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G4MuElecInelasticModel.cc
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27 // G4MuElecInelasticModel.cc, 2011/08/29 A.Valentin, M. Raine
28 //
29 // Based on the following publications
30 //
31 // - Inelastic cross-sections of low energy electrons in silicon
32 // for the simulation of heavy ion tracks with theGeant4-DNA toolkit,
33 // NSS Conf. Record 2010, pp. 80-85.
34 // - Geant4 physics processes for microdosimetry simulation:
35 // very low energy electromagnetic models for electrons in Si,
36 // NIM B, vol. 288, pp. 66 - 73, 2012.
37 // - Geant4 physics processes for microdosimetry simulation:
38 // very low energy electromagnetic models for protons and
39 // heavy ions in Si, NIM B, vol. 287, pp. 124 - 129, 2012.
40 //
41 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
42 
43 #include "G4MuElecInelasticModel.hh"
44 
45 #include "globals.hh"
46 #include "G4PhysicalConstants.hh"
47 #include "G4SystemOfUnits.hh"
48 #include "G4ios.hh"
49 #include "G4UnitsTable.hh"
50 #include "G4UAtomicDeexcitation.hh"
51 #include "G4LossTableManager.hh"
52 #include "G4ionEffectiveCharge.hh"
53 
54 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
55 
56 using namespace std;
57 
58 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
59 
60 G4MuElecInelasticModel::G4MuElecInelasticModel(const G4ParticleDefinition*,
61  const G4String& nam)
62 :G4VEmModel(nam),fAtomDeexcitation(0),isInitialised(false)
63 {
64 
65  G4cout << G4endl;
66  G4cout << "*******************************************************************************" << G4endl;
67  G4cout << "*******************************************************************************" << G4endl;
68  G4cout << " The name of the class G4MuElecInelasticModel is changed to G4MicroElecInelasticModel. " << G4endl;
69  G4cout << " The obsolete class will be REMOVED with the next release of Geant4. " << G4endl;
70  G4cout << "*******************************************************************************" << G4endl;
71  G4cout << "*******************************************************************************" << G4endl;
72  G4cout << G4endl;
73 
74  nistSi = G4NistManager::Instance()->FindOrBuildMaterial("G4_Si");
75 
76  verboseLevel= 0;
77  // Verbosity scale:
78  // 0 = nothing
79  // 1 = warning for energy non-conservation
80  // 2 = details of energy budget
81  // 3 = calculation of cross sections, file openings, sampling of atoms
82  // 4 = entering in methods
83 
84  if( verboseLevel>0 )
85  {
86  G4cout << "MuElec inelastic model is constructed " << G4endl;
87  }
88 
89  //Mark this model as "applicable" for atomic deexcitation
90  SetDeexcitationFlag(true);
91  fParticleChangeForGamma = 0;
92 }
93 
94 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
95 
96 G4MuElecInelasticModel::~G4MuElecInelasticModel()
97 {
98  // Cross section
99 
100  std::map< G4String,G4MuElecCrossSectionDataSet*,std::less<G4String> >::iterator pos;
101  for (pos = tableData.begin(); pos != tableData.end(); ++pos)
102  {
103  G4MuElecCrossSectionDataSet* table = pos->second;
104  delete table;
105  }
106 
107  // Final state
108 
109  eVecm.clear();
110  pVecm.clear();
111 
112 }
113 
114 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
