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Geant4/processes/electromagnetic/standard/src/G4hIonisation.cc

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Diff markup

Differences between /processes/electromagnetic/standard/src/G4hIonisation.cc (Version 11.3.0) and /processes/electromagnetic/standard/src/G4hIonisation.cc (Version 11.0.p3,)


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  1 //                                                  1 
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 19 // * technical work of the GEANT4 collaboratio    
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 24 // *******************************************    
 25 //                                                
 26 // -------------------------------------------    
 27 //                                                
 28 // GEANT4 Class file                              
 29 //                                                
 30 //                                                
 31 // File name:     G4hIonisation                   
 32 //                                                
 33 // Author:        Laszlo Urban                    
 34 //                                                
 35 // Creation date: 30.05.1997                      
 36 //                                                
 37 // Modified by Laszlo Urban, Michel Maire and     
 38 //                                                
 39 // -------------------------------------------    
 40 //                                                
 41 //....oooOO0OOooo........oooOO0OOooo........oo    
 42 //....oooOO0OOooo........oooOO0OOooo........oo    
 43                                                   
 44 #include "G4hIonisation.hh"                       
 45 #include "G4PhysicalConstants.hh"                 
 46 #include "G4SystemOfUnits.hh"                     
 47 #include "G4Electron.hh"                          
 48 #include "G4Proton.hh"                            
 49 #include "G4AntiProton.hh"                        
 50 #include "G4BraggModel.hh"                        
 51 #include "G4BetheBlochModel.hh"                   
 52 #include "G4EmStandUtil.hh"                       
 53 #include "G4PionPlus.hh"                          
 54 #include "G4PionMinus.hh"                         
 55 #include "G4KaonPlus.hh"                          
 56 #include "G4KaonMinus.hh"                         
 57 #include "G4ICRU73QOModel.hh"                     
 58 #include "G4EmParameters.hh"                      
 59                                                   
 60 //....oooOO0OOooo........oooOO0OOooo........oo    
 61                                                   
 62 G4hIonisation::G4hIonisation(const G4String& n    
 63   : G4VEnergyLossProcess(name)                    
 64 {                                                 
 65   SetProcessSubType(fIonisation);                 
 66   SetSecondaryParticle(G4Electron::Electron())    
 67   eth = 2*CLHEP::MeV;                             
 68 }                                                 
 69                                                   
 70 //....oooOO0OOooo........oooOO0OOooo........oo    
 71                                                   
 72 G4bool G4hIonisation::IsApplicable(const G4Par    
 73 {                                                 
 74   return true;                                    
 75 }                                                 
 76                                                   
 77 //....oooOO0OOooo........oooOO0OOooo........oo    
 78                                                   
 79 G4double G4hIonisation::MinPrimaryEnergy(const    
 80            const G4Material*,                     
 81            G4double cut)                          
 82 {                                                 
 83   G4double x = 0.5*cut/electron_mass_c2;          
 84   G4double gam = x*ratio + std::sqrt((1. + x)*    
 85   return mass*(gam - 1.0);                        
 86 }                                                 
 87                                                   
 88 //....oooOO0OOooo........oooOO0OOooo........oo    
 89                                                   
 90 void G4hIonisation::InitialiseEnergyLossProces    
 91         const G4ParticleDefinition* part,         
 92         const G4ParticleDefinition* bpart)        
 93 {                                                 
 94   if(!isInitialised) {                            
 95                                                   
 96     const G4ParticleDefinition* theBaseParticl    
 97     G4String pname = part->GetParticleName();     
 98     G4double q = part->GetPDGCharge();            
 99                                                   
100     //G4cout << " G4hIonisation::InitialiseEne    
101     //   << "  " << bpart << G4endl;              
102                                                   
103     // define base particle                       
104     if(part == bpart) {                           
105       theBaseParticle = nullptr;                  
106     } else if(nullptr != bpart) {                 
107       theBaseParticle = bpart;                    
108                                                   
109     } else if(pname == "proton" || pname == "a    
110         pname == "pi+" || pname == "pi-" ||       
111         pname == "kaon+" || pname == "kaon-" |    
112         pname == "GenericIon" || pname == "alp    
113       // no base particles                        
114       theBaseParticle = nullptr;                  
115                                                   
116     } else {                                      
117       // select base particle                     
118       if(part->GetPDGSpin() == 0.0) {             
119   if(q > 0.0) { theBaseParticle = G4KaonPlus::    
120   else { theBaseParticle = G4KaonMinus::KaonMi    
121       } else {                                    
122   if(q > 0.0) { theBaseParticle = G4Proton::Pr    
123   else { theBaseParticle = G4AntiProton::AntiP    
124       }                                           
125     }                                             
126     SetBaseParticle(theBaseParticle);             
127                                                   
128     // model limit defined for protons            
129     mass  = part->GetPDGMass();                   
130     ratio = electron_mass_c2/mass;                
131     eth   = 2.0*MeV*mass/proton_mass_c2;          
132                                                   
133     G4EmParameters* param = G4EmParameters::In    
134     G4double emin = param->MinKinEnergy();        
135     G4double emax = param->MaxKinEnergy();        
136                                                   
137     // define model of energy loss fluctuation    
138     if (nullptr == FluctModel()) {                
139       G4bool ion = (pname == "GenericIon" || p    
140       SetFluctModel(G4EmStandUtil::ModelOfFluc    
141     }                                             
142                                                   
143     if (nullptr == EmModel(0)) {                  
144       if(q > 0.0) { SetEmModel(new G4BraggMode    
145       else        { SetEmModel(new G4ICRU73QOM    
146     }                                             
147     // to compute ranges correctly we have to     
148     // model even if activation limit is high     
149     EmModel(0)->SetLowEnergyLimit(emin);          
150                                                   
151     // high energy limit may be eth or DBL_MAX    
152     G4double emax1 = (EmModel(0)->HighEnergyLi    
153     EmModel(0)->SetHighEnergyLimit(emax1);        
154     AddEmModel(1, EmModel(0), FluctModel());      
155                                                   
156     // second model is used if the first does     
157     if(emax1 < emax) {                            
158       if (nullptr == EmModel(1)) { SetEmModel(    
159       EmModel(1)->SetLowEnergyLimit(emax1);       
160                                                   
161       // for extremely heavy particles upper l    
162       // should be increased                      
163       emax = std::max(emax, eth*10);              
164       EmModel(1)->SetHighEnergyLimit(emax);       
165       AddEmModel(2, EmModel(1), FluctModel());    
166     }                                             
167     isInitialised = true;                         
168   }                                               
169 }                                                 
170                                                   
171 //....oooOO0OOooo........oooOO0OOooo........oo    
172                                                   
173 void G4hIonisation::ProcessDescription(std::os    
174 {                                                 
175   out << "  Hadron ionisation";                   
176   G4VEnergyLossProcess::ProcessDescription(out    
177 }                                                 
178                                                   
179 //....oooOO0OOooo........oooOO0OOooo........oo    
180