NIST Physical Measurement Laboratory XCOM Photon Cross Sections Database

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The following compressed files contain the data files, FORTRAN-77 source code, and compiled executables (for Dos only).

These are not necessarily the same versions of XCOM as the one that is available on line. They are not as fully featured and are not updated as regularly.

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.

National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgement. However, NIST makes no guarantees, expressed or implied, about its quality, reliability, or any other characteristic, and shall not be liable for any damage that may result from errors or omissions in the Database. Moreover, NIST assumes no responsibility whatsoever for its use by other parties.

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