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Geant4/processes/electromagnetic/standard/include/G4WentzelOKandVIxSection.hh

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Differences between /processes/electromagnetic/standard/include/G4WentzelOKandVIxSection.hh (Version 11.3.0) and /processes/electromagnetic/standard/include/G4WentzelOKandVIxSection.hh (Version 11.2.1)


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 25 //                                                 25 //
 26 //                                                 26 //
 27 // -------------------------------------------     27 // -------------------------------------------------------------------
 28 //                                                 28 //
 29 //                                                 29 //
 30 // GEANT4 Class header file                        30 // GEANT4 Class header file
 31 //                                                 31 //
 32 //                                                 32 //
 33 // File name:     G4WentzelOKandVIxSection         33 // File name:     G4WentzelOKandVIxSection
 34 //                                                 34 //
 35 // Authors:       V.Ivanchenko and O.Kadri         35 // Authors:       V.Ivanchenko and O.Kadri 
 36 //                                                 36 //
 37 // Creation date: 21.05.2010                       37 // Creation date: 21.05.2010 
 38 //                                                 38 //
 39 // Modifications:                                  39 // Modifications:
 40 //                                                 40 //
 41 //                                                 41 //
 42 // Class Description:                              42 // Class Description:
 43 //                                                 43 //
 44 // Implementation of the computation of total      44 // Implementation of the computation of total and transport cross sections,
 45 // sample scattering angle for the single scat     45 // sample scattering angle for the single scattering case.
 46 // to be used by single and multiple scatterin     46 // to be used by single and multiple scattering models. References:
 47 // 1) G.Wentzel, Z. Phys. 40 (1927) 590.           47 // 1) G.Wentzel, Z. Phys. 40 (1927) 590.
 48 // 2) J.M. Fernandez-Varea et al., NIM B73 (19     48 // 2) J.M. Fernandez-Varea et al., NIM B73 (1993) 447.
 49 //                                                 49 //
 50 // -------------------------------------------     50 // -------------------------------------------------------------------
 51 //                                                 51 //
 52                                                    52 
 53 #ifndef G4WentzelOKandVIxSection_h                 53 #ifndef G4WentzelOKandVIxSection_h
 54 #define G4WentzelOKandVIxSection_h 1               54 #define G4WentzelOKandVIxSection_h 1
 55                                                    55 
 56 //....oooOO0OOooo........oooOO0OOooo........oo     56 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 57                                                    57 
 58 #include "globals.hh"                              58 #include "globals.hh"
 59 #include "G4Material.hh"                           59 #include "G4Material.hh"
 60 #include "G4Element.hh"                            60 #include "G4Element.hh"
 61 #include "G4ElementVector.hh"                      61 #include "G4ElementVector.hh"
 62 #include "G4NistManager.hh"                        62 #include "G4NistManager.hh"
 63 #include "G4NuclearFormfactorType.hh"              63 #include "G4NuclearFormfactorType.hh"
 64 #include "G4ThreeVector.hh"                        64 #include "G4ThreeVector.hh"
 65 #include "G4Pow.hh"                                65 #include "G4Pow.hh"
 66                                                    66 
 67 class G4ParticleDefinition;                        67 class G4ParticleDefinition;
 68 class G4ScreeningMottCrossSection;                 68 class G4ScreeningMottCrossSection;
 69                                                    69 
 70 //....oooOO0OOooo........oooOO0OOooo........oo     70 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 71                                                    71 
 72 class G4WentzelOKandVIxSection                     72 class G4WentzelOKandVIxSection 
 73 {                                                  73 {
 74                                                    74 
 75 public:                                            75 public:
 76                                                    76 
