Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/processes/electromagnetic/standard/include/G4BetheHeitlerModel.hh

Version: [ ReleaseNotes ] [ 1.0 ] [ 1.1 ] [ 2.0 ] [ 3.0 ] [ 3.1 ] [ 3.2 ] [ 4.0 ] [ 4.0.p1 ] [ 4.0.p2 ] [ 4.1 ] [ 4.1.p1 ] [ 5.0 ] [ 5.0.p1 ] [ 5.1 ] [ 5.1.p1 ] [ 5.2 ] [ 5.2.p1 ] [ 5.2.p2 ] [ 6.0 ] [ 6.0.p1 ] [ 6.1 ] [ 6.2 ] [ 6.2.p1 ] [ 6.2.p2 ] [ 7.0 ] [ 7.0.p1 ] [ 7.1 ] [ 7.1.p1 ] [ 8.0 ] [ 8.0.p1 ] [ 8.1 ] [ 8.1.p1 ] [ 8.1.p2 ] [ 8.2 ] [ 8.2.p1 ] [ 8.3 ] [ 8.3.p1 ] [ 8.3.p2 ] [ 9.0 ] [ 9.0.p1 ] [ 9.0.p2 ] [ 9.1 ] [ 9.1.p1 ] [ 9.1.p2 ] [ 9.1.p3 ] [ 9.2 ] [ 9.2.p1 ] [ 9.2.p2 ] [ 9.2.p3 ] [ 9.2.p4 ] [ 9.3 ] [ 9.3.p1 ] [ 9.3.p2 ] [ 9.4 ] [ 9.4.p1 ] [ 9.4.p2 ] [ 9.4.p3 ] [ 9.4.p4 ] [ 9.5 ] [ 9.5.p1 ] [ 9.5.p2 ] [ 9.6 ] [ 9.6.p1 ] [ 9.6.p2 ] [ 9.6.p3 ] [ 9.6.p4 ] [ 10.0 ] [ 10.0.p1 ] [ 10.0.p2 ] [ 10.0.p3 ] [ 10.0.p4 ] [ 10.1 ] [ 10.1.p1 ] [ 10.1.p2 ] [ 10.1.p3 ] [ 10.2 ] [ 10.2.p1 ] [ 10.2.p2 ] [ 10.2.p3 ] [ 10.3 ] [ 10.3.p1 ] [ 10.3.p2 ] [ 10.3.p3 ] [ 10.4 ] [ 10.4.p1 ] [ 10.4.p2 ] [ 10.4.p3 ] [ 10.5 ] [ 10.5.p1 ] [ 10.6 ] [ 10.6.p1 ] [ 10.6.p2 ] [ 10.6.p3 ] [ 10.7 ] [ 10.7.p1 ] [ 10.7.p2 ] [ 10.7.p3 ] [ 10.7.p4 ] [ 11.0 ] [ 11.0.p1 ] [ 11.0.p2 ] [ 11.0.p3, ] [ 11.0.p4 ] [ 11.1 ] [ 11.1.1 ] [ 11.1.2 ] [ 11.1.3 ] [ 11.2 ] [ 11.2.1 ] [ 11.2.2 ] [ 11.3.0 ]

Diff markup

Differences between /processes/electromagnetic/standard/include/G4BetheHeitlerModel.hh (Version 11.3.0) and /processes/electromagnetic/standard/include/G4BetheHeitlerModel.hh (Version 9.5.p2)


  1 //                                                  1 //
  2 // *******************************************      2 // ********************************************************************
  3 // * License and Disclaimer                         3 // * License and Disclaimer                                           *
  4 // *                                                4 // *                                                                  *
  5 // * The  Geant4 software  is  copyright of th      5 // * The  Geant4 software  is  copyright of the Copyright Holders  of *
  6 // * the Geant4 Collaboration.  It is provided      6 // * the Geant4 Collaboration.  It is provided  under  the terms  and *
  7 // * conditions of the Geant4 Software License      7 // * conditions of the Geant4 Software License,  included in the file *
  8 // * LICENSE and available at  http://cern.ch/      8 // * LICENSE and available at  http://cern.ch/geant4/license .  These *
  9 // * include a list of copyright holders.           9 // * include a list of copyright holders.                             *
 10 // *                                               10 // *                                                                  *
 11 // * Neither the authors of this software syst     11 // * Neither the authors of this software system, nor their employing *
 12 // * institutes,nor the agencies providing fin     12 // * institutes,nor the agencies providing financial support for this *
 13 // * work  make  any representation or  warran     13 // * work  make  any representation or  warranty, express or implied, *
 14 // * regarding  this  software system or assum     14 // * regarding  this  software system or assume any liability for its *
 15 // * use.  Please see the license in the file      15 // * use.  Please see the license in the file  LICENSE  and URL above *
 16 // * for the full disclaimer and the limitatio     16 // * for the full disclaimer and the limitation of liability.         *
 17 // *                                               17 // *                                                                  *
 18 // * This  code  implementation is the result      18 // * This  code  implementation is the result of  the  scientific and *
 19 // * technical work of the GEANT4 collaboratio     19 // * technical work of the GEANT4 collaboration.                      *
 20 // * By using,  copying,  modifying or  distri     20 // * By using,  copying,  modifying or  distributing the software (or *
 21 // * any work based  on the software)  you  ag     21 // * any work based  on the software)  you  agree  to acknowledge its *
