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G4eBremParametrizedModel.hh
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25 //
26 //
27 // -------------------------------------------------------------------
28 //
29 // GEANT4 Class header file
30 //
31 //
32 // File name: G4eBremParametrizedModel
33 // extention of standard G4eBremsstrahlungModel
34 //
35 // Author: Andreas Schaelicke
36 //
37 // Creation date: 28.03.2008
38 //
39 // Modifications:
40 //
41 //
42 // Class Description:
43 //
44 // Implementation of energy loss for gamma emission by electrons and
45 // positrons including an improved version of the LPM effect
46 
47 // -------------------------------------------------------------------
48 //
49 
50 #ifndef G4eBremParametrizedModel_h
51 #define G4eBremParametrizedModel_h 1
52 
53 #include "G4VEmModel.hh"
54 #include "G4NistManager.hh"
55 
57 class G4PhysicsVector;
58 
60 {
61 
62 public:
63 
64  explicit G4eBremParametrizedModel(const G4ParticleDefinition* p = nullptr,
65  const G4String& nam = "eBremParam");
66 
67  virtual ~G4eBremParametrizedModel();
68 
69  virtual void Initialise(const G4ParticleDefinition*, const G4DataVector&) override;
70 
71  virtual void InitialiseLocal(const G4ParticleDefinition*,
72  G4VEmModel* masterModel) override;
73 
75  const G4MaterialCutsCouple*) override;
76 
78  const G4ParticleDefinition*,
79  G4double kineticEnergy,
80  G4double cutEnergy) override;
81 
83  G4double tkin,
85  G4double cutEnergy,
86  G4double maxEnergy = DBL_MAX) override;
87 
88  virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
89  const G4MaterialCutsCouple*,
90  const G4DynamicParticle*,
91  G4double cutEnergy,
92  G4double maxEnergy) override;
93 
94  virtual void SetupForMaterial(const G4ParticleDefinition*,
95  const G4Material*,G4double) override;
96 
97 
98 private:
99 
100  void InitialiseConstants();
101 
102  G4double ComputeBremLoss(G4double cutEnergy);
103 
105 
107 
109  G4double gammaEnergy,
110  G4double Z);
111 
112  void SetParticle(const G4ParticleDefinition* p);
113 
114  G4double ScreenFunction1(G4double ScreenVariable);
115 
116  G4double ScreenFunction2(G4double ScreenVariable);
117 
118  // * fast inline functions *
119  inline void SetCurrentElement(const G4double);
120 
121  // hide assignment operator
124 
125 protected:
126 
131 
132  static const G4double xgi[8], wgi[8];
133 
135 
136  // cash
147 
149 
150 private:
151 
152  // consts
156 
158 };
159 
160 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
161 
163 {
164  //std::cout<<"SetCurrentElement Z="<<Z<<std::endl;
165  if(Z != currentZ) {
166  currentZ = Z;
167 
168  G4int iz = G4int(Z);
169  z13 = nist->GetZ13(iz);
170  z23 = z13*z13;
171  lnZ = nist->GetLOGZ(iz);
172 
173  Fel = facFel - lnZ/3. ;
174  Finel = facFinel - 2.*lnZ/3. ;
175 
177  fMax = Fel-fCoulomb + Finel/currentZ + (1.+1./currentZ)/12.;
178 
179  }
180 }
181 
182 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
183 
184 
185 #endif