Geant4 8.3 Release Notes
May 4th, 2007

The code and binary libraries for the supported systems are available through our Source Code Web page.

Please refer to the Geant4 User Documentation for further information about using Geant4.


  1. Supported and Tested Platforms
  2. CLHEP and AIDA
  3. Items for migration of the user code
  4. Expected effects on physics and performance
  5. Known Run-Time Problems
  6. Compilation Warnings
  7. Known Run-Time Warnings
  8. Geant4 Software License
  9. Detailed list of changes and fixes

1. Supported and Tested Platforms

Official platforms: More verified configurations: Platforms configured but not tested and not supported:


Geant4 8.3 requires the installation of CLHEP.
Tests have been performed with CLHEP-
The software has been verified also with CLHEP-

Geant4 8.3 examples with histogramming cowork with analysis tools compliant to AIDA 3.2.1 interfaces.
AIDA headers can be downloaded from:

3. Items for migration of the user code

No particular migrations are required in order to upgrade from release 8.2 to release 8.3. Note that a full re-installation of libraries (or a full recompilation) and a recompilation of user applications is anyhow required.

4. Expected effects on physics and performance

Standard Electromagnetic physics Hadronic physics Physics Lists

5. Known Run-Time Problems and Limitations

For a complete list of outstanding run-time problems and to submit any problem you may find running this version of Geant4, please refer to the Geant4 Problem Reporting System.

6. Compilation Warnings

There may be compilation warnings on some platforms. We do not believe that any will lead to incorrect run-time behaviour.

7. Known Run-Time Warnings

The following message can be written to error output while tracking. We believe it does not give rise to incorrect behaviour.
    G4PropagateInField: Warning: Particle is looping 
    -  tracking in field will be stopped. 
       It has performed 1000 steps in Field while a maximum of 1000
       are allowed. 

8. Geant4 Software License

A Software License applies to the Geant4 code. The details and the list of copyright holders is available at and also in a text file LICENSE distributed with the source code.

9. Detailed list of changes and fixes

These are the main new features/fixes included in this release since the last patched public release (for the detailed list of fixes/additions, please refer to the related History files provided in most packages):


Digitization & Hits

Electromagnetic Processes (High-energy and Standard)


General Processes: Cuts, Scoring



Graphical Representations

Hadronic Processes


Physics lists