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 //
 // ********************************************************************
 // * License and Disclaimer                                           *
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 // * The  Geant4 software  is  copyright of the Copyright Holders  of *
 // * the Geant4 Collaboration.  It is provided  under  the terms  and *
 // * conditions of the Geant4 Software License,  included in the file *
 // * LICENSE and available at  http://cern.ch/geant4/license .  These *
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 // * work  make  any representation or  warranty, express or implied, *
 // * regarding  this  software system or assume any liability for its *
 // * use.  Please see the license in the file  LICENSE  and URL above *
 // * for the full disclaimer and the limitation of liability.         *
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 // * This  code  implementation is the result of  the  scientific and *
 // * technical work of the GEANT4 collaboration.                      *
 // * By using,  copying,  modifying or  distributing the software (or *
 // * any work based  on the software)  you  agree  to acknowledge its *
 // * use  in  resulting  scientific  publications,  and indicate your *
 // * acceptance of all terms of the Geant4 Software license.          *
 // ********************************************************************
 //
 // This example is provided by the Geant4-DNA collaboration
 // Any report or published results obtained using the Geant4-DNA software
 // shall cite the following Geant4-DNA collaboration publication:
 // Med. Phys. 37 (2010) 4692-4708
 // J. Comput. Phys. 274 (2014) 841-882
 // The Geant4-DNA web site is available at http://geant4-dna.org
 //
 //
 /// \file SteppingAction.cc
 /// \brief Implementation of the SteppingAction class
 
 #include "SteppingAction.hh"
 
 #include "EventAction.hh"
 
 #include "G4SteppingManager.hh"
 
 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 SteppingAction::SteppingAction(EventAction* event) : G4UserSteppingAction(), fEventAction(event) {}
 
 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 void SteppingAction::UserSteppingAction(const G4Step* step)
 {
   // /////////////////////////////////////////
   // killing primary particles (any heavy charged particle) that hit the
   // collimator
   auto part_name = step->GetTrack()->GetParticleDefinition()->GetParticleName();
   if (step->GetPreStepPoint()->GetPhysicalVolume()->GetName() == "collPhys"
       && step->GetTrack()->GetParticleDefinition()->GetParticleName() == "alpha")
   {
     step->GetTrack()->SetTrackStatus(fStopAndKill);
     fEventAction->InvalidEvent();
     return;  // nothing more to do in such case
   }
 
   // /////////////////////////////////////////
   // recording energy of the primary particle at three different locations:
   // 1. Boundary between World and Mylar wall, i.e. initial energy of the
   // particle.
   // 2. Boundary between World and silicon detector, i.e. final energy of the
   // particle.
   // 3. Boundary between wall inner layer (innerWall) and Target, i.e.
   // interaction energy of the particle.
 
   if (step->GetTrack()->GetParticleDefinition()->GetParticleName() == "alpha") {
     // 1. and 2. - particle crossing the boundary between World volume
     if (step->GetPreStepPoint()->GetPhysicalVolume()->GetName() == "worldPhys") {
       auto physVol = step->GetPostStepPoint()->GetPhysicalVolume();
       // the above may be a null pointer as the particle can leave world, so it
       // has to be tested:
       if (physVol) {
         // 1. to Mylar wall
         if (physVol->GetName() == "wallPhys") {
           fEventAction->RecordInitialEnergy(step->GetTrack()->GetKineticEnergy());
         }
         // 2. to silicon detector
         if (physVol->GetName() == "enDetPhys") {
           fEventAction->RecordFinalEnergy(step->GetTrack()->GetKineticEnergy());
         }
       }
     }
 
     // 3. - particle crossing the boundary from wall inner layer to the target
     if (step->GetPreStepPoint()->GetPhysicalVolume()->GetName() == "innerWallPhys") {
       if (step->GetPostStepPoint()->GetPhysicalVolume()->GetName() == "targetPhys") {
         fEventAction->RecordInteractionEnergy(step->GetTrack()->GetKineticEnergy());
       }
     }
   }
 
   // ////////////////////////////////////////
   // counting individual ionization acts
   // only ionisations in the target will be recorded
   if (step->GetPreStepPoint()->GetPhysicalVolume()->GetName() == "targetPhys") {
     if (step->GetTotalEnergyDeposit() != 0) {
       G4String process_name = step->GetPostStepPoint()->GetProcessDefinedStep()->GetProcessName();
 
       // counting ionisations caused only by electrons and alpha particles:
       //            if(process_name=="e-_G4DNAIonisation" ||
       //            process_name=="alpha_G4DNAIonisation");
       //                fEventAction->AddIonisation();
 
       // more general approach - counting ionisations caused by any particle
       // (including also protons, GenericIons, etc.):
       auto pos =
         process_name.find("Ionisation");  // looking for "Ionisation" substring in process_name
       if (pos != std::string::npos)  // found!
         fEventAction->AddIonisation();  // increase cluster size
     }
   }
 }
 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

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