 22 // * use  in  resulting  scientific  publicati     22 // * use  in  resulting  scientific  publications,  and indicate your *
 23 // * acceptance of all terms of the Geant4 Sof     23 // * acceptance of all terms of the Geant4 Software license.          *
 24 // *******************************************     24 // ********************************************************************
 25 //                                                 25 //
                                                   >>  26 // $Id: G4BetheHeitlerModel.hh,v 1.9 2010-10-26 10:35:22 vnivanch Exp $
                                                   >>  27 // GEANT4 tag $Name: not supported by cvs2svn $
 26 //                                                 28 //
 27 // -------------------------------------------     29 // -------------------------------------------------------------------
 28 //                                                 30 //
 29 // GEANT4 Class header file                        31 // GEANT4 Class header file
 30 //                                                 32 //
 31 //                                                 33 //
 32 // File name:     G4BetheHeitlerModel              34 // File name:     G4BetheHeitlerModel
 33 //                                                 35 //
 34 // Author:        Vladimir Ivanchenko on base      36 // Author:        Vladimir Ivanchenko on base of Michel Maire code
 35 //                                                 37 //
 36 // Creation date: 19.04.2005                       38 // Creation date: 19.04.2005
 37 //                                                 39 //
 38 // Modifications by Vladimir Ivanchenko, Miche <<  40 // Modifications:
                                                   >>  41 // 02-02-06 Remove InitialiseCrossSectionPerAtom();
 39 //                                                 42 //
 40 // Class Description:                              43 // Class Description:
 41 //                                                 44 //
 42 // Implementation of gamma conversion to e+e-  <<  45 // Implementation of gamma convertion to e+e- in the field of a nucleus 
 43 // For details see Physics Reference Manual    <<  46 // 
 44                                                    47 
 45 // -------------------------------------------     48 // -------------------------------------------------------------------
 46 //                                                 49 //
 47                                                    50 
 48 #ifndef G4BetheHeitlerModel_h                      51 #ifndef G4BetheHeitlerModel_h
 49 #define G4BetheHeitlerModel_h 1                    52 #define G4BetheHeitlerModel_h 1
 50                                                    53 
 51 #include "G4VEmModel.hh"                           54 #include "G4VEmModel.hh"
 52 #include "G4PhysicsTable.hh"                       55 #include "G4PhysicsTable.hh"
 53 #include "G4Log.hh"                            << 
 54                                                << 
 55 #include <vector>                              << 
 56                                                    56 
 57 class G4ParticleChangeForGamma;                    57 class G4ParticleChangeForGamma;
 58 class G4Pow;                                   << 
 59 class G4EmElementXS;                           << 
 60                                                    58 
 61 class G4BetheHeitlerModel : public G4VEmModel      59 class G4BetheHeitlerModel : public G4VEmModel
 62 {                                                  60 {
 63                                                    61 
 64 public:                                            62 public:
 65                                                    63 
 66   explicit G4BetheHeitlerModel(const G4Particl <<  64   G4BetheHeitlerModel(const G4ParticleDefinition* p = 0, 
 67                                const G4String& <<  65           const G4String& nam = "BetheHeitler");
 68                                                    66  
 69   ~G4BetheHeitlerModel() override;             <<  67   virtual ~G4BetheHeitlerModel();
