source: trunk/source/processes/electromagnetic/lowenergy/src/G4DNABornIonisationModel.cc @ 1340

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26// $Id: G4DNABornIonisationModel.cc,v 1.18 2010/11/03 12:22:36 sincerti Exp $
27// GEANT4 tag $Name: emlowen-V09-03-54 $
28//
29
30#include "G4DNABornIonisationModel.hh"
31//#include "G4DynamicMolecule.hh"
32
33//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
34
35using namespace std;
36
37//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
38
39G4DNABornIonisationModel::G4DNABornIonisationModel(const G4ParticleDefinition*,
40                                             const G4String& nam)
41:G4VEmModel(nam),isInitialised(false)
42{
43  verboseLevel= 0;
44  // Verbosity scale:
45  // 0 = nothing
46  // 1 = warning for energy non-conservation
47  // 2 = details of energy budget
48  // 3 = calculation of cross sections, file openings, sampling of atoms
49  // 4 = entering in methods
50 
51  if( verboseLevel>0 ) 
52  { 
53    G4cout << "Born ionisation model is constructed " << G4endl;
54  }
55}
56
57//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
58
59G4DNABornIonisationModel::~G4DNABornIonisationModel()
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  // Final state
71 
72  eVecm.clear();
73  pVecm.clear();
74
75}
76
77//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
78
79void G4DNABornIonisationModel::Initialise(const G4ParticleDefinition* particle,
80                                       const G4DataVector& /*cuts*/)
81{
82
83  if (verboseLevel > 3)
84    G4cout << "Calling G4DNABornIonisationModel::Initialise()" << G4endl;
85
86  // Energy limits
87
88  G4String fileElectron("dna/sigma_ionisation_e_born");
89  G4String fileProton("dna/sigma_ionisation_p_born");
90
91  G4ParticleDefinition* electronDef = G4Electron::ElectronDefinition();
92  G4ParticleDefinition* protonDef = G4Proton::ProtonDefinition();
93
94  G4String electron;
95  G4String proton;
96 
97  G4double scaleFactor = (1.e-22 / 3.343) * m*m;
98
99  char *path = getenv("G4LEDATA");
100
101  if (electronDef != 0)
102  {
103    electron = electronDef->GetParticleName();
104
105    tableFile[electron] = fileElectron;
106
107    lowEnergyLimit[electron] = 11. * eV; 
108    highEnergyLimit[electron] = 1. * MeV;
109
110    // Cross section
111   
112    G4DNACrossSectionDataSet* tableE = new G4DNACrossSectionDataSet(new G4LogLogInterpolation, eV,scaleFactor );
113    tableE->LoadData(fileElectron);
114     
115    tableData[electron] = tableE;
116   
117    // Final state
118   
119    std::ostringstream eFullFileName;
120    eFullFileName << path << "/dna/sigmadiff_ionisation_e_born.dat";
121    std::ifstream eDiffCrossSection(eFullFileName.str().c_str());
122
123    if (!eDiffCrossSection)
124    { 
125      G4Exception("G4DNABornIonisationModel::ERROR OPENING electron DATA FILE");
126    }
127     
128    eTdummyVec.push_back(0.);
129    while(!eDiffCrossSection.eof())
130    {
131      double tDummy;
132      double eDummy;
133      eDiffCrossSection>>tDummy>>eDummy;
134      if (tDummy != eTdummyVec.back()) eTdummyVec.push_back(tDummy);
135      for (int j=0; j<5; j++)
136      {
137        eDiffCrossSection>>eDiffCrossSectionData[j][tDummy][eDummy];
138
139        // SI - only if eof is not reached !
