source: trunk/source/processes/electromagnetic/lowenergy/src/G4DNABornExcitationModel.cc @ 1347

Last change on this file since 1347 was 1347, checked in by garnier, 14 years ago

geant4 tag 9.4
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26// $Id: G4DNABornExcitationModel.cc,v 1.10 2010/08/24 13:51:06 sincerti Exp $
27// GEANT4 tag $Name: geant4-09-04-ref-00 $
28//
29
30#include "G4DNABornExcitationModel.hh"
31
32//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
33
34using namespace std;
35
36//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
37
38G4DNABornExcitationModel::G4DNABornExcitationModel(const G4ParticleDefinition*,
39                                             const G4String& nam)
40:G4VEmModel(nam),isInitialised(false)
41{
42  verboseLevel= 0;
43  // Verbosity scale:
44  // 0 = nothing
45  // 1 = warning for energy non-conservation
46  // 2 = details of energy budget
47  // 3 = calculation of cross sections, file openings, sampling of atoms
48  // 4 = entering in methods
49 
50  if( verboseLevel>0 ) 
51  { 
52    G4cout << "Born excitation model is constructed " << G4endl;
53  }
54 
55}
56
57//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
58
59G4DNABornExcitationModel::~G4DNABornExcitationModel()
60{ 
61  // Cross section
62 
63  std::map< G4String,G4DNACrossSectionDataSet*,std::less<G4String> >::iterator pos;
64  for (pos = tableData.begin(); pos != tableData.end(); ++pos)
65  {
66    G4DNACrossSectionDataSet* table = pos->second;
67    delete table;
68  }
69
70}
71
72//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
73
74void G4DNABornExcitationModel::Initialise(const G4ParticleDefinition* particle,
75                                       const G4DataVector& /*cuts*/)
76{
77
78  if (verboseLevel > 3)
79    G4cout << "Calling G4DNABornExcitationModel::Initialise()" << G4endl;
80
81  G4String fileElectron("dna/sigma_excitation_e_born");
82  G4String fileProton("dna/sigma_excitation_p_born");
83
84  G4ParticleDefinition* electronDef = G4Electron::ElectronDefinition();
85  G4ParticleDefinition* protonDef = G4Proton::ProtonDefinition();
86
87  G4String electron;
88  G4String proton;
89 
90  G4double scaleFactor = (1.e-22 / 3.343) * m*m;
91
92  if (electronDef != 0)
93  {
94    electron = electronDef->GetParticleName();
95
96    tableFile[electron] = fileElectron;
97
98    lowEnergyLimit[electron] = 9. * eV; 
99    highEnergyLimit[electron] = 1. * MeV;
100
101    // Cross section
102   
103    G4DNACrossSectionDataSet* tableE = new G4DNACrossSectionDataSet(new G4LogLogInterpolation, eV,scaleFactor );
104    tableE->LoadData(fileElectron);
105     
106    tableData[electron] = tableE;
107   
108  }
109  else
110  {
111    G4Exception("G4DNABornExcitationModel::Initialise(): electron is not defined");
112  }
113
114  if (protonDef != 0)
115  {
116    proton = protonDef->GetParticleName();
117
118    tableFile[proton] = fileProton;
119
120    lowEnergyLimit[proton] = 500. * keV;
121    highEnergyLimit[proton] = 100. * MeV;
122
123    // Cross section
124   
125    G4DNACrossSectionDataSet* tableP = new G4DNACrossSectionDataSet(new G4LogLogInterpolation, eV,scaleFactor );
126    tableP->LoadData(fileProton);
127     
128    tableData[proton] = tableP;
129     
130  }
131  else
132  {
133    G4Exception("G4DNABornExcitationModel::Initialise(): proton is not defined");
134  }
135
136  if (particle==electronDef) 
137  {
138    SetLowEnergyLimit(lowEnergyLimit[electron]);
139    SetHighEnergyLimit(highEnergyLimit[electron]);
140  }
141
142  if (particle==protonDef) 
143  {
144    SetLowEnergyLimit(lowEnergyLimit[proton]);
145    SetHighEnergyLimit(highEnergyLimit[proton]);
146  }
147
148  if( verboseLevel>0 ) 
149  { 
150    G4cout << "Born excitation model is initialized " << G4endl
151           << "Energy range: "
152           << LowEnergyLimit() / eV << " eV - "
153           << HighEnergyLimit() / keV << " keV for "
154           << particle->GetParticleName()
155           << G4endl;
156  }
157 
158 
159  if(!isInitialised) 
160  {
161    isInitialised = true;
162 
163    if(pParticleChange)
164      fParticleChangeForGamma = reinterpret_cast<G4ParticleChangeForGamma*>(pParticleChange);
165    else
166      fParticleChangeForGamma = new G4ParticleChangeForGamma();
167  }   
168
169  // InitialiseElementSelectors(particle,cuts);
170
171}
172
173//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
174
175G4double G4DNABornExcitationModel::CrossSectionPerVolume(const G4Material* material,
176                                           const G4ParticleDefinition* particleDefinition,
177                                           G4double ekin,
178                                           G4double,
179                                           G4double)
