MCNP Photoatomic Data Libraries - MCLIB04

    Released: 2002-07-25

    MCPLIB04 was officially released in 2002. The cross section, form factor and fluorescence data are all derived from the ENDF/B-VI.8 data library that are derived from EPDL97. Cross section data are given for incident photon energies from 1 keV to 100 GeV. Fluorescence data are derived from the atomic relaxation data available in ENDF/B-VI.8 but use the storage and sampling scheme defined by Everett and Cashwell. The momentum profile (CDBD) data are identical to the data found on MCPLIB03. The MCLIB04 library is designated with the ZAID extension .04p.

    The MCPLIB63 and MCPLIB84 data libraries are new versions of the MCPLIB03 and MCPLIB04 data libraries where the probability of interacting with a given shell is stored using as a cumulative distribution function. MCPLIB63 and MCPLIB84 can be called using the library ID's .63c and .84c respectively. The choice of IDs is intended to keep these updates out of the general sequence of releases and indicate their special nature. It is highly recommended that users of MCNP5 download these updated libraries and replace their existing XSDIR file with a version that includes the MCPLIB63 and MCPLIB84 entries and does not include any reference to the MCPLIB03 and MCPLIB04 versions.


    1. "Photoatomic Data Library MCPLIB04: A New Photoatomic Library Based On Data from ENDF/B-VI Release 8," White, W.C, (2003), LA-UR-03-1019

    2. D. E. Cullen, J. H. Hubbel, and L. D. Kissel, "EPDL97: The Evaluated Photon Data Library, '97 Version," UCRL-50400, Volume 6, Rev. 5, Lawrence Livermore National Laboratory (1997).

    3. "Further Notes on MCPLIB03/04 and New MCPLIB63/84 Compton Broadening Data For All Versions of MCNP5," White, M.C., (2012) LA-UR-12-00018


    MCPLIB04 can be downloaded either as a zip file or as a compressed tarball

    • (sha512 f32610d9a73ebfea83a74fe1c1e664a25ba940293406d55c165fa92a2c1aa64470a4714149ace3218488dbfaf25a3be34a686e1a3def4499991c21636f493ca9)
    • mcplib04.tgz (sha512 ab60709b37dad940c744cdfc5569ab6e0e610fe910e0d3ca748210a40ce45e5ab00135fc2c4c04a4fcb21b54d9326f8ae60de131408e4352abb54aad68ee5205)

    If further information is required contact a member of the Data Team by e-mail at