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26 // 26 //
27 // ------------------------------------------- 27 // -------------------------------------------------------------------
28 // 28 //
29 // GEANT4 Class header file 29 // GEANT4 Class header file
30 // 30 //
31 // 31 //
32 // File name: G4eBremsstrahlungRelModel 32 // File name: G4eBremsstrahlungRelModel
33 // extention of standard G4eBre 33 // extention of standard G4eBremsstrahlungModel
34 // 34 //
35 // Author: Andreas Schaelicke 35 // Author: Andreas Schaelicke
36 // 36 //
37 // Creation date: 28.03.2008 37 // Creation date: 28.03.2008
38 // 38 //
39 // Modifications: 39 // Modifications:
40 // 40 //
41 // 15.07.18 introduced data structures to sto 41 // 15.07.18 introduced data structures to store LPM functions and element depen
42 // dent data for faster run-time com 42 // dent data for faster run-time computation (see more in .cc M.Novak)
43 // 43 //
44 // Class Description: 44 // Class Description:
45 // 45 //
46 // Implementation of energy loss for gamma emi 46 // Implementation of energy loss for gamma emission by electrons and
47 // positrons including an improved version of 47 // positrons including an improved version of the LPM effect
48 48
49 // ------------------------------------------- 49 // -------------------------------------------------------------------
50 // 50 //
51 51
52 #ifndef G4eBremsstrahlungRelModel_h 52 #ifndef G4eBremsstrahlungRelModel_h
53 #define G4eBremsstrahlungRelModel_h 1 53 #define G4eBremsstrahlungRelModel_h 1
54 54
55 #include "G4VEmModel.hh" 55 #include "G4VEmModel.hh"
56 #include <memory> <<
57 56
58 class G4ParticleChangeForLoss; 57 class G4ParticleChangeForLoss;
59 58
60 class G4eBremsstrahlungRelModel : public G4VEm 59 class G4eBremsstrahlungRelModel : public G4VEmModel {
61 60
62 public: 61 public:
63 62
64 explicit G4eBremsstrahlungRelModel(const G4P 63 explicit G4eBremsstrahlungRelModel(const G4ParticleDefinition* p=nullptr,
65 const G4S 64 const G4String& nam="eBremLPM");
66 65
67 ~G4eBremsstrahlungRelModel() override; 66 ~G4eBremsstrahlungRelModel() override;
68 67
69 void Initialise(const G4ParticleDefinition*, 68 void Initialise(const G4ParticleDefinition*, const G4DataVector&) override;
70 69
71 void InitialiseLocal(const G4ParticleDefinit 70 void InitialiseLocal(const G4ParticleDefinition*,
72 G4VEmModel* masterModel 71 G4VEmModel* masterModel) override;
73 72
74 G4double ComputeDEDXPerVolume(const G4Materi 73 G4double ComputeDEDXPerVolume(const G4Material*,
75 const G4Partic 74 const G4ParticleDefinition*,
76 G4double ekin, 75 G4double ekin,
77 G4double cutEn 76 G4double cutEnergy) override;
78 77
79 G4double ComputeCrossSectionPerAtom(const G4 78 G4double ComputeCrossSectionPerAtom(const G4ParticleDefinition*,
80 G4double 79 G4double ekin,
81 G4double 80 G4double zet,
82 G4double 81 G4double,
83 G4double 82 G4double cutEnergy,
84 G4double 83 G4double maxEnergy = DBL_MAX) override;
85 84
86 void SampleSecondaries(std::vector<G4Dynamic 85 void SampleSecondaries(std::vector<G4DynamicParticle*>*,
87 const G4MaterialCutsC 86 const G4MaterialCutsCouple*,
88 const G4DynamicPartic 87 const G4DynamicParticle*,
89 G4double cutEnergy, 88 G4double cutEnergy,
90 G4double maxEnergy) o 89 G4double maxEnergy) override;
91 90
92 void SetupForMaterial(const G4ParticleDefini 91 void SetupForMaterial(const G4ParticleDefinition*,
93 const G4Material*, G4d 92 const G4Material*, G4double) override;