115 
116 void G4MuElecInelasticModel::Initialise(const G4ParticleDefinition* particle,
117  const G4DataVector& /*cuts*/)
118 {
119 
120  if (verboseLevel > 3)
121  G4cout << "Calling G4MuElecInelasticModel::Initialise()" << G4endl;
122 
123  // Energy limits
124 
125  G4String fileElectron("microelec/sigma_inelastic_e_Si");
126  G4String fileProton("microelec/sigma_inelastic_p_Si");
127 
128  G4ParticleDefinition* electronDef = G4Electron::ElectronDefinition();
129  G4ParticleDefinition* protonDef = G4Proton::ProtonDefinition();
130 
131  G4String electron;
132  G4String proton;
133 
134  G4double scaleFactor = 1e-18 * cm *cm;
135 
136  char *path = getenv("G4LEDATA");
137 
138  // *** ELECTRON
139  electron = electronDef->GetParticleName();
140 
141  tableFile[electron] = fileElectron;
142 
143  lowEnergyLimit[electron] = 16.7 * eV;
144  highEnergyLimit[electron] = 100.0 * MeV;
145 
146  // Cross section
147 
148  G4MuElecCrossSectionDataSet* tableE = new G4MuElecCrossSectionDataSet(new G4LogLogInterpolation, eV,scaleFactor );
149  tableE->LoadData(fileElectron);
150 
151  tableData[electron] = tableE;
152 
153  // Final state
154 
155  std::ostringstream eFullFileName;
156  eFullFileName << path << "/microelec/sigmadiff_inelastic_e_Si.dat";
157  std::ifstream eDiffCrossSection(eFullFileName.str().c_str());
158 
159  if (!eDiffCrossSection)
160  {
161  G4Exception("G4MuElecInelasticModel::Initialise","em0003",FatalException,"Missing data file:/microelec/sigmadiff_inelastic_e_Si.dat");
162  }
163 
164  eTdummyVec.push_back(0.);
165  while(!eDiffCrossSection.eof())
166  {
167  double tDummy;
168  double eDummy;
169  eDiffCrossSection>>tDummy>>eDummy;
170  if (tDummy != eTdummyVec.back()) eTdummyVec.push_back(tDummy);
171  for (int j=0; j<6; j++)
172  {
173  eDiffCrossSection>>eDiffCrossSectionData[j][tDummy][eDummy];
174 
175  // SI - only if eof is not reached !
176  if (!eDiffCrossSection.eof()) eDiffCrossSectionData[j][tDummy][eDummy]*=scaleFactor;
177 
178  eVecm[tDummy].push_back(eDummy);
179 
180  }
181  }
182  //
183 
184  // *** PROTON
185 
186  proton = protonDef->GetParticleName();
187 
188  tableFile[proton] = fileProton;
189 
190  lowEnergyLimit[proton] = 50. * keV;
191  highEnergyLimit[proton] = 10. * GeV;
192 
193  // Cross section
194 
195  G4MuElecCrossSectionDataSet* tableP = new G4MuElecCrossSectionDataSet(new G4LogLogInterpolation, eV,scaleFactor );
196  tableP->LoadData(fileProton);
197 
198  tableData[proton] = tableP;
199 
200  // Final state
201 
202  std::ostringstream pFullFileName;
203  pFullFileName << path << "/microelec/sigmadiff_inelastic_p_Si.dat";
204  std::ifstream pDiffCrossSection(pFullFileName.str().c_str());
205 
206  if (!pDiffCrossSection)
207  {
208  G4Exception("G4MuElecInelasticModel::Initialise","em0003",FatalException,"Missing data file:/microelec/sigmadiff_inelastic_p_Si.dat");
209  }
210 
211  pTdummyVec.push_back(0.);
212  while(!pDiffCrossSection.eof())
213  {
214  double tDummy;
215  double eDummy;
216  pDiffCrossSection>>tDummy>>eDummy;
217  if (tDummy != pTdummyVec.back()) pTdummyVec.push_back(tDummy);
218  for (int j=0; j<6; j++)
219  {
220  pDiffCrossSection>>pDiffCrossSectionData[j][tDummy][eDummy];
221 
222  // SI - only if eof is not reached !