 77   explicit G4WentzelOKandVIxSection(G4bool com     77   explicit G4WentzelOKandVIxSection(G4bool combined=true);
 78                                                    78 
 79   virtual ~G4WentzelOKandVIxSection();             79   virtual ~G4WentzelOKandVIxSection();
 80                                                    80 
 81   void Initialise(const G4ParticleDefinition*,     81   void Initialise(const G4ParticleDefinition*, G4double CosThetaLim);
 82                                                    82 
 83   void SetupParticle(const G4ParticleDefinitio     83   void SetupParticle(const G4ParticleDefinition*);
 84                                                    84 
 85   // return cos(ThetaMax) for msc and cos(thet     85   // return cos(ThetaMax) for msc and cos(thetaMin) for single scattering
 86   // cut = DBL_MAX means no scattering off ele     86   // cut = DBL_MAX means no scattering off electrons 
 87   virtual G4double SetupKinematic(G4double kin     87   virtual G4double SetupKinematic(G4double kinEnergy, const G4Material* mat);
 88   G4double SetupTarget(G4int Z, G4double cut);     88   G4double SetupTarget(G4int Z, G4double cut);
 89                                                    89 
 90   G4double ComputeTransportCrossSectionPerAtom     90   G4double ComputeTransportCrossSectionPerAtom(G4double CosThetaMax);
 91                                                    91  
 92   G4ThreeVector& SampleSingleScattering(G4doub     92   G4ThreeVector& SampleSingleScattering(G4double CosThetaMin,
 93           G4double CosThetaMax,                    93           G4double CosThetaMax,
 94           G4double elecRatio);                     94           G4double elecRatio);
 95                                                    95 
 96   G4double ComputeSecondTransportMoment(G4doub     96   G4double ComputeSecondTransportMoment(G4double CosThetaMax);
 97                                                    97 
 98   inline G4double ComputeNuclearCrossSection(G     98   inline G4double ComputeNuclearCrossSection(G4double CosThetaMin,
 99                G4double CosThetaMax);              99                G4double CosThetaMax);
100                                                   100  
101   inline G4double ComputeElectronCrossSection(    101   inline G4double ComputeElectronCrossSection(G4double CosThetaMin,
102                 G4double CosThetaMax);            102                 G4double CosThetaMax);
103                                                   103    
104   inline void SetTargetMass(G4double value);      104   inline void SetTargetMass(G4double value);
105                                                   105 
106   inline G4double GetMomentumSquare() const;      106   inline G4double GetMomentumSquare() const;
107                                                   107 
108   inline G4double GetCosThetaNuc() const;         108   inline G4double GetCosThetaNuc() const;
109                                                   109 
110   inline G4double GetCosThetaElec() const;        110   inline G4double GetCosThetaElec() const;
111                                                   111 
112   //  hide assignment operator                    112   //  hide assignment operator
113   G4WentzelOKandVIxSection & operator=            113   G4WentzelOKandVIxSection & operator=
114   (const G4WentzelOKandVIxSection &right) = de    114   (const G4WentzelOKandVIxSection &right) = delete;
115   G4WentzelOKandVIxSection(const  G4WentzelOKa    115   G4WentzelOKandVIxSection(const  G4WentzelOKandVIxSection&) = delete;
116                                                   116 
117 protected:                                        117 protected:
118                                                   118 
119   void ComputeMaxElectronScattering(G4double c    119   void ComputeMaxElectronScattering(G4double cut);
120                                                   120 
121   void InitialiseA();                             121   void InitialiseA();
122                                                   122 
123   inline G4double FlatFormfactor(G4double x);     123   inline G4double FlatFormfactor(G4double x);
124                                                   124 
125   const G4ParticleDefinition* theProton;          125   const G4ParticleDefinition* theProton;
126   const G4ParticleDefinition* theElectron;        126   const G4ParticleDefinition* theElectron;
127   const G4ParticleDefinition* thePositron;        127   const G4ParticleDefinition* thePositron;
128   const G4ParticleDefinition* particle = nullp    128   const G4ParticleDefinition* particle = nullptr;
129   const G4Material* currentMaterial = nullptr;    129   const G4Material* currentMaterial = nullptr;
