Geant4 at Jefferson Lab

Latest News: The new public release of Geant4, Geant4 11.3, is available.


Geant4 is a Toolkit for the simulation of the passage of particles through matter. Its areas of application include high energy, nuclear and accelerator physics, as well as studies in medical and space science.

At Jefferson Lab we use Geant4 for the simulation of our experimental setups, in order to:

  • Optimize the design of detectors
  • Minimize the background / signal ratio
  • Understand and account for the detector responses
  • Develop and test the reconstruction algorithms
  • Calculate radiation doses on the detector and its electronics



Geant4 Tutorials
Use Geant4

Geant4 Use Cases at Jefferson Lab
Geant4 validation at JLab's energies



Jefferson Lab Support:

  • Latest version of Geant4: 11.3.0
  • Geant4 Versions: 10.6.2 - 10.7.4 - 11.2.2 - 11.3.0
  • Platforms: AlmaLinux 9.4 - Ubuntu24 - Fedora36 - MacOS 15 (Sequoia)