223  if (!pDiffCrossSection.eof()) pDiffCrossSectionData[j][tDummy][eDummy]*=scaleFactor;
224 
225  pVecm[tDummy].push_back(eDummy);
226  }
227  }
228 
229 
230  if (particle==electronDef)
231  {
232  SetLowEnergyLimit(lowEnergyLimit[electron]);
233  SetHighEnergyLimit(highEnergyLimit[electron]);
234  }
235 
236  if (particle==protonDef)
237  {
238  SetLowEnergyLimit(lowEnergyLimit[proton]);
239  SetHighEnergyLimit(highEnergyLimit[proton]);
240  }
241 
242  if( verboseLevel>0 )
243  {
244  G4cout << "MuElec Inelastic model is initialized " << G4endl
245  << "Energy range: "
246  << LowEnergyLimit() / eV << " eV - "
247  << HighEnergyLimit() / keV << " keV for "
248  << particle->GetParticleName()
249  << " with mass (amu) " << particle->GetPDGMass()/proton_mass_c2
250  << " and charge " << particle->GetPDGCharge()
251  << G4endl << G4endl ;
252  }
253 
254  //
255 
256  fAtomDeexcitation = G4LossTableManager::Instance()->AtomDeexcitation();
257 
258  if (isInitialised) { return; }
259  fParticleChangeForGamma = GetParticleChangeForGamma();
260  isInitialised = true;
261 
262 }
263 
264 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
265 
266 G4double G4MuElecInelasticModel::CrossSectionPerVolume(const G4Material* material,
267  const G4ParticleDefinition* particleDefinition,
268  G4double ekin,
269  G4double,
270  G4double)
271 {
272  if (verboseLevel > 3)
273  G4cout << "Calling CrossSectionPerVolume() of G4MuElecInelasticModel" << G4endl;
274 
275  G4double density = material->GetTotNbOfAtomsPerVolume();
276 
277  /* if (
278  particleDefinition != G4Proton::ProtonDefinition()
279  &&
280  particleDefinition != G4Electron::ElectronDefinition()
281  &&
282  particleDefinition != G4GenericIon::GenericIonDefinition()
283  )
284 
285  return 0;*/
286 
287  // Calculate total cross section for model
288 
289  G4double lowLim = 0;
290  G4double highLim = 0;
291  G4double sigma=0;
292 
293  const G4String& particleName = particleDefinition->GetParticleName();
294  G4String nameLocal = particleName ;
295 
296  G4double Zeff2 = 1.0;
297  G4double Mion_c2 = particleDefinition->GetPDGMass();
298 
299  if (Mion_c2 > proton_mass_c2)
300  {
301  G4ionEffectiveCharge EffCharge ;
302  G4double Zeff = EffCharge.EffectiveCharge(particleDefinition, material,ekin);
303  Zeff2 = Zeff*Zeff;
304 
305  if (verboseLevel > 3)
306  G4cout << "Before scaling : " << G4endl
307  << "Particle : " << nameLocal << ", mass : " << Mion_c2/proton_mass_c2 << "*mp, charge " << Zeff
308  << ", Ekin (eV) = " << ekin/eV << G4endl ;
309 
310  ekin *= proton_mass_c2/Mion_c2 ;
311  nameLocal = "proton" ;
312 
313  if (verboseLevel > 3)
314  G4cout << "After scaling : " << G4endl
315  << "Particle : " << nameLocal << ", Ekin (eV) = " << ekin/eV << G4endl ;
316  }
317 
318  if (material == nistSi || material->GetBaseMaterial() == nistSi)
319  {
320 
321  std::map< G4String,G4double,std::less<G4String> >::iterator pos1;
