| Geant4 Cross Reference |
1 // 1 //
2 // ******************************************* 2 // ********************************************************************
3 // * License and Disclaimer 3 // * License and Disclaimer *
4 // * 4 // * *
5 // * The Geant4 software is copyright of th 5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided 6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License 7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/ 8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. 9 // * include a list of copyright holders. *
10 // * 10 // * *
11 // * Neither the authors of this software syst 11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing fin 12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warran 13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assum 14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file 15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. *
17 // * 17 // * *
18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. *
24 // ******************************************* 24 // ********************************************************************
25 // 25 //
26 // 26 //
27 // ------------------------------------------- 27 // -------------------------------------------------------------------
28 // 28 //
29 // GEANT4 Class header file 29 // GEANT4 Class header file
30 // 30 //
31 // 31 //
32 // File name: G4MuPairProductionModel 32 // File name: G4MuPairProductionModel
33 // 33 //
34 // Author: Vladimir Ivanchenko on base 34 // Author: Vladimir Ivanchenko on base of Laszlo Urban code
35 // 35 //
36 // Creation date: 18.05.2002 36 // Creation date: 18.05.2002
37 // 37 //
38 // Modifications: 38 // Modifications:
39 // 39 //
40 // 23-12-02 Change interface in order to move 40 // 23-12-02 Change interface in order to move to cut per region (V.Ivanchenko)
41 // 27-01-03 Make models region aware (V.Ivanch 41 // 27-01-03 Make models region aware (V.Ivanchenko)
42 // 13-02-03 Add name (V.Ivanchenko) 42 // 13-02-03 Add name (V.Ivanchenko)
43 // 10-02-04 Update parameterisation using R.Ko 43 // 10-02-04 Update parameterisation using R.Kokoulin model (V.Ivanchenko)
44 // 10-02-04 Add lowestKinEnergy (V.Ivanchenko) 44 // 10-02-04 Add lowestKinEnergy (V.Ivanchenko)
45 // 13-02-06 Add ComputeCrossSectionPerAtom (mm 45 // 13-02-06 Add ComputeCrossSectionPerAtom (mma)
46 // 12-05-06 Add parameter to SelectRandomAtom 46 // 12-05-06 Add parameter to SelectRandomAtom (A.Bogdanov)
47 // 11-10-07 Add ignoreCut flag (V.Ivanchenko) 47 // 11-10-07 Add ignoreCut flag (V.Ivanchenko)
48 // 28-02-08 Reorganized protected methods and 48 // 28-02-08 Reorganized protected methods and members (V.Ivanchenko)
49 // 49 //
50 // Class Description: 50 // Class Description:
51 // 51 //
52 // Implementation of e+e- pair production by m 52 // Implementation of e+e- pair production by muons
53 // A.G. Bogdanov et al., IEEE Trans. Nuc. Sci. 53 // A.G. Bogdanov et al., IEEE Trans. Nuc. Sci., Vol.53, No.2, 2006
54 // Base class for all pair production models f <<
55 // 54 //
56 // ------------------------------------------- 55 // -------------------------------------------------------------------
57 // 56 //
58 57
59 #ifndef G4MuPairProductionModel_h 58 #ifndef G4MuPairProductionModel_h
60 #define G4MuPairProductionModel_h 1 59 #define G4MuPairProductionModel_h 1
61 60
62 #include "G4VEmModel.hh" 61 #include "G4VEmModel.hh"
63 #include "G4NistManager.hh" 62 #include "G4NistManager.hh"
64 #include "G4ElementData.hh" 63 #include "G4ElementData.hh"
65 #include "G4Physics2DVector.hh" 64 #include "G4Physics2DVector.hh"
66 #include <vector> 65 #include <vector>
67 66
68 class G4Element; 67 class G4Element;
69 class G4ParticleChangeForLoss; 68 class G4ParticleChangeForLoss;
70 class G4ParticleChangeForGamma; 69 class G4ParticleChangeForGamma;
71 70
72 class G4MuPairProductionModel : public G4VEmMo 71 class G4MuPairProductionModel : public G4VEmModel
73 { 72 {
74 public: 73 public:
75 74
76 explicit G4MuPairProductionModel(const G4Par 75 explicit G4MuPairProductionModel(const G4ParticleDefinition* p = nullptr,
77 const G4Str 76 const G4String& nam = "muPairProd");
78 77
79 ~G4MuPairProductionModel() override = defaul << 78 virtual ~G4MuPairProductionModel() override;
80 79
81 void Initialise(const G4ParticleDefinition*, 80 void Initialise(const G4ParticleDefinition*, const G4DataVector&) override;
82 81
83 void InitialiseLocal(const G4ParticleDefinit 82 void InitialiseLocal(const G4ParticleDefinition*,
84 G4VEmModel* masterModel 83 G4VEmModel* masterModel) override;
85 84
86 G4double ComputeCrossSectionPerAtom(const G4 85 G4double ComputeCrossSectionPerAtom(const G4ParticleDefinition*,
87 G4double kineticEnergy, 86 G4double kineticEnergy,
88 G4double Z, G4double A, 87 G4double Z, G4double A,
89 G4double cutEnergy, 88 G4double cutEnergy,
90 G4double maxEnergy) override; 89 G4double maxEnergy) override;
91 90
92 G4double ComputeDEDXPerVolume(const G4Materi 91 G4double ComputeDEDXPerVolume(const G4Material*,
93 const G4Partic 92 const G4ParticleDefinition*,
94 G4double kinet 93 G4double kineticEnergy,
95 G4double cutEn 94 G4double cutEnergy) override;
96 95
97 void SampleSecondaries(std::vector<G4Dynamic 96 void SampleSecondaries(std::vector<G4DynamicParticle*>*,
98 const G4MaterialCutsCouple*, 97 const G4MaterialCutsCouple*,
99 const G4DynamicParticle*, 98 const G4DynamicParticle*,
100 G4double tmin, 99 G4double tmin,
101 G4double maxEnergy) override; 100 G4double maxEnergy) override;
102 101
103 G4double MinPrimaryEnergy(const G4Material*, 102 G4double MinPrimaryEnergy(const G4Material*,
104 const G4ParticleDe 103 const G4ParticleDefinition*,
105 G4double) override 104 G4double) override;
106 105
107 virtual G4double <<
108 ComputeDMicroscopicCrossSection(G4double tki <<
109 G4double pairEnergy); <<
110 <<
111 inline void SetLowestKineticEnergy(G4double 106 inline void SetLowestKineticEnergy(G4double e);
112 107
113 inline void SetParticle(const G4ParticleDefi 108 inline void SetParticle(const G4ParticleDefinition*);
114 109
115 // hide assignment operator and copy constru 110 // hide assignment operator and copy constructor
116 G4MuPairProductionModel & operator= 111 G4MuPairProductionModel & operator=
117 (const G4MuPairProductionModel &right) = del 112 (const G4MuPairProductionModel &right) = delete;
118 G4MuPairProductionModel(const G4MuPairProdu 113 G4MuPairProductionModel(const G4MuPairProductionModel&) = delete;
119 114
120 protected: 115 protected:
121 116
122 G4double ComputMuPairLoss(G4double Z, G4doub 117 G4double ComputMuPairLoss(G4double Z, G4double tkin, G4double cut,
123 G4double tmax); 118 G4double tmax);
124 119
125 G4double ComputeMicroscopicCrossSection(G4do 120 G4double ComputeMicroscopicCrossSection(G4double tkin,
126 G4do 121 G4double Z,
127 G4do 122 G4double cut);
128 123
129 G4double FindScaledEnergy(G4int Z, G4double << 124 virtual G4double
130 G4double yymin, G4double yymax); << 125 ComputeDMicroscopicCrossSection(G4double tkin, G4double Z,
>> 126 G4double pairEnergy);
131 127
132 inline G4double MaxSecondaryEnergyForElement 128 inline G4double MaxSecondaryEnergyForElement(G4double kineticEnergy,
133 G4double Z); 129 G4double Z);
134 130
>> 131 private:
>> 132
135 void MakeSamplingTables(); 133 void MakeSamplingTables();
136 134
137 void StoreTables() const; 135 void StoreTables() const;
138 136
139 G4bool RetrieveTables(); 137 G4bool RetrieveTables();
140 138
141 virtual void DataCorrupted(G4int Z, G4double << 139 void DataCorrupted(G4int Z, G4double logTkin) const;
>> 140
>> 141 inline G4double FindScaledEnergy(G4int Z, G4double rand, G4double logTkin,
>> 142 G4double yymin, G4double yymax);
>> 143
>> 144 protected:
>> 145
>> 146 G4ParticleDefinition* theElectron = nullptr;
>> 147 G4ParticleDefinition* thePositron = nullptr;
>> 148 G4ParticleChangeForLoss* fParticleChange = nullptr;
142 149
143 G4ParticleChangeForLoss* fParticleChange = n <<
