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25 // 25 //
>> 26 // $Id: G4MuPairProductionModel.hh,v 1.22 2007/05/22 17:35:58 vnivanch Exp $
>> 27 // GEANT4 tag $Name: geant4-09-00 $
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
48 // 28-02-08 Reorganized protected methods and <<
49 // 50 //
50 // Class Description: 51 // Class Description:
51 // 52 //
52 // Implementation of e+e- pair production by m 53 // 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 // 54 //
>> 55
56 // ------------------------------------------- 56 // -------------------------------------------------------------------
57 // 57 //
58 58
59 #ifndef G4MuPairProductionModel_h 59 #ifndef G4MuPairProductionModel_h
60 #define G4MuPairProductionModel_h 1 60 #define G4MuPairProductionModel_h 1
61 61
62 #include "G4VEmModel.hh" 62 #include "G4VEmModel.hh"
63 #include "G4NistManager.hh" <<
64 #include "G4ElementData.hh" <<
65 #include "G4Physics2DVector.hh" <<
66 #include <vector> 63 #include <vector>
67 64
68 class G4Element; 65 class G4Element;
69 class G4ParticleChangeForLoss; 66 class G4ParticleChangeForLoss;
70 class G4ParticleChangeForGamma; <<
71 67
72 class G4MuPairProductionModel : public G4VEmMo 68 class G4MuPairProductionModel : public G4VEmModel
73 { 69 {
>> 70
74 public: 71 public:
75 72
76 explicit G4MuPairProductionModel(const G4Par << 73 G4MuPairProductionModel(const G4ParticleDefinition* p = 0,
77 const G4Str << 74 const G4String& nam = "MuPairProd");
>> 75
>> 76 virtual ~G4MuPairProductionModel();
78 77
79 ~G4MuPairProductionModel() override = defaul << 78 void SetParticle(const G4ParticleDefinition*);
80 79
81 void Initialise(const G4ParticleDefinition*, << 80 void Initialise(const G4ParticleDefinition*, const G4DataVector&);
82 81
83 void InitialiseLocal(const G4ParticleDefinit << 82 void SetLowestKineticEnergy(G4double e) {lowestKinEnergy = e;};
84 G4VEmModel* masterModel << 83
>> 84 G4double MinEnergyCut(const G4ParticleDefinition*,
>> 85 const G4MaterialCutsCouple*);
85 86
86 G4double ComputeCrossSectionPerAtom(const G4 << 87 virtual G4double ComputeCrossSectionPerAtom(
87 G4double kineticEnergy, << 88 const G4ParticleDefinition*,
88 G4double Z, G4double A, << 89 G4double kineticEnergy,
89 G4double cutEnergy, << 90 G4double Z, G4double A,
90 G4double maxEnergy) override; << 91 G4double cutEnergy,
>> 92 G4double maxEnergy);
91 93
92 G4double ComputeDEDXPerVolume(const G4Materi << 94 virtual G4double CrossSectionPerVolume(const G4Material*,
>> 95 const G4ParticleDefinition*,
>> 96 G4double kineticEnergy,
>> 97 G4double cutEnergy,
>> 98 G4double maxEnergy);
>> 99
>> 100 virtual G4double ComputeDEDXPerVolume(const G4Material*,
93 const G4Partic 101 const G4ParticleDefinition*,
94 G4double kinet 102 G4double kineticEnergy,
95 G4double cutEn << 103 G4double cutEnergy);
96 104
97 void SampleSecondaries(std::vector<G4Dynamic 105 void SampleSecondaries(std::vector<G4DynamicParticle*>*,
98 const G4MaterialCutsCouple*, << 106 const G4MaterialCutsCouple*,
99 const G4DynamicParticle*, << 107 const G4DynamicParticle*,
100 G4double tmin, << 108 G4double tmin,
101 G4double maxEnergy) override; << 109 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 <<
119 110
120 protected: 111 protected:
121 112
>> 113 G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
>> 114 G4double kineticEnergy);
>> 115
>> 116
>> 117 public:
>> 118
122 G4double ComputMuPairLoss(G4double Z, G4doub 119 G4double ComputMuPairLoss(G4double Z, G4double tkin, G4double cut,
123 G4double tmax); 120 G4double tmax);
124 121
125 G4double ComputeMicroscopicCrossSection(G4do 122 G4double ComputeMicroscopicCrossSection(G4double tkin,
126 G4do 123 G4double Z,
127 G4do 124 G4double cut);
128 125
129 G4double FindScaledEnergy(G4int Z, G4double << 126 G4double ComputeDMicroscopicCrossSection(G4double tkin,
130 G4double yymin, G4double yymax); << 127 G4double Z,
131 << 128 G4double pairEnergy);
132 inline G4double MaxSecondaryEnergyForElement <<
133 G4double Z); <<
134 129
135 void MakeSamplingTables(); << 130 private:
136 131
137 void StoreTables() const; << 132 const G4Element* SelectRandomAtom(G4double kinEnergy, G4double dt, G4int it,
>> 133 const G4MaterialCutsCouple* couple, G4double tmin);
138 134
139 G4bool RetrieveTables(); << 135 void MakeSamplingTables();
140 136
