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25 // 22 //
>> 23 // $Id: G4MuPairProductionModel.hh,v 1.18 2005/08/04 08:19:04 vnivanch Exp $
>> 24 // GEANT4 tag $Name: geant4-08-00 $
26 // 25 //
27 // ------------------------------------------- 26 // -------------------------------------------------------------------
28 // 27 //
29 // GEANT4 Class header file 28 // GEANT4 Class header file
30 // 29 //
31 // 30 //
32 // File name: G4MuPairProductionModel 31 // File name: G4MuPairProductionModel
33 // 32 //
34 // Author: Vladimir Ivanchenko on base 33 // Author: Vladimir Ivanchenko on base of Laszlo Urban code
35 // 34 //
36 // Creation date: 18.05.2002 35 // Creation date: 18.05.2002
37 // 36 //
38 // Modifications: 37 // Modifications:
39 // 38 //
40 // 23-12-02 Change interface in order to move 39 // 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 40 // 27-01-03 Make models region aware (V.Ivanchenko)
42 // 13-02-03 Add name (V.Ivanchenko) 41 // 13-02-03 Add name (V.Ivanchenko)
43 // 10-02-04 Update parameterisation using R.Ko 42 // 10-02-04 Update parameterisation using R.Kokoulin model (V.Ivanchenko)
44 // 10-02-04 Add lowestKinEnergy (V.Ivanchenko) 43 // 10-02-04 Add lowestKinEnergy (V.Ivanchenko)
45 // 13-02-06 Add ComputeCrossSectionPerAtom (mm << 44 //
46 // 12-05-06 Add parameter to SelectRandomAtom << 45
47 // 11-10-07 Add ignoreCut flag (V.Ivanchenko) <<
48 // 28-02-08 Reorganized protected methods and <<
49 // 46 //
50 // Class Description: 47 // Class Description:
51 // 48 //
52 // Implementation of e+e- pair production by m 49 // 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 // 50 //
>> 51
56 // ------------------------------------------- 52 // -------------------------------------------------------------------
57 // 53 //
58 54
59 #ifndef G4MuPairProductionModel_h 55 #ifndef G4MuPairProductionModel_h
60 #define G4MuPairProductionModel_h 1 56 #define G4MuPairProductionModel_h 1
61 57
62 #include "G4VEmModel.hh" 58 #include "G4VEmModel.hh"
63 #include "G4NistManager.hh" <<
64 #include "G4ElementData.hh" <<
65 #include "G4Physics2DVector.hh" <<
66 #include <vector> 59 #include <vector>
67 60
68 class G4Element; 61 class G4Element;
69 class G4ParticleChangeForLoss; 62 class G4ParticleChangeForLoss;
70 class G4ParticleChangeForGamma; <<
71 63
72 class G4MuPairProductionModel : public G4VEmMo 64 class G4MuPairProductionModel : public G4VEmModel
73 { 65 {
>> 66
74 public: 67 public:
75 68
76 explicit G4MuPairProductionModel(const G4Par << 69 G4MuPairProductionModel(const G4ParticleDefinition* p = 0, const G4String& nam = "MuPairProd");
77 const G4Str << 70
>> 71 virtual ~G4MuPairProductionModel();
>> 72
>> 73 void SetParticle(const G4ParticleDefinition*);
>> 74
>> 75 void Initialise(const G4ParticleDefinition*, const G4DataVector&);
>> 76
>> 77 void SetLowestKineticEnergy(G4double e) {lowestKinEnergy = e;};
78 78
79 ~G4MuPairProductionModel() override = defaul << 79 G4double MinEnergyCut(const G4ParticleDefinition*,
>> 80 const G4MaterialCutsCouple*);
80 81
81 void Initialise(const G4ParticleDefinition*, << 82 G4double ComputeDEDXPerVolume(
>> 83 const G4Material*,
>> 84 const G4ParticleDefinition*,
>> 85 G4double kineticEnergy,
