Electron/Photon/Relaxation Data Library—eprdata14

    Released: 2015-07-02

    The eprdata14 library is based on the EPICS2014 (Electron and Photon Interaction Cross Section) data from the IAEA, prepared Dermott E. "Red" Cullen. It was processed into ACE format by H. Grady Hughes at Los Alamos National Laboratory.

    There is data for elements hydrogen (Z=1) to Fermium (Z=100). All of the ZAIDS are elemental and so the A is 000 for every data table. For example, the ZA 1000 is for hydrogen, 26000 for iron, 92000 for uranium, and similarly for all other elements. All of the ZAIDS in the eprdata14 library use the .14p extension.

    Please note that this data was not produced by the Nuclear Data Team at Los Alamos National Laboratory and therefore support for this library is limited.


    There is little documentation about the eprdata14 library specifically, but the data associated with the eprdata12 library is illustrative.

    • "Improvements in Electron-Photon-Relaxation Data for MCNP6", Hughes, Henry Grady III, 13th International Conference on Radiation Shielding (ICRS-13) and 19th Topical Meeting of the Radiation Protection & Shielding Division of the American Nuclear Society (2016) LA-UR-16-20840
    • "An Electron/Photon/Relaxation Data Library for MCNP6," Hughes, H.G, (2013) LA-UR-13-27377
    • "Some Notes on EPRDATA and MCNP", D. Kent Parsons, (2022) LA-UR-22-27131


    EPRData14 can be downloaded either as a zip file or as a compressed tarball

    • eprdata14.tgz (sha512 bc69548390f8e3215295c8ddea7e50644adedfbabd4a7a20acfe6788bc6d809ed292369b61725bae9e0c79248143ce197bcf36136a3f6845c3326206572cf72c)
    • (sha512 701445be628757d1bbd5de5773c882792c44b30a476dd2cd47615d77e43c39bbcd0c0cca675dedc850660a5343c57266af2927042f7dbd8fd005ee9607829a66)

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