322  pos1 = lowEnergyLimit.find(nameLocal);
323  if (pos1 != lowEnergyLimit.end())
324  {
325  lowLim = pos1->second;
326  }
327 
328  std::map< G4String,G4double,std::less<G4String> >::iterator pos2;
329  pos2 = highEnergyLimit.find(nameLocal);
330  if (pos2 != highEnergyLimit.end())
331  {
332  highLim = pos2->second;
333  }
334 
335  if (ekin >= lowLim && ekin < highLim)
336  {
337  std::map< G4String,G4MuElecCrossSectionDataSet*,std::less<G4String> >::iterator pos;
338  pos = tableData.find(nameLocal);
339 
340  if (pos != tableData.end())
341  {
342  G4MuElecCrossSectionDataSet* table = pos->second;
343  if (table != 0)
344  {
345  sigma = table->FindValue(ekin);
346  }
347  }
348  else
349  {
350  G4Exception("G4MuElecInelasticModel::CrossSectionPerVolume","em0002",FatalException,"Model not applicable to particle type.");
351  }
352  }
353  else
354  {
355  if (nameLocal!="e-")
356  {
357  // G4cout << "Particle : " << nameLocal << ", Ekin (eV) = " << ekin/eV << G4endl;
358  // G4cout << "### Warning: particle energy out of bounds! ###" << G4endl;
359  }
360  }
361 
362  if (verboseLevel > 3)
363  {
364  G4cout << "---> Kinetic energy (eV)=" << ekin/eV << G4endl;
365  G4cout << " - Cross section per Si atom (cm^2)=" << sigma*Zeff2/cm2 << G4endl;
366  G4cout << " - Cross section per Si atom (cm^-1)=" << sigma*density*Zeff2/(1./cm) << G4endl;
367  }
368 
369  } // if (SiMaterial)
370  return sigma*density*Zeff2;
371 
372 
373 }
374 
375 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
376 
377 void G4MuElecInelasticModel::SampleSecondaries(std::vector<G4DynamicParticle*>* fvect,
378  const G4MaterialCutsCouple* /*couple*/,
379  const G4DynamicParticle* particle,
380  G4double,
381  G4double)
382 {
383 
384  if (verboseLevel > 3)
385  G4cout << "Calling SampleSecondaries() of G4MuElecInelasticModel" << G4endl;
386 
387  G4double lowLim = 0;
388  G4double highLim = 0;
389 
390  G4double ekin = particle->GetKineticEnergy();
391  G4double k = ekin ;
392 
393  G4ParticleDefinition* PartDef = particle->GetDefinition();
394  const G4String& particleName = PartDef->GetParticleName();
395  G4String nameLocal2 = particleName ;
396  G4double particleMass = particle->GetDefinition()->GetPDGMass();
397 
398  if (particleMass > proton_mass_c2)
399  {
400  k *= proton_mass_c2/particleMass ;
401  PartDef = G4Proton::ProtonDefinition();
402  nameLocal2 = "proton" ;
403  }
404 
405  std::map< G4String,G4double,std::less<G4String> >::iterator pos1;
406  pos1 = lowEnergyLimit.find(nameLocal2);
407 
408  if (pos1 != lowEnergyLimit.end())
409  {
410  lowLim = pos1->second;
411  }
412 
413  std::map< G4String,G4double,std::less<G4String> >::iterator pos2;
414  pos2 = highEnergyLimit.find(nameLocal2);
415 
416  if (pos2 != highEnergyLimit.end())
417  {
418  highLim = pos2->second;
419  }
420 
421  if (k >= lowLim && k < highLim)
422  {
423  G4ParticleMomentum primaryDirection = particle->GetMomentumDirection();
