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

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Diff markup

Differences between /processes/electromagnetic/standard/include/G4WentzelOKandVIxSection.hh (Version 11.3.0) and /processes/electromagnetic/standard/include/G4WentzelOKandVIxSection.hh (Version 10.7.p2)


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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 #include "G4Threading.hh"
 66                                                    67 
 67 class G4ParticleDefinition;                        68 class G4ParticleDefinition;
 68 class G4ScreeningMottCrossSection;                 69 class G4ScreeningMottCrossSection;
 69                                                    70 
 70 //....oooOO0OOooo........oooOO0OOooo........oo     71 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 71                                                    72 
 72 class G4WentzelOKandVIxSection                     73 class G4WentzelOKandVIxSection 
 73 {                                                  74 {
 74                                                    75 
 75 public:                                            76 public:
 76                                                    77 
 77   explicit G4WentzelOKandVIxSection(G4bool com <<  78   explicit G4WentzelOKandVIxSection(G4bool comb=true);
 78                                                    79 
 79   virtual ~G4WentzelOKandVIxSection();             80   virtual ~G4WentzelOKandVIxSection();
 80                                                    81 
 81   void Initialise(const G4ParticleDefinition*,     82   void Initialise(const G4ParticleDefinition*, G4double CosThetaLim);
 82                                                    83 
 83   void SetupParticle(const G4ParticleDefinitio     84   void SetupParticle(const G4ParticleDefinition*);
 84                                                    85 
 85   // return cos(ThetaMax) for msc and cos(thet     86   // return cos(ThetaMax) for msc and cos(thetaMin) for single scattering
 86   // cut = DBL_MAX means no scattering off ele     87   // cut = DBL_MAX means no scattering off electrons 
 87   virtual G4double SetupKinematic(G4double kin <<  88   G4double SetupKinematic(G4double kinEnergy, const G4Material* mat);
 88   G4double SetupTarget(G4int Z, G4double cut);     89   G4double SetupTarget(G4int Z, G4double cut);
 89                                                    90 
 90   G4double ComputeTransportCrossSectionPerAtom     91   G4double ComputeTransportCrossSectionPerAtom(G4double CosThetaMax);
 91                                                    92  
 92   G4ThreeVector& SampleSingleScattering(G4doub     93   G4ThreeVector& SampleSingleScattering(G4double CosThetaMin,
 93           G4double CosThetaMax,                    94           G4double CosThetaMax,
 94           G4double elecRatio);                     95           G4double elecRatio);
 95                                                    96 
 96   G4double ComputeSecondTransportMoment(G4doub     97   G4double ComputeSecondTransportMoment(G4double CosThetaMax);
 97                                                    98 
 98   inline G4double ComputeNuclearCrossSection(G     99   inline G4double ComputeNuclearCrossSection(G4double CosThetaMin,
 99                G4double CosThetaMax);             100                G4double CosThetaMax);
100                                                   101  
101   inline G4double ComputeElectronCrossSection(    102   inline G4double ComputeElectronCrossSection(G4double CosThetaMin,
102                 G4double CosThetaMax);            103                 G4double CosThetaMax);
103                                                   104    
104   inline void SetTargetMass(G4double value);      105   inline void SetTargetMass(G4double value);
105                                                   106 
106   inline G4double GetMomentumSquare() const;      107   inline G4double GetMomentumSquare() const;
107                                                   108 
108   inline G4double GetCosThetaNuc() const;         109   inline G4double GetCosThetaNuc() const;
109                                                   110 
110   inline G4double GetCosThetaElec() const;        111   inline G4double GetCosThetaElec() const;
111                                                   112 
112   //  hide assignment operator                    113   //  hide assignment operator
113   G4WentzelOKandVIxSection & operator=            114   G4WentzelOKandVIxSection & operator=
114   (const G4WentzelOKandVIxSection &right) = de    115   (const G4WentzelOKandVIxSection &right) = delete;
115   G4WentzelOKandVIxSection(const  G4WentzelOKa    116   G4WentzelOKandVIxSection(const  G4WentzelOKandVIxSection&) = delete;
116                                                   117 
117 protected:                                        118 protected:
118                                                   119 
119   void ComputeMaxElectronScattering(G4double c    120   void ComputeMaxElectronScattering(G4double cut);
120                                                   121 
121   void InitialiseA();                             122   void InitialiseA();
122                                                   123 
123   inline G4double FlatFormfactor(G4double x);     124   inline G4double FlatFormfactor(G4double x);
124                                                   125 
125   const G4ParticleDefinition* theProton;          126   const G4ParticleDefinition* theProton;
