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25 // 25 //
>> 26 // $Id: G4MuPairProductionModel.hh,v 1.24 2007/10/11 13:52:03 vnivanch Exp $
>> 27 // GEANT4 tag $Name: geant4-09-01 $
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
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 "G4ElementData.hh" <<
65 #include "G4Physics2DVector.hh" <<
66 #include <vector> 64 #include <vector>
67 65
68 class G4Element; 66 class G4Element;
69 class G4ParticleChangeForLoss; 67 class G4ParticleChangeForLoss;
70 class G4ParticleChangeForGamma; 68 class G4ParticleChangeForGamma;
71 69
72 class G4MuPairProductionModel : public G4VEmMo 70 class G4MuPairProductionModel : public G4VEmModel
73 { 71 {
>> 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");
>> 77
>> 78 virtual ~G4MuPairProductionModel();
>> 79
>> 80 void SetParticle(const G4ParticleDefinition*);
78 81
79 ~G4MuPairProductionModel() override = defaul << 82 void Initialise(const G4ParticleDefinition*, const G4DataVector&);
80 83
81 void Initialise(const G4ParticleDefinition*, << 84 void SetLowestKineticEnergy(G4double e) {lowestKinEnergy = e;};
82 85
83 void InitialiseLocal(const G4ParticleDefinit << 86 G4double MinEnergyCut(const G4ParticleDefinition*,
84 G4VEmModel* masterModel << 87 const G4MaterialCutsCouple*);
85 88
86 G4double ComputeCrossSectionPerAtom(const G4 << 89 virtual G4double ComputeCrossSectionPerAtom(
87 G4double kineticEnergy, << 90 const G4ParticleDefinition*,
88 G4double Z, G4double A, << 91 G4double kineticEnergy,
89 G4double cutEnergy, << 92 G4double Z, G4double A,
90 G4double maxEnergy) override; << 93 G4double cutEnergy,
>> 94 G4double maxEnergy);
91 95
92 G4double ComputeDEDXPerVolume(const G4Materi << 96 virtual G4double CrossSectionPerVolume(const G4Material*,
>> 97 const G4ParticleDefinition*,
>> 98 G4double kineticEnergy,
>> 99 G4double cutEnergy,
>> 100 G4double maxEnergy);
>> 101
>> 102 virtual G4double ComputeDEDXPerVolume(const G4Material*,
93 const G4Partic 103 const G4ParticleDefinition*,
94 G4double kinet 104 G4double kineticEnergy,
95 G4double cutEn << 105 G4double cutEnergy);
96 106
97 void SampleSecondaries(std::vector<G4Dynamic 107 void SampleSecondaries(std::vector<G4DynamicParticle*>*,
98 const G4MaterialCutsCouple*, << 108 const G4MaterialCutsCouple*,
99 const G4DynamicParticle*, << 109 const G4DynamicParticle*,
100 G4double tmin, << 110 G4double tmin,
101 G4double maxEnergy) override; << 111 G4double maxEnergy);
102 <<
103 G4double MinPrimaryEnergy(const G4Material*, <<
104 const G4ParticleDe <<
105 G4double) override <<
106 <<
107 virtual G4double <<
108 ComputeDMicroscopicCrossSection(G4double tki <<
109 G4double pairEnergy); <<
110 <<
111 inline void SetLowestKineticEnergy(G4double <<
112 <<
113 inline void SetParticle(const G4ParticleDefi <<
114 <<
115 // hide assignment operator and copy constru <<
116 G4MuPairProductionModel & operator= <<
117 (const G4MuPairProductionModel &right) = del <<
118 G4MuPairProductionModel(const G4MuPairProdu <<
119 112
120 protected: 113 protected:
121 114
>> 115 inline G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
>> 116 G4double kineticEnergy);
>> 117
>> 118
>> 119 public:
>> 120
122 G4double ComputMuPairLoss(G4double Z, G4doub 121 G4double ComputMuPairLoss(G4double Z, G4double tkin, G4double cut,
123 G4double tmax); 122 G4double tmax);
124 123
125 G4double ComputeMicroscopicCrossSection(G4do 124 G4double ComputeMicroscopicCrossSection(G4double tkin,
126 G4do 125 G4double Z,
127 G4do 126 G4double cut);
128 127
129 G4double FindScaledEnergy(G4int Z, G4double << 128 G4double ComputeDMicroscopicCrossSection(G4double tkin,
130 G4double yymin, G4double yymax); << 129 G4double Z,
>> 130 G4double pairEnergy);
131 131
132 inline G4double MaxSecondaryEnergyForElement << 132 inline void SetIgnoreCutFlag(G4bool);
133 G4double Z); <<
134 133
135 void MakeSamplingTables(); << 134 inline G4bool IgnoreCutFlag() const;
136 135
137 void StoreTables() const; << 136 private:
138 137
139 G4bool RetrieveTables(); << 138 const G4Element* SelectRandomAtom(G4double kinEnergy,
>> 139 G4double dt,
>> 140 G4int it,
>> 141 const G4MaterialCutsCouple* couple,
>> 142 G4double tmin);
140 143
141 virtual void DataCorrupted(G4int Z, G4double << 144 void MakeSamplingTables();
142 145
143 G4ParticleChangeForLoss* fParticleChange = n << 146 void SetCurrentElement(G4double Z);
144 const G4ParticleDefinition* particle = nullp <<
145 G4NistManager* nist = nullptr; <<
146 147