180{
181  if (verboseLevel > 3)
182    G4cout << "Calling CrossSectionPerVolume() of G4DNABornExcitationModel" << G4endl;
183
184  if (
185      particleDefinition != G4Proton::ProtonDefinition()
186      &&
187      particleDefinition != G4Electron::ElectronDefinition()
188     )
189           
190    return 0;
191
192 // Calculate total cross section for model
193
194  G4double lowLim = 0;
195  G4double highLim = 0;
196  G4double sigma=0;
197
198  if (material->GetName() == "G4_WATER")
199  {
200    const G4String& particleName = particleDefinition->GetParticleName();
201 
202    std::map< G4String,G4double,std::less<G4String> >::iterator pos1;
203    pos1 = lowEnergyLimit.find(particleName);
204    if (pos1 != lowEnergyLimit.end())
205    {
206      lowLim = pos1->second;
207    }
208 
209    std::map< G4String,G4double,std::less<G4String> >::iterator pos2;
210    pos2 = highEnergyLimit.find(particleName);
211    if (pos2 != highEnergyLimit.end())
212    {
213      highLim = pos2->second;
214    }
215
216    if (ekin >= lowLim && ekin < highLim)
217    {
218      std::map< G4String,G4DNACrossSectionDataSet*,std::less<G4String> >::iterator pos;
219      pos = tableData.find(particleName);
220       
221      if (pos != tableData.end())
222      {
223        G4DNACrossSectionDataSet* table = pos->second;
224        if (table != 0)
225        {
226          sigma = table->FindValue(ekin);
227        }
228      }
229      else
230      {
231        G4Exception("G4DNABornExcitationModel::CrossSectionPerVolume: attempting to calculate cross section for wrong particle");
232      }
233    }
234
235    if (verboseLevel > 3)
236    {
237      G4cout << "---> Kinetic energy(eV)=" << ekin/eV << G4endl;
238      G4cout << " - Cross section per water molecule (cm^2)=" << sigma/cm/cm << G4endl;
239      G4cout << " - Cross section per water molecule (cm^-1)=" << sigma*material->GetAtomicNumDensityVector()[1]/(1./cm) << G4endl;
240    } 
241 
242  } // if (waterMaterial)
243 
244 return sigma*material->GetAtomicNumDensityVector()[1];           
245           
246
247}
248
249//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
250
251void G4DNABornExcitationModel::SampleSecondaries(std::vector<G4DynamicParticle*>* /*fvect*/,
252                                              const G4MaterialCutsCouple* /*couple*/,
253                                              const G4DynamicParticle* aDynamicParticle,
254                                              G4double,
255                                              G4double)
256{
257
258  if (verboseLevel > 3)
259    G4cout << "Calling SampleSecondaries() of G4DNABornExcitationModel" << G4endl;
260
261  G4double k = aDynamicParticle->GetKineticEnergy();
262 
263  const G4String& particleName = aDynamicParticle->GetDefinition()->GetParticleName();
264
265  G4int level = RandomSelect(k,particleName);
266  G4double excitationEnergy = waterStructure.ExcitationEnergy(level);
267  G4double newEnergy = k - excitationEnergy;
268 
269  if (newEnergy > 0)
270  {
271      fParticleChangeForGamma->ProposeMomentumDirection(aDynamicParticle->GetMomentumDirection());
272      fParticleChangeForGamma->SetProposedKineticEnergy(newEnergy);
273      fParticleChangeForGamma->ProposeLocalEnergyDeposit(excitationEnergy);
274  }
275
276}
277
278//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
279
280G4int G4DNABornExcitationModel::RandomSelect(G4double k, const G4String& particle)
281{   
282  G4int level = 0;
283
284  std::map< G4String,G4DNACrossSectionDataSet*,std::less<G4String> >::iterator pos;
285  pos = tableData.find(particle);
286
287  if (pos != tableData.end())
288  {
289    G4DNACrossSectionDataSet* table = pos->second;
290
291    if (table != 0)
292    {
293      G4double* valuesBuffer = new G4double[table->NumberOfComponents()];
294      const size_t n(table->NumberOfComponents());
295      size_t i(n);
296      G4double value = 0.;
297           
298      while (i>0)
299      { 
300        i--;
301        valuesBuffer[i] = table->GetComponent(i)->FindValue(k);
302        value += valuesBuffer[i];
303      }
304           
305      value *= G4UniformRand();
306   
307      i = n;
308           
309      while (i > 0)
310      {
311        i--;
312
313        if (valuesBuffer[i] > value)
314        {
315          delete[] valuesBuffer;
316          return i;
317        }
318        value -= valuesBuffer[i];
319      }
320           
321      if (valuesBuffer) delete[] valuesBuffer;
322   
323    }
324  }
325  else
326  {
327    G4Exception("G4DNABornExcitationModel::RandomSelect attempting to calculate cross section for wrong particle");
328  }
329  return level;
330}
331
332
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