source: trunk/source/processes/electromagnetic/standard/include/G4BraggIonModel.hh@ 877

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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// $Id: G4BraggIonModel.hh,v 1.8 2007/05/22 17:34:36 vnivanch Exp $
27// GEANT4 tag $Name: $
28//
29// -------------------------------------------------------------------
30//
31// GEANT4 Class header file
32//
33//
34// File name: G4BraggIonModel
35//
36// Author: Vladimir Ivanchenko
37//
38// Creation date: 13.10.2004
39//
40// Modifications:
41// 09-11-04 Migration to new interface of Store/Retrieve tables (V.Ivantchenko)
42// 11-05-05 Major optimisation of internal interfaces (V.Ivantchenko)
43// 15-02-06 ComputeCrossSectionPerElectron, ComputeCrossSectionPerAtom (mma)
44// 25-04-06 Add stopping data from ASTAR (V.Ivanchenko)
45
46//
47// Class Description:
48//
49// Implementation of energy loss and delta-electron production
50// by heavy slow charged particles using eveluated data
51
52// -------------------------------------------------------------------
53//
54
55#ifndef G4BraggIonModel_h
56#define G4BraggIonModel_h 1
57
58#include "G4VEmModel.hh"
59#include "G4ASTARStopping.hh"
60
61class G4ParticleChangeForLoss;
62
63class G4BraggIonModel : public G4VEmModel
64{
65
66public:
67
68 G4BraggIonModel(const G4ParticleDefinition* p = 0,
69 const G4String& nam = "BraggIon");
70
71 virtual ~G4BraggIonModel();
72
73 virtual void Initialise(const G4ParticleDefinition*, const G4DataVector&);
74
75 G4double MinEnergyCut(const G4ParticleDefinition*,
76 const G4MaterialCutsCouple*);
77
78 virtual G4double ComputeCrossSectionPerElectron(
79 const G4ParticleDefinition*,
80 G4double kineticEnergy,
81 G4double cutEnergy,
82 G4double maxEnergy);
83
84 virtual G4double ComputeCrossSectionPerAtom(
85 const G4ParticleDefinition*,
86 G4double kineticEnergy,
87 G4double Z, G4double A,
88 G4double cutEnergy,
89 G4double maxEnergy);
90
91 virtual G4double CrossSectionPerVolume(const G4Material*,
92 const G4ParticleDefinition*,
93 G4double kineticEnergy,
94 G4double cutEnergy,
95 G4double maxEnergy);
96
97 virtual G4double ComputeDEDXPerVolume(const G4Material*,
98 const G4ParticleDefinition*,
99 G4double kineticEnergy,
100 G4double cutEnergy);
101
102 virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
103 const G4MaterialCutsCouple*,
104 const G4DynamicParticle*,
105 G4double tmin,
106 G4double maxEnergy);
107
108protected:
109
110 G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
111 G4double kinEnergy);
112
113private:
114
115 void SetParticle(const G4ParticleDefinition* p);
116
117 G4double HeEffChargeSquare(G4double z, G4double kinEnergyInMeV) const;
118
119 // hide assignment operator
120 G4BraggIonModel & operator=(const G4BraggIonModel &right);
121 G4BraggIonModel(const G4BraggIonModel&);
122
123 G4bool HasMaterial(const G4Material* material);
124
125 G4double StoppingPower(const G4Material* material,
126 G4double kineticEnergy);
127
128 G4double ElectronicStoppingPower(G4double z,
129 G4double kineticEnergy) const;
130
131 void SetMoleculaNumber(G4int number) {iMolecula = number;};
132
133 G4double DEDX(const G4Material* material, G4double kineticEnergy);
134
135 const G4ParticleDefinition* particle;
136 G4ParticleDefinition* theElectron;
137 G4ParticleChangeForLoss* fParticleChange;
138
139 G4ASTARStopping astar;
140
141 G4double mass;
142 G4double spin;
143 G4double chargeSquare;
144 G4double massRate;
145 G4double ratio;
146 G4double highKinEnergy;
147 G4double lowKinEnergy;
148 G4double lowestKinEnergy;
149 G4double HeMass;
150 G4double massFactor;
151 G4double rateMassHe2p;
152 G4double theZieglerFactor;
153
154 G4int iMolecula; // index in the molecula's table
155 G4bool isIon;
156};
157
158//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
159
160inline G4double G4BraggIonModel::MaxSecondaryEnergy(
161 const G4ParticleDefinition* pd,
162 G4double kinEnergy)
163{
164 if(pd != particle) SetParticle(pd);
165 G4double tau = kinEnergy/mass;
166 G4double tmax = 2.0*electron_mass_c2*tau*(tau + 2.) /
167 (1. + 2.0*(tau + 1.)*ratio + ratio*ratio);
168 return tmax;
169}
170
171//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
172
173inline void G4BraggIonModel::SetParticle(const G4ParticleDefinition* p)
174{
175 particle = p;
176 mass = particle->GetPDGMass();
177 spin = particle->GetPDGSpin();
178 G4double q = particle->GetPDGCharge()/eplus;
179 chargeSquare = q*q;
180 massRate = mass/proton_mass_c2;
181 ratio = electron_mass_c2/mass;
182}
183
184//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
185
186#endif
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