Electromagnetic Physics


The electromagnetic (EM) physics working group develops and maintains Geant4 sub-packages for simulation of electromagnetic interactions of charged particles, gammas and optical photons. The validity range of models is from threshold to 10 PeV. The "standard" physics approaches are optimal for high and medium energy applications. The "low-energy" sub-library is developed for low-energy applications. The group is maintaining also components for reference Physics Lists and a number of extended examples.

The EM working group actively develops physics models and corresponding software for High Energy Physics applications, first of all for experiments at LHC (CERN). In June 2019, the former low-energy electromagnetic physics working group joined the EM group and continues development and support for various applications of Geant4. Part of the EM working group members are active developers of the Geant4-DNA project for the simulation of biological effects of radiation. Another part are members of the Geant4 medical physics benchmarking group (G4MSBG), which was created for consolidation of the Geant4 testing system for medical physics applications. The EM group is also working in close collaboration with ESA-ESTEC on space science applications of Geant4.


Suspended Geant4 and Standard Electromagnetic Physics group members

Collaborators developed polarized processes (not Geant4 members)

Collaborators developed Coulomb scattering models (not Geant4 members)

Geant4 Virtual Machine

  • Geant4 for VMware and VirtualBox is a link to a free and ready-to-use software suite allowing you to run entirely Geant4 (a so-called Geant4 Virtual Machine) and associated tools on a Windows PC or Mac under the VMware or VirtualBox software without the need for a local Geant4 installation
  • Follow us on Geant4VM on Twitter for updates of this virtual machine.


User support

The group is providing and maintaining the following categories of extended examples :

  • electromagnetic
  • exoticphysics
  • medical
  • optical
  • polarisation

We suggest our users to visit the Forum, which is the best way to exchange information.