>> 86 G4double cutEnergy);
82 87
83 void InitialiseLocal(const G4ParticleDefinit << 88 G4double CrossSectionPerVolume(
84 G4VEmModel* masterModel << 89 const G4Material*,
85 << 90 const G4ParticleDefinition*,
86 G4double ComputeCrossSectionPerAtom(const G4 << 91 G4double kineticEnergy,
87 G4double kineticEnergy, << 92 G4double cutEnergy,
88 G4double Z, G4double A, << 93 G4double maxEnergy);
89 G4double cutEnergy, << 94
90 G4double maxEnergy) override; << 95 std::vector<G4DynamicParticle*>* SampleSecondaries(
91 << 96 const G4MaterialCutsCouple*,
92 G4double ComputeDEDXPerVolume(const G4Materi << 97 const G4DynamicParticle*,
93 const G4Partic << 98 G4double tmin,
94 G4double kinet << 99 G4double maxEnergy);
95 G4double cutEn <<
96 <<
97 void SampleSecondaries(std::vector<G4Dynamic <<
98 const G4MaterialCutsCouple*, <<
99 const G4DynamicParticle*, <<
100 G4double tmin, <<
101 G4double maxEnergy) override; <<
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 <<
119 100
120 protected: 101 protected:
121 102
122 G4double ComputMuPairLoss(G4double Z, G4doub << 103 G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
123 G4double tmax); << 104 G4double kineticEnergy);
>> 105
>> 106 //private:
>> 107 public:
>> 108
>> 109 G4double ComputMuPairLoss(G4double Z, G4double tkin, G4double cut, G4double tmax);
124 110
125 G4double ComputeMicroscopicCrossSection(G4do 111 G4double ComputeMicroscopicCrossSection(G4double tkin,
126 G4do 112 G4double Z,
127 G4do 113 G4double cut);
128 114
129 G4double FindScaledEnergy(G4int Z, G4double << 115 G4double ComputeDMicroscopicCrossSection(G4double tkin,
130 G4double yymin, G4double yymax); << 116 G4double Z,
>> 117 G4double pairEnergy);
131 118
132 inline G4double MaxSecondaryEnergyForElement << 119 private:
133 G4double Z); <<
134 <<
135 void MakeSamplingTables(); <<
136 120
137 void StoreTables() const; << 121 const G4Element* SelectRandomAtom(G4double kinEnergy, G4double dt, G4int it,
>> 122 const G4MaterialCutsCouple* couple);
138 123
139 G4bool RetrieveTables(); << 124 void MakeSamplingTables();
140 125
141 virtual void DataCorrupted(G4int Z, G4double << 126 void SetCurrentElement(G4double Z);
142 127
143 G4ParticleChangeForLoss* fParticleChange = n << 128 G4double InterpolatedIntegralCrossSection(G4double dt, G4double dz,
144 const G4ParticleDefinition* particle = nullp << 129 G4int iz, G4int it, G4int iy, G4double z);
145 G4NistManager* nist = nullptr; <<
146 130
147 G4double factorForCross; << 131 // hide assignment operator
148 G4double sqrte; << 132 G4MuPairProductionModel & operator=(const G4MuPairProductionModel &right);
149 G4double particleMass = 0.0; << 133 G4MuPairProductionModel(const G4MuPairProductionModel&);
150 G4double z13 = 0.0; << 134
151 G4double z23 = 0.0; << 135 G4ParticleDefinition* theElectron;
152 G4double lnZ = 0.0; << 136 G4ParticleDefinition* thePositron;
>> 137 G4ParticleChangeForLoss* fParticleChange;
153 138
154 G4double minPairEnergy; 139 G4double minPairEnergy;
155 G4double lowestKinEnergy; 140 G4double lowestKinEnergy;
156 141
157 G4double emin; << 142 G4double factorForCross;
158 G4double emax; << 143 G4double sqrte;
159 G4double ymin = -5.0; << 144 G4double particleMass;
