source: trunk/source/processes/electromagnetic/lowenergy/src/G4DNASancheExcitationModel.cc @ 1350

Last change on this file since 1350 was 1350, checked in by garnier, 13 years ago

update to last version 4.9.4
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26// $Id: G4DNASancheExcitationModel.cc,v 1.4 2010/11/11 22:32:22 sincerti Exp $
27// GEANT4 tag $Name: geant4-09-04-ref-00 $
28//
29
30// Created by Z. Francis
31
32#include "G4DNASancheExcitationModel.hh"
33
34//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
35
36using namespace std;
37
38//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
39
40G4DNASancheExcitationModel::G4DNASancheExcitationModel(const G4ParticleDefinition*,
41                                             const G4String& nam)
42:G4VEmModel(nam),isInitialised(false)
43{
44
45  lowEnergyLimit = 2 * eV; 
46  highEnergyLimit = 100 * eV;
47  SetLowEnergyLimit(lowEnergyLimit);
48  SetHighEnergyLimit(highEnergyLimit);
49  nLevels = 9;
50
51  verboseLevel= 0;
52  // Verbosity scale:
53  // 0 = nothing
54  // 1 = warning for energy non-conservation
55  // 2 = details of energy budget
56  // 3 = calculation of cross sections, file openings, sampling of atoms
57  // 4 = entering in methods
58 
59  if (verboseLevel > 0)
60  {
61    G4cout << "Sanche Excitation model is constructed " << G4endl
62           << "Energy range: "
63           << lowEnergyLimit / eV << " eV - "
64           << highEnergyLimit / eV << " eV"
65           << G4endl;
66  }
67 
68}
69
70//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
71
72G4DNASancheExcitationModel::~G4DNASancheExcitationModel()
73{}
74
75//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
76
77void G4DNASancheExcitationModel::Initialise(const G4ParticleDefinition* /*particle*/,
78                                       const G4DataVector& /*cuts*/)
79{
80 
81
82  if (verboseLevel > 3)
83    G4cout << "Calling G4DNASancheExcitationModel::Initialise()" << G4endl;
84
85  // Energy limits
86 
87  if (LowEnergyLimit() < lowEnergyLimit)
88  {
89    G4cout << "G4DNASancheExcitationModel: low energy limit increased from " << 
90        LowEnergyLimit()/eV << " eV to " << lowEnergyLimit/eV << " eV" << G4endl;
91    SetLowEnergyLimit(lowEnergyLimit);
92    }
93
94  if (HighEnergyLimit() > highEnergyLimit)
95  {
96    G4cout << "G4DNASancheExcitationModel: high energy limit decreased from " << 
97        HighEnergyLimit()/eV << " eV to " << highEnergyLimit/eV << " eV" << G4endl;
98    SetHighEnergyLimit(highEnergyLimit);
99  }
100
101  //
102
103  if (verboseLevel > 0)
104
105  G4cout << "Sanche Excitation model is initialized " << G4endl
106         << "Energy range: "
107         << LowEnergyLimit() / eV << " eV - "
108         << HighEnergyLimit() / eV << " eV"
109         << G4endl;
110
111  if(!isInitialised) 
112  {
113    isInitialised = true;
114 
115    if(pParticleChange)
116      fParticleChangeForGamma = reinterpret_cast<G4ParticleChangeForGamma*>(pParticleChange);
117    else
118      fParticleChangeForGamma = new G4ParticleChangeForGamma();
119  }   
120
121  // InitialiseElementSelectors(particle,cuts);
122
123  char *path = getenv("G4LEDATA");
124  std::ostringstream eFullFileName;
125  eFullFileName << path << "/dna/sigma_excitationvib_e_sanche.dat";
126  std::ifstream input(eFullFileName.str().c_str());
127
128  if (!input)
129  { 
130    G4Exception("G4DNASancheExcitationModel:::ERROR OPENING XS DATA FILE");
131  }
132 
133  while(!input.eof())
134  {
135          double t;
136          input>>t;
137          tdummyVec.push_back(t);
138          input>>map1[t][0]>>map1[t][1]>>map1[t][2]>>map1[t][3]>>map1[t][4]>>map1[t][5]>>map1[t][6]>>map1[t][7]>>map1[t][8];
139          //G4cout<<t<<"  "<<map1[t][0]<<map1[t][1]<<map1[t][2]<<map1[t][3]<<map1[t][4]<<map1[t][5]<<map1[t][6]<<map1[t][7]<<map1[t][8]<<G4endl;
140  }
141
142}
143
144//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
145
146G4double G4DNASancheExcitationModel::CrossSectionPerVolume(const G4Material* material, 
147                                           const G4ParticleDefinition* particleDefinition,
148                                           G4double ekin,
149                                           G4double,
150                                           G4double)
151{
152 if (verboseLevel > 3)
153    G4cout << "Calling CrossSectionPerVolume() of G4DNASancheExcitationModel" << G4endl;
154
155 // Calculate total cross section for model
156
157 G4double sigma=0;
158 
159 if (material->GetName() == "G4_WATER")
160 {
161
162  if (particleDefinition == G4Electron::ElectronDefinition())
163  {
164    if (ekin >= lowEnergyLimit && ekin < highEnergyLimit)
165    {
166      sigma = Sum(ekin);
167    }
168  }
169 
170  if (verboseLevel > 3)