147 G4double factorForCross; << 148 inline G4double InterpolatedIntegralCrossSection(
148 G4double sqrte; << 149 G4double dt, G4double dz, G4int iz,
149 G4double particleMass = 0.0; << 150 G4int it, G4int iy, G4double z);
150 G4double z13 = 0.0; << 151
151 G4double z23 = 0.0; << 152 // hide assignment operator
152 G4double lnZ = 0.0; << 153 G4MuPairProductionModel & operator=(const G4MuPairProductionModel &right);
>> 154 G4MuPairProductionModel(const G4MuPairProductionModel&);
>> 155
>> 156 G4ParticleDefinition* theElectron;
>> 157 G4ParticleDefinition* thePositron;
>> 158 G4ParticleChangeForLoss* fParticleChange;
>> 159 G4ParticleChangeForGamma* gParticleChange;
153 160
154 G4double minPairEnergy; 161 G4double minPairEnergy;
155 G4double lowestKinEnergy; 162 G4double lowestKinEnergy;
156 163
157 G4double emin; << 164 G4double factorForCross;
158 G4double emax; << 165 G4double sqrte;
159 G4double ymin = -5.0; << 166 G4double particleMass;
160 G4double dy = 0.005; << 167 G4double currentZ;
161 << 168 G4double z13;
162 G4int currentZ = 0; << 169 G4double z23;
163 G4int nYBinPerDecade = 4; << 170 G4double lnZ;
164 std::size_t nbiny = 1000; << 171
165 std::size_t nbine = 0; << 172 const G4ParticleDefinition* particle;
166 << 173
167 G4bool fTableToFile = false; << 174 // tables for sampling
168 << 175 G4int nzdat;
169 // static members << 176 G4int ntdat;
170 static const G4int NZDATPAIR = 5; << 177 G4int nbiny;
171 static const G4int NINTPAIR = 8; << 178 size_t nmaxElements;
172 static const G4int ZDATPAIR[NZDATPAIR]; << 179 static G4double zdat[5],adat[5],tdat[8],xgi[8],wgi[8];
173 static const G4double xgi[NINTPAIR]; << 180 G4double ya[1001],proba[5][8][1001];
174 static const G4double wgi[NINTPAIR]; << 181
>> 182 G4double ymin;
>> 183 G4double ymax;
>> 184 G4double dy;
175 185
176 private: << 186 G4bool ignoreCut;
177 187
178 G4ParticleDefinition* theElectron; << 188 G4bool samplingTablesAreFilled;
179 G4ParticleDefinition* thePositron; << 189 std::vector<G4double> partialSum;
180 G4String dataName{""}; <<
181 }; 190 };
182 191
183 //....oooOO0OOooo........oooOO0OOooo........oo 192 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
184 193
185 inline void G4MuPairProductionModel::SetLowest << 194 inline G4double G4MuPairProductionModel::MaxSecondaryEnergy(
>> 195 const G4ParticleDefinition*,
>> 196 G4double kineticEnergy)
186 { 197 {
187 lowestKinEnergy = e; << 198 G4double maxPairEnergy = kineticEnergy + particleMass*(1.0 - 0.75*sqrte*z13);
>> 199 return maxPairEnergy;
188 } 200 }
189 201
190 //....oooOO0OOooo........oooOO0OOooo........oo 202 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
191 203
192 inline << 204 inline void G4MuPairProductionModel::SetCurrentElement(G4double Z)
193 void G4MuPairProductionModel::SetParticle(cons <<
194 { 205 {
195 if(nullptr == particle) { << 206 if(Z != currentZ) {
196 particle = p; << 207 currentZ = Z;
197 particleMass = particle->GetPDGMass(); << 208 z13 = std::pow(Z,0.333333333);
>> 209 z23 = z13*z13;
>> 210 lnZ = std::log(Z);
198 } 211 }
199 } 212 }
200 213
201 //....oooOO0OOooo........oooOO0OOooo........oo 214 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
202 215
203 inline G4double << 216 inline G4double G4MuPairProductionModel::InterpolatedIntegralCrossSection(
204 G4MuPairProductionModel::MaxSecondaryEnergyFor << 217 G4double dt, G4double dz,
205 G4double ZZ) << 218 G4int iz, G4int it, G4int iy, G4double z)
206 { 219 {
207 G4int Z = G4lrint(ZZ); << 220 G4double fac = 1./(zdat[iz] *(zdat[iz] +1.));
208 if(Z != currentZ) { << 221 G4double fac1 = 1./(zdat[iz-1]*(zdat[iz-1]+1.));
209 currentZ = Z; << 222 G4double f0 = fac1*proba[iz-1][it-1][iy] +
210 z13 = nist->GetZ13(Z); << 223 (fac*proba[iz][it-1][iy]-fac1*proba[iz-1][it-1][iy])*dz;
211 z23 = z13*z13; << 224 G4double f1 = fac1*proba[iz-1][it ][iy] +
212 lnZ = nist->GetLOGZ(Z); << 225 (fac*proba[iz][it ][iy]-fac1*proba[iz-1][it ][iy])*dz;
213 } << 226 return (f0 + (f1-f0)*dt)*z*(z+1.);
214 return kineticEnergy + particleMass*(1.0 - 0 << 227 }
>> 228
>> 229 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 230
>> 231 inline void G4MuPairProductionModel::SetIgnoreCutFlag(G4bool val)
>> 232 {
>> 233 ignoreCut = val;
>> 234 }
>> 235
>> 236 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 237
>> 238 inline G4bool G4MuPairProductionModel::IgnoreCutFlag() const
>> 239 {
>> 240 return ignoreCut;
215 } 241 }
216 242
217 //....oooOO0OOooo........oooOO0OOooo........oo 243 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
218 244
219 #endif 245 #endif
220 246