| [1199] | 1 | //
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| 2 | // ********************************************************************
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| 3 | // * License and Disclaimer *
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| 4 | // * *
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of *
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and *
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| 7 | // * conditions of the Geant4 Software License, included in the file *
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These *
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| 9 | // * include a list of copyright holders. *
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| 10 | // * *
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| 11 | // * Neither the authors of this software system, nor their employing *
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| 12 | // * institutes,nor the agencies providing financial support for this *
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| 13 | // * work make any representation or warranty, express or implied, *
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| 14 | // * regarding this software system or assume any liability for its *
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| 15 | // * use. Please see the license in the file LICENSE and URL above *
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| 16 | // * for the full disclaimer and the limitation of liability. *
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| 17 | // * *
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| 18 | // * This code implementation is the result of the scientific and *
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| 19 | // * technical work of the GEANT4 collaboration. *
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| 20 | // * By using, copying, modifying or distributing the software (or *
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| 21 | // * any work based on the software) you agree to acknowledge its *
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| 22 | // * use in resulting scientific publications, and indicate your *
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| 23 | // * acceptance of all terms of the Geant4 Software license. *
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| 24 | // ********************************************************************
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| 25 | //
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| 26 | // -------------------------------------------------------------------
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| 27 | // GEANT 4 class file --- Copyright CERN 1998
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| 28 | // CERN Geneva Switzerland
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| 29 | //
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| 30 | //
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| 31 | // File name: eegg -> unit test of e+e- -> gg model
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| 32 | //
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| 33 | // Author: V.Ivanchenko
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| 34 | //
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| 35 | // Creation date: 19 October 2006
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| 36 | //
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| 37 | // Modifications:
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| 38 | //
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| 39 | // -------------------------------------------------------------------
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| 40 |
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| 41 | #include "globals.hh"
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| 42 | #include "G4eeToTwoGammaModel.hh"
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| 43 | #include "G4eeToTwoGammaModel82.hh"
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| 44 | #include "G4MaterialCutsCouple.hh"
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| 45 | #include "G4DynamicParticle.hh"
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| 46 | #include "G4ThreeVector.hh"
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| 47 | #include "G4Positron.hh"
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| 48 | #include "G4ios.hh"
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| 49 | #include "TFile.h"
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| 50 | #include "TH1F.h"
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| 51 | #include <iostream>
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| 52 | #include <fstream>
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| 53 | #include <string>
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| 54 | #include <iomanip>
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| 55 | #include <vector>
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| 56 |
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| 57 | int main(int argc, char** argv)
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| 58 | {
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| 59 | // G4int verbose = 2;
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| 60 | G4int nstat = 10000;
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| 61 | G4double energy = 10.*GeV;
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| 62 | G4double etot = energy + 2.0*electron_mass_c2;
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| 63 |
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| 64 | G4MaterialCutsCouple* couple = 0;
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| 65 | G4ThreeVector dir(0.0,0.0,1.0);
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| 66 | G4DynamicParticle* dp0 = new G4DynamicParticle(G4Positron::Positron(),
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| 67 | dir,energy);
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| 68 | G4DynamicParticle* dp;
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| 69 |
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| 70 | G4eeToTwoGammaModel* eegg =
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| 71 | new G4eeToTwoGammaModel(G4Positron::Positron(),"eegg");
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| 72 | G4eeToTwoGammaModel82* eegg82 =
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| 73 | new G4eeToTwoGammaModel82(G4Positron::Positron(),"eegg82");
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| 74 |
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| 75 | std::vector<G4DynamicParticle*>* vdp;
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| 76 |
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| 77 | TFile tree("eegg10gev.root","RECREATE","eegg");
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| 78 |
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| 79 | TH1D* h1 = new TH1D( "h1","Gamma Energy",120,0,1);
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| 80 | TH1D* h2 = new TH1D( "h2","Gamma Energy",120,0,1);
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| 81 | TH1D* h3 = new TH1D( "h3","cos(theta) lab",100,-1,1);
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| 82 | TH1D* h4 = new TH1D( "h4","cos(theta) lab",100,-1,1);
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| 83 |
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| 84 | G4int i, j, n;
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| 85 |
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| 86 | for(i=0; i<nstat; i++) {
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| 87 | vdp = eegg->SampleSecondaries(couple,dp0,0,0);
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| 88 | n = vdp->size();
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| 89 | for(j=0; j<n; j++) {
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| 90 | dp = (*vdp)[j];
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| 91 | h1->Fill(dp->GetKineticEnergy()/etot);
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| 92 | h3->Fill(dp->GetMomentumDirection().z());
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| 93 | delete dp;
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| 94 | }
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| 95 | delete vdp;
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| 96 | vdp = eegg82->SampleSecondaries(couple,dp0,0,0);
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| 97 | n = vdp->size();
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| 98 | for(j=0; j<n; j++) {
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| 99 | dp = (*vdp)[j];
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| 100 | h2->Fill(dp->GetKineticEnergy()/etot);
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| 101 | h4->Fill(dp->GetMomentumDirection().z());
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| 102 | delete dp;
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| 103 | }
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| 104 | delete vdp;
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| 105 | }
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| 106 | tree.Write();
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| 107 | tree.Close();
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| 108 |
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| 109 | return 0;
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| 110 | }
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| 111 |
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