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25 // 22 //
26 // 23 //
27 // ------------------------------------------- 24 // -------------------------------------------------------------------
28 // 25 //
29 // GEANT4 Class file 26 // GEANT4 Class file
30 // 27 //
31 // 28 //
32 // File name: G4IonYangFluctuationModel 29 // File name: G4IonYangFluctuationModel
33 // 30 //
34 // Author: V.Ivanchenko (Vladimir.Ivanc 31 // Author: V.Ivanchenko (Vladimir.Ivanchenko@cern.ch)
35 // << 32 //
36 // Creation date: 18 August 2000 33 // Creation date: 18 August 2000
37 // 34 //
38 // Modifications: << 35 // Modifications:
39 // 18/08/2000 V.Ivanchenko First implementati 36 // 18/08/2000 V.Ivanchenko First implementation
40 // 04/09/2000 V.Ivanchenko Rename fluctuation << 37 // 04/09/2000 V.Ivanchenko Rename fluctuations
41 // 03/10/2000 V.Ivanchenko CodeWizard clean u 38 // 03/10/2000 V.Ivanchenko CodeWizard clean up
42 // 10/05/2001 V.Ivanchenko Clean up againist 39 // 10/05/2001 V.Ivanchenko Clean up againist Linux compilation with -Wall
43 // 40 //
44 // ------------------------------------------- 41 // -------------------------------------------------------------------
45 // Class Description: << 42 // Class Description:
46 // 43 //
47 // The aproximation of additional ion energy l << 44 // The aproximation of additional ion energy loss fluctuations
48 // Q.Yang et al., NIM B61(1991)149-155. 45 // Q.Yang et al., NIM B61(1991)149-155.
49 // 46 //
50 // Class Description: End << 47 // Class Description: End
51 // 48 //
52 // ------------------------------------------- 49 // -------------------------------------------------------------------
53 // 50 //
54 //....oooOO0OOooo........oooOO0OOooo........oo 51 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
55 52
56 #include "G4IonYangFluctuationModel.hh" 53 #include "G4IonYangFluctuationModel.hh"
57 <<
58 #include "globals.hh" <<
59 #include "G4PhysicalConstants.hh" <<
60 #include "G4SystemOfUnits.hh" <<
61 #include "G4DynamicParticle.hh" 54 #include "G4DynamicParticle.hh"
62 #include "G4ParticleDefinition.hh" 55 #include "G4ParticleDefinition.hh"
63 #include "G4Material.hh" 56 #include "G4Material.hh"
64 #include "G4Exp.hh" << 57 #include "globals.hh"
65 58
66 //....oooOO0OOooo........oooOO0OOooo........oo 59 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
67 60
68 G4IonYangFluctuationModel::G4IonYangFluctuatio 61 G4IonYangFluctuationModel::G4IonYangFluctuationModel(const G4String& name)
69 : G4VLowEnergyModel(name) 62 : G4VLowEnergyModel(name)
70 {;} 63 {;}
71 64
72 //....oooOO0OOooo........oooOO0OOooo........oo 65 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
73 66
74 G4IonYangFluctuationModel::~G4IonYangFluctuati << 67 G4IonYangFluctuationModel::~G4IonYangFluctuationModel()
75 {;} 68 {;}
76 69
77 //....oooOO0OOooo........oooOO0OOooo........oo 70 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
78 71
79 G4double G4IonYangFluctuationModel::TheValue(c 72 G4double G4IonYangFluctuationModel::TheValue(const G4DynamicParticle* particle,
80 const G4Material* material) << 73 const G4Material* material)
81 { 74 {
82 G4double energy = particle->GetKineticEnergy 75 G4double energy = particle->GetKineticEnergy() ;
83 G4double mass = particle->GetMass() ; 76 G4double mass = particle->GetMass() ;
84 G4double charge = (particle->GetCharge())/ep 77 G4double charge = (particle->GetCharge())/eplus ;
85 78
86 G4double q = YangFluctuationModel(material,e 79 G4double q = YangFluctuationModel(material,energy,mass,charge) ;
87 80
88 return q ; 81 return q ;
89 } 82 }