141 virtual void DataCorrupted(G4int Z, G4double << 137 void SetCurrentElement(G4double Z);
142 138
143 G4ParticleChangeForLoss* fParticleChange = n << 139 G4double InterpolatedIntegralCrossSection(G4double dt, G4double dz, G4int iz,
144 const G4ParticleDefinition* particle = nullp << 140 G4int it, G4int iy, G4double z);
145 G4NistManager* nist = nullptr; <<
146 141
147 G4double factorForCross; << 142 // hide assignment operator
148 G4double sqrte; << 143 G4MuPairProductionModel & operator=(const G4MuPairProductionModel &right);
149 G4double particleMass = 0.0; << 144 G4MuPairProductionModel(const G4MuPairProductionModel&);
150 G4double z13 = 0.0; << 145
151 G4double z23 = 0.0; << 146 G4ParticleDefinition* theElectron;
152 G4double lnZ = 0.0; << 147 G4ParticleDefinition* thePositron;
>> 148 G4ParticleChangeForLoss* fParticleChange;
153 149
154 G4double minPairEnergy; 150 G4double minPairEnergy;
155 G4double lowestKinEnergy; 151 G4double lowestKinEnergy;
156 152
157 G4double emin; << 153 G4double factorForCross;
158 G4double emax; << 154 G4double sqrte;
159 G4double ymin = -5.0; << 155 G4double particleMass;
160 G4double dy = 0.005; << 156 G4double currentZ;
161 << 157 G4double z13;
162 G4int currentZ = 0; << 158 G4double z23;
163 G4int nYBinPerDecade = 4; << 159 G4double lnZ;
164 std::size_t nbiny = 1000; << 160
165 std::size_t nbine = 0; << 161 const G4ParticleDefinition* particle;
166 << 162
167 G4bool fTableToFile = false; << 163 // tables for sampling
168 << 164 G4int nzdat;
169 // static members << 165 G4int ntdat;
170 static const G4int NZDATPAIR = 5; << 166 G4int nbiny;
171 static const G4int NINTPAIR = 8; << 167 size_t nmaxElements;
172 static const G4int ZDATPAIR[NZDATPAIR]; << 168 static G4double zdat[5],adat[5],tdat[8],xgi[8],wgi[8];
173 static const G4double xgi[NINTPAIR]; << 169 G4double ya[1001],proba[5][8][1001];
174 static const G4double wgi[NINTPAIR]; << 170
175 << 171 G4double ymin;
176 private: << 172 G4double ymax;
>> 173 G4double dy;
177 174
178 G4ParticleDefinition* theElectron; << 175 G4bool samplingTablesAreFilled;
179 G4ParticleDefinition* thePositron; << 176 std::vector<G4double> partialSum;
180 G4String dataName{""}; <<
181 }; 177 };
182 178
183 //....oooOO0OOooo........oooOO0OOooo........oo 179 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
184 180
185 inline void G4MuPairProductionModel::SetLowest << 181 inline G4double G4MuPairProductionModel::MaxSecondaryEnergy(
>> 182 const G4ParticleDefinition*,
>> 183 G4double kineticEnergy)
186 { 184 {
187 lowestKinEnergy = e; << 185 G4double maxPairEnergy = kineticEnergy + particleMass*(1.0 - 0.75*sqrte*z13);
>> 186 return maxPairEnergy;
188 } 187 }
189 188
190 //....oooOO0OOooo........oooOO0OOooo........oo 189 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
191 190
192 inline << 191 inline void G4MuPairProductionModel::SetCurrentElement(G4double Z)
193 void G4MuPairProductionModel::SetParticle(cons <<
194 { 192 {
195 if(nullptr == particle) { << 193 if(Z != currentZ) {
196 particle = p; << 194 currentZ = Z;
197 particleMass = particle->GetPDGMass(); << 195 z13 = std::pow(Z,0.333333333);
>> 196 z23 = z13*z13;
>> 197 lnZ = std::log(Z);
198 } 198 }
199 } 199 }
200 200
201 //....oooOO0OOooo........oooOO0OOooo........oo 201 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
202 202
203 inline G4double << 203 inline G4double G4MuPairProductionModel::InterpolatedIntegralCrossSection(
204 G4MuPairProductionModel::MaxSecondaryEnergyFor << 204 G4double dt, G4double dz,
205 G4double ZZ) << 205 G4int iz, G4int it, G4int iy, G4double z)
206 { 206 {
207 G4int Z = G4lrint(ZZ); << 207 G4double fac = 1./(zdat[iz] *(zdat[iz] +1.));
208 if(Z != currentZ) { << 208 G4double fac1 = 1./(zdat[iz-1]*(zdat[iz-1]+1.));
209 currentZ = Z; << 209 G4double f0 = fac1*proba[iz-1][it-1][iy] +
210 z13 = nist->GetZ13(Z); << 210 (fac*proba[iz][it-1][iy]-fac1*proba[iz-1][it-1][iy])*dz;
211 z23 = z13*z13; << 211 G4double f1 = fac1*proba[iz-1][it ][iy] +
212 lnZ = nist->GetLOGZ(Z); << 212 (fac*proba[iz][it ][iy]-fac1*proba[iz-1][it ][iy])*dz;
213 } << 213 return (f0 + (f1-f0)*dt)*z*(z+1.);
214 return kineticEnergy + particleMass*(1.0 - 0 <<
215 } 214 }
216 215
217 //....oooOO0OOooo........oooOO0OOooo........oo 216 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
218 217
219 #endif 218 #endif
220 219