424  G4double totalEnergy = ekin + particleMass;
425  G4double pSquare = ekin * (totalEnergy + particleMass);
426  G4double totalMomentum = std::sqrt(pSquare);
427 
428  G4int Shell = RandomSelect(k,nameLocal2);
429  G4double bindingEnergy = SiStructure.Energy(Shell);
430  if (verboseLevel > 3)
431  {
432  G4cout << "---> Kinetic energy (eV)=" << k/eV << G4endl ;
433  G4cout << "Shell: " << Shell << ", energy: " << bindingEnergy/eV << G4endl;
434  }
435 
436  // sample deexcitation
437 
438  G4int secNumberInit = 0; // need to know at a certain point the energy of secondaries
439  G4int secNumberFinal = 0; // So I'll make the difference and then sum the energies
440 
441  if(fAtomDeexcitation && Shell > 2) {
442  G4int Z = 14;
443  G4AtomicShellEnumerator as = fKShell;
444 
445  if (Shell == 4)
446  {
447  as = G4AtomicShellEnumerator(1);
448  }
449  else if (Shell == 3)
450  {
451  as = G4AtomicShellEnumerator(3);
452  }
453 
454  const G4AtomicShell* shell = fAtomDeexcitation->GetAtomicShell(Z, as);
455  secNumberInit = fvect->size();
456  fAtomDeexcitation->GenerateParticles(fvect, shell, Z, 0, 0);
457  secNumberFinal = fvect->size();
458  }
459 
460  G4double secondaryKinetic = RandomizeEjectedElectronEnergy(PartDef,k,Shell);
461 
462  if (verboseLevel > 3)
463  {
464  G4cout << "Ionisation process" << G4endl;
465  G4cout << "Shell: " << Shell << " Kin. energy (eV)=" << k/eV
466  << " Sec. energy (eV)=" << secondaryKinetic/eV << G4endl;
467  }
468 
469  G4double cosTheta = 0.;
470  G4double phi = 0.;
471  RandomizeEjectedElectronDirection(PartDef, k, secondaryKinetic, cosTheta, phi);
472 
473  G4double sinTheta = std::sqrt(1.-cosTheta*cosTheta);
474  G4double dirX = sinTheta*std::cos(phi);
475  G4double dirY = sinTheta*std::sin(phi);
476  G4double dirZ = cosTheta;
477  G4ThreeVector deltaDirection(dirX,dirY,dirZ);
478  deltaDirection.rotateUz(primaryDirection);
479 
480  //if (particle->GetDefinition() == G4Electron::ElectronDefinition())
481  //{
482  G4double deltaTotalMomentum = std::sqrt(secondaryKinetic*(secondaryKinetic + 2.*electron_mass_c2 ));
483 
484  G4double finalPx = totalMomentum*primaryDirection.x() - deltaTotalMomentum*deltaDirection.x();
485  G4double finalPy = totalMomentum*primaryDirection.y() - deltaTotalMomentum*deltaDirection.y();
486  G4double finalPz = totalMomentum*primaryDirection.z() - deltaTotalMomentum*deltaDirection.z();
487  G4double finalMomentum = std::sqrt(finalPx*finalPx + finalPy*finalPy + finalPz*finalPz);
488  finalPx /= finalMomentum;
489  finalPy /= finalMomentum;
490  finalPz /= finalMomentum;
491 
492  G4ThreeVector direction;
493  direction.set(finalPx,finalPy,finalPz);
494 
495  fParticleChangeForGamma->ProposeMomentumDirection(direction.unit()) ;
496  //}
497  //else fParticleChangeForGamma->ProposeMomentumDirection(primaryDirection) ;
498 
499  // note that secondaryKinetic is the energy of the delta ray, not of all secondaries.
