source: trunk/source/processes/electromagnetic/utils/src/G4VEmModel.cc @ 1229

Last change on this file since 1229 was 1228, checked in by garnier, 15 years ago

update geant4.9.3 tag
File size: 8.3 KB
Line 
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25//
26// $Id: G4VEmModel.cc,v 1.30 2009/09/23 14:42:47 vnivanch Exp $
27// GEANT4 tag $Name: geant4-09-03 $
28//
29// -------------------------------------------------------------------
30//
31// GEANT4 Class file
32//
33//
34// File name:     G4VEmModel
35//
36// Author:        Vladimir Ivanchenko
37//
38// Creation date: 25.07.2005
39//
40// Modifications:
41// 25.10.2005 Set default highLimit=100.TeV (V.Ivanchenko)
42// 06.02.2006 add method ComputeMeanFreePath() (mma)
43// 16.02.2009 Move implementations of virtual methods to source (VI)
44//
45//
46// Class Description:
47//
48// Abstract interface to energy loss models
49
50// -------------------------------------------------------------------
51//
52
53#include "G4VEmModel.hh"
54#include "G4LossTableManager.hh"
55#include "G4ProductionCutsTable.hh"
56#include "G4ParticleChangeForLoss.hh"
57#include "G4ParticleChangeForGamma.hh"
58
59//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
60//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
61
62G4VEmModel::G4VEmModel(const G4String& nam):
63  fluc(0), name(nam), lowLimit(0.1*keV), highLimit(100.0*TeV), 
64  eMinActive(0.0),eMaxActive(DBL_MAX),
65  polarAngleLimit(0.0),secondaryThreshold(DBL_MAX),theLPMflag(false),
66  pParticleChange(0),nuclearStopping(false),
67  currentCouple(0),currentElement(0),
68  nsec(5),flagDeexcitation(false) 
69{
70  xsec.resize(nsec);
71  nSelectors = 0;
72  G4LossTableManager::Instance()->Register(this);
73}
74
75//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
76
77G4VEmModel::~G4VEmModel()
78{
79  G4LossTableManager::Instance()->DeRegister(this);
80  G4int n = elmSelectors.size();
81  if(n > 0) {
82    for(G4int i=0; i<n; i++) { 
83      delete elmSelectors[i]; 
84    }
85  }
86}
87
88//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
89
90G4ParticleChangeForLoss* G4VEmModel::GetParticleChangeForLoss()
91{
92  G4ParticleChangeForLoss* p = 0;
93  if (pParticleChange) {
94    p = static_cast<G4ParticleChangeForLoss*>(pParticleChange);
95  } else {
96    p = new G4ParticleChangeForLoss();
97    pParticleChange = p;
98  }
99  return p;
100}
101
102//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
103
104G4ParticleChangeForGamma* G4VEmModel::GetParticleChangeForGamma()
105{
106  G4ParticleChangeForGamma* p = 0;
107  if (pParticleChange) {
108    p = static_cast<G4ParticleChangeForGamma*>(pParticleChange);
109  } else {
110    p = new G4ParticleChangeForGamma();
111    pParticleChange = p;
112  }
113  return p;
114}
115
116//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
117
118void G4VEmModel::InitialiseElementSelectors(const G4ParticleDefinition* p, 
119                                            const G4DataVector& cuts)
120{
121  // initialise before run
122  flagDeexcitation = false;
123
124  G4int nbins = G4int(std::log10(highLimit/lowLimit) + 0.5);
125  if(nbins < 3) nbins = 3;
126  G4bool spline = G4LossTableManager::Instance()->SplineFlag();
127
128  G4ProductionCutsTable* theCoupleTable=
129    G4ProductionCutsTable::GetProductionCutsTable();
130  G4int numOfCouples = theCoupleTable->GetTableSize();
131
132  // prepare vector
133  if(numOfCouples > nSelectors) elmSelectors.reserve(numOfCouples);
134
135  // initialise vector
136  for(G4int i=0; i<numOfCouples; i++) {
137    currentCouple = theCoupleTable->GetMaterialCutsCouple(i);
138    const G4Material* material = currentCouple->GetMaterial();
139    G4int idx = currentCouple->GetIndex();
140
141    // selector already exist check if should be deleted
142    G4bool create = true;
143    if(i < nSelectors) { 
144      if(elmSelectors[i]) {
145        if(material == elmSelectors[i]->GetMaterial()) create = false;
146        else delete elmSelectors[i];