 70                                                << 
 71   void Initialise(const G4ParticleDefinition*, << 
 72                                                    68 
 73   void InitialiseLocal(const G4ParticleDefinit <<  69   virtual void Initialise(const G4ParticleDefinition*, const G4DataVector&);
 74            G4VEmModel* masterModel) override;  << 
 75                                                    70 
 76   G4double ComputeCrossSectionPerAtom(const G4 <<  71   virtual G4double ComputeCrossSectionPerAtom(
 77               G4double kinEnergy,              <<  72                                 const G4ParticleDefinition*,
 78               G4double Z,                      <<  73                                       G4double kinEnergy, 
 79               G4double A=0.,                   <<  74                                       G4double Z, 
 80               G4double cut=0.,                 <<  75                                       G4double A=0., 
 81               G4double emax=DBL_MAX) override; <<  76                                       G4double cut=0.,
 82                                                <<  77                                       G4double emax=DBL_MAX);
 83   void SampleSecondaries(std::vector<G4Dynamic << 
 84        const G4MaterialCutsCouple*,            << 
 85        const G4DynamicParticle*,               << 
 86        G4double tmin,                          << 
 87        G4double maxEnergy) override;           << 
 88                                                    78 
 89   // hide assignment operator                  <<  79   virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
 90   G4BetheHeitlerModel & operator=(const G4Beth <<  80          const G4MaterialCutsCouple*,
 91   G4BetheHeitlerModel(const  G4BetheHeitlerMod <<  81          const G4DynamicParticle*,
                                                   >>  82          G4double tmin,
                                                   >>  83          G4double maxEnergy);
 92                                                    84 
 93 protected:                                     <<  85 private:
 94                                                    86 
 95   inline G4double ScreenFunction1(const G4doub <<  87   G4double ScreenFunction1(G4double ScreenVariable);
 96                                                    88 
 97   inline G4double ScreenFunction2(const G4doub <<  89   G4double ScreenFunction2(G4double ScreenVariable);
 98                                                    90 
 99   inline void ScreenFunction12(const G4double  <<  91   // hide assignment operator
                                                   >>  92   G4BetheHeitlerModel & operator=(const G4BetheHeitlerModel &right);
                                                   >>  93   G4BetheHeitlerModel(const  G4BetheHeitlerModel&);
100                                                    94 
101   void     InitialiseElementData();            <<  95   G4ParticleDefinition*     theGamma;
102                                                <<  96   G4ParticleDefinition*     theElectron;
103   struct ElementData {                         <<  97   G4ParticleDefinition*     thePositron;
104     G4double fDeltaMaxLow;                     <<  98   G4ParticleChangeForGamma* fParticleChange;
105     G4double fDeltaMaxHigh;                    <<  99 };
106   };                                           << 
107                                                << 
108   static const G4int                gMaxZet;   << 
109                                                << 
110   G4Pow*                            fG4Calc;   << 
111   const G4ParticleDefinition*       fTheGamma; << 
112   const G4ParticleDefinition*       fTheElectr << 
113   const G4ParticleDefinition*       fThePositr << 
114   G4ParticleChangeForGamma*         fParticleC << 
115   G4EmElementXS*                    fXSection{ << 
116                                                   100 
117   G4bool isFirstInstance{false};               << 101 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
