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25 //
26 //
27 // -------------------------------------------------------------------
28 //
29 // GEANT4 Class file
30 //
31 //
32 // File name: G4hhIonisation
33 //
34 // Author: Vladimir Ivanchenko
35 //
36 // Creation date: 30.09.2005
37 //
38 // Modifications:
39 // 10-01-06 SetStepLimits -> SetStepFunction (V.Ivantchenko)
40 // 27-10-06 Add maxKinEnergy (V.Ivantchenko)
41 //
42 //
43 // -------------------------------------------------------------------
44 //
45 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
46 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
47
48 #include "G4hhIonisation.hh"
49 #include "G4PhysicalConstants.hh"
50 #include "G4SystemOfUnits.hh"
51 #include "G4BraggNoDeltaModel.hh"
52 #include "G4BetheBlochNoDeltaModel.hh"
53 #include "G4ICRU73NoDeltaModel.hh"
54 #include "G4UniversalFluctuation.hh"
55 #include "G4IonFluctuations.hh"
56 #include "G4UnitsTable.hh"
57 #include "G4Electron.hh"
58 #include "G4EmParameters.hh"
59
60 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
61
62 G4hhIonisation::G4hhIonisation(const G4String& name)
63 : G4VEnergyLossProcess(name)
64 {
65 SetVerboseLevel(1);
66 SetProcessSubType(fIonisation);
67 SetSecondaryParticle(G4Electron::Electron());
68 }
69
70 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
71
72 G4hhIonisation::~G4hhIonisation()
73 {}
74
75 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
76
77 G4bool G4hhIonisation::IsApplicable(const G4ParticleDefinition& p)
78 {
79 return (p.GetPDGCharge() != 0.0);
80 }
81
82 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
83
84 G4double G4hhIonisation::MinPrimaryEnergy(const G4ParticleDefinition*,
85 const G4Material*,
86 G4double cut)
87 {
88 G4double x = 0.5*cut/electron_mass_c2;
89 G4double y = electron_mass_c2/mass;
90 G4double gam = x*y + std::sqrt((1. + x)*(1. + x*y*y));
91 return mass*(gam - 1.0);
92 }
93
94 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
95
96 void G4hhIonisation::InitialiseEnergyLossProcess(
97 const G4ParticleDefinition* part,
98 const G4ParticleDefinition* bpart)
99 {
100 if(isInitialised) { return; }
101
102 theParticle = part;
103 if(nullptr != bpart) {
104 G4cout << "G4hhIonisation::InitialiseEnergyLossProcess WARNING: no "
105 << "base particle should be defined for the process "
106 << GetProcessName() << G4endl;
107 }
108 mass = theParticle->GetPDGMass();
109 ratio = electron_mass_c2/mass;
110 G4double eth = 2*CLHEP::MeV*mass/proton_mass_c2;
111 flucModel = new G4IonFluctuations();
112
113 G4EmParameters* param = G4EmParameters::Instance();
114 G4double emin = std::min(param->MinKinEnergy(), 0.1*eth);
115 G4double emax = std::max(param->MaxKinEnergy(), 100*eth);
116
117 SetMinKinEnergy(emin);
118 SetMaxKinEnergy(emax);
119 G4int bin = G4lrint(param->NumberOfBinsPerDecade()*std::log10(emax/emin));
120 SetDEDXBinning(bin);
121
122 G4VEmModel* em = EmModel(0);
123 if (nullptr == em) {
124 if(part->GetPDGCharge() > 0.0) { em = new G4BraggNoDeltaModel(); }
125 else { em = new G4ICRU73NoDeltaModel(); }
126 }
127 em->SetLowEnergyLimit(emin);
128 em->SetHighEnergyLimit(eth);
129 AddEmModel(1, em, flucModel);
130
131 em = EmModel(1);
132 if(nullptr == em) { em = new G4BetheBlochNoDeltaModel(); }
133 em->SetLowEnergyLimit(eth);
134 em->SetHighEnergyLimit(emax);
135 AddEmModel(1, em, flucModel);
136
137 if(verboseLevel>1) {
138 G4cout << "G4hhIonisation is initialised" << G4endl;
139 }
140 isInitialised = true;
141 }
142
143 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
144
145 void G4hhIonisation::ProcessDescription(std::ostream& out) const
146 {
147 out << "G4hhIonisation: no delta rays" << G4endl;
148 G4VEnergyLossProcess::ProcessDescription(out);
149 }
150
151 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
152