160 G4double dy = 0.005; << 145 G4double currentZ;
161 << 146 G4double z13;
162 G4int currentZ = 0; << 147 G4double z23;
163 G4int nYBinPerDecade = 4; << 148 G4double lnZ;
164 std::size_t nbiny = 1000; << 149
165 std::size_t nbine = 0; << 150 const G4ParticleDefinition* particle;
166 << 151
167 G4bool fTableToFile = false; << 152 // tables for sampling
168 << 153 G4int nzdat;
169 // static members << 154 G4int ntdat;
170 static const G4int NZDATPAIR = 5; << 155 G4int nbiny;
171 static const G4int NINTPAIR = 8; << 156 size_t nmaxElements;
172 static const G4int ZDATPAIR[NZDATPAIR]; << 157 static G4double zdat[5],adat[5],tdat[8],xgi[8],wgi[8];
173 static const G4double xgi[NINTPAIR]; << 158 G4double ya[1001],proba[5][8][1001];
174 static const G4double wgi[NINTPAIR]; << 159
175 << 160 G4double ymin;
176 private: << 161 G4double ymax;
>> 162 G4double dy;
177 163
178 G4ParticleDefinition* theElectron; << 164 G4bool samplingTablesAreFilled;
179 G4ParticleDefinition* thePositron; << 165 std::vector<G4double> partialSum;
180 G4String dataName{""}; <<
181 }; 166 };
182 167
183 //....oooOO0OOooo........oooOO0OOooo........oo << 168 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
184 169
185 inline void G4MuPairProductionModel::SetLowest << 170 inline G4double G4MuPairProductionModel::MaxSecondaryEnergy(
>> 171 const G4ParticleDefinition*,
>> 172 G4double kineticEnergy)
186 { 173 {
187 lowestKinEnergy = e; << 174 G4double maxPairEnergy = kineticEnergy + particleMass*(1.0 - 0.75*sqrte*z13);
>> 175 return maxPairEnergy;
188 } 176 }
189 177
190 //....oooOO0OOooo........oooOO0OOooo........oo << 178 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
191 179
192 inline << 180 inline void G4MuPairProductionModel::SetCurrentElement(G4double Z)
193 void G4MuPairProductionModel::SetParticle(cons <<
194 { 181 {
195 if(nullptr == particle) { << 182 if(Z != currentZ) {
196 particle = p; << 183 currentZ = Z;
197 particleMass = particle->GetPDGMass(); << 184 z13 = std::pow(Z,0.333333333);
>> 185 z23 = z13*z13;
>> 186 lnZ = std::log(Z);
198 } 187 }
199 } 188 }
200 189
201 //....oooOO0OOooo........oooOO0OOooo........oo << 190 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
202 191
203 inline G4double << 192 inline G4double G4MuPairProductionModel::InterpolatedIntegralCrossSection(
204 G4MuPairProductionModel::MaxSecondaryEnergyFor << 193 G4double dt, G4double dz,
205 G4double ZZ) << 194 G4int iz, G4int it, G4int iy, G4double z)
206 { 195 {
207 G4int Z = G4lrint(ZZ); << 196 G4double fac = 1./(zdat[iz] *(zdat[iz] +1.));
208 if(Z != currentZ) { << 197 G4double fac1 = 1./(zdat[iz-1]*(zdat[iz-1]+1.));
209 currentZ = Z; << 198 G4double f0 = fac1*proba[iz-1][it-1][iy] +
210 z13 = nist->GetZ13(Z); << 199 (fac*proba[iz][it-1][iy]-fac1*proba[iz-1][it-1][iy])*dz;
211 z23 = z13*z13; << 200 G4double f1 = fac1*proba[iz-1][it ][iy] +
212 lnZ = nist->GetLOGZ(Z); << 201 (fac*proba[iz][it ][iy]-fac1*proba[iz-1][it ][iy])*dz;
213 } << 202 return (f0 + (f1-f0)*dt)*z*(z+1.);
214 return kineticEnergy + particleMass*(1.0 - 0 <<
215 } 203 }
216 204
217 //....oooOO0OOooo........oooOO0OOooo........oo << 205 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
218 206
219 #endif 207 #endif
220 208