118   G4bool useEPICS2017{false};                  << 
119                                                   102 
120   static std::vector<ElementData*>  gElementDa << 103 inline G4double G4BetheHeitlerModel::ScreenFunction1(G4double ScreenVariable)
121 };                                             << 
122                                                   104 
123 //                                             << 105 // compute the value of the screening function 3*PHI1 - PHI2
124 // Bethe screening functions for the elastic ( << 
125 // Bethe's phi1, phi2 coherent screening funct << 
126 // by using (the universal) atomic form factor << 
127 // Fermi model of the atom (using numerical so << 
128 // screening function instead of Moliere's ana << 
129 // numerical results can be well approximated  << 
130 // especially near the delta=1 limit) by:      << 
131 // ## if delta <= 1.4                          << 
132 //  phi1(delta) = 20.806 - delta*(3.190 - 0.57 << 
133 //  phi2(delta) = 20.234 - delta*(2.126 - 0.09 << 
134 // ## if delta  > 1.4                          << 
135 //  phi1(delta) = phi2(delta) = 21.0190 - 4.14 << 
136 // with delta = 136mc^2kZ^{-1/3}/[E(Eg-E)] = 1 << 
137 // Eg is the initial photon energy, E is the t << 
138 // the e-/e+ pair, eps0 = mc^2/Eg and eps = E/ << 
139                                                   106 
140 // Compute the value of the screening function << 
141 inline G4double G4BetheHeitlerModel::ScreenFun << 
142 {                                                 107 {
143   return (delta > 1.4) ? 42.038 - 8.29*G4Log(d << 108    G4double screenVal;
144                        : 42.184 - delta*(7.444 << 
145 }                                              << 
146                                                   109 
147 // Compute the value of the screening function << 110    if (ScreenVariable > 1.)
148 inline G4double G4BetheHeitlerModel::ScreenFun << 111      screenVal = 42.24 - 8.368*std::log(ScreenVariable+0.952);
149 {                                              << 112    else
150   return (delta > 1.4) ? 42.038 - 8.29*G4Log(d << 113      screenVal = 42.392 - ScreenVariable*(7.796 - 1.961*ScreenVariable);
151                        : 41.326 - delta*(5.848 << 114 
                                                   >> 115    return screenVal;
152 }                                                 116 }
153                                                   117 
154 // Same as ScreenFunction1 and ScreenFunction2 << 118 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
155 inline void G4BetheHeitlerModel::ScreenFunctio << 119 
156                                                << 120 inline G4double G4BetheHeitlerModel::ScreenFunction2(G4double ScreenVariable)
                                                   >> 121 
                                                   >> 122 // compute the value of the screening function 1.5*PHI1 - 0.5*PHI2
                                                   >> 123 
157 {                                                 124 {
158   if (delta > 1.4) {                           << 125    G4double screenVal;
159     f1 = 42.038 - 8.29*G4Log(delta + 0.958);   << 126 
160     f2 = f1;                                   << 127    if (ScreenVariable > 1.)
161   } else {                                     << 128      screenVal = 42.24 - 8.368*std::log(ScreenVariable+0.952);
162     f1 = 42.184 - delta*(7.444 - 1.623*delta); << 129    else
163     f2 = 41.326 - delta*(5.848 - 0.902*delta); << 130      screenVal = 41.405 - ScreenVariable*(5.828 - 0.8945*ScreenVariable);
164   }                                            << 131 
                                                   >> 132    return screenVal;
165 }                                                 133 }
                                                   >> 134 
                                                   >> 135 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
166                                                   136 
167 #endif                                            137 #endif
168                                                   138