90 83
91 //....oooOO0OOooo........oooOO0OOooo........oo 84 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
92 85
93 G4double G4IonYangFluctuationModel::TheValue(c 86 G4double G4IonYangFluctuationModel::TheValue(const G4ParticleDefinition* aParticle,
94 const G4Material* material, 87 const G4Material* material,
95 G4double kineticEnergy) << 88 G4double kineticEnergy)
96 { 89 {
97 G4double mass = aParticle->GetPDGMass() ; 90 G4double mass = aParticle->GetPDGMass() ;
98 G4double charge = (aParticle->GetPDGCharge() 91 G4double charge = (aParticle->GetPDGCharge())/eplus ;
99 92
100 G4double q = YangFluctuationModel(material,k 93 G4double q = YangFluctuationModel(material,kineticEnergy,mass,charge);
101 94
102 return q ; 95 return q ;
103 } 96 }
104 97
105 //....oooOO0OOooo........oooOO0OOooo........oo 98 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
106 99
107 G4double G4IonYangFluctuationModel::HighEnergy 100 G4double G4IonYangFluctuationModel::HighEnergyLimit(const G4ParticleDefinition*,
108 const G4Material*) const 101 const G4Material*) const
109 { 102 {
110 return 1.0*TeV ; 103 return 1.0*TeV ;
111 } 104 }
112 105
113 //....oooOO0OOooo........oooOO0OOooo........oo 106 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
114 107
115 G4double G4IonYangFluctuationModel::LowEnergyL 108 G4double G4IonYangFluctuationModel::LowEnergyLimit(const G4ParticleDefinition* ,
116 const G4Material* ) const 109 const G4Material* ) const
117 { 110 {
118 return 0.0 ; 111 return 0.0 ;
119 } 112 }
120 113
121 //....oooOO0OOooo........oooOO0OOooo........oo 114 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
122 115
123 G4double G4IonYangFluctuationModel::HighEnergy 116 G4double G4IonYangFluctuationModel::HighEnergyLimit(const G4ParticleDefinition* ) const
124 { 117 {
125 return 1.0*TeV ; 118 return 1.0*TeV ;
126 } 119 }
127 120
128 //....oooOO0OOooo........oooOO0OOooo........oo 121 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
129 122
130 G4double G4IonYangFluctuationModel::LowEnergyL 123 G4double G4IonYangFluctuationModel::LowEnergyLimit(
131 const G4Particle 124 const G4ParticleDefinition* ) const
132 { 125 {
133 return 0.0 ; 126 return 0.0 ;
134 } 127 }
135 128
136 //....oooOO0OOooo........oooOO0OOooo........oo 129 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
137 << 130
138 G4bool G4IonYangFluctuationModel::IsInCharge(c 131 G4bool G4IonYangFluctuationModel::IsInCharge(const G4DynamicParticle*,
139 const G4Material* ) const 132 const G4Material* ) const
140 { 133 {
141 return true ; 134 return true ;
142 } 135 }
143 136
144 //....oooOO0OOooo........oooOO0OOooo........oo 137 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
145 << 138
146 G4bool G4IonYangFluctuationModel::IsInCharge(c 139 G4bool G4IonYangFluctuationModel::IsInCharge(const G4ParticleDefinition* ,
147 const G4Material* ) const 140 const G4Material* ) const
148 { 141 {
149 return true ; 142 return true ;
150 } 143 }
151 144
152 //....oooOO0OOooo........oooOO0OOooo........oo 145 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
153 146
154 G4double G4IonYangFluctuationModel::YangFluctu 147 G4double G4IonYangFluctuationModel::YangFluctuationModel(const G4Material* material,
155 G4double kineticEnergy, 148 G4double kineticEnergy,
156 G4double particleMass, 149 G4double particleMass,
157 G4double charge) const 150 G4double charge) const
158 { 151 {
159 // The aproximation of energy loss fluctuati << 152 // The aproximation of energy loss fluctuations
160 // Q.Yang et al., NIM B61(1991)149-155. 153 // Q.Yang et al., NIM B61(1991)149-155.