140        if (!eDiffCrossSection.eof()) eDiffCrossSectionData[j][tDummy][eDummy]*=scaleFactor;
141
142        eVecm[tDummy].push_back(eDummy);
143
144      }
145    }
146
147    //
148  }
149  else
150  {
151    G4Exception("G4DNABornIonisationModel::Initialise(): electron is not defined");
152  }
153
154  if (protonDef != 0)
155  {
156    proton = protonDef->GetParticleName();
157
158    tableFile[proton] = fileProton;
159
160    lowEnergyLimit[proton] = 500. * keV;
161    highEnergyLimit[proton] = 100. * MeV;
162
163    // Cross section
164   
165    G4DNACrossSectionDataSet* tableP = new G4DNACrossSectionDataSet(new G4LogLogInterpolation, eV,scaleFactor );
166    tableP->LoadData(fileProton);
167     
168    tableData[proton] = tableP;
169   
170    // Final state
171
172    std::ostringstream pFullFileName;
173    pFullFileName << path << "/dna/sigmadiff_ionisation_p_born.dat";
174    std::ifstream pDiffCrossSection(pFullFileName.str().c_str());
175   
176    if (!pDiffCrossSection)
177    { 
178      G4Exception("G4DNABornIonisationModel::ERROR OPENING proton DATA FILE");
179    }
180     
181    pTdummyVec.push_back(0.);
182    while(!pDiffCrossSection.eof())
183    {
184      double tDummy;
185      double eDummy;
186      pDiffCrossSection>>tDummy>>eDummy;
187      if (tDummy != pTdummyVec.back()) pTdummyVec.push_back(tDummy);
188      for (int j=0; j<5; j++)
189      {
190        pDiffCrossSection>>pDiffCrossSectionData[j][tDummy][eDummy];
191
192        // SI - only if eof is not reached !
193        if (!pDiffCrossSection.eof()) pDiffCrossSectionData[j][tDummy][eDummy]*=scaleFactor;
194
195        pVecm[tDummy].push_back(eDummy);
196      }
197    }
198 
199  }
200  else
201  {
202    G4Exception("G4DNABornIonisationModel::Initialise(): proton is not defined");
203  }
204
205  if (particle==electronDef) 
206  {
207    SetLowEnergyLimit(lowEnergyLimit[electron]);
208    SetHighEnergyLimit(highEnergyLimit[electron]);
209  }
210
211  if (particle==protonDef) 
212  {
213    SetLowEnergyLimit(lowEnergyLimit[proton]);
214    SetHighEnergyLimit(highEnergyLimit[proton]);
215  }
216
217  if( verboseLevel>0 ) 
218  { 
219    G4cout << "Born ionisation model is initialized " << G4endl
220           << "Energy range: "
221           << LowEnergyLimit() / eV << " eV - "
222           << HighEnergyLimit() / keV << " keV for "
223           << particle->GetParticleName()
224           << G4endl;
225  }
226 
227  //
228 
229  if(!isInitialised) 
230  {
231    isInitialised = true;
232 
233    if(pParticleChange)
234      fParticleChangeForGamma = reinterpret_cast<G4ParticleChangeForGamma*>(pParticleChange);
235    else
236      fParticleChangeForGamma = new G4ParticleChangeForGamma();
237  }   
238
239  // InitialiseElementSelectors(particle,cuts);
240
241}
242
243//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
244
245G4double G4DNABornIonisationModel::CrossSectionPerVolume(const G4Material* material,
246                                           const G4ParticleDefinition* particleDefinition,
247                                           G4double ekin,
248                                           G4double,
249                                           G4double)
250{
251  if (verboseLevel > 3)
252    G4cout << "Calling CrossSectionPerVolume() of G4DNABornIonisationModel" << G4endl;
253
254  if (
255      particleDefinition != G4Proton::ProtonDefinition()
256      &&
257      particleDefinition != G4Electron::ElectronDefinition()
258     )
259           
260    return 0;
261 
262  // Calculate total cross section for model
263
264  G4double lowLim = 0;
265  G4double highLim = 0;
266  G4double sigma=0;
267
268  if (material->GetName() == "G4_WATER")
269  {
270    const G4String& particleName = particleDefinition->GetParticleName();
271 
272    std::map< G4String,G4double,std::less<G4String> >::iterator pos1;
273    pos1 = lowEnergyLimit.find(particleName);
274    if (pos1 != lowEnergyLimit.end())
275    {
276      lowLim = pos1->second;
277    }
278 
279    std::map< G4String,G4double,std::less<G4String> >::iterator pos2;
280    pos2 = highEnergyLimit.find(particleName);
281    if (pos2 != highEnergyLimit.end())
282    {
283      highLim = pos2->second;
284    }
285
286    if (ekin >= lowLim && ekin < highLim)
