This example shows how to use Geant4 as a generator for simulating inelastic hadron-nuclear interactions.

The class HadronicGenerator is the "generator". The main hadronic models (FTFP, QGSP, BERT, BIC, IonBIC, INCL) and some combinations of two of them - in a transition energy region, similarly to what happens in physics lists - are available. See include/HadronicGenerator.hh for more detailed information.

The main, Hadr09.cc, shows an example of how to use it. It samples randomly the projectile hadron, its energy, its direction and the target material, and then it calls the generator. Some information regarding the secondaries which are produced can be printed out. See the comments in Hadr09.cc for more information and how eventually to change some of its configurations. Notice that Hadr09.cc does nothing really useful: users should consider to use eventually only the class HadronicGenerator.

Notice that the Geant4 run-manager is not used.

HOW TO START ?

To build it:

  mkdir Build; cd Build
  cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo \
        -DGeant4_DIR=/path-to-geant4-libraries ../.
  make

To run it:

  ./Hadr09

which simulates 1000 hadron-nucleus collisions, randomnly selected, and prints out some information about the secondaries produced in these interactions. It takes only a few seconds to run.

Note: this example has been included in Geant4 10.7, but it should work also for early versions of Geant4, in particular 10.6, 10.5 and 10.4.