147      }
148    } else {
149      nSelectors++;
150      elmSelectors.push_back(0); 
151    }
152    if(create) {
153      elmSelectors[i] = new G4EmElementSelector(this,material,nbins,
154                                                lowLimit,highLimit,spline);
155    }
156    elmSelectors[i]->Initialise(p, cuts[idx]);
157    //elmSelectors[i]->Dump(p);
158  } 
159}
160
161//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
162
163G4double G4VEmModel::ComputeDEDXPerVolume(const G4Material*,
164                                          const G4ParticleDefinition*,
165                                          G4double,G4double)
166{
167  return 0.0;
168}
169
170//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
171
172G4double G4VEmModel::CrossSectionPerVolume(const G4Material* material,
173                                           const G4ParticleDefinition* p,
174                                           G4double ekin,
175                                           G4double emin,
176                                           G4double emax)
177{
178  SetupForMaterial(p, material, ekin);
179  G4double cross = 0.0;
180  const G4ElementVector* theElementVector = material->GetElementVector();
181  const G4double* theAtomNumDensityVector = material->GetVecNbOfAtomsPerVolume();
182  G4int nelm = material->GetNumberOfElements(); 
183  if(nelm > nsec) {
184    xsec.resize(nelm);
185    nsec = nelm;
186  }
187  for (G4int i=0; i<nelm; i++) {
188    cross += theAtomNumDensityVector[i]*
189      ComputeCrossSectionPerAtom(p,(*theElementVector)[i],ekin,emin,emax);
190    xsec[i] = cross;
191  }
192  return cross;
193}
194
195//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
196
197G4double G4VEmModel::ComputeCrossSectionPerAtom(const G4ParticleDefinition*,
198                                                G4double, G4double, G4double,
199                                                G4double, G4double)
200{
201  return 0.0;
202}
203
204//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
205
206void G4VEmModel::DefineForRegion(const G4Region*) 
207{}
208
209//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
210
211G4double G4VEmModel::MinEnergyCut(const G4ParticleDefinition*,
212                                  const G4MaterialCutsCouple*)
213{
214  return 0.0;
215}
216
217//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
218
219G4double G4VEmModel::GetChargeSquareRatio(const G4ParticleDefinition* p,
220                                          const G4Material*, G4double)
221{
222  G4double q = p->GetPDGCharge()/CLHEP::eplus;
223  return q*q;
224}
225
226//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
227
228G4double G4VEmModel::GetParticleCharge(const G4ParticleDefinition* p,
229                                       const G4Material*, G4double)
230{
231  return p->GetPDGCharge();
232}
233
234//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
235
236void G4VEmModel::CorrectionsAlongStep(const G4MaterialCutsCouple*,
237                                      const G4DynamicParticle*,
238                                      G4double&,G4double&,G4double)
239{}
240
241//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
242
243void G4VEmModel::SampleDeexcitationAlongStep(const G4Material*,
244                                             const G4Track&,
245                                             G4double& )
246{}
247
248//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
249
250G4double G4VEmModel::MaxSecondaryEnergy(const G4ParticleDefinition*,
251                                        G4double kineticEnergy)
252{
253  return kineticEnergy;
254}
255
256//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
257
258void G4VEmModel::SetupForMaterial(const G4ParticleDefinition*,
259                                  const G4Material*, G4double)
260{}
261
262//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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