130                                                   130 
131   G4NistManager* fNistManager;                    131   G4NistManager* fNistManager;
132   G4Pow*         fG4pow;                          132   G4Pow*         fG4pow;
133                                                   133 
134   G4ScreeningMottCrossSection* fMottXSection =    134   G4ScreeningMottCrossSection* fMottXSection = nullptr;
135                                                   135 
136   G4ThreeVector temp;                             136   G4ThreeVector temp;
137                                                   137 
138   // single scattering parameters                 138   // single scattering parameters
139   G4double coeff;                                 139   G4double coeff;
140   G4double cosTetMaxElec = 1.0;                   140   G4double cosTetMaxElec = 1.0;
141   G4double cosTetMaxNuc = 1.0;                    141   G4double cosTetMaxNuc = 1.0;
142                                                   142 
143   // for the combined mode it is cos(thetaMax)    143   // for the combined mode it is cos(thetaMax)
144   // for single scattering it is cos(thetaMin)    144   // for single scattering it is cos(thetaMin)
145   G4double cosThetaMax = 1.0;                     145   G4double cosThetaMax = 1.0;
146                                                   146 
147   G4double chargeSquare = 0.0;                    147   G4double chargeSquare = 0.0;
148   G4double charge3 = 0.0;                         148   G4double charge3 = 0.0;
149   G4double spin = 0.0;                            149   G4double spin = 0.0;
150   G4double mass = 0.0;                            150   G4double mass = 0.0;
151   G4double tkin = 0.0;                            151   G4double tkin = 0.0;
152   G4double mom2 = 0.0;                            152   G4double mom2 = 0.0;
153   G4double momCM2 = 0.0;                          153   G4double momCM2 = 0.0;
154   G4double invbeta2 = 1.0;                        154   G4double invbeta2 = 1.0;
155   G4double kinFactor = 1.0;                       155   G4double kinFactor = 1.0;
156   G4double etag = DBL_MAX;                        156   G4double etag = DBL_MAX;
157   G4double ecut = DBL_MAX;                        157   G4double ecut = DBL_MAX;
158                                                   158 
159   // target                                       159   // target
160   G4double targetMass;                            160   G4double targetMass;
161   G4double screenZ = 0.0;                         161   G4double screenZ = 0.0;
162   G4double formfactA = 0.0;                       162   G4double formfactA = 0.0;
163   G4double factorA2 = 0.0;                        163   G4double factorA2 = 0.0;
164   G4double factB = 0.0;                           164   G4double factB = 0.0;
165   G4double factD = 0.0;                           165   G4double factD = 0.0;
166   G4double fMottFactor = 1.0;                     166   G4double fMottFactor = 1.0;
167   G4double gam0pcmp = 1.0;                        167   G4double gam0pcmp = 1.0;
168   G4double pcmp2 = 1.0;                           168   G4double pcmp2 = 1.0;
169                                                   169 
170   // integer parameters                           170   // integer parameters
171   G4int targetZ = 0;                              171   G4int targetZ = 0;
172   G4int nwarnings = 0;                            172   G4int nwarnings = 0;
173                                                   173 
174   G4NuclearFormfactorType fNucFormfactor = fEx    174   G4NuclearFormfactorType fNucFormfactor = fExponentialNF;
175                                                   175 
176   G4bool isCombined;                              176   G4bool isCombined;
177                                                   177 
178   static G4double ScreenRSquareElec[100];         178   static G4double ScreenRSquareElec[100];
179   static G4double ScreenRSquare[100];             179   static G4double ScreenRSquare[100];
180   static G4double FormFactor[100];                180   static G4double FormFactor[100];
181 };                                                181 };
182                                                   182 
183 //....oooOO0OOooo........oooOO0OOooo........oo    183 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
184                                                   184 
185 inline void G4WentzelOKandVIxSection::SetTarge    185 inline void G4WentzelOKandVIxSection::SetTargetMass(G4double value)
186 {                                                 186 {
