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25 //
26 #include "G4LEPTSElasticModel.hh"
27
28 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
29 G4LEPTSElasticModel::G4LEPTSElasticModel(const G4String& modelName)
30 : G4VLEPTSModel( modelName )
31 {
32 theXSType = XSElastic;
33 fParticleChangeForGamma = nullptr;
34 } // constructor
35
36
37 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
38 G4LEPTSElasticModel::~G4LEPTSElasticModel() = default;
39
40
41 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
42 void G4LEPTSElasticModel::Initialise(const G4ParticleDefinition* aParticle,
43 const G4DataVector&)
44 {
45 Init();
46 BuildPhysicsTable( *aParticle );
47
48 fParticleChangeForGamma = GetParticleChangeForGamma();
49
50 // static const G4double proton_mass_c2 = 938.272013 * MeV;
51 // static const G4double neutron_mass_c2 = 939.56536 * MeV;
52 // static const G4double h2o_mass_c2 = 8*neutron_mass_c2 + 10*(proton_mass_c2 + electron_mass_c2);
53 // G4cout << "mme " << h2o_mass_c2/MeV << " " << H2o_mass_c2/MeV << G4endl;
54
55 const G4MaterialTable * materialTable = G4Material::GetMaterialTable() ;
56 std::vector<G4Material*>::const_iterator matite;
57 for( matite = materialTable->begin(); matite != materialTable->end(); matite++ ) {
58 const G4Material * aMaterial = (*matite);
59 theMassTarget[aMaterial] = theMolecularMass[aMaterial] / (6.02214179e+23/CLHEP::mole) *CLHEP::c_light * CLHEP::c_light;
60 theMassProjectile[aMaterial] = CLHEP::electron_mass_c2;
61
62 if( verboseLevel >= 1) G4cout << "Material: " << aMaterial->GetName() << " MolecularMass: " << theMolecularMass[aMaterial]/(CLHEP::g/CLHEP::mole) << " g/mole "
63 << " MTarget: " << theMassTarget[aMaterial]/CLHEP::MeV << " MeV" << G4endl;
64 }
65
66
67 }
68
69 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
70 G4double G4LEPTSElasticModel::CrossSectionPerVolume(const G4Material* mate,
71 const G4ParticleDefinition* aParticle,
72 G4double kineticEnergy,
73 G4double,
74 G4double)
75 {
76 if( kineticEnergy < theLowestEnergyLimit ) return DBL_MAX;
77 return 1./GetMeanFreePath( mate, aParticle, kineticEnergy );
78
79 }
80
81
82 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
83 void G4LEPTSElasticModel::SampleSecondaries(std::vector<G4DynamicParticle*>*,
84 const G4MaterialCutsCouple* mateCuts,
85 const G4DynamicParticle* aDynamicParticle,
86 G4double,
87 G4double)
88 {
89 G4double P0KinEn = aDynamicParticle->GetKineticEnergy();
90 G4ThreeVector P0Dir = aDynamicParticle->GetMomentumDirection();
91
92 if( P0KinEn < theLowestEnergyLimit ) {
93 fParticleChangeForGamma->ProposeMomentumDirection( P0Dir );
94 fParticleChangeForGamma->SetProposedKineticEnergy( 0.);
95 fParticleChangeForGamma->ProposeLocalEnergyDeposit( P0KinEn);
96 fParticleChangeForGamma->ProposeTrackStatus(fStopAndKill);
97 if( verboseLevel > 2 ) G4cout << " ENERGY LOW " << P0KinEn - theLowestEnergyLimit << G4endl;
98 return;
99 }
100
101 //- G4ParticleDefinition * particleDefDef = aTrack.GetDefinition();
102 //- G4String partName = particleDefDef->GetParticleName();
103
104 // G4ThreeVector pos, pos0, dpos;
105
106 //- G4StepPoG4int * PostPoG4int = aStep.GetPostStepPoG4int();
107 //- G4ThreeVector r = PostPoG4int->GetPosition();
108
109 //TypeOfInteraction=-10;
110
111 const G4Material* aMaterial = mateCuts->GetMaterial();
112 G4double ang = SampleAngle(aMaterial, P0KinEn/CLHEP::eV, 0.0);
113 G4ThreeVector P1Dir = SampleNewDirection(P0Dir, ang);
114 #ifdef DEBUG_LEPTS
115 if( verboseLevel >= 2 ) G4cout << " G4LEPTSElasticModel::SampleSecondaries( P1Dir " << P1Dir << " P0Dir " << P0Dir << " ang " << ang << G4endl;
116 #endif
117
118 //G4ThreeVector P1Dir = SampleNewDirection(P0Dir, P0KinEn/eV, 0.0);
119 //G4double Energylost1= ElasticEnergyTransferWater2(P0KinEn, ang);
120 G4double Energylost = EnergyTransfer(P0KinEn, ang, theMassTarget[aMaterial], theMassProjectile[aMaterial]);
121 if( verboseLevel >= 3 ) G4cout << " ELASTIC Energylost "<< Energylost << " = " << P0KinEn << " " <<ang << " " << theMassTarget[aMaterial] << " " << theMassProjectile[aMaterial] << G4endl;
122
123 G4double P1KinEn = P0KinEn - Energylost;
124 if( verboseLevel >= 3 ) G4cout << " ELASTIC " << P1KinEn << " = " << P0KinEn << " - " << Energylost << G4endl;
125 #ifdef DEBUG_LEPTS
126 if( verboseLevel >= 2 ) G4cout << " G4LEPTSElasticModel::SampleSecondaries( SetProposedKineticEnergy " << P1KinEn << " " << P0KinEn << " - " << Energylost << G4endl;
127 #endif
128 fParticleChangeForGamma->ProposeMomentumDirection( P1Dir );
129 fParticleChangeForGamma->SetProposedKineticEnergy( P1KinEn);
130 fParticleChangeForGamma->ProposeLocalEnergyDeposit( Energylost);
131 //G4cout << "elasticEnergyLost: " << Energylost << G4endl;
132
133 #ifdef DEBUG_LEPTS
134 if( verboseLevel >= 2 ) G4cout << " G4LEPTSElasticModel::SampleSecondaries( ProposeMomentumDirection " << fParticleChangeForGamma->GetProposedMomentumDirection() << G4endl;
135 #endif
136 }
137
138 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
139 G4double G4LEPTSElasticModel::EnergyTransfer(G4double E, G4double ang, G4double MT, G4double MP)
140 {
141 G4double co = std::cos(ang);
142 G4double si = std::sin(ang);
143
144 G4double W = ( (E+MP)*si*si + MT - co*std::sqrt(MT*MT-MP*MP*si*si) ) * E*(E+2*MP)
145 / ( std::pow((E+MP+MT),2) - E*co*co*(E+2*MP) );
146
147 //G4double W2 = 2*MP/MT*(1-co)*E;
148 //G4cout << "WWWWWWWWW: " << W/E << " " << E/W << " " << W2/W << G4endl;
149 //G4cout << "Mm " << MT/MeV << " " << MP/MeV << G4endl;
150
151 return W;
152 }
153
154