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25 // 25 //
>> 26 // $Id$
26 // 27 //
27 // ------------------------------------------- 28 // -------------------------------------------------------------------
28 // 29 //
29 // GEANT4 Class header file 30 // GEANT4 Class header file
30 // 31 //
31 // 32 //
32 // File name: G4MuPairProductionModel 33 // File name: G4MuPairProductionModel
33 // 34 //
34 // Author: Vladimir Ivanchenko on base 35 // Author: Vladimir Ivanchenko on base of Laszlo Urban code
35 // 36 //
36 // Creation date: 18.05.2002 37 // Creation date: 18.05.2002
37 // 38 //
38 // Modifications: 39 // Modifications:
39 // 40 //
40 // 23-12-02 Change interface in order to move 41 // 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 42 // 27-01-03 Make models region aware (V.Ivanchenko)
42 // 13-02-03 Add name (V.Ivanchenko) 43 // 13-02-03 Add name (V.Ivanchenko)
43 // 10-02-04 Update parameterisation using R.Ko 44 // 10-02-04 Update parameterisation using R.Kokoulin model (V.Ivanchenko)
44 // 10-02-04 Add lowestKinEnergy (V.Ivanchenko) 45 // 10-02-04 Add lowestKinEnergy (V.Ivanchenko)
45 // 13-02-06 Add ComputeCrossSectionPerAtom (mm 46 // 13-02-06 Add ComputeCrossSectionPerAtom (mma)
46 // 12-05-06 Add parameter to SelectRandomAtom 47 // 12-05-06 Add parameter to SelectRandomAtom (A.Bogdanov)
47 // 11-10-07 Add ignoreCut flag (V.Ivanchenko) 48 // 11-10-07 Add ignoreCut flag (V.Ivanchenko)
48 // 28-02-08 Reorganized protected methods and 49 // 28-02-08 Reorganized protected methods and members (V.Ivanchenko)
>> 50
49 // 51 //
50 // Class Description: 52 // Class Description:
51 // 53 //
52 // Implementation of e+e- pair production by m 54 // Implementation of e+e- pair production by muons
53 // A.G. Bogdanov et al., IEEE Trans. Nuc. Sci. <<
54 // Base class for all pair production models f <<
55 // 55 //
>> 56
56 // ------------------------------------------- 57 // -------------------------------------------------------------------
57 // 58 //
58 59
59 #ifndef G4MuPairProductionModel_h 60 #ifndef G4MuPairProductionModel_h
60 #define G4MuPairProductionModel_h 1 61 #define G4MuPairProductionModel_h 1
61 62
62 #include "G4VEmModel.hh" 63 #include "G4VEmModel.hh"
63 #include "G4NistManager.hh" 64 #include "G4NistManager.hh"
64 #include "G4ElementData.hh" 65 #include "G4ElementData.hh"
65 #include "G4Physics2DVector.hh" 66 #include "G4Physics2DVector.hh"
66 #include <vector> 67 #include <vector>
67 68
68 class G4Element; 69 class G4Element;
69 class G4ParticleChangeForLoss; 70 class G4ParticleChangeForLoss;
70 class G4ParticleChangeForGamma; 71 class G4ParticleChangeForGamma;
71 72
72 class G4MuPairProductionModel : public G4VEmMo 73 class G4MuPairProductionModel : public G4VEmModel
73 { 74 {
74 public: 75 public:
75 76
76 explicit G4MuPairProductionModel(const G4Par 77 explicit G4MuPairProductionModel(const G4ParticleDefinition* p = nullptr,
77 const G4Str 78 const G4String& nam = "muPairProd");
78 79
79 ~G4MuPairProductionModel() override = defaul << 80 virtual ~G4MuPairProductionModel();
80 81
81 void Initialise(const G4ParticleDefinition*, << 82 virtual void Initialise(const G4ParticleDefinition*,
>> 83 const G4DataVector&) override;
82 84
83 void InitialiseLocal(const G4ParticleDefinit << 85 virtual void InitialiseLocal(const G4ParticleDefinition*,
84 G4VEmModel* masterModel << 86 G4VEmModel* masterModel) override;
85 87
86 G4double ComputeCrossSectionPerAtom(const G4 << 88 virtual G4double ComputeCrossSectionPerAtom(
