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XCOM Database

XCOM: Photon Cross Sections Database

NIST Standard Reference Database 8 (XGAM)

M.J. Berger,1 J.H. Hubbell,1 S.M. Seltzer,1 J. Chang,2 J.S. Coursey,2 R. Sukumar,2 and D.S. Zucker2

1National Institute of Standards and Technology, Physics Laboratory, Ionizing Radiation Division
2NIST, Physics Laboratory, Office of Electronic Commerce in Scientific and Engineering Data

© 1990, 1998 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. NIST reserves the right to charge for these data in the future.

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Abstract

A web database is provided which can be used to calculate photon cross sections for scattering, photoelectric absorption and pair production, as well as total attenuation coefficients, for any element, compound or mixture (Z less than equal 100), at energies from 1 keV to 100 GeV.

Contents

  1. Introduction
  2. Database for Elements
  3. Interpolation and Combination
  4. How to Run the XCOM Program
  5. References

This work was supported in part by the Department of Energy, Office of Health and Environmental Research, Washington, DC 20585; National Institute of Standards and Technology, Standard Reference Data Program, and by NIST's Systems Integration for Manufacturing Applications (SIMA) Program.


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Online: March 1998    Last Update: August 2005