Geant4 (source code)

= Geant4
{wiki=Geant4}

Geant4 is a software toolkit for the simulation of the passage of particles through matter. It is widely used in high-energy physics, astrophysics, medical physics, and radiation protection applications. Developed by CERN (the European Organization for Nuclear Research), Geant4 provides a comprehensive and flexible framework for modeling the interactions of particles with matter, allowing users to simulate complex systems and understand the underlying physical processes.