source: trunk/source/processes/electromagnetic/standard/include/G4PAIPhotonModel.hh@ 1036

Last change on this file since 1036 was 1007, checked in by garnier, 17 years ago

update to geant4.9.2
File size: 7.5 KB
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1//
2// ********************************************************************
3// * License and Disclaimer *
4// * *
5// * The Geant4 software is copyright of the Copyright Holders of *
6// * the Geant4 Collaboration. It is provided under the terms and *
7// * conditions of the Geant4 Software License, included in the file *
8// * LICENSE and available at http://cern.ch/geant4/license . These *
9// * include a list of copyright holders. *
10// * *
11// * Neither the authors of this software system, nor their employing *
12// * institutes,nor the agencies providing financial support for this *
13// * work make any representation or warranty, express or implied, *
14// * regarding this software system or assume any liability for its *
15// * use. Please see the license in the file LICENSE and URL above *
16// * for the full disclaimer and the limitation of liability. *
17// * *
18// * This code implementation is the result of the scientific and *
19// * technical work of the GEANT4 collaboration. *
20// * By using, copying, modifying or distributing the software (or *
21// * any work based on the software) you agree to acknowledge its *
22// * use in resulting scientific publications, and indicate your *
23// * acceptance of all terms of the Geant4 Software license. *
24// ********************************************************************
25//
26//
27// -------------------------------------------------------------------
28//
29// GEANT4 Class header file
30//
31//
32// File name: G4PAIPhotonModel
33//
34// Author: V. Grichine based on Vladimir Ivanchenko code
35//
36// Creation date: 05.10.2003
37//
38// Modifications:
39// 11.04.05 Major optimisation of internal interfaces (V.Ivantchenko)
40// 26-09-07 Fixed tmax computation (V.Ivantchenko)
41//
42//
43// Class Description:
44//
45// Implementation of PAI model of energy loss and
46// delta-electron production by heavy charged particles
47
48// -------------------------------------------------------------------
49//
50
51#ifndef G4PAIPhotonModel_h
52#define G4PAIPhotonModel_h 1
53
54#include <vector>
55#include "G4VEmModel.hh"
56#include "globals.hh"
57#include "G4VEmFluctuationModel.hh"
58
59class G4PhysicsLogVector;
60class G4PhysicsTable;
61class G4Region;
62class G4MaterialCutsCouple;
63class G4ParticleChangeForLoss;
64
65class G4PAIPhotonModel : public G4VEmModel, public G4VEmFluctuationModel
66{
67
68public:
69
70 G4PAIPhotonModel(const G4ParticleDefinition* p = 0, const G4String& nam = "PAIPhoton");
71
72 virtual ~G4PAIPhotonModel();
73
74 virtual void Initialise(const G4ParticleDefinition*, const G4DataVector&);
75
76 virtual void InitialiseMe(const G4ParticleDefinition*) {};
77
78 virtual G4double ComputeDEDX(const G4MaterialCutsCouple*,
79 const G4ParticleDefinition*,
80 G4double kineticEnergy,
81 G4double cutEnergy);
82
83 virtual G4double CrossSection(const G4MaterialCutsCouple*,
84 const G4ParticleDefinition*,
85 G4double kineticEnergy,
86 G4double cutEnergy,
87 G4double maxEnergy);
88
89 virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
90 const G4MaterialCutsCouple*,
91 const G4DynamicParticle*,
92 G4double tmin,
93 G4double maxEnergy);
94
95 virtual G4double SampleFluctuations(const G4Material*,
96 const G4DynamicParticle*,
97 G4double&,
98 G4double&,
99 G4double&);
100
101 virtual G4double Dispersion( const G4Material*,
102 const G4DynamicParticle*,
103 G4double&,
104 G4double&);
105
106 void DefineForRegion(const G4Region* r) ;