126   const G4ParticleDefinition* theElectron;        127   const G4ParticleDefinition* theElectron;
127   const G4ParticleDefinition* thePositron;        128   const G4ParticleDefinition* thePositron;
128   const G4ParticleDefinition* particle = nullp << 129   const G4Material* currentMaterial;
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;
135                                                   135 
136   G4ThreeVector temp;                          << 136   G4ThreeVector   temp;
137                                                   137 
138   // single scattering parameters              << 138   G4double numlimit;
139   G4double coeff;                              << 
140   G4double cosTetMaxElec = 1.0;                << 
141   G4double cosTetMaxNuc = 1.0;                 << 
142                                                   139 
143   // for the combined mode it is cos(thetaMax) << 140   // integer parameters
144   // for single scattering it is cos(thetaMin) << 141   G4int    nwarnings;
145   G4double cosThetaMax = 1.0;                  << 142   G4int    nwarnlimit;
146                                                << 
147   G4double chargeSquare = 0.0;                 << 
148   G4double charge3 = 0.0;                      << 
149   G4double spin = 0.0;                         << 
150   G4double mass = 0.0;                         << 
151   G4double tkin = 0.0;                         << 
152   G4double mom2 = 0.0;                         << 
153   G4double momCM2 = 0.0;                       << 
154   G4double invbeta2 = 1.0;                     << 
155   G4double kinFactor = 1.0;                    << 
156   G4double etag = DBL_MAX;                     << 
157   G4double ecut = DBL_MAX;                     << 
158                                                   143 
159   // target                                    << 144   G4NuclearFormfactorType fNucFormfactor;
160   G4double targetMass;                         << 
161   G4double screenZ = 0.0;                      << 
162   G4double formfactA = 0.0;                    << 
163   G4double factorA2 = 0.0;                     << 
164   G4double factB = 0.0;                        << 
165   G4double factD = 0.0;                        << 
166   G4double fMottFactor = 1.0;                  << 
167   G4double gam0pcmp = 1.0;                     << 
168   G4double pcmp2 = 1.0;                        << 
169                                                   145 
170   // integer parameters                        << 146   G4bool   isCombined;
171   G4int targetZ = 0;                           << 
172   G4int nwarnings = 0;                         << 
173                                                   147 
174   G4NuclearFormfactorType fNucFormfactor = fEx << 148   // single scattering parameters
                                                   >> 149   G4double coeff;
                                                   >> 150   G4double cosTetMaxElec;
                                                   >> 151   G4double cosTetMaxNuc;
                                                   >> 152   G4double cosThetaMax;
                                                   >> 153   G4double alpha2;
                                                   >> 154 
                                                   >> 155   // projectile
                                                   >> 156   const G4ParticleDefinition* particle;
                                                   >> 157 
                                                   >> 158   G4double chargeSquare;
                                                   >> 159   G4double charge3;
                                                   >> 160   G4double spin;
                                                   >> 161   G4double mass;
                                                   >> 162   G4double tkin;
                                                   >> 163   G4double mom2;
                                                   >> 164   G4double momCM2;
                                                   >> 165   G4double invbeta2;
                                                   >> 166   G4double kinFactor;
                                                   >> 167   G4double etag;
                                                   >> 168   G4double ecut;
                                                   >> 169   G4double lowEnergyLimit;
175                                                   170 
176   G4bool isCombined;                           << 171   // target
                                                   >> 172   G4int    targetZ;
                                                   >> 173   G4double targetMass;
                                                   >> 174   G4double screenZ;
                                                   >> 175   G4double formfactA;
                                                   >> 176   G4double factorA2;
                                                   >> 177   G4double factB;
                                                   >> 178   G4double factB1;
                                                   >> 179   G4double factD;
                                                   >> 180   G4double fMottFactor;
                                                   >> 181   G4double gam0pcmp;
                                                   >> 182   G4double pcmp2;
177                                                   183 
178   static G4double ScreenRSquareElec[100];         184   static G4double ScreenRSquareElec[100];
179   static G4double ScreenRSquare[100];             185   static G4double ScreenRSquare[100];
