Exercise3 - Proton
Modify the beam to shoot 100 MeV proton instead of gamma (ex3.mac). Note that the physic-list has been changed. More information on the physic lists can be obtained:
- http://geant4.cern.ch/support/proc_mod_catalog/physics_lists/useCases.shtml
- http://wiki.opengatecollaboration.org/index.php/Users_Guide:Setting_up_the_physics
Observe the computation time, the numbers of track/steps and the uncertainty. What are the differences with photon beam ? Again, you can use Python to plot the deposited energy as a function of the depth and obtain the Bragg peak.
Add a dense volume in the path of the proton to observe the effects.