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Title: Electron Photon Interaction Cross Sections

Version 00 The Electron Photon Interaction Cross Sections, EPICS, provides the atomic data needed to perform coupled Electron-Photon transport calculations, to produce accurate macroscopic results, such as energy deposit and dose. Atomic data is provided for elements, Z = 1 to 100, over the energy range 10 eV to 100 GeV; note that nuclear data, such as photo-nuclear, and data for compounds, are not included. All data is in a simple computer independent text format that is standard and presented to a high precision that can be easily read by computer codes written in any computer language, e.g., C, C++, and FORTRAN. EPICS includes four separate data bases that are designed to be used in combination, these include, • The Evaluated Electron Data Library (EEDL), to describe the interaction of electrons with matter. • The Evaluated Photon Data Library (EPDL), to describe the interaction of photons with matter. • The Evaluated Atomic Data Library (EADL), to describe the emission of electrons and photons back to neutrality following an ionizing event, caused by either electron or photon interactions. • The Evaluated Excitation Data Library (EXDL), to describe the excitation of atoms due to photon interaction. All of these are available inmore » the Extended ENDL format (ENDLX) in which the evaluations were originally performed. The first three are also available in the ENDF format; as yet ENDF does not include formats to handle excitation data (EXDL).« less
Authors:
Publication Date:
OSTI Identifier:
1278490
Report Number(s):
EPICS2014; 004580MLTPL00
RSICC ID: D00272MNYCP
DOE Contract Number:
AC05-00OR22725
Software Revision:
00
Software Package Number:
004580
Software CPU:
MLTPL
Source Code Available:
No
Other Software Info:
Owner Installation: International Atomic Energy Agency Contributors:International Atomic Energy Agency, IAEA, Vienna, Austria. Photon interaction data has been used at Lawrence Livermore National Laboratory (LLNL) for well over 50 years. Roughly 25 years ago this photon data library was greatly expanded in detail to define EPDL, by including: photoelectric Sub-shell data, anomalous scattering factors, excitation, etc. Soon after this expansion electron interaction data, EEDL, was added, to allow completely coupled electron photon transport calculation to accuracy determine macroscopic quantities, such as energy deposit and dose. At that time the LLNL data libraries were adopted as the standard ENDF/B data for photon and electron transport calculations, and today they still are the standard data included in the ENDF/B-VII.1 library. The data libraries have been modernized by reviewing recently published data and making changes where necessary. Also electron interaction data has been corrected that was incorrectly translated from the ENDL to the ENDF format, namely MF/MT=26/527, which is defined as the average secondary electron energy after Bremsstrahlung – it is now correct – earlier it was the energy lost, not what was retained by the electron. EPICS2014 is the Electron Photon Interaction Cross Section library that provides the atomic data needed to perform coupled Electron-Photon transport calculations, to produce accurate macroscopic results, such as energy deposition and dose. Atomic data is provided for elements, Z = 1 to 100, over the energy range 10 eV to 100 GeV; nuclear data, such as photo-nuclear, and data for compounds, are not included. KEYWORDS: EVALUATED GAMMA-RAY CROSS SECTIONS; ELECTRON CROSS SECTIONS
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States

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