Gabriele Cosmo
101 lines
3.9 KiB
C++
101 lines
3.9 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// $Id: SteppingAction.cc,v 1.5 2004/03/31 16:33:36 maire Exp $
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// GEANT4 tag $Name: geant4-06-02 $
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//
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//
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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#include "SteppingAction.hh"
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#include "RunAction.hh"
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#include "G4SteppingManager.hh"
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#include "G4VProcess.hh"
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#include "G4ParticleTypes.hh"
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#ifdef USE_AIDA
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#include "AIDA/IHistogram1D.h"
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#endif
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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SteppingAction::SteppingAction(RunAction* RuAct)
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:runAction(RuAct)
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{ }
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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SteppingAction::~SteppingAction()
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{ }
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void SteppingAction::UserSteppingAction(const G4Step* aStep)
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{
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const G4VProcess* process = aStep->GetPostStepPoint()->GetProcessDefinedStep();
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if (process == 0) return;
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G4String processName = process->GetProcessName();
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if (processName != "GammaToMuPair") return;
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G4StepPoint* PrePoint = aStep->GetPreStepPoint();
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G4double EGamma = PrePoint->GetTotalEnergy();
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G4ThreeVector PGamma = PrePoint->GetMomentum();
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G4double Eplus(0), Eminus(0);
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G4ThreeVector Pplus , Pminus;
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G4TrackVector* secondary = fpSteppingManager->GetSecondary();
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for (size_t lp=0; lp<(*secondary).size(); lp++) {
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if ((*secondary)[lp]->GetDefinition()==G4MuonPlus::MuonPlusDefinition()) {
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Eplus = (*secondary)[lp]->GetTotalEnergy();
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Pplus = (*secondary)[lp]->GetMomentum();
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} else {
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Eminus = (*secondary)[lp]->GetTotalEnergy();
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Pminus = (*secondary)[lp]->GetMomentum();
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}
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}
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G4double xPlus = Eplus/EGamma, xMinus = Eminus/EGamma;
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G4double thetaPlus = PGamma.angle(Pplus), thetaMinus = PGamma.angle(Pminus);
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static const G4double muonMass=G4MuonPlus::MuonPlus()->GetPDGMass();
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G4double GammaPlus=EGamma*xPlus/muonMass;
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G4double GammaMinus=EGamma*xMinus/muonMass;
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#ifdef USE_AIDA
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runAction->GetHisto(0)->fill(1./(1.+pow(thetaPlus*GammaPlus,2)));
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runAction->GetHisto(1)->fill(log10(thetaPlus*GammaPlus));
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runAction->GetHisto(2)->fill(log10(thetaMinus*GammaMinus));
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runAction->GetHisto(3)->fill(log10(fabs(thetaPlus *GammaPlus
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-thetaMinus*GammaMinus)));
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runAction->GetHisto(4)->fill(xPlus);
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runAction->GetHisto(5)->fill(xMinus);
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#endif
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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