source: trunk/source/processes/electromagnetic/muons/include/G4MuBremsstrahlungModel.hh @ 1015

Last change on this file since 1015 was 1007, checked in by garnier, 15 years ago

update to geant4.9.2
File size: 6.2 KB
Line 
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25//
26// $Id: G4MuBremsstrahlungModel.hh,v 1.21 2008/07/22 16:11:34 vnivanch Exp $
27// GEANT4 tag $Name: geant4-09-02 $
28//
29// -------------------------------------------------------------------
30//
31// GEANT4 Class header file
32//
33//
34// File name:     G4MuBremsstrahlungModel
35//
36// Author:        Vladimir Ivanchenko on base of Laszlo Urban code
37//
38// Creation date: 18.05.2002
39//
40// Modifications:
41//
42// 23-12-02 Change interface in order to move to cut per region (V.Ivanchenko)
43// 27-01-03 Make models region aware (V.Ivanchenko)
44// 13-02-03 Add name (V.Ivanchenko)
45// 10-02-04 Add lowestKinEnergy (V.Ivanchenko)
46// 08-04-05 Major optimisation of internal interfaces (V.Ivantchenko)
47// 13-02-06 Add ComputeCrossSectionPerAtom (mma)
48// 11-10-07 Add ignoreCut flag (V.Ivanchenko)
49// 28-02-08 Reorganized protected methods and members (V.Ivanchenko)
50// 06-03-08 Remove obsolete methods and members (V.Ivanchenko)
51//
52
53//
54// Class Description:
55//
56// Implementation of bremssrahlung by muons
57
58// -------------------------------------------------------------------
59//
60
61#ifndef G4MuBremsstrahlungModel_h
62#define G4MuBremsstrahlungModel_h 1
63
64#include "G4VEmModel.hh"
65#include "G4NistManager.hh"
66
67class G4Element;
68class G4ParticleChangeForLoss;
69
70class G4MuBremsstrahlungModel : public G4VEmModel
71{
72
73public:
74
75  G4MuBremsstrahlungModel(const G4ParticleDefinition* p = 0,
76                          const G4String& nam = "MuBrem");
77
78  virtual ~G4MuBremsstrahlungModel();
79
80  void SetParticle(const G4ParticleDefinition*);
81
82  void Initialise(const G4ParticleDefinition*, const G4DataVector&);
83
84  G4double MinEnergyCut(const G4ParticleDefinition*,
85                        const G4MaterialCutsCouple*);
86                             
87  virtual G4double ComputeCrossSectionPerAtom(
88                                 const G4ParticleDefinition*,
89                                 G4double kineticEnergy,
90                                 G4double Z, G4double A,
91                                 G4double cutEnergy,
92                                 G4double maxEnergy);
93                                                               
94  virtual G4double ComputeDEDXPerVolume(const G4Material*,
95                                const G4ParticleDefinition*,
96                                G4double kineticEnergy,
97                                G4double cutEnergy);
98                             
99  void SampleSecondaries(std::vector<G4DynamicParticle*>*,
100                         const G4MaterialCutsCouple*,
101                         const G4DynamicParticle*,
102                         G4double tmin,
103                         G4double maxEnergy);
104
105  inline void SetLowestKineticEnergy(G4double e);
106
107protected:
108
109  G4double ComputMuBremLoss(G4double Z, G4double tkin, G4double cut);
110 
111  G4double ComputeMicroscopicCrossSection(G4double tkin,
112                                          G4double Z,
113                                          G4double cut);
114
115  virtual G4double ComputeDMicroscopicCrossSection(G4double tkin,
116                                                   G4double Z,
117                                                   G4double gammaEnergy);
118
119  G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
120                              G4double kineticEnergy);
121
122private:
123
124  G4DataVector* ComputePartialSumSigma(const G4Material* material,
125                                       G4double tkin, G4double cut);
126
127  const G4Element* SelectRandomAtom(const G4MaterialCutsCouple* couple) const;
128
129  // hide assignment operator
130  G4MuBremsstrahlungModel & operator=(const  G4MuBremsstrahlungModel &right);
131  G4MuBremsstrahlungModel(const  G4MuBremsstrahlungModel&);
132
133protected:
134
135  const G4ParticleDefinition* particle;
136  G4NistManager* nist;
137  G4double mass;
138  G4double rmass;
139  G4double cc;
140  G4double coeff;
141  G4double sqrte;
142  G4double bh;
143  G4double bh1;
144  G4double btf;
145  G4double btf1;
146
147private:
148
149  G4ParticleDefinition*       theGamma;
150  G4ParticleChangeForLoss*    fParticleChange;
151
152  G4double highKinEnergy;
153  G4double lowKinEnergy;
154  G4double lowestKinEnergy;
155  G4double minThreshold;
156
157  std::vector<G4DataVector*> partialSumSigma;
158};
159
160//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
161
162inline 
163G4double G4MuBremsstrahlungModel::MaxSecondaryEnergy(const G4ParticleDefinition*,
164                                                     G4double kineticEnergy)
165{
166  return kineticEnergy;
167}
168
169//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
170
171inline void G4MuBremsstrahlungModel::SetLowestKineticEnergy(G4double e) 
172{
173  lowestKinEnergy = e;
174}
175
176//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
177
178inline
179G4double G4MuBremsstrahlungModel::MinEnergyCut(const G4ParticleDefinition*,
180                                               const G4MaterialCutsCouple*)
181{
182  return minThreshold;
183}
184
185//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
186
187inline
188void G4MuBremsstrahlungModel::SetParticle(const G4ParticleDefinition* p)
189{
190  if(!particle) {
191    particle = p;
192    mass = particle->GetPDGMass();
193    rmass=mass/electron_mass_c2 ;
194    cc=classic_electr_radius/rmass ;
195    coeff= 16.*fine_structure_const*cc*cc/3. ;
196  }
197}
198
199//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
200
201#endif
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