87 G4double kineticEnergy, << 89 const G4ParticleDefinition*,
88 G4double Z, G4double A, << 90 G4double kineticEnergy,
89 G4double cutEnergy, << 91 G4double Z, G4double A,
90 G4double maxEnergy) override; << 92 G4double cutEnergy,
>> 93 G4double maxEnergy) override;
91 94
92 G4double ComputeDEDXPerVolume(const G4Materi << 95 virtual G4double ComputeDEDXPerVolume(const G4Material*,
93 const G4Partic 96 const G4ParticleDefinition*,
94 G4double kinet 97 G4double kineticEnergy,
95 G4double cutEn 98 G4double cutEnergy) override;
96 99
97 void SampleSecondaries(std::vector<G4Dynamic << 100 virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
98 const G4MaterialCutsCouple*, << 101 const G4MaterialCutsCouple*,
99 const G4DynamicParticle*, << 102 const G4DynamicParticle*,
100 G4double tmin, << 103 G4double tmin,
101 G4double maxEnergy) override; << 104 G4double maxEnergy) override;
102 << 105
103 G4double MinPrimaryEnergy(const G4Material*, << 106 virtual G4double MinPrimaryEnergy(const G4Material*,
104 const G4ParticleDe << 107 const G4ParticleDefinition*,
105 G4double) override << 108 G4double) override;
106 <<
107 virtual G4double <<
108 ComputeDMicroscopicCrossSection(G4double tki <<
109 G4double pairEnergy); <<
110 109
111 inline void SetLowestKineticEnergy(G4double 110 inline void SetLowestKineticEnergy(G4double e);
112 111
113 inline void SetParticle(const G4ParticleDefi 112 inline void SetParticle(const G4ParticleDefinition*);
114 113
115 // hide assignment operator and copy constru <<
116 G4MuPairProductionModel & operator= <<
117 (const G4MuPairProductionModel &right) = del <<
118 G4MuPairProductionModel(const G4MuPairProdu <<
119 <<
120 protected: 114 protected:
121 115
122 G4double ComputMuPairLoss(G4double Z, G4doub 116 G4double ComputMuPairLoss(G4double Z, G4double tkin, G4double cut,
123 G4double tmax); 117 G4double tmax);
124 118
125 G4double ComputeMicroscopicCrossSection(G4do 119 G4double ComputeMicroscopicCrossSection(G4double tkin,
126 G4do 120 G4double Z,
127 G4do 121 G4double cut);
128 122
129 G4double FindScaledEnergy(G4int Z, G4double << 123 virtual G4double
130 G4double yymin, G4double yymax); << 124 ComputeDMicroscopicCrossSection(G4double tkin, G4double Z,
>> 125 G4double pairEnergy);
131 126
132 inline G4double MaxSecondaryEnergyForElement 127 inline G4double MaxSecondaryEnergyForElement(G4double kineticEnergy,
133 G4double Z); 128 G4double Z);
134 129
>> 130 private:
>> 131
135 void MakeSamplingTables(); 132 void MakeSamplingTables();
136 133
137 void StoreTables() const; << 134 void DataCorrupted(G4int Z, G4double logTkin);
>> 135
>> 136 inline G4double FindScaledEnergy(G4int Z, G4double rand, G4double logTkin,
>> 137 G4double yymin, G4double yymax);
138 138
139 G4bool RetrieveTables(); << 139 // hide assignment operator
>> 140 G4MuPairProductionModel & operator=(const G4MuPairProductionModel &right) = delete;
>> 141 G4MuPairProductionModel(const G4MuPairProductionModel&) = delete;
140 142
141 virtual void DataCorrupted(G4int Z, G4double << 143 protected:
142 144
143 G4ParticleChangeForLoss* fParticleChange = n << 145 const G4ParticleDefinition* particle;
144 const G4ParticleDefinition* particle = nullp << 146 G4NistManager* nist;
145 G4NistManager* nist = nullptr; <<
146 147
147 G4double factorForCross; 148 G4double factorForCross;
148 G4double sqrte; 149 G4double sqrte;
149 G4double particleMass = 0.0; << 150 G4double particleMass;