287    {
288      std::map< G4String,G4DNACrossSectionDataSet*,std::less<G4String> >::iterator pos;
289      pos = tableData.find(particleName);
290       
291      if (pos != tableData.end())
292      {
293        G4DNACrossSectionDataSet* table = pos->second;
294        if (table != 0)
295        {
296          sigma = table->FindValue(ekin);
297        }
298      }
299      else
300      {
301        G4Exception("G4DNABornIonisationModel::CrossSectionPerVolume: attempting to calculate cross section for wrong particle");
302      }
303    }
304
305    if (verboseLevel > 3)
306    {
307      G4cout << "---> Kinetic energy(eV)=" << ekin/eV << G4endl;
308      G4cout << " - Cross section per water molecule (cm^2)=" << sigma/cm/cm << G4endl;
309      G4cout << " - Cross section per water molecule (cm^-1)=" << sigma*material->GetAtomicNumDensityVector()[1]/(1./cm) << G4endl;
310    } 
311 
312  } // if (waterMaterial)
313 
314 return sigma*material->GetAtomicNumDensityVector()[1];           
315
316}
317
318//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
319
320void G4DNABornIonisationModel::SampleSecondaries(std::vector<G4DynamicParticle*>* fvect,
321                                              const G4MaterialCutsCouple* /*couple*/,
322                                              const G4DynamicParticle* particle,
323                                              G4double,
324                                              G4double)
325{
326
327  if (verboseLevel > 3)
328    G4cout << "Calling SampleSecondaries() of G4DNABornIonisationModel" << G4endl;
329
330  G4double lowLim = 0;
331  G4double highLim = 0;
332
333  G4double k = particle->GetKineticEnergy();
334
335  const G4String& particleName = particle->GetDefinition()->GetParticleName();
336
337  std::map< G4String,G4double,std::less<G4String> >::iterator pos1;
338  pos1 = lowEnergyLimit.find(particleName);
339
340  if (pos1 != lowEnergyLimit.end())
341  {
342    lowLim = pos1->second;
343  }
344
345  std::map< G4String,G4double,std::less<G4String> >::iterator pos2;
346  pos2 = highEnergyLimit.find(particleName);
347
348  if (pos2 != highEnergyLimit.end())
349  {
350    highLim = pos2->second;
351  }
352
353  if (k >= lowLim && k < highLim)
354  {
355    G4ParticleMomentum primaryDirection = particle->GetMomentumDirection();
356    G4double particleMass = particle->GetDefinition()->GetPDGMass();
357    G4double totalEnergy = k + particleMass;
358    G4double pSquare = k * (totalEnergy + particleMass);
359    G4double totalMomentum = std::sqrt(pSquare);
360
361    G4int ionizationShell = RandomSelect(k,particleName);
362 
363    G4double secondaryKinetic = RandomizeEjectedElectronEnergy(particle->GetDefinition(),k,ionizationShell);
364 
365    G4double bindingEnergy = waterStructure.IonisationEnergy(ionizationShell);
366
367    G4double cosTheta = 0.;
368    G4double phi = 0.; 
369    RandomizeEjectedElectronDirection(particle->GetDefinition(), k,secondaryKinetic, cosTheta, phi);
370
371    G4double sinTheta = std::sqrt(1.-cosTheta*cosTheta);
372    G4double dirX = sinTheta*std::cos(phi);
373    G4double dirY = sinTheta*std::sin(phi);
374    G4double dirZ = cosTheta;
375    G4ThreeVector deltaDirection(dirX,dirY,dirZ);
376    deltaDirection.rotateUz(primaryDirection);
377
378    if (particle->GetDefinition() == G4Electron::ElectronDefinition())
379    {
380      G4double deltaTotalMomentum = std::sqrt(secondaryKinetic*(secondaryKinetic + 2.*electron_mass_c2 ));
381
382      G4double finalPx = totalMomentum*primaryDirection.x() - deltaTotalMomentum*deltaDirection.x();
383      G4double finalPy = totalMomentum*primaryDirection.y() - deltaTotalMomentum*deltaDirection.y();
384      G4double finalPz = totalMomentum*primaryDirection.z() - deltaTotalMomentum*deltaDirection.z();
385      G4double finalMomentum = std::sqrt(finalPx*finalPx + finalPy*finalPy + finalPz*finalPz);
386      finalPx /= finalMomentum;
387      finalPy /= finalMomentum;
388      finalPz /= finalMomentum;
389   
390      G4ThreeVector direction;
391      direction.set(finalPx,finalPy,finalPz);
392   
393      fParticleChangeForGamma->ProposeMomentumDirection(direction.unit()) ;
394    }
395   
396    else fParticleChangeForGamma->ProposeMomentumDirection(primaryDirection) ;
