1 | // |
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2 | // ******************************************************************** |
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3 | // * DISCLAIMER * |
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4 | // * * |
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5 | // * The following disclaimer summarizes all the specific disclaimers * |
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6 | // * of contributors to this software. The specific disclaimers,which * |
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7 | // * govern, are listed with their locations in: * |
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8 | // * http://cern.ch/geant4/license * |
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9 | // * * |
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10 | // * Neither the authors of this software system, nor their employing * |
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11 | // * institutes,nor the agencies providing financial support for this * |
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12 | // * work make any representation or warranty, express or implied, * |
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13 | // * regarding this software system or assume any liability for its * |
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14 | // * use. * |
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15 | // * * |
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16 | // * This code implementation is the intellectual property of the * |
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17 | // * GEANT4 collaboration. * |
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18 | // * By copying, distributing or modifying the Program (or any work * |
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19 | // * based on the Program) you indicate your acceptance of this * |
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20 | // * statement, and all its terms. * |
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21 | // ******************************************************************** |
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22 | // |
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23 | #include "G4ScattererStub.hh" |
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24 | #include "G4Proton.hh" |
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25 | #include "G4Neutron.hh" |
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26 | |
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27 | |
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28 | int main(int argc, char ** argv) |
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29 | { |
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30 | G4int nEvents; |
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31 | if(argc == 2) |
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32 | nEvents = atoi(argv[1]); |
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33 | else |
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34 | { |
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35 | cout << "Input number of events: "; |
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36 | cin >> nEvents; |
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37 | } |
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38 | |
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39 | G4ScattererStub scatterer; |
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40 | |
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41 | G4ParticleDefinition * proton = G4Proton::Proton(); |
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42 | G4ParticleDefinition * neutron = G4Neutron::Neutron(); |
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43 | G4double pmass = proton->GetPDGMass(); |
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44 | G4double nmass = neutron->GetPDGMass(); |
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45 | |
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46 | G4ThreeVector pos(0,0,0); |
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47 | |
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48 | for(G4int i = 0; i < nEvents; ++i) |
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49 | { |
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50 | G4double p = 1000*MeV*G4UniformRand(); |
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51 | G4double theta = 2.0*G4UniformRand()-1.0; |
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52 | theta = acos(theta); |
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53 | G4double phi = G4UniformRand()*2*pi; |
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54 | G4ThreeVector direction(sin(theta)*cos(phi), |
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55 | sin(theta)*sin(phi), cos(theta)); |
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56 | G4LorentzVector mom1(p*direction, sqrt(p*p+pmass*pmass)); |
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57 | p = 1000*MeV*G4UniformRand(); |
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58 | theta = 2.0*G4UniformRand()-1.0; |
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59 | theta = acos(theta); |
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60 | phi = G4UniformRand()*2*pi; |
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61 | G4ThreeVector direction2(sin(theta)*cos(phi), sin(theta)*sin(phi), cos(theta)); |
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62 | G4LorentzVector mom2(p*direction2, sqrt(p*p+nmass*nmass)); |
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63 | |
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64 | G4KineticTrack kt1(proton, 0.0, pos, mom1); |
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65 | G4KineticTrack kt2(proton, 0.0, pos, mom2); |
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66 | |
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67 | G4KineticTrackVectorSTL * products = scatterer.Scatter(kt1, kt2); |
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68 | G4KineticTrackVectorSTL::iterator i = products->begin(); |
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69 | G4LorentzVector fmom1 = (*i)->Get4Momentum(); |
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70 | ++i; |
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71 | G4LorentzVector fmom2 = (*i)->Get4Momentum(); |
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72 | G4LorentzVector diff = fmom1+fmom2-mom1-mom2; |
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73 | G4LorentzVector diff1 = fmom1-mom1; |
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74 | G4LorentzVector diff2 = fmom2-mom2; |
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75 | cout << diff1.x() << " " << diff1.y() << " " << diff1.z() << " " |
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76 | << diff1.t() << " " |
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77 | << diff2.x() << " " << diff2.y() << " " << diff2.z() << " " |
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78 | << diff2.t() << " " |
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79 | << diff.x() << " " << diff.y() << " " << diff.z() << " " |
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80 | << diff.t() << " " |
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81 | << fmom1.m() << " " << fmom2.m() << endl; |
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82 | } |
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83 | |
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84 | |
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85 | return 0; |
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86 | } |
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87 | |
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88 | |
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89 | |
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90 | |
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