150 G4double z13 = 0.0; << 151 G4double z13;
151 G4double z23 = 0.0; << 152 G4double z23;
152 G4double lnZ = 0.0; << 153 G4double lnZ;
>> 154 G4int currentZ;
>> 155
>> 156 static const G4double xgi[8],wgi[8];
>> 157
>> 158 G4ParticleDefinition* theElectron;
>> 159 G4ParticleDefinition* thePositron;
>> 160 G4ParticleChangeForLoss* fParticleChange;
153 161
154 G4double minPairEnergy; 162 G4double minPairEnergy;
155 G4double lowestKinEnergy; 163 G4double lowestKinEnergy;
156 164
>> 165 G4int nzdat;
>> 166
>> 167 // gamma energy bins
>> 168 G4int nYBinPerDecade;
>> 169 size_t nbiny;
>> 170 size_t nbine;
>> 171 G4double ymin;
>> 172 G4double dy;
157 G4double emin; 173 G4double emin;
158 G4double emax; 174 G4double emax;
159 G4double ymin = -5.0; <<
160 G4double dy = 0.005; <<
161 <<
162 G4int currentZ = 0; <<
163 G4int nYBinPerDecade = 4; <<
164 std::size_t nbiny = 1000; <<
165 std::size_t nbine = 0; <<
166 <<
167 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 }; 175 };
182 176
183 //....oooOO0OOooo........oooOO0OOooo........oo 177 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
184 178
185 inline void G4MuPairProductionModel::SetLowest 179 inline void G4MuPairProductionModel::SetLowestKineticEnergy(G4double e)
186 { 180 {
187 lowestKinEnergy = e; 181 lowestKinEnergy = e;
188 } 182 }
189 183
190 //....oooOO0OOooo........oooOO0OOooo........oo 184 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
191 185
192 inline 186 inline
193 void G4MuPairProductionModel::SetParticle(cons 187 void G4MuPairProductionModel::SetParticle(const G4ParticleDefinition* p)
194 { 188 {
195 if(nullptr == particle) { << 189 if(!particle) {
196 particle = p; 190 particle = p;
197 particleMass = particle->GetPDGMass(); 191 particleMass = particle->GetPDGMass();
198 } 192 }
199 } 193 }
200 194
201 //....oooOO0OOooo........oooOO0OOooo........oo 195 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
202 196
203 inline G4double 197 inline G4double
204 G4MuPairProductionModel::MaxSecondaryEnergyFor 198 G4MuPairProductionModel::MaxSecondaryEnergyForElement(G4double kineticEnergy,
205 G4double ZZ) 199 G4double ZZ)
206 { 200 {
207 G4int Z = G4lrint(ZZ); 201 G4int Z = G4lrint(ZZ);
208 if(Z != currentZ) { 202 if(Z != currentZ) {
209 currentZ = Z; 203 currentZ = Z;
210 z13 = nist->GetZ13(Z); 204 z13 = nist->GetZ13(Z);
211 z23 = z13*z13; 205 z23 = z13*z13;
212 lnZ = nist->GetLOGZ(Z); 206 lnZ = nist->GetLOGZ(Z);
213 } 207 }
214 return kineticEnergy + particleMass*(1.0 - 0 208 return kineticEnergy + particleMass*(1.0 - 0.75*sqrte*z13);
>> 209 }
>> 210
>> 211 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 212
>> 213 inline G4double
>> 214 G4MuPairProductionModel::FindScaledEnergy(G4int Z, G4double rand,
>> 215 G4double logTkin,
>> 216 G4double yymin, G4double yymax)
>> 217 {
>> 218 G4double res = yymin;
>> 219 G4Physics2DVector* pv = fElementData->GetElement2DData(Z);
>> 220 if(!pv) {
>> 221 DataCorrupted(Z, logTkin);
>> 222 } else {
>> 223 G4double pmin = pv->Value(yymin, logTkin);
>> 224 G4double pmax = pv->Value(yymax, logTkin);
>> 225 G4double p0 = pv->Value(0.0, logTkin);
>> 226 if(p0 <= 0.0) { DataCorrupted(Z, logTkin); }
>> 227 else { res = pv->FindLinearX((pmin + rand*(pmax - pmin))/p0, logTkin); }
>> 228 }
>> 229 return res;
215 } 230 }
216 231
217 //....oooOO0OOooo........oooOO0OOooo........oo 232 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
218 233
219 #endif 234 #endif
220 235