397   
398    fParticleChangeForGamma->SetProposedKineticEnergy(k-bindingEnergy-secondaryKinetic);
399    fParticleChangeForGamma->ProposeLocalEnergyDeposit(bindingEnergy);
400
401    G4DynamicParticle* dp = new G4DynamicParticle (G4Electron::Electron(),deltaDirection,secondaryKinetic) ;
402    fvect->push_back(dp);
403
404  }
405
406}
407
408//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
409
410G4double G4DNABornIonisationModel::RandomizeEjectedElectronEnergy(G4ParticleDefinition* particleDefinition, 
411G4double k, G4int shell)
412{
413  if (particleDefinition == G4Electron::ElectronDefinition()) 
414  {
415    G4double maximumEnergyTransfer=0.;
416    if ((k+waterStructure.IonisationEnergy(shell))/2. > k) maximumEnergyTransfer=k;
417    else maximumEnergyTransfer = (k+waterStructure.IonisationEnergy(shell))/2.;
418   
419// SI : original method
420/*
421    G4double crossSectionMaximum = 0.;
422    for(G4double value=waterStructure.IonisationEnergy(shell); value<=maximumEnergyTransfer; value+=0.1*eV)
423    {
424      G4double differentialCrossSection = DifferentialCrossSection(particleDefinition, k/eV, value/eV, shell);
425      if(differentialCrossSection >= crossSectionMaximum) crossSectionMaximum = differentialCrossSection;
426    }
427*/
428
429 
430// SI : alternative method
431
432    G4double crossSectionMaximum = 0.;
433
434    G4double minEnergy = waterStructure.IonisationEnergy(shell);
435    G4double maxEnergy = maximumEnergyTransfer;
436    G4int nEnergySteps = 50;
437
438    G4double value(minEnergy);
439    G4double stpEnergy(std::pow(maxEnergy/value, 1./static_cast<G4double>(nEnergySteps-1)));
440    G4int step(nEnergySteps);
441    while (step>0)
442    {
443      step--;
444      G4double differentialCrossSection = DifferentialCrossSection(particleDefinition, k/eV, value/eV, shell);
445      if(differentialCrossSection >= crossSectionMaximum) crossSectionMaximum = differentialCrossSection;
446      value*=stpEnergy;
447    }
448//
449 
450    G4double secondaryElectronKineticEnergy=0.;
451    do 
452    {
453      secondaryElectronKineticEnergy = G4UniformRand() * (maximumEnergyTransfer-waterStructure.IonisationEnergy(shell));
454    } while(G4UniformRand()*crossSectionMaximum >
455      DifferentialCrossSection(particleDefinition, k/eV,(secondaryElectronKineticEnergy+waterStructure.IonisationEnergy(shell))/eV,shell));
456
457    return secondaryElectronKineticEnergy;
458 
459  }
460 
461  if (particleDefinition == G4Proton::ProtonDefinition()) 
462  {
463    G4double maximumKineticEnergyTransfer = 4.* (electron_mass_c2 / proton_mass_c2) * k;
464
465    G4double crossSectionMaximum = 0.;
466    for (G4double value = waterStructure.IonisationEnergy(shell); 
467         value<=4.*waterStructure.IonisationEnergy(shell) ; 
468         value+=0.1*eV)
469    {
470      G4double differentialCrossSection = DifferentialCrossSection(particleDefinition, k/eV, value/eV, shell);
471      if (differentialCrossSection >= crossSectionMaximum) crossSectionMaximum = differentialCrossSection;
472    }
473
474    G4double secondaryElectronKineticEnergy = 0.;
475    do
476    {
477      secondaryElectronKineticEnergy = G4UniformRand() * maximumKineticEnergyTransfer;
478    } while(G4UniformRand()*crossSectionMaximum >= 
479              DifferentialCrossSection(particleDefinition, k/eV,(secondaryElectronKineticEnergy+waterStructure.IonisationEnergy(shell))/eV,shell));
480
481    return secondaryElectronKineticEnergy;
482  }
483
484  return 0;
485}
486
487//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
488
489void G4DNABornIonisationModel::RandomizeEjectedElectronDirection(G4ParticleDefinition* particleDefinition, 
490                                                                   G4double k, 
491                                                                   G4double secKinetic, 
492                                                                   G4double & cosTheta, 
493                                                                   G4double & phi )
494{
495  if (particleDefinition == G4Electron::ElectronDefinition()) 
496  {
497    phi = twopi * G4UniformRand();
498    if (secKinetic < 50.*eV) cosTheta = (2.*G4UniformRand())-1.;
499    else if (secKinetic <= 200.*eV)     
500    {