500  G4double deexSecEnergy = 0;
501  for (G4int j=secNumberInit; j < secNumberFinal; j++) {
502  deexSecEnergy = deexSecEnergy + (*fvect)[j]->GetKineticEnergy();}
503 
504  fParticleChangeForGamma->SetProposedKineticEnergy(ekin-bindingEnergy-secondaryKinetic);
505  fParticleChangeForGamma->ProposeLocalEnergyDeposit(bindingEnergy-deexSecEnergy);
506 
507  G4DynamicParticle* dp = new G4DynamicParticle (G4Electron::Electron(),deltaDirection,secondaryKinetic) ;
508  fvect->push_back(dp);
509 
510  }
511 
512 }
513 
514 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
515 
516 G4double G4MuElecInelasticModel::RandomizeEjectedElectronEnergy(G4ParticleDefinition* particleDefinition,
517 G4double k, G4int shell)
518 {
519  if (particleDefinition == G4Electron::ElectronDefinition())
520  {
521  G4double maximumEnergyTransfer=0.;
522  if ((k+SiStructure.Energy(shell))/2. > k) maximumEnergyTransfer=k;
523  else maximumEnergyTransfer = (k+SiStructure.Energy(shell))/2.;
524 
525  G4double crossSectionMaximum = 0.;
526 
527  G4double minEnergy = SiStructure.Energy(shell);
528  G4double maxEnergy = maximumEnergyTransfer;
529  G4int nEnergySteps = 100;
530 
531  G4double value(minEnergy);
532  G4double stpEnergy(std::pow(maxEnergy/value, 1./static_cast<G4double>(nEnergySteps-1)));
533  G4int step(nEnergySteps);
534  while (step>0)
535  {
536  step--;
537  G4double differentialCrossSection = DifferentialCrossSection(particleDefinition, k/eV, value/eV, shell);
538  if(differentialCrossSection >= crossSectionMaximum) crossSectionMaximum = differentialCrossSection;
539  value*=stpEnergy;
540  }
541 
542 
543  G4double secondaryElectronKineticEnergy=0.;
544  do
545  {
546  secondaryElectronKineticEnergy = G4UniformRand() * (maximumEnergyTransfer-SiStructure.Energy(shell));
547  } while(G4UniformRand()*crossSectionMaximum >
548  DifferentialCrossSection(particleDefinition, k/eV,(secondaryElectronKineticEnergy+SiStructure.Energy(shell))/eV,shell));
549 
550  return secondaryElectronKineticEnergy;
551 
552  }
553 
554  if (particleDefinition == G4Proton::ProtonDefinition())
555  {
556  G4double maximumEnergyTransfer = 4.* (electron_mass_c2 / proton_mass_c2) * k;
557  G4double crossSectionMaximum = 0.;
558 
559  G4double minEnergy = SiStructure.Energy(shell);
560  G4double maxEnergy = maximumEnergyTransfer;
561  G4int nEnergySteps = 100;
562 
563  G4double value(minEnergy);
564  G4double stpEnergy(std::pow(maxEnergy/value, 1./static_cast<G4double>(nEnergySteps-1)));
565  G4int step(nEnergySteps);
566  while (step>0)
567  {
568  step--;
569  G4double differentialCrossSection = DifferentialCrossSection(particleDefinition, k/eV, value/eV, shell);
570  if(differentialCrossSection >= crossSectionMaximum) crossSectionMaximum = differentialCrossSection;
571  value*=stpEnergy;
572  }
573  G4double secondaryElectronKineticEnergy = 0.;
574  do
575  {
576  secondaryElectronKineticEnergy = G4UniformRand() * (maximumEnergyTransfer-SiStructure.Energy(shell));
577 
578  } while(G4UniformRand()*crossSectionMaximum >=
579  DifferentialCrossSection(particleDefinition, k/eV,(secondaryElectronKineticEnergy+SiStructure.Energy(shell))/eV,shell));
580  return secondaryElectronKineticEnergy;
581  }
582 
583  return 0;
584 }
585 
586 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
587 
588 void G4MuElecInelasticModel::RandomizeEjectedElectronDirection(G4ParticleDefinition* particleDefinition,
589  G4double k,
590  G4double secKinetic,
591  G4double & cosTheta,
592  G4double & phi )
593 {
594  if (particleDefinition == G4Electron::ElectronDefinition())
595  {
596  phi = twopi * G4UniformRand();
