IAEA1435 ZZ-EPICS2023.

ZZ-EPICS2023.

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. The data are 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 is not designed to handle density or molecular and other binding effects that are important at low energies. Nor is it designed to handle NUCLEAR effects, that are important at high energy. This limits the use of this data to ATOMIC data in the keV and MeV energy range

EPICS2023 include three separate databases that are designed to be used in combination. They include:

1) The Evaluated Electron Data Library (EEDL), to describe the interaction of electrons with matter.

2) The Evaluated Photon Data Library (EPDL), to describe the interaction of photons with matter.

3) 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.

These are available in the Extended ENDL format (ENDLX) in which the evaluations were originally performed, as well as in the ENDF format.

UTILITY CODES:

• RELAX: Calculates atomic relaxation spectra of X-rays and electrons due to bound-bound transitions.

DATA LIBRARIES:

• 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 electrons 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

Background Documentation:

[1] EADL2017: Survey of Atomic Binding Energies for use in EPICS2017, Report IAEA-NDS-224, September 2017, IAEA, Vienna, Austria.

[2] EPDL2017: Survey of Atomic Photon Cross Section Data for use in EPICS2017, Report IAEA-NDS-225, November 2017, IAEA, Vienna, Austria.

[5] ENDF Format. ENDF-6 Formats Manual: Data Formats and Procedures for the Evaluated Nuclear Data Files ENDF/B-VI, ENDF/B-VI, and ENDF/B-VIII, CSEWG Document ENDF-102, Report BNL-203218-2018-INRE, Rev. 215, February 2018, Brookhaven National Laboratory (Eds, A. Trkov, M. Herman, D.A. Brown).

[6] PREPRO 2023: 2023 ENDF/B Pre-processing Codes (ENDF/B-VIII.0 Improved Precision), Report IAEA-NDS- 0241, IAEA, Vienna, Austria, June 2023.

[7] Private Communication, Robert J. Howerton, circa 1972.

[8] TART 2022: An Overview of A Coupled Neutron-Photon 3-D, Combinatorial Geometry Time Dependent Monte Carlo Transport Code, Report: LLNL-SM-835527, Code Release: LLNL-CODE-836321, May 2022.

[9] Program EPICSHOW: A Computer Code to Allow Interactive viewing of the EPIC Data Libraries (Version 94-1), UCRL-ID-116819, February 1994.

[10] PENELOPE: F. Salvat, Penelope-2014: A code System for Monte Carlo Simulation of Electron and Photon Transport, Boulogne-Billancourt, France, Tech. Rep. NEA/NSC/DOC(2015)3, 2015.

[11] MCNP: T. Goorley et al., Initial MCNP6 release overview, Nucl. Technol. 180/3 (2012) 298-315.

[12] GEANT4: J. Allison et al., Recent developments in Geant4, Nucl. Instrum. Methods A 835 (2016) 186-225.

[13] FLUKA: T.T. Böhlen et al., The FLUKA code: Developments and challenges for high energy and medical applications, Nucl. Data Sheets 120 (2014) 211-214.

Dermott (Red) Cullen, retired

International Atomic Energy Agency (IAEA)

Wagramer Strasse, 5

P.O. Box 100

Vienna 1400

Austria