501      if (G4UniformRand() <= 0.1) cosTheta = (2.*G4UniformRand())-1.;
502      else cosTheta = G4UniformRand()*(std::sqrt(2.)/2);
503    }
504    else       
505    {
506      G4double sin2O = (1.-secKinetic/k) / (1.+secKinetic/(2.*electron_mass_c2));
507      cosTheta = std::sqrt(1.-sin2O);
508    }
509  }
510 
511  if (particleDefinition == G4Proton::ProtonDefinition()) 
512  {
513    G4double maxSecKinetic = 4.* (electron_mass_c2 / proton_mass_c2) * k;
514    phi = twopi * G4UniformRand();
515   
516    // cosTheta = std::sqrt(secKinetic / maxSecKinetic);
517   
518    // Restriction below 100 eV from Emfietzoglou (2000)
519   
520    if (secKinetic>100*eV) cosTheta = std::sqrt(secKinetic / maxSecKinetic);
521    else cosTheta = (2.*G4UniformRand())-1.;
522       
523  }                     
524}
525
526//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
527
528double G4DNABornIonisationModel::DifferentialCrossSection(G4ParticleDefinition * particleDefinition, 
529                                                            G4double k, 
530                                                            G4double energyTransfer, 
531                                                            G4int ionizationLevelIndex)
532{
533  G4double sigma = 0.;
534
535  if (energyTransfer >= waterStructure.IonisationEnergy(ionizationLevelIndex))
536  {
537    G4double valueT1 = 0;
538    G4double valueT2 = 0;
539    G4double valueE21 = 0;
540    G4double valueE22 = 0;
541    G4double valueE12 = 0;
542    G4double valueE11 = 0;
543
544    G4double xs11 = 0;   
545    G4double xs12 = 0; 
546    G4double xs21 = 0; 
547    G4double xs22 = 0; 
548
549    if (particleDefinition == G4Electron::ElectronDefinition()) 
550    {
551      // k should be in eV and energy transfer eV also
552
553      std::vector<double>::iterator t2 = std::upper_bound(eTdummyVec.begin(),eTdummyVec.end(), k);
554
555      std::vector<double>::iterator t1 = t2-1;
556
557      // SI : the following condition avoids situations where energyTransfer >last vector element
558      if (energyTransfer <= eVecm[(*t1)].back() && energyTransfer <= eVecm[(*t2)].back() )
559      {
560        std::vector<double>::iterator e12 = std::upper_bound(eVecm[(*t1)].begin(),eVecm[(*t1)].end(), energyTransfer);
561        std::vector<double>::iterator e11 = e12-1;
562
563        std::vector<double>::iterator e22 = std::upper_bound(eVecm[(*t2)].begin(),eVecm[(*t2)].end(), energyTransfer);
564        std::vector<double>::iterator e21 = e22-1;
565
566        valueT1  =*t1;
567        valueT2  =*t2;
568        valueE21 =*e21;
569        valueE22 =*e22;
570        valueE12 =*e12;
571        valueE11 =*e11;
572
573        xs11 = eDiffCrossSectionData[ionizationLevelIndex][valueT1][valueE11];
574        xs12 = eDiffCrossSectionData[ionizationLevelIndex][valueT1][valueE12];
575        xs21 = eDiffCrossSectionData[ionizationLevelIndex][valueT2][valueE21];
576        xs22 = eDiffCrossSectionData[ionizationLevelIndex][valueT2][valueE22];
577      }
578
579    }
580 
581   if (particleDefinition == G4Proton::ProtonDefinition()) 
582   {
583      // k should be in eV and energy transfer eV also
584      std::vector<double>::iterator t2 = std::upper_bound(pTdummyVec.begin(),pTdummyVec.end(), k);
585      std::vector<double>::iterator t1 = t2-1;
586     
587        std::vector<double>::iterator e12 = std::upper_bound(pVecm[(*t1)].begin(),pVecm[(*t1)].end(), energyTransfer);
588        std::vector<double>::iterator e11 = e12-1;
589
590        std::vector<double>::iterator e22 = std::upper_bound(pVecm[(*t2)].begin(),pVecm[(*t2)].end(), energyTransfer);
591        std::vector<double>::iterator e21 = e22-1;
592 
593        valueT1  =*t1;
594        valueT2  =*t2;
595        valueE21 =*e21;
596        valueE22 =*e22;
597        valueE12 =*e12;
598        valueE11 =*e11;
599
600        xs11 = pDiffCrossSectionData[ionizationLevelIndex][valueT1][valueE11];
601        xs12 = pDiffCrossSectionData[ionizationLevelIndex][valueT1][valueE12];
602        xs21 = pDiffCrossSectionData[ionizationLevelIndex][valueT2][valueE21];
603        xs22 = pDiffCrossSectionData[ionizationLevelIndex][valueT2][valueE22];
604
605   }
606 
607   G4double xsProduct = xs11 * xs12 * xs21 * xs22;
608   if (xsProduct != 0.)
