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25 // 22 //
>> 23 // $Id: G4MuPairProductionModel.hh,v 1.14 2004/12/02 08:20:37 vnivanch Exp $
>> 24 // GEANT4 tag $Name: geant4-07-00-cand-03 $
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; <<
70 class G4ParticleChangeForGamma; <<
71 62
72 class G4MuPairProductionModel : public G4VEmMo 63 class G4MuPairProductionModel : public G4VEmModel
73 { 64 {
>> 65
74 public: 66 public:
75 67
76 explicit G4MuPairProductionModel(const G4Par << 68 G4MuPairProductionModel(const G4ParticleDefinition* p = 0, const G4String& nam = "MuPairProd");
77 const G4Str << 69
>> 70 virtual ~G4MuPairProductionModel();
>> 71
>> 72 void Initialise(const G4ParticleDefinition*, const G4DataVector&);
>> 73
>> 74 G4double HighEnergyLimit(const G4ParticleDefinition* p);
>> 75
>> 76 G4double LowEnergyLimit(const G4ParticleDefinition* p);
>> 77
>> 78 void SetHighEnergyLimit(G4double e) {highKinEnergy = e;};
>> 79
>> 80 void SetLowEnergyLimit(G4double e) {lowKinEnergy = e;};
78 81
79 ~G4MuPairProductionModel() override = defaul << 82 void SetLowestKineticEnergy(G4double e) {lowestKinEnergy = e;};
80 83
81 void Initialise(const G4ParticleDefinition*, << 84 G4double MinEnergyCut(const G4ParticleDefinition*,
>> 85 const G4MaterialCutsCouple*);
82 86
83 void InitialiseLocal(const G4ParticleDefinit << 87 G4bool IsInCharge(const G4ParticleDefinition*);
84 G4VEmModel* masterModel << 88
85 << 89 G4double ComputeDEDX(const G4MaterialCutsCouple*,
86 G4double ComputeCrossSectionPerAtom(const G4 << 90 const G4ParticleDefinition*,
87 G4double kineticEnergy, << 91 G4double kineticEnergy,
88 G4double Z, G4double A, << 92 G4double cutEnergy);
89 G4double cutEnergy, << 93
90 G4double maxEnergy) override; << 94 G4double CrossSection(const G4MaterialCutsCouple*,
91 << 95 const G4ParticleDefinition*,
92 G4double ComputeDEDXPerVolume(const G4Materi << 96 G4double kineticEnergy,
93 const G4Partic << 97 G4double cutEnergy,
94 G4double kinet << 98 G4double maxEnergy);
95 G4double cutEn << 99
96 << 100 G4DynamicParticle* SampleSecondary(
97 void SampleSecondaries(std::vector<G4Dynamic << 101 const G4MaterialCutsCouple*,
98 const G4MaterialCutsCouple*, << 102 const G4DynamicParticle*,
99 const G4DynamicParticle*, << 103 G4double tmin,
100 G4double tmin, << 104 G4double maxEnergy);
101 G4double maxEnergy) override; << 105
102 << 106 std::vector<G4DynamicParticle*>* SampleSecondaries(
103 G4double MinPrimaryEnergy(const G4Material*, << 107 const G4MaterialCutsCouple*,
104 const G4ParticleDe << 108 const G4DynamicParticle*,
105 G4double) override << 109 G4double tmin,
106 << 110 G4double maxEnergy);
107 virtual G4double << 111
108 ComputeDMicroscopicCrossSection(G4double tki << 112 virtual G4double MaxSecondaryEnergy(
109 G4double pairEnergy); << 113 const G4DynamicParticle* dynParticle);
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 <<
119 114
120 protected: 115 protected:
121 116
122 G4double ComputMuPairLoss(G4double Z, G4doub << 117 virtual G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
123 G4double tmax); << 118 G4double kineticEnergy);
>> 119
>> 120 //private:
>> 121 public:
>> 122
>> 123 G4double ComputMuPairLoss(G4double Z, G4double tkin, G4double cut, G4double tmax);
124 124
125 G4double ComputeMicroscopicCrossSection(G4do 125 G4double ComputeMicroscopicCrossSection(G4double tkin,
126 G4do 126 G4double Z,
127 G4do 127 G4double cut);
128 128
129 G4double FindScaledEnergy(G4int Z, G4double << 129 G4double ComputeDMicroscopicCrossSection(G4double tkin,
130 G4double yymin, G4double yymax); << 130 G4double Z,
>> 131 G4double pairEnergy);
>> 132 private:
131 133
132 inline G4double MaxSecondaryEnergyForElement << 134 const G4Element* SelectRandomAtom(G4double kinEnergy, G4double dt, G4int it,