107 void ComputeSandiaPhotoAbsCof();
108 void BuildPAIonisationTable();
109 void BuildLambdaVector(const G4MaterialCutsCouple* matCutsCouple);
110
111 G4double GetdNdxCut( G4int iPlace, G4double transferCut);
112 G4double GetdNdxPhotonCut( G4int iPlace, G4double transferCut);
113 G4double GetdNdxPlasmonCut( G4int iPlace, G4double transferCut);
114
115 G4double GetdEdxCut( G4int iPlace, G4double transferCut);
116
117 G4double GetPostStepTransfer(G4PhysicsTable*, G4PhysicsLogVector*,
118 G4int iPlace, G4double scaledTkin );
119 G4double GetAlongStepTransfer(G4PhysicsTable*, G4PhysicsLogVector*,
120 G4int iPlace, G4double scaledTkin,G4double step, G4double cof );
121 G4double GetEnergyTransfer(G4PhysicsTable*, G4int iPlace,
122 G4double position, G4int iTransfer );
123
124
125
126protected:
127
128 G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
129 G4double kinEnergy);
130
131private:
132
133 void SetParticle(const G4ParticleDefinition* p);
134
135 // hide assignment operator
136 G4PAIPhotonModel & operator=(const G4PAIPhotonModel &right);
137 G4PAIPhotonModel(const G4PAIPhotonModel&);
138
139 // The vector over proton kinetic energies: the range of gammas
140
141 G4double fLowestKineticEnergy;
142 G4double fHighestKineticEnergy;
143 G4int fTotBin;
144 G4int fMeanNumber;
145 G4int fVerbose;
146 G4PhysicsLogVector* fProtonEnergyVector ;
147
148
149
150 // vectors
151
152 G4PhysicsTable* fPAItransferTable;
153 std::vector<G4PhysicsTable*> fPAIxscBank;
154
155 G4PhysicsTable* fPAIphotonTable;
156 std::vector<G4PhysicsTable*> fPAIphotonBank;
157
158 G4PhysicsTable* fPAIplasmonTable;
159 std::vector<G4PhysicsTable*> fPAIplasmonBank;
160
161 G4PhysicsTable* fPAIdEdxTable;
162 std::vector<G4PhysicsTable*> fPAIdEdxBank;
163
164 std::vector<const G4MaterialCutsCouple*> fMaterialCutsCoupleVector;
165 std::vector<const G4Region*> fPAIRegionVector;
166
167 size_t fMatIndex ;
168 G4double** fSandiaPhotoAbsCof ;
169 G4int fSandiaIntervalNumber ;
170
171 G4PhysicsLogVector* fdEdxVector ;
172 std::vector<G4PhysicsLogVector*> fdEdxTable ;
173
174 G4PhysicsLogVector* fLambdaVector ;
175 std::vector<G4PhysicsLogVector*> fLambdaTable ;
176
177 G4PhysicsLogVector* fdNdxCutVector ;
178 std::vector<G4PhysicsLogVector*> fdNdxCutTable ;
179
180 G4PhysicsLogVector* fdNdxCutPhotonVector ;
181 std::vector<G4PhysicsLogVector*> fdNdxCutPhotonTable ;
182
183 G4PhysicsLogVector* fdNdxCutPlasmonVector ;
184 std::vector<G4PhysicsLogVector*> fdNdxCutPlasmonTable ;
185
186
187 const G4ParticleDefinition* fParticle;
188 const G4ParticleDefinition* fElectron;
189 const G4ParticleDefinition* fPositron;
190 G4ParticleChangeForLoss* fParticleChange;
191
192 G4double fMass;
193 G4double fSpin;
194 G4double fChargeSquare;
195 G4double fRatio;
196 G4double fHighKinEnergy;
197 G4double fLowKinEnergy;
198 G4double fTwoln10;
199 G4double fBg2lim;
200 G4double fTaulim;
201 G4double fQc;
202
203 G4bool isInitialised;
204};
205
206/////////////////////////////////////////////////////////////////////
207
208inline G4double G4PAIPhotonModel::MaxSecondaryEnergy( const G4ParticleDefinition* p,
209 G4double kinEnergy)
210{
211 G4double tmax = kinEnergy;
212 if(p == fElectron) tmax *= 0.5;
213 else if(p != fPositron) {
214 G4double mass = p->GetPDGMass();
215 G4double ratio= electron_mass_c2/mass;
216 G4double gamma= kinEnergy/mass + 1.0;
217 tmax = 2.0*electron_mass_c2*(gamma*gamma - 1.) /
218 (1. + 2.0*gamma*ratio + ratio*ratio);
219 }
220 return tmax;
221}
222
223///////////////////////////////////////////////////////////////
224
225inline void G4PAIPhotonModel::DefineForRegion(const G4Region* r)
226{
227 fPAIRegionVector.push_back(r);
228}
229
230#endif
231
232
233
234
235
236
237
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