source: trunk/source/processes/electromagnetic/utils/src/G4ElectronIonPair.cc@ 991

Last change on this file since 991 was 968, checked in by garnier, 17 years ago

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[968]1//
2// ********************************************************************
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14// * regarding this software system or assume any liability for its *
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24// ********************************************************************
25//
26// $Id: G4ElectronIonPair.cc,v 1.2 2008/10/17 14:46:16 vnivanch Exp $
27// GEANT4 tag $Name: geant4-09-02-ref-02 $
28//
29// -------------------------------------------------------------------
30//
31// GEANT4 Class file
32//
33//
34// File name: G4ElectronIonPair
35//
36// Author: Vladimir Ivanchenko
37//
38// Creation date: 08.07.2008
39//
40// Modifications:
41//
42// -------------------------------------------------------------
43
44//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
45//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
46
47#include "G4ElectronIonPair.hh"
48#include "G4Gamma.hh"
49#include "G4Material.hh"
50#include "G4MaterialTable.hh"
51#include "G4StepPoint.hh"
52#include "G4VProcess.hh"
53#include "G4ProcessType.hh"
54#include "G4Track.hh"
55#include "Randomize.hh"
56
57//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
58
59G4ElectronIonPair::G4ElectronIonPair()
60{
61 verbose = 1;
62 curMaterial = 0;
63 curMeanEnergy = 0.0;
64 nMaterials = 0;
65 Initialise();
66}
67
68//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
69
70G4ElectronIonPair::~G4ElectronIonPair()
71{}
72
73//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
74
75G4double G4ElectronIonPair::MeanNumberOfIonsAlongStep(
76 const G4ParticleDefinition* part,
77 const G4Material* material,
78 G4double edep,
79 G4double niel)
80{
81 G4double nion = 0.0;
82
83 // NIEL does not provide ionisation clusters
84 if(edep > niel) {
85
86 // neutral particles do not produce ionisation along step
87 if(part->GetPDGCharge() != 0.0) {
88
89 // select material
90 if(material != curMaterial) {
91 curMaterial = material;
92 curMeanEnergy = material->GetIonisation()->GetMeanEnergyPerIonPair();
93
94 // if mean energy is not defined then look into G4 DB
95 if(0.0 == curMeanEnergy) {
96 curMeanEnergy = FindG4MeanEnergyPerIonPair(material);
97 }
98 }
99 if(curMeanEnergy > 0.0) nion = (edep - niel)/curMeanEnergy;
100 }
101 }
102 return nion;
103}
104
105//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
106
107std::vector<G4ThreeVector>*
108G4ElectronIonPair::SampleIonsAlongStep(const G4ThreeVector& prePos,
109 const G4ThreeVector& postPos,
110 G4double meanion)
111{
112 std::vector<G4ThreeVector>* v = new std::vector<G4ThreeVector>;
113
114 G4double sig = 0.2*std::sqrt(meanion);
115 G4int nion = G4int(G4RandGauss::shoot(meanion,sig) + 0.5);
116
117 // sample ionisation along step
118 if(nion > 0) {
119
120 G4ThreeVector deltaPos = postPos - prePos;
121 for(G4int i=0; i<nion; i++) {
122 v->push_back( prePos + deltaPos*G4UniformRand() );
123 }
124 if(verbose > 1 ) {
125 G4cout << "### G4ElectronIonPair::SampleIonisationPoints: "
126 << v->size() << " ion pairs are added" << G4endl;
127 }
128 }
129 return v;
130}
131
132//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
133
134G4int G4ElectronIonPair::ResidualeChargePostStep(const G4ParticleDefinition*,
135 const G4TrackVector*,
136 G4int subType)
137{
138 G4int nholes = 0;
139
140 if(2 == subType || 12 == subType || 13 == subType) nholes = 1;
141 return nholes;
142}
143
144//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
145
146G4double G4ElectronIonPair::FindG4MeanEnergyPerIonPair(const G4Material* mat)
147{
148 G4String name = mat->GetName();
149 G4double res = 0.0;
150
151 // is this material in the vector?
152 for(G4int j=0; j<nMaterials; j++) {
153 if(name == g4MatNames[j]) {
154 res = g4MatData[j];
155 mat->GetIonisation()->SetMeanEnergyPerIonPair(res);
156 if(verbose > 0) {
157 G4cout << "### G4ElectronIonPair::FindG4MeanEnergyPerIonPair for "
158 << name << " Epair= " << res/eV << " eV is set"
159 << G4endl;
160 }
161 break;
162 }
163 }
164 return res;
165}
166
167//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
168
169void G4ElectronIonPair:: DumpMeanEnergyPerIonPair()
170{
171 G4int nmat = G4Material::GetNumberOfMaterials();
172 const G4MaterialTable* mtable = G4Material::GetMaterialTable();
173 if(nmat > 0) {
174 G4cout << "### G4ElectronIonPair: mean energy per ion pair avalable:" << G4endl;
175 for(G4int i=0; i<nmat; i++) {
176 const G4Material* mat = (*mtable)[i];
177 G4double x = mat->GetIonisation()->GetMeanEnergyPerIonPair();
178 if(x > 0.0) {
179 G4cout << " " << mat->GetName() << " Epair= "
180 << x/eV << " eV" << G4endl;
181 }
182 }
183 }
184}
185
186//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
187
188void G4ElectronIonPair::DumpG4MeanEnergyPerIonPair()
189{
190 if(nMaterials > 0) {
191 G4cout << "### G4ElectronIonPair: mean energy per ion pair "
192 << " for Geant4 materials" << G4endl;
193 for(G4int i=0; i<nMaterials; i++) {
194 G4cout << " " << g4MatNames[i] << " Epair= "
195 << g4MatData[i]/eV << " eV" << G4endl;
196 }
197 }
198}
199
200//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
201
202void G4ElectronIonPair::Initialise()
203{
204 // ICRU Report 31, 1979
205 g4MatNames.push_back("G4_Si");
206 g4MatData.push_back(3.62*eV);
207
208 g4MatNames.push_back("G4_Ge");
209 g4MatData.push_back(2.97*eV);
210
211 g4MatNames.push_back("G4_He");
212 g4MatData.push_back(44.4*eV);
213
214 g4MatNames.push_back("G4_N");
215 g4MatData.push_back(36.4*eV);
216
217 g4MatNames.push_back("G4_O");
218 g4MatData.push_back(32.3*eV);
219
220 g4MatNames.push_back("G4_Ne");
221 g4MatData.push_back(36.8*eV);
222
223 g4MatNames.push_back("G4_Ar");
224 g4MatData.push_back(26.34*eV);
225
226 g4MatNames.push_back("G4_Kr");
227 g4MatData.push_back(24.1*eV);
228
229 g4MatNames.push_back("G4_Xe");
230 g4MatData.push_back(21.6*eV);
231
232 g4MatNames.push_back("G4_lAr");
233 g4MatData.push_back(23.6*eV);
234
235 g4MatNames.push_back("G4_lKr");
236 g4MatData.push_back(20.5*eV);
237
238 g4MatNames.push_back("G4_lXe");
239 g4MatData.push_back(15.6*eV);
240
241 g4MatNames.push_back("G4_AIR");
242 g4MatData.push_back(35.1*eV);
243
244 nMaterials = g4MatData.size();
245}
246
247//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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