94 93
95 G4double MinPrimaryEnergy(const G4Material*, 94 G4double MinPrimaryEnergy(const G4Material*,
96 const G4ParticleDe 95 const G4ParticleDefinition*,
97 G4double cutEnergy 96 G4double cutEnergy) override;
98 97
99 protected: 98 protected:
100 99
101 virtual G4double ComputeDXSectionPerAtom(G4d 100 virtual G4double ComputeDXSectionPerAtom(G4double gammaEnergy);
102 101
103 void SetParticle(const G4ParticleDefinition* 102 void SetParticle(const G4ParticleDefinition* p);
104 103
105 private: 104 private:
106 105
107 G4double ComputeBremLoss(G4double cutEnergy) 106 G4double ComputeBremLoss(G4double cutEnergy);
108 107
109 G4double ComputeXSectionPerAtom(G4double cut 108 G4double ComputeXSectionPerAtom(G4double cutEnergy);
110 109
111 G4double ComputeRelDXSectionPerAtom(G4double 110 G4double ComputeRelDXSectionPerAtom(G4double gammaEnergy);
112 111
113 // init special data per element i.e. per Z 112 // init special data per element i.e. per Z
114 void InitialiseElementData(); 113 void InitialiseElementData();
115 114
116 // methods for initialisation and run-time e 115 // methods for initialisation and run-time evaluation of LPM functions:
117 void InitLPMFunctions(); 116 void InitLPMFunctions();
118 117
119 void ComputeLPMfunctions(G4double& funcXiS, 118 void ComputeLPMfunctions(G4double& funcXiS,
120 G4double& funcGS, 119 G4double& funcGS,
121 G4double& funcPhiS, 120 G4double& funcPhiS,
122 const G4double egam 121 const G4double egamma);
123 122
124 void GetLPMFunctions(G4double& lpmGs, 123 void GetLPMFunctions(G4double& lpmGs,
125 G4double& lpmPhis, 124 G4double& lpmPhis,
126 const G4double ss); 125 const G4double ss);
127 126
128 void ComputeLPMGsPhis(G4double& funcGS, 127 void ComputeLPMGsPhis(G4double& funcGS,
129 G4double& funcPhiS, 128 G4double& funcPhiS,
130 const G4double varShat 129 const G4double varShat);
131 130
132 // for evaluating screening related function 131 // for evaluating screening related functions
133 void ComputeScreeningFunctions(G4double& phi 132 void ComputeScreeningFunctions(G4double& phi1,
134 G4double& phi 133 G4double& phi1m2,
135 G4double& psi 134 G4double& psi1,
136 G4double& psi 135 G4double& psi1m2,
137 const G4doubl 136 const G4double gam,
138 const G4doubl 137 const G4double eps);
139 // hide assignment operator and cctr 138 // hide assignment operator and cctr
140 G4eBremsstrahlungRelModel& operator= 139 G4eBremsstrahlungRelModel& operator=
141 (const G4eBremsstrahlungRelModel& right) = d 140 (const G4eBremsstrahlungRelModel& right) = delete;
142 G4eBremsstrahlungRelModel(const G4eBremsstr 141 G4eBremsstrahlungRelModel(const G4eBremsstrahlungRelModel&) = delete;
143 142
144 private: 143 private:
145 144
146 G4bool fIsUseCompleteSc 145 G4bool fIsUseCompleteScreening = false;
147 G4bool fIsInitializer = <<
148 G4bool fUseLPM = true; <<
149 146
150 protected: 147 protected:
151 148
152 G4bool fIsElectron = tr 149 G4bool fIsElectron = true;
153 G4bool fIsScatOffElectr 150 G4bool fIsScatOffElectron = false;
154 G4bool fIsLPMActive = f 151 G4bool fIsLPMActive = false;
155 // 152 //
156 G4int fCurrentIZ = 0; 153 G4int fCurrentIZ = 0;
157 const G4ParticleDefinition* fPrimaryParticle 154 const G4ParticleDefinition* fPrimaryParticle = nullptr;
158 G4ParticleDefinition* fGammaParticle = 155 G4ParticleDefinition* fGammaParticle = nullptr;
159 G4ParticleChangeForLoss* fParticleChange 156 G4ParticleChangeForLoss* fParticleChange = nullptr;
160 // cash 157 // cash
