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25 // 25 //
>> 26 // $Id: G4MuPairProductionModel.hh,v 1.29 2010-10-26 13:52:32 vnivanch Exp $
>> 27 // GEANT4 tag $Name: not supported by cvs2svn $
26 // 28 //
27 // ------------------------------------------- 29 // -------------------------------------------------------------------
28 // 30 //
29 // GEANT4 Class header file 31 // GEANT4 Class header file
30 // 32 //
31 // 33 //
32 // File name: G4MuPairProductionModel 34 // File name: G4MuPairProductionModel
33 // 35 //
34 // Author: Vladimir Ivanchenko on base 36 // Author: Vladimir Ivanchenko on base of Laszlo Urban code
35 // 37 //
36 // Creation date: 18.05.2002 38 // Creation date: 18.05.2002
37 // 39 //
38 // Modifications: 40 // Modifications:
39 // 41 //
40 // 23-12-02 Change interface in order to move 42 // 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 43 // 27-01-03 Make models region aware (V.Ivanchenko)
42 // 13-02-03 Add name (V.Ivanchenko) 44 // 13-02-03 Add name (V.Ivanchenko)
43 // 10-02-04 Update parameterisation using R.Ko 45 // 10-02-04 Update parameterisation using R.Kokoulin model (V.Ivanchenko)
44 // 10-02-04 Add lowestKinEnergy (V.Ivanchenko) 46 // 10-02-04 Add lowestKinEnergy (V.Ivanchenko)
45 // 13-02-06 Add ComputeCrossSectionPerAtom (mm 47 // 13-02-06 Add ComputeCrossSectionPerAtom (mma)
46 // 12-05-06 Add parameter to SelectRandomAtom 48 // 12-05-06 Add parameter to SelectRandomAtom (A.Bogdanov)
47 // 11-10-07 Add ignoreCut flag (V.Ivanchenko) 49 // 11-10-07 Add ignoreCut flag (V.Ivanchenko)
48 // 28-02-08 Reorganized protected methods and 50 // 28-02-08 Reorganized protected methods and members (V.Ivanchenko)
>> 51
49 // 52 //
50 // Class Description: 53 // Class Description:
51 // 54 //
52 // Implementation of e+e- pair production by m 55 // 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 // 56 //
>> 57
56 // ------------------------------------------- 58 // -------------------------------------------------------------------
57 // 59 //
58 60
59 #ifndef G4MuPairProductionModel_h 61 #ifndef G4MuPairProductionModel_h
60 #define G4MuPairProductionModel_h 1 62 #define G4MuPairProductionModel_h 1
61 63
62 #include "G4VEmModel.hh" 64 #include "G4VEmModel.hh"
63 #include "G4NistManager.hh" 65 #include "G4NistManager.hh"
64 #include "G4ElementData.hh" <<
65 #include "G4Physics2DVector.hh" <<
66 #include <vector> 66 #include <vector>
67 67
68 class G4Element; 68 class G4Element;
69 class G4ParticleChangeForLoss; 69 class G4ParticleChangeForLoss;
70 class G4ParticleChangeForGamma; 70 class G4ParticleChangeForGamma;
71 71
72 class G4MuPairProductionModel : public G4VEmMo 72 class G4MuPairProductionModel : public G4VEmModel
73 { 73 {
74 public: 74 public:
75 75
76 explicit G4MuPairProductionModel(const G4Par << 76 G4MuPairProductionModel(const G4ParticleDefinition* p = 0,
77 const G4Str << 77 const G4String& nam = "muPairProd");
78 <<
79 ~G4MuPairProductionModel() override = defaul <<
80 78
81 void Initialise(const G4ParticleDefinition*, << 79 virtual ~G4MuPairProductionModel();
82 80
83 void InitialiseLocal(const G4ParticleDefinit << 81 virtual void Initialise(const G4ParticleDefinition*, const G4DataVector&);
84 G4VEmModel* masterModel <<
85 82
86 G4double ComputeCrossSectionPerAtom(const G4 << 83 virtual G4double ComputeCrossSectionPerAtom(
87 G4double kineticEnergy, << 84 const G4ParticleDefinition*,
88 G4double Z, G4double A, << 85 G4double kineticEnergy,