597  G4double sin2O = (1.-secKinetic/k) / (1.+secKinetic/(2.*electron_mass_c2));
598  cosTheta = std::sqrt(1.-sin2O);
599  }
600 
601  if (particleDefinition == G4Proton::ProtonDefinition())
602  {
603  G4double maxSecKinetic = 4.* (electron_mass_c2 / proton_mass_c2) * k;
604  phi = twopi * G4UniformRand();
605  cosTheta = std::sqrt(secKinetic / maxSecKinetic);
606  }
607 
608  else
609  {
610  G4double maxSecKinetic = 4.* (electron_mass_c2 / particleDefinition->GetPDGMass()) * k;
611  phi = twopi * G4UniformRand();
612  cosTheta = std::sqrt(secKinetic / maxSecKinetic);
613  }
614 }
615 
616 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
617 
618 double G4MuElecInelasticModel::DifferentialCrossSection(G4ParticleDefinition * particleDefinition,
619  G4double k,
620  G4double energyTransfer,
621  G4int LevelIndex)
622 {
623  G4double sigma = 0.;
624 
625  if (energyTransfer >= SiStructure.Energy(LevelIndex))
626  {
627  G4double valueT1 = 0;
628  G4double valueT2 = 0;
629  G4double valueE21 = 0;
630  G4double valueE22 = 0;
631  G4double valueE12 = 0;
632  G4double valueE11 = 0;
633 
634  G4double xs11 = 0;
635  G4double xs12 = 0;
636  G4double xs21 = 0;
637  G4double xs22 = 0;
638 
639  if (particleDefinition == G4Electron::ElectronDefinition())
640  {
641  // k should be in eV and energy transfer eV also
642 
643  std::vector<double>::iterator t2 = std::upper_bound(eTdummyVec.begin(),eTdummyVec.end(), k);
644  std::vector<double>::iterator t1 = t2-1;
645  // SI : the following condition avoids situations where energyTransfer >last vector element
646  if (energyTransfer <= eVecm[(*t1)].back() && energyTransfer <= eVecm[(*t2)].back() )
647  {
648  std::vector<double>::iterator e12 = std::upper_bound(eVecm[(*t1)].begin(),eVecm[(*t1)].end(), energyTransfer);
649  std::vector<double>::iterator e11 = e12-1;
650 
651  std::vector<double>::iterator e22 = std::upper_bound(eVecm[(*t2)].begin(),eVecm[(*t2)].end(), energyTransfer);
652  std::vector<double>::iterator e21 = e22-1;
653 
654  valueT1 =*t1;
655  valueT2 =*t2;
656  valueE21 =*e21;
657  valueE22 =*e22;
658  valueE12 =*e12;
659  valueE11 =*e11;
660 
661  xs11 = eDiffCrossSectionData[LevelIndex][valueT1][valueE11];
662  xs12 = eDiffCrossSectionData[LevelIndex][valueT1][valueE12];
663  xs21 = eDiffCrossSectionData[LevelIndex][valueT2][valueE21];
664  xs22 = eDiffCrossSectionData[LevelIndex][valueT2][valueE22];
665  }
666 
667  }
668 
669  if (particleDefinition == G4Proton::ProtonDefinition())
670  {
671  // k should be in eV and energy transfer eV also
672  std::vector<double>::iterator t2 = std::upper_bound(pTdummyVec.begin(),pTdummyVec.end(), k);
673  std::vector<double>::iterator t1 = t2-1;
674  if (energyTransfer <= pVecm[(*t1)].back() && energyTransfer <= pVecm[(*t2)].back() )
675  {
676  std::vector<double>::iterator e12 = std::upper_bound(pVecm[(*t1)].begin(),pVecm[(*t1)].end(), energyTransfer);
677  std::vector<double>::iterator e11 = e12-1;
678 
679  std::vector<double>::iterator e22 = std::upper_bound(pVecm[(*t2)].begin(),pVecm[(*t2)].end(), energyTransfer);
680  std::vector<double>::iterator e21 = e22-1;
681 
682  valueT1 =*t1;
683  valueT2 =*t2;
684  valueE21 =*e21;
685  valueE22 =*e22;
686  valueE12 =*e12;
687  valueE11 =*e11;
688 
689  xs11 = pDiffCrossSectionData[LevelIndex][valueT1][valueE11];
690  xs12 = pDiffCrossSectionData[LevelIndex][valueT1][valueE12];
691  xs21 = pDiffCrossSectionData[LevelIndex][valueT2][valueE21];
692  xs22 = pDiffCrossSectionData[LevelIndex][valueT2][valueE22];
693  }
694  }
695 
696  G4double xsProduct = xs11 * xs12 * xs21 * xs22;
697  if (xsProduct != 0.)
