many different sources and contains some anomalies. Important elements are missing from some of the systems resulting in mass deficiencies. An analysis of the data has indicated that 12 systems had errors in mass above 20% and have to be rejected in any computation of interaction data. The remaining 69 organs and tissues had mass errors below 5%, with 41 systems within the range 0 - 2% and 27 within the range 0 - 1%.

5. APPLICATION OF THE DATA

Partial mass attenuation and energy absorption coefficients, at 33 energy points from 10 keV - 100 MeV, have been calculated for the 69 accepted ICRP tissues. For each element the data included all of the relevant partial effects for both attenuation and absorption interactions.

6. SOURCE AND SCOPE OF DATA

Thirty-three photon energies in MeV were analyzed. Partial mass attenuation and energy absorption coefficients at each of these energies were calculated by the conventional "Mixture Rule," summing the contributions of each element present according to its fractional weight in the tissue.

7. DISCUSSION OF THE DATA RETRIEVAL PROGRAM

Not applicable.

8. DATA FORMAT AND COMPUTER

BCD card images; CDC 6600.

9. TYPICAL RUNNING TIME

Not applicable.

10. REFERENCES

D. R. White, D. Ingram, M. C. Fitzgerald, "A Tabulation of Mass Attenuation and Energy Absorption Coefficients for 69 ICRP Reference Man Organs and Tissues" (October 1977).

D. R. White and M. Fitzgerald, "A Tabulation of the 4th Order Polynomial Coefficients Calculated to Fit the Photon Interaction Data of 69 ICRP Reference Man Tissues," Reprint from Health Physics 33, 628-633 (1977).

D. R. White and M. Fitzgerald, "Calculated Attenuation and Energy Absorption Coefficients for ICRP Reference Man (1975) Organs and Tissues," Reprint from Health Physics 33, 73-81 (July 1977).

"General Purposes for the Reference Man," excerpt from International Commission on Radiological Protection (ICRP) Publication 23 (1975).

Ellery Storm and Harvey I. Israel, "Photon Cross Sections from 1 keV to 100 MeV for Elements Z = 1 to Z = 100," Reprint from Nuclear Data Tables A7, 565-681 (1970).

11. CONTENTS OF LIBRARY

Included are the referenced documents and one (1.2MB) DOS diskette which contains the ICRP tissue and organ data.

12. DATE OF ABSTRACT

December 1984.