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25 //
26 /// \file exoticphysics/phonon/src/XPrimaryGeneratorAction.cc
27 /// \brief Implementation of the XPrimaryGeneratorAction class
28 //
29 //
30
31 #include "XPrimaryGeneratorAction.hh"
32
33 #include "G4Event.hh"
34 #include "G4ParticleGun.hh"
35 #include "G4PhononLong.hh"
36 #include "G4PhononTransFast.hh"
37 #include "G4PhononTransSlow.hh"
38 #include "G4RandomDirection.hh"
39 #include "G4SystemOfUnits.hh"
40
41 using namespace std;
42
43 XPrimaryGeneratorAction::XPrimaryGeneratorAction()
44 {
45 G4int n_particle = 1;
46 fParticleGun = new G4ParticleGun(n_particle);
47
48 // default particle kinematic
49 fParticleGun->SetParticleDefinition(G4PhononLong::PhononDefinition());
50 fParticleGun->SetParticleMomentumDirection(G4RandomDirection());
51 fParticleGun->SetParticlePosition(G4ThreeVector(0.0, 0.0, 0.0));
52 fParticleGun->SetParticleEnergy(1e-4 * eV);
53 }
54
55 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
56
57 XPrimaryGeneratorAction::~XPrimaryGeneratorAction()
58 {
59 delete fParticleGun;
60 }
61
62 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
63
64 void XPrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
65 {
66 fParticleGun->SetParticleMomentumDirection(G4RandomDirection());
67
68 G4double selector = G4UniformRand();
69 if (selector < 0.53539) {
70 fParticleGun->SetParticleDefinition(G4PhononTransSlow::PhononDefinition());
71 }
72 else if (selector < 0.90217) {
73 fParticleGun->SetParticleDefinition(G4PhononTransFast::PhononDefinition());
74 }
75 else {
76 fParticleGun->SetParticleDefinition(G4PhononLong::PhononDefinition());
77 }
78
79 // Set phonon energy.
80 // Do not set momentum direction here.
81 // Any momentum direction set here will be overwritten
82 // by XPhononStackingAction::ClassifyNewTrack
83 fParticleGun->SetParticleEnergy(0.0075 * eV);
84 fParticleGun->GeneratePrimaryVertex(anEvent);
85 }
86
87 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
88