698  {
699  sigma = QuadInterpolator( valueE11, valueE12,
700  valueE21, valueE22,
701  xs11, xs12,
702  xs21, xs22,
703  valueT1, valueT2,
704  k, energyTransfer);
705  }
706 
707  }
708 
709  return sigma;
710 }
711 
712 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
713 
714 G4double G4MuElecInelasticModel::LogLogInterpolate(G4double e1,
715  G4double e2,
716  G4double e,
717  G4double xs1,
718  G4double xs2)
719 {
720  G4double a = (std::log10(xs2)-std::log10(xs1)) / (std::log10(e2)-std::log10(e1));
721  G4double b = std::log10(xs2) - a*std::log10(e2);
722  G4double sigma = a*std::log10(e) + b;
723  G4double value = (std::pow(10.,sigma));
724  return value;
725 }
726 
727 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
728 
729 G4double G4MuElecInelasticModel::QuadInterpolator(G4double e11, G4double e12,
730  G4double e21, G4double e22,
731  G4double xs11, G4double xs12,
732  G4double xs21, G4double xs22,
733  G4double t1, G4double t2,
734  G4double t, G4double e)
735 {
736  G4double interpolatedvalue1 = LogLogInterpolate(e11, e12, e, xs11, xs12);
737  G4double interpolatedvalue2 = LogLogInterpolate(e21, e22, e, xs21, xs22);
738  G4double value = LogLogInterpolate(t1, t2, t, interpolatedvalue1, interpolatedvalue2);
739  return value;
740 }
741 
742 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
743 
744 G4int G4MuElecInelasticModel::RandomSelect(G4double k, const G4String& particle )
745 {
746  G4int level = 0;
747 
748  std::map< G4String,G4MuElecCrossSectionDataSet*,std::less<G4String> >::iterator pos;
749  pos = tableData.find(particle);
750 
751  if (pos != tableData.end())
752  {
753  G4MuElecCrossSectionDataSet* table = pos->second;
754 
755  if (table != 0)
756  {
757  G4double* valuesBuffer = new G4double[table->NumberOfComponents()];
758  const size_t n(table->NumberOfComponents());
759  size_t i(n);
760  G4double value = 0.;
761 
762  while (i>0)
763  {
764  i--;
765  valuesBuffer[i] = table->GetComponent(i)->FindValue(k);
766  value += valuesBuffer[i];
767  }
768 
769  value *= G4UniformRand();
770 
771  i = n;
772 
773  while (i > 0)
774  {
775  i--;
776 
777  if (valuesBuffer[i] > value)
778  {
779  delete[] valuesBuffer;
780  return i;
781  }
782  value -= valuesBuffer[i];
783  }
784 
785  if (valuesBuffer) delete[] valuesBuffer;
786 
787  }
788  }
789  else
790  {
791  G4Exception("G4MuElecInelasticModel::RandomSelect","em0002",FatalException,"Model not applicable to particle type.");
792  }
793 
794  return level;
795 }
796 
797 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
798 
799 
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virtual void Initialise(const G4ParticleDefinition *, const G4DataVector &)
Definition: G4MuElecInelasticModel.cc:116
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Definition: G4Electron.cc:89
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Definition: G4VEmModel.hh:640
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Definition: G4NistManager.hh:474
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virtual G4double FindValue(G4double x, G4int componentId=0) const =0
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Definition: G4MuElecCrossSectionDataSet.cc:474
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