Implementation of the EPICS2017 database for photons in Geant4.

Area of Science:

• Nuclear Physics
• Computational Physics
• Medical Physics

Background:

• Accurate simulation of low-energy photon transport is crucial for various scientific applications.
• Existing Geant4 Livermore electromagnetic models require updates for improved precision.
• The EPICS2017 database offers new data for photon interactions.

Purpose of the Study:

• To implement and validate new Geant4 Livermore electromagnetic physics models for low-energy photon transport.
• To enhance the precision of photon interaction simulations using the EPICS2017 database.
• To compare the performance of new parameterizations against existing models and reference data.

Main Methods:

• Detailed implementation of Geant4 Livermore models incorporating EPICS2017 data.
• Development of new parameterizations for Compton scattering, photoelectric effect, and Rayleigh scattering.
• Comparative analysis of mass attenuation coefficients using Geant4 simulations with EPICS2017 and EPDL97.

Main Results:

• New parameterizations for photon processes show improved precision compared to tabulated values.
• Geant4 simulations using EPICS2017 demonstrate good agreement with XCOM reference data for mass attenuation coefficients.
• The updated models provide more accurate simulations for total photon interaction and individual processes.

Conclusions:

• The implemented Geant4 Livermore models based on EPICS2017 offer enhanced precision for low-energy photon transport.
• These updated models are suitable for applications requiring accurate simulation of photon interactions.
• The study validates the effectiveness of the EPICS2017 database in improving electromagnetic physics simulations.