161 154
162 // Reduced energy in MeV/AMU 155 // Reduced energy in MeV/AMU
163 G4double energy = kineticEnergy *amu_c2/(par 156 G4double energy = kineticEnergy *amu_c2/(particleMass*MeV) ;
164 157
165 G4int i = 0 ; 158 G4int i = 0 ;
166 G4double factor = 1.0 ; 159 G4double factor = 1.0 ;
167 160
168 // The index of set of parameters i = 0 for 161 // The index of set of parameters i = 0 for protons(hadrons) in gases
169 // 1 for 162 // 1 for protons(hadrons) in solids
170 // 2 for 163 // 2 for ions in atomic gases
171 // 3 for 164 // 3 for ions in molecular gases
172 // 4 for 165 // 4 for ions in solids
173 static const G4double b[5][4] = { << 166 static G4double b[5][4] = {
174 {0.1014, 0.3700, 0.9642, 3.987}, 167 {0.1014, 0.3700, 0.9642, 3.987},
175 {0.1955, 0.6941, 2.522, 1.040}, 168 {0.1955, 0.6941, 2.522, 1.040},
176 {0.05058, 0.08975, 0.1419, 10.80}, 169 {0.05058, 0.08975, 0.1419, 10.80},
177 {0.05009, 0.08660, 0.2751, 3.787}, 170 {0.05009, 0.08660, 0.2751, 3.787},
178 {0.01273, 0.03458, 0.3951, 3.812} 171 {0.01273, 0.03458, 0.3951, 3.812}
179 } ; 172 } ;
180 173
181 // protons (hadrons) << 174 // protons (hadrons)
182 if(1.5 > charge) { 175 if(1.5 > charge) {
183 if( kStateGas != material->GetState() ) i 176 if( kStateGas != material->GetState() ) i = 1 ;
184 177
185 // ions 178 // ions
186 } else { 179 } else {
187 G4double zeff = (material->GetElectronDens 180 G4double zeff = (material->GetElectronDensity())/
188 (material->GetTotNbOfAtoms 181 (material->GetTotNbOfAtomsPerVolume()) ;
189 factor = charge * std::pow(charge/zeff, 0. << 182 factor = charge * pow(charge/zeff, 0.3333) ;
190 183
191 if( kStateGas == material->GetState() ) { 184 if( kStateGas == material->GetState() ) {
192 energy /= (charge * std::sqrt(charge)) ; << 185 energy /= (charge * sqrt(charge)) ;
193 186
194 if(1 == (material->GetNumberOfElements() 187 if(1 == (material->GetNumberOfElements())) {
195 i = 2 ; 188 i = 2 ;
196 } else { 189 } else {
197 i = 3 ; 190 i = 3 ;
198 } 191 }
199 192
200 } else { 193 } else {
201 energy /= (charge * std::sqrt(charge*zef << 194 energy /= (charge * sqrt(charge*zeff)) ;
202 i = 4 ; 195 i = 4 ;
203 } 196 }
204 } 197 }
205 198
206 G4double x = b[i][2] * (1.0 - G4Exp( - energ << 199 G4double x = b[i][2] * (1.0 - exp( - energy * b[i][3] )) ;
207 200
208 G4double q = factor * x * b[i][0] / << 201 G4double q = factor * x * b[i][0] /
209 ((energy - b[i][1])*(energy - b[i 202 ((energy - b[i][1])*(energy - b[i][1]) + x*x) ;
210 203
211 return q ; << 204 return q ;
212 } 205 }
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213 212