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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 "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 G4MuPairProductionModel(const G4ParticleDefinition* p = 0,
77 const G4Str << 76 const G4String& nam = "muPairProd");
78 <<
79 ~G4MuPairProductionModel() override = defaul <<
80 77
81 void Initialise(const G4ParticleDefinition*, << 78 virtual ~G4MuPairProductionModel();
82 79
83 void InitialiseLocal(const G4ParticleDefinit << 80 virtual void Initialise(const G4ParticleDefinition*, const G4DataVector&);
84 G4VEmModel* masterModel <<
85 81
86 G4double ComputeCrossSectionPerAtom(const G4 << 82 virtual G4double ComputeCrossSectionPerAtom(
87 G4double kineticEnergy, << 83 const G4ParticleDefinition*,
88 G4double Z, G4double A, << 84 G4double kineticEnergy,
89 G4double cutEnergy, << 85 G4double Z, G4double A,
90 G4double maxEnergy) override; << 86 G4double cutEnergy,
>> 87 G4double maxEnergy);
91 88
92 G4double ComputeDEDXPerVolume(const G4Materi << 89 virtual G4double ComputeDEDXPerVolume(const G4Material*,
93 const G4Partic 90 const G4ParticleDefinition*,
94 G4double kinet 91 G4double kineticEnergy,
95 G4double cutEn << 92 G4double cutEnergy);
96 93
97 void SampleSecondaries(std::vector<G4Dynamic << 94 virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
98 const G4MaterialCutsCouple*, << 95 const G4MaterialCutsCouple*,
99 const G4DynamicParticle*, << 96 const G4DynamicParticle*,
100 G4double tmin, << 97 G4double tmin,
101 G4double maxEnergy) override; << 98 G4double maxEnergy);
102 << 99
103 G4double MinPrimaryEnergy(const G4Material*, << 100 virtual G4double MinEnergyCut(const G4ParticleDefinition*,
104 const G4ParticleDe << 101 const G4MaterialCutsCouple*);
105 G4double) override <<
106 <<
107 virtual G4double <<
108 ComputeDMicroscopicCrossSection(G4double tki <<
109 G4double pairEnergy); <<
110 102
111 inline void SetLowestKineticEnergy(G4double 103 inline void SetLowestKineticEnergy(G4double e);
112 104
113 inline void SetParticle(const G4ParticleDefi 105 inline void SetParticle(const G4ParticleDefinition*);
114 106
115 // hide assignment operator and copy constru <<
116 G4MuPairProductionModel & operator= <<
117 (const G4MuPairProductionModel &right) = del <<
118 G4MuPairProductionModel(const G4MuPairProdu <<
119 <<
120 protected: 107 protected:
121 108
122 G4double ComputMuPairLoss(G4double Z, G4doub 109 G4double ComputMuPairLoss(G4double Z, G4double tkin, G4double cut,
123 G4double tmax); 110 G4double tmax);
124 111
125 G4double ComputeMicroscopicCrossSection(G4do 112 G4double ComputeMicroscopicCrossSection(G4double tkin,
126 G4do 113 G4double Z,
127 G4do 114 G4double cut);
128 115
129 G4double FindScaledEnergy(G4int Z, G4double << 116 virtual G4double ComputeDMicroscopicCrossSection(G4double tkin,
130 G4double yymin, G4double yymax); << 117 G4double Z,
>> 118 G4double pairEnergy);
131 119
132 inline G4double MaxSecondaryEnergyForElement << 120 virtual G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
133 G4double Z); << 121 G4double kineticEnergy);
134 122
135 void MakeSamplingTables(); << 123 inline void SetCurrentElement(G4double Z);
136 124
137 void StoreTables() const; << 125 private:
>> 126
>> 127 const G4Element* SelectRandomAtom(G4double kinEnergy,
>> 128 G4double dt,
>> 129 G4int it,
>> 130 const G4MaterialCutsCouple* couple,
>> 131 G4double tmin);
138 132
139 G4bool RetrieveTables(); << 133 void MakeSamplingTables();
140 134
141 virtual void DataCorrupted(G4int Z, G4double << 135 inline G4double InterpolatedIntegralCrossSection(
>> 136 G4double dt, G4double dz, G4int iz,
>> 137 G4int it, G4int iy, G4double z);
>> 138
>> 139 // hide assignment operator