609   {
610     sigma = QuadInterpolator(     valueE11, valueE12, 
611                                   valueE21, valueE22, 
612                                   xs11, xs12, 
613                                   xs21, xs22, 
614                                   valueT1, valueT2, 
615                                   k, energyTransfer);
616   }
617 
618 }
619 
620  return sigma;
621}
622
623//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
624
625G4double G4DNABornIonisationModel::LogLogInterpolate(G4double e1, 
626                                                       G4double e2, 
627                                                       G4double e, 
628                                                       G4double xs1, 
629                                                       G4double xs2)
630{
631  G4double a = (std::log10(xs2)-std::log10(xs1)) / (std::log10(e2)-std::log10(e1));
632  G4double b = std::log10(xs2) - a*std::log10(e2);
633  G4double sigma = a*std::log10(e) + b;
634  G4double value = (std::pow(10.,sigma));
635  return value;
636}
637
638//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
639
640G4double G4DNABornIonisationModel::QuadInterpolator(G4double e11, G4double e12, 
641                                                      G4double e21, G4double e22, 
642                                                      G4double xs11, G4double xs12, 
643                                                      G4double xs21, G4double xs22, 
644                                                      G4double t1, G4double t2, 
645                                                      G4double t, G4double e)
646{
647  G4double interpolatedvalue1 = LogLogInterpolate(e11, e12, e, xs11, xs12);
648  G4double interpolatedvalue2 = LogLogInterpolate(e21, e22, e, xs21, xs22);
649  G4double value = LogLogInterpolate(t1, t2, t, interpolatedvalue1, interpolatedvalue2);
650  return value;
651}
652
653//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
654
655G4int G4DNABornIonisationModel::RandomSelect(G4double k, const G4String& particle )
656{   
657  G4int level = 0;
658
659  std::map< G4String,G4DNACrossSectionDataSet*,std::less<G4String> >::iterator pos;
660  pos = tableData.find(particle);
661
662  if (pos != tableData.end())
663  {
664    G4DNACrossSectionDataSet* table = pos->second;
665
666    if (table != 0)
667    {
668      G4double* valuesBuffer = new G4double[table->NumberOfComponents()];
669      const size_t n(table->NumberOfComponents());
670      size_t i(n);
671      G4double value = 0.;
672           
673      while (i>0)
674      { 
675        i--;
676        valuesBuffer[i] = table->GetComponent(i)->FindValue(k);
677        value += valuesBuffer[i];
678      }
679           
680      value *= G4UniformRand();
681   
682      i = n;
683           
684      while (i > 0)
685      {
686        i--;
687
688        if (valuesBuffer[i] > value)
689        {
690          delete[] valuesBuffer;
691          return i;
692        }
693        value -= valuesBuffer[i];
694      }
695           
696      if (valuesBuffer) delete[] valuesBuffer;
697   
698    }
699  }
700  else
701  {
702    G4Exception("G4DNABornIonisationModel::RandomSelect attempting to calculate cross section for wrong particle");
703  }
704     
705  return level;
706}
707
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