171  {
172    G4cout << "---> Kinetic energy(eV)=" << ekin/eV << G4endl;
173    G4cout << " - Cross section per water molecule (cm^2)=" << sigma/cm/cm << G4endl;
174    G4cout << " - Cross section per water molecule (cm^-1)=" << sigma*material->GetAtomicNumDensityVector()[1]/(1./cm) << G4endl;
175  } 
176
177 } // if water
178
179
180  return sigma*2*material->GetAtomicNumDensityVector()[1];
181  // see papers for factor 2 description                   
182
183}
184
185//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
186
187void G4DNASancheExcitationModel::SampleSecondaries(std::vector<G4DynamicParticle*>*,
188                                              const G4MaterialCutsCouple*,
189                                              const G4DynamicParticle* aDynamicElectron,
190                                              G4double,
191                                              G4double)
192{
193
194  if (verboseLevel > 3)
195    G4cout << "Calling SampleSecondaries() of G4DNASancheExcitationModel" << G4endl;
196
197  G4double electronEnergy0 = aDynamicElectron->GetKineticEnergy();
198  G4int level = RandomSelect(electronEnergy0);
199  G4double excitationEnergy = VibrationEnergy(level); // levels go from 0 to 8
200  G4double newEnergy = electronEnergy0 - excitationEnergy;
201 
202/*
203  if (electronEnergy0 < highEnergyLimit)
204  {
205    if (newEnergy >= lowEnergyLimit)
206    {
207      fParticleChangeForGamma->ProposeMomentumDirection(aDynamicElectron->GetMomentumDirection());
208      fParticleChangeForGamma->SetProposedKineticEnergy(newEnergy);
209      fParticleChangeForGamma->ProposeLocalEnergyDeposit(excitationEnergy);
210    }
211 
212    else   
213    {
214      fParticleChangeForGamma->ProposeTrackStatus(fStopAndKill);
215      fParticleChangeForGamma->ProposeLocalEnergyDeposit(electronEnergy0);
216    }
217  }
218*/
219
220  if (electronEnergy0 < highEnergyLimit && newEnergy>0.)
221  {
222      fParticleChangeForGamma->ProposeMomentumDirection(aDynamicElectron->GetMomentumDirection());
223      fParticleChangeForGamma->SetProposedKineticEnergy(newEnergy);
224      fParticleChangeForGamma->ProposeLocalEnergyDeposit(excitationEnergy);
225  }
226
227//
228}
229
230//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
231
232G4double G4DNASancheExcitationModel::PartialCrossSection(G4double t, G4int level)
233{
234  std::vector<double>::iterator t2 = std::upper_bound(tdummyVec.begin(),tdummyVec.end(), t/eV);
235  std::vector<double>::iterator t1 = t2-1;
236
237  double sigma = LinInterpolate((*t1), (*t2), t/eV, map1[*t1][level], map1[*t2][level]);
238  sigma*=1e-16*cm*cm;
239  if(sigma==0.)sigma=1e-30;
240  return (sigma);
241}
242
243//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
244
245G4double G4DNASancheExcitationModel::VibrationEnergy(G4int level)
246{
247  G4double energies[9] = {0.01, 0.024, 0.061, 0.092, 0.204, 0.417, 0.460, 0.500, 0.835};
248  return(energies[level]*eV);
249}
250
251//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
252
253G4int G4DNASancheExcitationModel::RandomSelect(G4double k)
254{
255
256  // Level Selection Counting can be done here !
257
258  G4int i = nLevels;
259  G4double value = 0.;
260  std::deque<double> values;
261 
262  while (i > 0)
263  {
264    i--;
265    G4double partial = PartialCrossSection(k,i);
266    values.push_front(partial);
267    value += partial;
268  }
269
270  value *= G4UniformRand();
271   
272  i = nLevels;
273
274  while (i > 0)
275  {
276    i--;
277    if (values[i] > value)
278    {
279      //outcount<<i<<"  "<<VibrationEnergy(i)<<G4endl;
280      return i;
281    }
282    value -= values[i];
283  }
284 
285  //outcount<<0<<"  "<<VibrationEnergy(0)<<G4endl;
286 
287  return 0;
288}
289
290//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
291
292G4double G4DNASancheExcitationModel::Sum(G4double k)
293{
294  G4double totalCrossSection = 0.;
295
296  for (G4int i=0; i<nLevels; i++)
297  {
298    totalCrossSection += PartialCrossSection(k,i);
299  }
300  return totalCrossSection;
301}
302
303//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
304
305G4double G4DNASancheExcitationModel::LinInterpolate(G4double e1, 
306                                                    G4double e2, 
307                                                    G4double e, 
308                                                    G4double xs1, 
309                                                    G4double xs2)
310{
311  G4double a = (xs2 - xs1) / (e2 - e1);
312  G4double b = xs2 - a*e2;
313  G4double value = a*e + b;
314  // G4cout<<"interP >>  "<<e1<<"  "<<e2<<"  "<<e<<"  "<<xs1<<"  "<<xs2<<"  "<<a<<"  "<<b<<"  "<<value<<G4endl;
315 
316  return value;
317}
318
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