180   static G4double FormFactor[100];                186   static G4double FormFactor[100];
                                                   >> 187 
                                                   >> 188 #ifdef G4MULTITHREADED
                                                   >> 189   static G4Mutex WentzelOKandVIxSectionMutex;
                                                   >> 190 #endif
                                                   >> 191 
181 };                                                192 };
182                                                   193 
183 //....oooOO0OOooo........oooOO0OOooo........oo    194 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
184                                                   195 
185 inline void G4WentzelOKandVIxSection::SetTarge    196 inline void G4WentzelOKandVIxSection::SetTargetMass(G4double value)
186 {                                                 197 {
187   targetMass = value;                             198   targetMass = value;
188   factD = std::sqrt(mom2)/value;                  199   factD = std::sqrt(mom2)/value;
189 }                                                 200 }
190                                                   201 
191 //....oooOO0OOooo........oooOO0OOooo........oo    202 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
192                                                   203 
193 inline G4double G4WentzelOKandVIxSection::GetM    204 inline G4double G4WentzelOKandVIxSection::GetMomentumSquare() const
194 {                                                 205 {
195   return mom2;                                    206   return mom2;
196 }                                                 207 }
197                                                   208 
198 //....oooOO0OOooo........oooOO0OOooo........oo    209 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
199                                                   210 
200 inline G4double G4WentzelOKandVIxSection::GetC    211 inline G4double G4WentzelOKandVIxSection::GetCosThetaNuc() const
201 {                                                 212 {
202   return cosTetMaxNuc;                            213   return cosTetMaxNuc;
203 }                                                 214 }
204                                                   215 
205 //....oooOO0OOooo........oooOO0OOooo........oo    216 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
206                                                   217 
207 inline G4double G4WentzelOKandVIxSection::GetC    218 inline G4double G4WentzelOKandVIxSection::GetCosThetaElec() const
208 {                                                 219 {
209   return cosTetMaxElec;                           220   return cosTetMaxElec;
210 }                                                 221 }
211                                                   222 
212 //....oooOO0OOooo........oooOO0OOooo........oo    223 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
213                                                   224 
214 inline G4double                                   225 inline G4double 
215 G4WentzelOKandVIxSection::ComputeNuclearCrossS    226 G4WentzelOKandVIxSection::ComputeNuclearCrossSection(G4double cosTMin,
216                  G4double cosTMax)                227                  G4double cosTMax)
217 {                                                 228 {
218   return targetZ*kinFactor*fMottFactor*(cosTMi    229   return targetZ*kinFactor*fMottFactor*(cosTMin - cosTMax)/
219     ((1.0 - cosTMin + screenZ)*(1.0 - cosTMax     230     ((1.0 - cosTMin + screenZ)*(1.0 - cosTMax + screenZ));
220 }                                                 231 }
221                                                   232 
222 //....oooOO0OOooo........oooOO0OOooo........oo    233 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
223                                                   234 
224 inline G4double                                   235 inline G4double 
225 G4WentzelOKandVIxSection::ComputeElectronCross    236 G4WentzelOKandVIxSection::ComputeElectronCrossSection(G4double cosTMin,
226                   G4double cosTMax)               237                   G4double cosTMax)
227 {                                                 238 {
228   G4double cost1 = std::max(cosTMin,cosTetMaxE    239   G4double cost1 = std::max(cosTMin,cosTetMaxElec);
229   G4double cost2 = std::max(cosTMax,cosTetMaxE    240   G4double cost2 = std::max(cosTMax,cosTetMaxElec);
230   return (cost1 <= cost2) ? 0.0 : kinFactor*fM    241   return (cost1 <= cost2) ? 0.0 : kinFactor*fMottFactor*(cost1 - cost2)/
231     ((1.0 - cost1 + screenZ)*(1.0 - cost2 + sc    242     ((1.0 - cost1 + screenZ)*(1.0 - cost2 + screenZ));
232 }                                                 243 }
233                                                   244 
234 inline G4double G4WentzelOKandVIxSection::Flat    245 inline G4double G4WentzelOKandVIxSection::FlatFormfactor(G4double x)
235 {                                                 246 {
236   return 3.0*(std::sin(x) - x*std::cos(x))/(x*    247   return 3.0*(std::sin(x) - x*std::cos(x))/(x*x*x);
237 }                                                 248 }
238                                                   249 
239 //....oooOO0OOooo........oooOO0OOooo........oo    250 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
240                                                   251 
241 #endif                                            252 #endif
242                                                   253 
243                                                   254