144 const G4ParticleDefinition* particle = nullp 150 const G4ParticleDefinition* particle = nullptr;
145 G4NistManager* nist = nullptr; << 151 G4NistManager* nist = nullptr;
146 152
147 G4double factorForCross; 153 G4double factorForCross;
148 G4double sqrte; 154 G4double sqrte;
149 G4double particleMass = 0.0; 155 G4double particleMass = 0.0;
150 G4double z13 = 0.0; 156 G4double z13 = 0.0;
151 G4double z23 = 0.0; 157 G4double z23 = 0.0;
152 G4double lnZ = 0.0; 158 G4double lnZ = 0.0;
153 159
154 G4double minPairEnergy; 160 G4double minPairEnergy;
155 G4double lowestKinEnergy; 161 G4double lowestKinEnergy;
156 162
157 G4double emin; 163 G4double emin;
158 G4double emax; 164 G4double emax;
159 G4double ymin = -5.0; 165 G4double ymin = -5.0;
160 G4double dy = 0.005; 166 G4double dy = 0.005;
161 167
162 G4int currentZ = 0; << 168 G4int currentZ = 0;
163 G4int nYBinPerDecade = 4; << 169 G4int nYBinPerDecade = 4;
164 std::size_t nbiny = 1000; << 170 size_t nbiny = 1000;
165 std::size_t nbine = 0; << 171 size_t nbine = 0;
166 172
167 G4bool fTableToFile = false; 173 G4bool fTableToFile = false;
168 <<
169 // static members <<
170 static const G4int NZDATPAIR = 5; <<
171 static const G4int NINTPAIR = 8; <<
172 static const G4int ZDATPAIR[NZDATPAIR]; <<
173 static const G4double xgi[NINTPAIR]; <<
174 static const G4double wgi[NINTPAIR]; <<
175 <<
176 private: <<
177 <<
178 G4ParticleDefinition* theElectron; <<
179 G4ParticleDefinition* thePositron; <<
180 G4String dataName{""}; <<
181 }; 174 };
182 175
183 //....oooOO0OOooo........oooOO0OOooo........oo 176 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
184 177
185 inline void G4MuPairProductionModel::SetLowest 178 inline void G4MuPairProductionModel::SetLowestKineticEnergy(G4double e)
186 { 179 {
187 lowestKinEnergy = e; 180 lowestKinEnergy = e;
188 } 181 }
189 182
190 //....oooOO0OOooo........oooOO0OOooo........oo 183 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
191 184
192 inline 185 inline
193 void G4MuPairProductionModel::SetParticle(cons 186 void G4MuPairProductionModel::SetParticle(const G4ParticleDefinition* p)
194 { 187 {
195 if(nullptr == particle) { 188 if(nullptr == particle) {
196 particle = p; 189 particle = p;
197 particleMass = particle->GetPDGMass(); 190 particleMass = particle->GetPDGMass();
198 } 191 }
199 } 192 }
200 193
201 //....oooOO0OOooo........oooOO0OOooo........oo 194 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
202 195
203 inline G4double 196 inline G4double
204 G4MuPairProductionModel::MaxSecondaryEnergyFor 197 G4MuPairProductionModel::MaxSecondaryEnergyForElement(G4double kineticEnergy,
205 G4double ZZ) 198 G4double ZZ)
206 { 199 {
207 G4int Z = G4lrint(ZZ); 200 G4int Z = G4lrint(ZZ);
208 if(Z != currentZ) { 201 if(Z != currentZ) {
209 currentZ = Z; 202 currentZ = Z;
210 z13 = nist->GetZ13(Z); 203 z13 = nist->GetZ13(Z);
211 z23 = z13*z13; 204 z23 = z13*z13;
212 lnZ = nist->GetLOGZ(Z); 205 lnZ = nist->GetLOGZ(Z);
213 } 206 }
214 return kineticEnergy + particleMass*(1.0 - 0 207 return kineticEnergy + particleMass*(1.0 - 0.75*sqrte*z13);
>> 208 }
>> 209
>> 210 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 211
>> 212 inline G4double
>> 213 G4MuPairProductionModel::FindScaledEnergy(G4int Z, G4double rand,
>> 214 G4double logTkin,
>> 215 G4double yymin, G4double yymax)
>> 216 {
>> 217 G4double res = yymin;
>> 218 G4Physics2DVector* pv = fElementData->GetElement2DData(Z);
>> 219 if(nullptr == pv) {
>> 220 DataCorrupted(Z, logTkin);
>> 221 } else {
>> 222 G4double pmin = pv->Value(yymin, logTkin);
>> 223 G4double pmax = pv->Value(yymax, logTkin);
>> 224 G4double p0 = pv->Value(0.0, logTkin);
>> 225 if(p0 <= 0.0) { DataCorrupted(Z, logTkin); }
>> 226 else { res = pv->FindLinearX((pmin + rand*(pmax - pmin))/p0, logTkin); }
>> 227 }
>> 228 return res;
215 } 229 }
216 230
217 //....oooOO0OOooo........oooOO0OOooo........oo 231 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
218 232
219 #endif 233 #endif
220 234