133 G4double Z); << 135 const G4MaterialCutsCouple* couple);
134 136
135 void MakeSamplingTables(); 137 void MakeSamplingTables();
136 138
137 void StoreTables() const; << 139 void SetCurrentElement(G4double Z);
138 140
139 G4bool RetrieveTables(); << 141 G4double InterpolatedIntegralCrossSection(G4double dt, G4double dz,
>> 142 G4int iz, G4int it, G4int iy, G4double z);
140 143
141 virtual void DataCorrupted(G4int Z, G4double << 144 // hide assignment operator
142 << 145 G4MuPairProductionModel & operator=(const G4MuPairProductionModel &right);
143 G4ParticleChangeForLoss* fParticleChange = n << 146 G4MuPairProductionModel(const G4MuPairProductionModel&);
144 const G4ParticleDefinition* particle = nullp <<
145 G4NistManager* nist = nullptr; <<
146 <<
147 G4double factorForCross; <<
148 G4double sqrte; <<
149 G4double particleMass = 0.0; <<
150 G4double z13 = 0.0; <<
151 G4double z23 = 0.0; <<
152 G4double lnZ = 0.0; <<
153 147
154 G4double minPairEnergy; 148 G4double minPairEnergy;
>> 149 G4double highKinEnergy;
>> 150 G4double lowKinEnergy;
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
166 << 162 const G4ParticleDefinition* particle;
167 G4bool fTableToFile = false; << 163
168 << 164 // tables for sampling
169 // static members << 165 G4int nzdat;
170 static const G4int NZDATPAIR = 5; << 166 G4int ntdat;
171 static const G4int NINTPAIR = 8; << 167 G4int nbiny;
172 static const G4int ZDATPAIR[NZDATPAIR]; << 168 size_t nmaxElements;
173 static const G4double xgi[NINTPAIR]; << 169 static G4double zdat[5],adat[5],tdat[8],xgi[8],wgi[8];
174 static const G4double wgi[NINTPAIR]; << 170 G4double ya[1001],proba[5][8][1001];
175 << 171
176 private: << 172 G4double ymin;
>> 173 G4double ymax;
>> 174 G4double dy;
177 175
178 G4ParticleDefinition* theElectron; << 176 G4bool samplingTablesAreFilled;
179 G4ParticleDefinition* thePositron; << 177 std::vector<G4double> partialSum;
180 G4String dataName{""}; <<
181 }; 178 };
182 179
183 //....oooOO0OOooo........oooOO0OOooo........oo << 180 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
184 181
185 inline void G4MuPairProductionModel::SetLowest << 182 inline
>> 183 G4double G4MuPairProductionModel::MaxSecondaryEnergy(
>> 184 const G4DynamicParticle* dynParticle)
186 { 185 {
187 lowestKinEnergy = e; << 186 G4double e = dynParticle->GetKineticEnergy();
>> 187 G4double maxPairEnergy = e + particleMass*(1.0 - 0.75*sqrte*z13);
>> 188 return maxPairEnergy;
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 G4double G4MuPairProductionModel::MaxSecondaryEnergy(
>> 195 const G4ParticleDefinition*,
>> 196 G4double kineticEnergy)
194 { 197 {
195 if(nullptr == particle) { << 198 G4double maxPairEnergy = kineticEnergy + particleMass*(1.0 - 0.75*sqrte*z13);
196 particle = p; << 199 return maxPairEnergy;
197 particleMass = particle->GetPDGMass(); <<
198 } <<
199 } 200 }
>> 201 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
200 202
201 //....oooOO0OOooo........oooOO0OOooo........oo << 203 inline
202 << 204 void G4MuPairProductionModel::SetCurrentElement(G4double Z)
203 inline G4double <<
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 z13 = std::pow(Z,0.333333333);
211 z23 = z13*z13; 209 z23 = z13*z13;
212 lnZ = nist->GetLOGZ(Z); << 210 lnZ = std::log(Z);
213 } 211 }
214 return kineticEnergy + particleMass*(1.0 - 0 <<
215 } 212 }
216 213
217 //....oooOO0OOooo........oooOO0OOooo........oo << 214 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
>> 215
>> 216 inline
>> 217 G4double G4MuPairProductionModel::InterpolatedIntegralCrossSection(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.);
>> 227 }
>> 228
>> 229
>> 230 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
218 231
219 #endif 232 #endif
220 233