89 G4double cutEnergy, << 86 G4double Z, G4double A,
90 G4double maxEnergy) override; << 87 G4double cutEnergy,
>> 88 G4double maxEnergy);
91 89
92 G4double ComputeDEDXPerVolume(const G4Materi << 90 virtual G4double ComputeDEDXPerVolume(const G4Material*,
93 const G4Partic 91 const G4ParticleDefinition*,
94 G4double kinet 92 G4double kineticEnergy,
95 G4double cutEn << 93 G4double cutEnergy);
96 94
97 void SampleSecondaries(std::vector<G4Dynamic << 95 virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
98 const G4MaterialCutsCouple*, << 96 const G4MaterialCutsCouple*,
99 const G4DynamicParticle*, << 97 const G4DynamicParticle*,
100 G4double tmin, << 98 G4double tmin,
101 G4double maxEnergy) override; << 99 G4double maxEnergy);
102 << 100
103 G4double MinPrimaryEnergy(const G4Material*, << 101 virtual G4double MinEnergyCut(const G4ParticleDefinition*,
104 const G4ParticleDe << 102 const G4MaterialCutsCouple*);
105 G4double) override <<
106 <<
107 virtual G4double <<
108 ComputeDMicroscopicCrossSection(G4double tki <<
109 G4double pairEnergy); <<
110 103
111 inline void SetLowestKineticEnergy(G4double 104 inline void SetLowestKineticEnergy(G4double e);
112 105
113 inline void SetParticle(const G4ParticleDefi 106 inline void SetParticle(const G4ParticleDefinition*);
114 107
115 // hide assignment operator and copy constru <<
116 G4MuPairProductionModel & operator= <<
117 (const G4MuPairProductionModel &right) = del <<
118 G4MuPairProductionModel(const G4MuPairProdu <<
119 <<
120 protected: 108 protected:
121 109
122 G4double ComputMuPairLoss(G4double Z, G4doub 110 G4double ComputMuPairLoss(G4double Z, G4double tkin, G4double cut,
123 G4double tmax); 111 G4double tmax);
124 112
125 G4double ComputeMicroscopicCrossSection(G4do 113 G4double ComputeMicroscopicCrossSection(G4double tkin,
126 G4do 114 G4double Z,
127 G4do 115 G4double cut);
128 116
129 G4double FindScaledEnergy(G4int Z, G4double << 117 virtual G4double ComputeDMicroscopicCrossSection(G4double tkin,
130 G4double yymin, G4double yymax); << 118 G4double Z,
>> 119 G4double pairEnergy);
131 120
132 inline G4double MaxSecondaryEnergyForElement << 121 virtual G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
133 G4double Z); << 122 G4double kineticEnergy);
134 123
135 void MakeSamplingTables(); << 124 inline void SetCurrentElement(G4double Z);
136 125
137 void StoreTables() const; << 126 private:
>> 127
>> 128 const G4Element* SelectRandomAtom(G4double kinEnergy,
>> 129 G4double dt,
>> 130 G4int it,
>> 131 const G4MaterialCutsCouple* couple,
>> 132 G4double tmin);
138 133
139 G4bool RetrieveTables(); << 134 void MakeSamplingTables();
140 135
141 virtual void DataCorrupted(G4int Z, G4double << 136 inline G4double InterpolatedIntegralCrossSection(
>> 137 G4double dt, G4double dz, G4int iz,
>> 138 G4int it, G4int iy, G4double z);
>> 139
>> 140 // hide assignment operator
>> 141 G4MuPairProductionModel & operator=(const G4MuPairProductionModel &right);
>> 142 G4MuPairProductionModel(const G4MuPairProductionModel&);
>> 143
>> 144 protected:
142 145
143 G4ParticleChangeForLoss* fParticleChange = n << 146 const G4ParticleDefinition* particle;
144 const G4ParticleDefinition* particle = nullp << 147 G4NistManager* nist;
145 G4NistManager* nist = nullptr; <<
146 148
147 G4double factorForCross; 149 G4double factorForCross;
148 G4double sqrte; 150 G4double sqrte;
149 G4double particleMass = 0.0; << 151 G4double particleMass;
150 G4double z13 = 0.0; << 152 G4double currentZ;
