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