187   targetMass = value;                             187   targetMass = value;
188   factD = std::sqrt(mom2)/value;                  188   factD = std::sqrt(mom2)/value;
189 }                                                 189 }
190                                                   190 
191 //....oooOO0OOooo........oooOO0OOooo........oo    191 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
192                                                   192 
193 inline G4double G4WentzelOKandVIxSection::GetM    193 inline G4double G4WentzelOKandVIxSection::GetMomentumSquare() const
194 {                                                 194 {
195   return mom2;                                    195   return mom2;
196 }                                                 196 }
197                                                   197 
198 //....oooOO0OOooo........oooOO0OOooo........oo    198 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
199                                                   199 
200 inline G4double G4WentzelOKandVIxSection::GetC    200 inline G4double G4WentzelOKandVIxSection::GetCosThetaNuc() const
201 {                                                 201 {
202   return cosTetMaxNuc;                            202   return cosTetMaxNuc;
203 }                                                 203 }
204                                                   204 
205 //....oooOO0OOooo........oooOO0OOooo........oo    205 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
206                                                   206 
207 inline G4double G4WentzelOKandVIxSection::GetC    207 inline G4double G4WentzelOKandVIxSection::GetCosThetaElec() const
208 {                                                 208 {
209   return cosTetMaxElec;                           209   return cosTetMaxElec;
210 }                                                 210 }
211                                                   211 
212 //....oooOO0OOooo........oooOO0OOooo........oo    212 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
213                                                   213 
214 inline G4double                                   214 inline G4double 
215 G4WentzelOKandVIxSection::ComputeNuclearCrossS    215 G4WentzelOKandVIxSection::ComputeNuclearCrossSection(G4double cosTMin,
216                  G4double cosTMax)                216                  G4double cosTMax)
217 {                                                 217 {
218   return targetZ*kinFactor*fMottFactor*(cosTMi    218   return targetZ*kinFactor*fMottFactor*(cosTMin - cosTMax)/
219     ((1.0 - cosTMin + screenZ)*(1.0 - cosTMax     219     ((1.0 - cosTMin + screenZ)*(1.0 - cosTMax + screenZ));
220 }                                                 220 }
221                                                   221 
222 //....oooOO0OOooo........oooOO0OOooo........oo    222 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
223                                                   223 
224 inline G4double                                   224 inline G4double 
225 G4WentzelOKandVIxSection::ComputeElectronCross    225 G4WentzelOKandVIxSection::ComputeElectronCrossSection(G4double cosTMin,
226                   G4double cosTMax)               226                   G4double cosTMax)
227 {                                                 227 {
228   G4double cost1 = std::max(cosTMin,cosTetMaxE    228   G4double cost1 = std::max(cosTMin,cosTetMaxElec);
229   G4double cost2 = std::max(cosTMax,cosTetMaxE    229   G4double cost2 = std::max(cosTMax,cosTetMaxElec);
230   return (cost1 <= cost2) ? 0.0 : kinFactor*fM    230   return (cost1 <= cost2) ? 0.0 : kinFactor*fMottFactor*(cost1 - cost2)/
231     ((1.0 - cost1 + screenZ)*(1.0 - cost2 + sc    231     ((1.0 - cost1 + screenZ)*(1.0 - cost2 + screenZ));
232 }                                                 232 }
233                                                   233 
234 inline G4double G4WentzelOKandVIxSection::Flat    234 inline G4double G4WentzelOKandVIxSection::FlatFormfactor(G4double x)
235 {                                                 235 {
236   return 3.0*(std::sin(x) - x*std::cos(x))/(x*    236   return 3.0*(std::sin(x) - x*std::cos(x))/(x*x*x);
237 }                                                 237 }
238                                                   238 
239 //....oooOO0OOooo........oooOO0OOooo........oo    239 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
240                                                   240 
241 #endif                                            241 #endif
242                                                   242 
243                                                   243