161 G4double fPrimaryParticle 158 G4double fPrimaryParticleMass = 0.;
162 G4double fPrimaryKinEnerg 159 G4double fPrimaryKinEnergy = 0.;
163 G4double fPrimaryTotalEne 160 G4double fPrimaryTotalEnergy = 0.;
164 G4double fDensityFactor = 161 G4double fDensityFactor = 0.;
165 G4double fDensityCorr = 0 162 G4double fDensityCorr = 0.;
166 G4double fLowestKinEnergy 163 G4double fLowestKinEnergy;
167 // scattering off electrons 164 // scattering off electrons
168 G4double fNucTerm = 0.; 165 G4double fNucTerm = 0.;
169 G4double fSumTerm = 0.; 166 G4double fSumTerm = 0.;
170 167
171 private: 168 private:
172 169
173 // LPM related members 170 // LPM related members
174 G4double fLPMEnergyThresh 171 G4double fLPMEnergyThreshold;
175 G4double fLPMEnergy; 172 G4double fLPMEnergy;
176 173
177 protected: 174 protected:
178 175
179 static const G4double gBremFactor; 176 static const G4double gBremFactor;
180 static const G4double gMigdalConstant; 177 static const G4double gMigdalConstant;
181 178
182 private: 179 private:
183 180
184 static const G4int gMaxZet; 181 static const G4int gMaxZet;
185 // 182 //
186 static const G4double gLPMconstant; 183 static const G4double gLPMconstant;
187 // 184 //
188 static const G4double gXGL[8]; 185 static const G4double gXGL[8];
189 static const G4double gWGL[8]; 186 static const G4double gWGL[8];
190 static const G4double gFelLowZet[8]; 187 static const G4double gFelLowZet[8];
191 static const G4double gFinelLowZet[8]; 188 static const G4double gFinelLowZet[8];
192 // 189 //
193 struct ElementData { 190 struct ElementData {
194 /** @brief \f$ \ln(Z) \f$ */ 191 /** @brief \f$ \ln(Z) \f$ */
195 G4double fLogZ; 192 G4double fLogZ;
196 /** @brief \f$ \ln(Z)/3 + f_c \f$ */ 193 /** @brief \f$ \ln(Z)/3 + f_c \f$ */
197 G4double fFz; 194 G4double fFz;
198 /** @brief \f$ ((Fel-fc)+Finel*invZ)\f$ * 195 /** @brief \f$ ((Fel-fc)+Finel*invZ)\f$ */
199 G4double fZFactor1; 196 G4double fZFactor1;
200 /** @brief \f$ (Fel-fc)\f$ */ 197 /** @brief \f$ (Fel-fc)\f$ */
201 G4double fZFactor11; 198 G4double fZFactor11;
202 /** @brief \f$ (1.0+invZ)/12 \f$ */ 199 /** @brief \f$ (1.0+invZ)/12 \f$ */
203 G4double fZFactor2; 200 G4double fZFactor2;
204 // LPM variables 201 // LPM variables
205 G4double fVarS1; 202 G4double fVarS1;
206 G4double fILVarS1; 203 G4double fILVarS1;
207 G4double fILVarS1Cond; 204 G4double fILVarS1Cond;
208 // constant factors to the screening funct 205 // constant factors to the screening function evaluations
209 G4double fGammaFactor; 206 G4double fGammaFactor;
210 G4double fEpsilonFactor; 207 G4double fEpsilonFactor;
211 }; 208 };
212 // 209 //
213 struct LPMFuncs { 210 struct LPMFuncs {
214 LPMFuncs() : fIsInitialized(false), fISDel 211 LPMFuncs() : fIsInitialized(false), fISDelta(100.), fSLimit(2.) {}
215 G4bool fIsInitialized; 212 G4bool fIsInitialized;
216 G4double fISDelta; 213 G4double fISDelta;
217 G4double fSLimit; 214 G4double fSLimit;
218 std::vector<G4double> fLPMFuncG; 215 std::vector<G4double> fLPMFuncG;
219 std::vector<G4double> fLPMFuncPhi; 216 std::vector<G4double> fLPMFuncPhi;
220 }; 217 };
221 // 218 //
222 static std::shared_ptr<LPMFuncs> gLPMFuncs() << 219 static LPMFuncs gLPMFuncs;
223 static std::shared_ptr<std::vector<ElementDa << 220 static std::vector<ElementData*> gElementData;
224 std::shared_ptr<LPMFuncs> fLPMFuncs; << 221
225 std::shared_ptr<std::vector<ElementData*>> f <<
226 }; 222 };
227 223
228 #endif 224 #endif
229 225