>> 140 G4MuPairProductionModel & operator=(const G4MuPairProductionModel &right);
>> 141 G4MuPairProductionModel(const G4MuPairProductionModel&);
>> 142
>> 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 currentZ;
151 G4double z23 = 0.0; << 152 G4double z13;
152 G4double lnZ = 0.0; << 153 G4double z23;
>> 154 G4double lnZ;
>> 155
>> 156 static G4double xgi[8],wgi[8];
>> 157
>> 158 private:
>> 159
>> 160 G4ParticleDefinition* theElectron;
>> 161 G4ParticleDefinition* thePositron;
>> 162 G4ParticleChangeForLoss* fParticleChange;
153 163
154 G4double minPairEnergy; 164 G4double minPairEnergy;
155 G4double lowestKinEnergy; 165 G4double lowestKinEnergy;
156 166
157 G4double emin; << 167 // tables for sampling
158 G4double emax; << 168 G4int nzdat;
159 G4double ymin = -5.0; << 169 G4int ntdat;
160 G4double dy = 0.005; << 170 G4int nbiny;
161 << 171 size_t nmaxElements;
162 G4int currentZ = 0; << 172 static G4double zdat[5], adat[5], tdat[8];
163 G4int nYBinPerDecade = 4; << 173 G4double ya[1001], proba[5][8][1001];
164 std::size_t nbiny = 1000; << 174
165 std::size_t nbine = 0; << 175 G4double ymin;
166 << 176 G4double ymax;
167 G4bool fTableToFile = false; << 177 G4double dy;
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
178 G4ParticleDefinition* theElectron; << 179 G4bool samplingTablesAreFilled;
179 G4ParticleDefinition* thePositron; << 180 std::vector<G4double> partialSum;
180 G4String dataName{""}; <<
181 }; 181 };
182 182
183 //....oooOO0OOooo........oooOO0OOooo........oo 183 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
184 184
185 inline void G4MuPairProductionModel::SetLowest 185 inline void G4MuPairProductionModel::SetLowestKineticEnergy(G4double e)
186 { 186 {
187 lowestKinEnergy = e; 187 lowestKinEnergy = e;
188 } 188 }
189 189
190 //....oooOO0OOooo........oooOO0OOooo........oo 190 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
191 191
192 inline 192 inline
193 void G4MuPairProductionModel::SetParticle(cons 193 void G4MuPairProductionModel::SetParticle(const G4ParticleDefinition* p)
194 { 194 {
195 if(nullptr == particle) { << 195 if(!particle) {
196 particle = p; 196 particle = p;
197 particleMass = particle->GetPDGMass(); 197 particleMass = particle->GetPDGMass();
198 } 198 }
199 } 199 }
200 200
201 //....oooOO0OOooo........oooOO0OOooo........oo 201 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
202 202
203 inline G4double << 203 inline void G4MuPairProductionModel::SetCurrentElement(G4double Z)
204 G4MuPairProductionModel::MaxSecondaryEnergyFor <<
205 G4double ZZ) <<
206 { 204 {
207 G4int Z = G4lrint(ZZ); <<
208 if(Z != currentZ) { 205 if(Z != currentZ) {
209 currentZ = Z; 206 currentZ = Z;
210 z13 = nist->GetZ13(Z); << 207 G4int iz = G4int(Z);
>> 208 z13 = nist->GetZ13(iz);
211 z23 = z13*z13; 209 z23 = z13*z13;
212 lnZ = nist->GetLOGZ(Z); << 210 lnZ = nist->GetLOGZ(iz);
213 } 211 }
214 return kineticEnergy + particleMass*(1.0 - 0 << 212 }
>> 213
>> 214 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 215
>> 216 inline G4double G4MuPairProductionModel::InterpolatedIntegralCrossSection(
>> 217 G4double dt, G4double dz,
>> 218 G4int iz, G4int it, G4int iy, G4double z)
>> 219 {
>> 220 G4double fac = 1./(zdat[iz] *(zdat[iz] +1.));
>> 221 G4double fac1 = 1./(zdat[iz-1]*(zdat[iz-1]+1.));
>> 222 G4double f0 = fac1*proba[iz-1][it-1][iy] +
>> 223 (fac*proba[iz][it-1][iy]-fac1*proba[iz-1][it-1][iy])*dz;
>> 224 G4double f1 = fac1*proba[iz-1][it ][iy] +
>> 225 (fac*proba[iz][it ][iy]-fac1*proba[iz-1][it ][iy])*dz;
>> 226 return (f0 + (f1-f0)*dt)*z*(z+1.);
215 } 227 }
216 228
217 //....oooOO0OOooo........oooOO0OOooo........oo 229 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
218 230
219 #endif 231 #endif
220 232