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26 // 26 //
27 /// \file exoticphysics/ucn/src/ExUCNPrimaryGe 27 /// \file exoticphysics/ucn/src/ExUCNPrimaryGeneratorAction.cc
28 /// \brief Implementation of the ExUCNPrimaryG 28 /// \brief Implementation of the ExUCNPrimaryGeneratorAction class
29 // 29 //
30 30
31 //....oooOO0OOooo........oooOO0OOooo........oo 31 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
32 //....oooOO0OOooo........oooOO0OOooo........oo 32 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
33 33
34 #include "ExUCNPrimaryGeneratorAction.hh" 34 #include "ExUCNPrimaryGeneratorAction.hh"
35 35
36 #include "ExUCNDetectorConstruction.hh" 36 #include "ExUCNDetectorConstruction.hh"
37 37
38 #include "G4Event.hh" 38 #include "G4Event.hh"
39 #include "G4ParticleDefinition.hh" <<
40 #include "G4ParticleGun.hh" 39 #include "G4ParticleGun.hh"
41 #include "G4ParticleTable.hh" 40 #include "G4ParticleTable.hh"
>> 41 #include "G4ParticleDefinition.hh"
>> 42 #include "Randomize.hh"
42 #include "G4PhysicalConstants.hh" 43 #include "G4PhysicalConstants.hh"
43 #include "G4SystemOfUnits.hh" 44 #include "G4SystemOfUnits.hh"
44 #include "Randomize.hh" <<
45 45
46 //....oooOO0OOooo........oooOO0OOooo........oo 46 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
47 47
48 ExUCNPrimaryGeneratorAction::ExUCNPrimaryGener 48 ExUCNPrimaryGeneratorAction::ExUCNPrimaryGeneratorAction(void)
49 { 49 {
50 G4int n_particle = 1; 50 G4int n_particle = 1;
51 fParticleGun = new G4ParticleGun(n_particle) << 51 fParticleGun = new G4ParticleGun(n_particle);
52 52
53 G4ParticleTable* particleTable = G4ParticleT 53 G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
54 54
55 G4ParticleDefinition* particle = particleTab 55 G4ParticleDefinition* particle = particleTable->FindParticle("neutron");
56 fParticleGun->SetParticleDefinition(particle 56 fParticleGun->SetParticleDefinition(particle);
57 } 57 }
58 58
59 //....oooOO0OOooo........oooOO0OOooo........oo 59 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
60 60
61 ExUCNPrimaryGeneratorAction::~ExUCNPrimaryGene 61 ExUCNPrimaryGeneratorAction::~ExUCNPrimaryGeneratorAction()
62 { 62 {
63 delete fParticleGun; 63 delete fParticleGun;
64 } 64 }
65 65
66 //....oooOO0OOooo........oooOO0OOooo........oo 66 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
67 67
68 void ExUCNPrimaryGeneratorAction::GeneratePrim 68 void ExUCNPrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
69 { 69 {
70 // This function is called at the begining o 70 // This function is called at the begining of event
71 71
72 fParticleGun->SetParticlePosition(G4ThreeVec 72 fParticleGun->SetParticlePosition(G4ThreeVector(0.0, 0.0, 0.0));
73 fParticleGun->SetParticlePolarization(G4Thre << 73 fParticleGun->SetParticlePolarization(G4ThreeVector(0,1,0));
74 74
75 G4double particleEnergy = 1e-9 * eV + G4Unif << 75 G4double particleEnergy = 1e-9*eV + G4UniformRand()*(1e-7*eV-1e-9*eV);
76 fParticleGun->SetParticleEnergy(particleEner 76 fParticleGun->SetParticleEnergy(particleEnergy);
77 77
78 G4double theta = 2 * pi * G4UniformRand(); << 78 G4double theta = 2*pi*G4UniformRand();
79 G4double phi = std::acos(1 - 2 * G4UniformRa << 79 G4double phi = std::acos(1-2*G4UniformRand());
80 if (phi > pi / 2 && phi < pi) phi = pi - phi << 80 if (phi > pi/2 && phi < pi) phi = pi-phi;
81 81
82 G4double z = std::sin(phi) * std::cos(theta) << 82 G4double z = std::sin(phi)*std::cos(theta);
83 G4double x = std::sin(phi) * std::sin(theta) << 83 G4double x = std::sin(phi)*std::sin(theta);
84 G4double y = std::cos(phi); 84 G4double y = std::cos(phi);
85 85
86 fParticleGun->SetParticleMomentumDirection(G << 86 fParticleGun->SetParticleMomentumDirection(G4ThreeVector(x,y,z));
87 87
88 fParticleGun->GeneratePrimaryVertex(anEvent) 88 fParticleGun->GeneratePrimaryVertex(anEvent);
89 } 89 }
90 90
91 //....oooOO0OOooo........oooOO0OOooo........oo 91 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
92 92