source: trunk/source/processes/electromagnetic/utils/src/G4ElectronIonPair.cc@ 1344

Last change on this file since 1344 was 1340, checked in by garnier, 15 years ago

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[968]1//
2// ********************************************************************
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14// * regarding this software system or assume any liability for its *
15// * use. Please see the license in the file LICENSE and URL above *
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19// * technical work of the GEANT4 collaboration. *
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24// ********************************************************************
25//
[1340]26// $Id: G4ElectronIonPair.cc,v 1.5 2010/10/25 17:23:01 vnivanch Exp $
27// GEANT4 tag $Name: emutils-V09-03-23 $
[968]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 "G4Material.hh"
49#include "G4MaterialTable.hh"
50#include "G4StepPoint.hh"
51#include "G4VProcess.hh"
52#include "G4ProcessType.hh"
53#include "G4Track.hh"
54#include "Randomize.hh"
55
56//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
57
58G4ElectronIonPair::G4ElectronIonPair()
59{
60 verbose = 1;
61 curMaterial = 0;
62 curMeanEnergy = 0.0;
63 nMaterials = 0;
[1340]64 FanoFactor = 0.2;
[968]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 }
[1340]99 if(curMeanEnergy > 0.0) { nion = (edep - niel)/curMeanEnergy; }
[968]100 }
101 }
102 return nion;
103}
104
105//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
106
107std::vector<G4ThreeVector>*
[1340]108G4ElectronIonPair::SampleIonsAlongStep(const G4Step* step)
[968]109{
[1340]110 std::vector<G4ThreeVector>* v = 0;
[968]111
[1340]112 G4int nion = SampleNumberOfIonsAlongStep(step);
[968]113
114 // sample ionisation along step
115 if(nion > 0) {
116
[1340]117 v = new std::vector<G4ThreeVector>;
118 G4ThreeVector prePos = step->GetPreStepPoint()->GetPosition();
119 G4ThreeVector deltaPos = step->GetPostStepPoint()->GetPosition() - prePos;
120 for(G4int i=0; i<nion; ++i) {
[968]121 v->push_back( prePos + deltaPos*G4UniformRand() );
122 }
123 if(verbose > 1 ) {
124 G4cout << "### G4ElectronIonPair::SampleIonisationPoints: "
125 << v->size() << " ion pairs are added" << G4endl;
126 }
127 }
128 return v;
129}
130
131//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
132
133G4int G4ElectronIonPair::ResidualeChargePostStep(const G4ParticleDefinition*,
134 const G4TrackVector*,
135 G4int subType)
136{
137 G4int nholes = 0;
138
[1340]139 if(2 == subType || 12 == subType || 13 == subType) { nholes = 1; }
[968]140 return nholes;
141}
142
143//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
144
145G4double G4ElectronIonPair::FindG4MeanEnergyPerIonPair(const G4Material* mat)
146{
147 G4String name = mat->GetName();
148 G4double res = 0.0;
149
150 // is this material in the vector?
151 for(G4int j=0; j<nMaterials; j++) {
152 if(name == g4MatNames[j]) {
153 res = g4MatData[j];
154 mat->GetIonisation()->SetMeanEnergyPerIonPair(res);
155 if(verbose > 0) {
156 G4cout << "### G4ElectronIonPair::FindG4MeanEnergyPerIonPair for "
157 << name << " Epair= " << res/eV << " eV is set"
158 << G4endl;
159 }
160 break;
161 }
162 }
163 return res;
164}
165
166//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
167
168void G4ElectronIonPair:: DumpMeanEnergyPerIonPair()
169{
170 G4int nmat = G4Material::GetNumberOfMaterials();
171 const G4MaterialTable* mtable = G4Material::GetMaterialTable();
172 if(nmat > 0) {
173 G4cout << "### G4ElectronIonPair: mean energy per ion pair avalable:" << G4endl;
[1340]174 for(G4int i=0; i<nmat; ++i) {
[968]175 const G4Material* mat = (*mtable)[i];
176 G4double x = mat->GetIonisation()->GetMeanEnergyPerIonPair();
177 if(x > 0.0) {
178 G4cout << " " << mat->GetName() << " Epair= "
179 << x/eV << " eV" << G4endl;
180 }
181 }
182 }
183}
184
185//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
186
187void G4ElectronIonPair::DumpG4MeanEnergyPerIonPair()
188{
189 if(nMaterials > 0) {
190 G4cout << "### G4ElectronIonPair: mean energy per ion pair "
191 << " for Geant4 materials" << G4endl;
[1340]192 for(G4int i=0; i<nMaterials; ++i) {
[968]193 G4cout << " " << g4MatNames[i] << " Epair= "
194 << g4MatData[i]/eV << " eV" << G4endl;
195 }
196 }
197}
198
199//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
200
201void G4ElectronIonPair::Initialise()
202{
203 // ICRU Report 31, 1979
204 g4MatNames.push_back("G4_Si");
205 g4MatData.push_back(3.62*eV);
206
207 g4MatNames.push_back("G4_Ge");
208 g4MatData.push_back(2.97*eV);
209
210 g4MatNames.push_back("G4_He");
211 g4MatData.push_back(44.4*eV);
212
213 g4MatNames.push_back("G4_N");
214 g4MatData.push_back(36.4*eV);
215
216 g4MatNames.push_back("G4_O");
217 g4MatData.push_back(32.3*eV);
218
219 g4MatNames.push_back("G4_Ne");
220 g4MatData.push_back(36.8*eV);
221
222 g4MatNames.push_back("G4_Ar");
223 g4MatData.push_back(26.34*eV);
224
225 g4MatNames.push_back("G4_Kr");
226 g4MatData.push_back(24.1*eV);
227
228 g4MatNames.push_back("G4_Xe");
229 g4MatData.push_back(21.6*eV);
230
231 g4MatNames.push_back("G4_lAr");
232 g4MatData.push_back(23.6*eV);
233
234 g4MatNames.push_back("G4_lKr");
235 g4MatData.push_back(20.5*eV);
236
237 g4MatNames.push_back("G4_lXe");
238 g4MatData.push_back(15.6*eV);
239
240 g4MatNames.push_back("G4_AIR");
241 g4MatData.push_back(35.1*eV);
242
243 nMaterials = g4MatData.size();
244}
245
246//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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