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G4hhIonisation.cc
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26 // $Id: G4hhIonisation.cc 66996 2013-01-29 14:50:52Z gcosmo $
27 //
28 // -------------------------------------------------------------------
29 //
30 // GEANT4 Class file
31 //
32 //
33 // File name: G4hhIonisation
34 //
35 // Author: Vladimir Ivanchenko
36 //
37 // Creation date: 30.09.2005
38 //
39 // Modifications:
40 // 10-01-06 SetStepLimits -> SetStepFunction (V.Ivantchenko)
41 // 27-10-06 Add maxKinEnergy (V.Ivantchenko)
42 //
43 //
44 // -------------------------------------------------------------------
45 //
46 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
47 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
48 
49 #include "G4hhIonisation.hh"
50 #include "G4PhysicalConstants.hh"
51 #include "G4SystemOfUnits.hh"
52 #include "G4BraggNoDeltaModel.hh"
54 #include "G4ICRU73NoDeltaModel.hh"
56 #include "G4BohrFluctuations.hh"
57 #include "G4IonFluctuations.hh"
58 #include "G4UnitsTable.hh"
59 #include "G4Electron.hh"
60 #include "G4LossTableManager.hh"
61 
62 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
63 
65  : G4VEnergyLossProcess(name),
66  theParticle(0),
67  theBaseParticle(0),
68  isInitialised(false)
69 {
70  SetStepFunction(0.1, 0.1*mm);
71  SetVerboseLevel(1);
73  mass = 0.0;
74  ratio = 0.0;
75  flucModel = 0;
76 }
77 
78 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
79 
81 {}
82 
83 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
84 
86 {
87  return (p.GetPDGCharge() != 0.0 && p.GetPDGMass() > 100.0*MeV &&
88  !p.IsShortLived());
89 }
90 
91 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
92 
94  const G4Material*,
95  G4double cut)
96 {
97  G4double x = 0.5*cut/electron_mass_c2;
99  G4double gam = x*y + std::sqrt((1. + x)*(1. + x*y*y));
100  return mass*(gam - 1.0);
101 }
102 
103 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
104 
106  const G4ParticleDefinition* bpart)
107 {
108  if(isInitialised) { return; }
109 
110  theParticle = part;
111  if(bpart) {
112  G4cout << "G4hhIonisation::InitialiseEnergyLossProcess WARNING: no "
113  << "base particle should be defined for the process "
114  << GetProcessName() << G4endl;
115  }
116  SetBaseParticle(0);
118  mass = theParticle->GetPDGMass();
119  ratio = electron_mass_c2/mass;
120  G4double eth = 2*MeV*mass/proton_mass_c2;
121  flucModel = new G4IonFluctuations();
122 
123  G4double emin = std::min(MinKinEnergy(), 0.1*eth);
124  G4double emax = std::max(MaxKinEnergy(), 100*eth);
125 
126  SetMinKinEnergy(emin);
127  SetMaxKinEnergy(emax);
128  G4int bin = G4lrint(G4LossTableManager::Instance()->GetNumberOfBinsPerDecade()
129  *std::log10(emax/emin));
130  SetDEDXBinning(bin);
131 
132  G4VEmModel* em = 0;
133  if(part->GetPDGCharge() > 0.0) { em = new G4BraggNoDeltaModel(); }
134  else { em = new G4ICRU73NoDeltaModel(); }
135  em->SetLowEnergyLimit(emin);
136  em->SetHighEnergyLimit(eth);
137  AddEmModel(1, em, flucModel);
138 
139  em = new G4BetheBlochNoDeltaModel();
140  em->SetLowEnergyLimit(eth);
141  em->SetHighEnergyLimit(emax);
142  AddEmModel(1, em, flucModel);
143 
144  if(verboseLevel>1) {
145  G4cout << "G4hhIonisation is initialised" << G4endl;
146  }
147  isInitialised = true;
148 }
149 
150 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
151 
153 {
154  G4cout << " Delta-ray will not be produced; "
155  << G4endl;
156 }
157 
158 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....