151 G4double z23 = 0.0; << 153 G4double z13;
152 G4double lnZ = 0.0; << 154 G4double z23;
>> 155 G4double lnZ;
>> 156
>> 157 static G4double xgi[8],wgi[8];
>> 158
>> 159 private:
>> 160
>> 161 G4ParticleDefinition* theElectron;
>> 162 G4ParticleDefinition* thePositron;
>> 163 G4ParticleChangeForLoss* fParticleChange;
153 164
154 G4double minPairEnergy; 165 G4double minPairEnergy;
155 G4double lowestKinEnergy; 166 G4double lowestKinEnergy;
156 167
157 G4double emin; << 168 // tables for sampling
158 G4double emax; << 169 G4int nzdat;
159 G4double ymin = -5.0; << 170 G4int ntdat;
160 G4double dy = 0.005; << 171 G4int nbiny;
161 << 172 size_t nmaxElements;
162 G4int currentZ = 0; << 173 static G4double zdat[5], adat[5], tdat[8];
163 G4int nYBinPerDecade = 4; << 174 G4double ya[1001], proba[5][8][1001];
164 std::size_t nbiny = 1000; << 175
165 std::size_t nbine = 0; << 176 G4double ymin;
166 << 177 G4double ymax;
167 G4bool fTableToFile = false; << 178 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: <<
177 179
178 G4ParticleDefinition* theElectron; << 180 G4bool samplingTablesAreFilled;
179 G4ParticleDefinition* thePositron; << 181 std::vector<G4double> partialSum;
180 G4String dataName{""}; <<
181 }; 182 };
182 183
183 //....oooOO0OOooo........oooOO0OOooo........oo 184 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
184 185
185 inline void G4MuPairProductionModel::SetLowest 186 inline void G4MuPairProductionModel::SetLowestKineticEnergy(G4double e)
186 { 187 {
187 lowestKinEnergy = e; 188 lowestKinEnergy = e;
188 } 189 }
189 190
190 //....oooOO0OOooo........oooOO0OOooo........oo 191 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
191 192
192 inline 193 inline
193 void G4MuPairProductionModel::SetParticle(cons 194 void G4MuPairProductionModel::SetParticle(const G4ParticleDefinition* p)
194 { 195 {
195 if(nullptr == particle) { << 196 if(!particle) {
196 particle = p; 197 particle = p;
197 particleMass = particle->GetPDGMass(); 198 particleMass = particle->GetPDGMass();
198 } 199 }
199 } 200 }
200 201
201 //....oooOO0OOooo........oooOO0OOooo........oo 202 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
202 203
203 inline G4double << 204 inline void G4MuPairProductionModel::SetCurrentElement(G4double Z)
204 G4MuPairProductionModel::MaxSecondaryEnergyFor <<
205 G4double ZZ) <<
206 { 205 {
207 G4int Z = G4lrint(ZZ); <<
208 if(Z != currentZ) { 206 if(Z != currentZ) {
209 currentZ = Z; 207 currentZ = Z;
210 z13 = nist->GetZ13(Z); << 208 G4int iz = G4int(Z);
>> 209 z13 = nist->GetZ13(iz);
211 z23 = z13*z13; 210 z23 = z13*z13;
212 lnZ = nist->GetLOGZ(Z); << 211 lnZ = nist->GetLOGZ(iz);
213 } 212 }
214 return kineticEnergy + particleMass*(1.0 - 0 << 213 }
>> 214
>> 215 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 216
>> 217 inline G4double G4MuPairProductionModel::InterpolatedIntegralCrossSection(
>> 218 G4double dt, G4double dz,
>> 219 G4int iz, G4int it, G4int iy, G4double z)
>> 220 {
>> 221 G4double fac = 1./(zdat[iz] *(zdat[iz] +1.));
>> 222 G4double fac1 = 1./(zdat[iz-1]*(zdat[iz-1]+1.));
>> 223 G4double f0 = fac1*proba[iz-1][it-1][iy] +
>> 224 (fac*proba[iz][it-1][iy]-fac1*proba[iz-1][it-1][iy])*dz;
>> 225 G4double f1 = fac1*proba[iz-1][it ][iy] +
>> 226 (fac*proba[iz][it ][iy]-fac1*proba[iz-1][it ][iy])*dz;
>> 227 return (f0 + (f1-f0)*dt)*z*(z+1.);
215 } 228 }
216 229
217 //....oooOO0OOooo........oooOO0OOooo........oo 230 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
218 231
219 #endif 232 #endif
220 233