Geant4

Geant4 is an open-source toolkit for simulating how particles pass through matter. It supports research and applications in high-energy, nuclear and accelerator physics, as well as medical and space science. The project provides source code and installers for download, alongside online documentation, tutorials and practical guides to help users get started and develop simulations.

Geant4 also offers resources for its user community, including a forum, bug reporting, release information and events such as advanced courses, tutorials and user workshops. The website introduces the toolkit and its areas of use, shares details about the Geant4 collaboration, and explains how external users can contribute. Its ongoing releases and planned features provide users with updates on the software’s development. Researchers and practitioners who use Geant4 are also directed to cite the project’s published papers, which document its development and applications. Through its software, learning materials and community resources, Geant4 serves people working across scientific fields that rely on particle-transport simulation.