PairConversions.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
 
"""
This script saves e+ or e- from photon conversions into a pair in MCParticles.
 
<header>
  <contact>dorisykim@ssu.ac.kr</contact>
  <description>
      Saves 100 EvtGen events + secondary e+ or e- from pair conversions created by Geant4 in MCParticles.
      The corresponding secondaryPhysicsProcess ID is 14, which is defined as fGammaConversion in G4EmProcessSubType.h.
  </description>
</header>
"""
 
from basf2 import *
 
main = create_path()
 
# create 100 events
main.add_module("EventInfoSetter", evtNumList=[100])
 
# using standard evtgen
main.add_module("EvtGenInput")
 
# and parameters
main.add_module("Gearbox")
 
# and the geometry
main.add_module("Geometry")
 
# as well as the simulation, saving e+ or e- from pair conversions with kinetic energy > 10.0 MeV.
main.add_module("FullSim", StorePairConversions=True, PairConversionsEnergyCut=10.0)
 
# output
main.add_module("RootOutput", outputFileName="EvtGenSimNoBkgYesPairConversions.root")
 
# run it
process(main)
 
# Print call statistics
print(statistics)