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G4DNAMillerGreenExcitationModel.cc
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26 // $Id: G4DNAMillerGreenExcitationModel.cc 70171 2013-05-24 13:34:18Z gcosmo $
27 // GEANT4 tag $Name: $
28 //
29 
30 #include "G4DNAMillerGreenExcitationModel.hh"
31 #include "G4SystemOfUnits.hh"
32 #include "G4DNAChemistryManager.hh"
33 #include "G4DNAMolecularMaterial.hh"
34 
35 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
36 
37 using namespace std;
38 
39 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
40 
41 G4DNAMillerGreenExcitationModel::G4DNAMillerGreenExcitationModel(const G4ParticleDefinition*,
42  const G4String& nam)
43  :G4VEmModel(nam),isInitialised(false)
44 {
45  // nistwater = G4NistManager::Instance()->FindOrBuildMaterial("G4_WATER");
46  fpMolWaterDensity = 0;
47 
48  nLevels=0;
49  kineticEnergyCorrection[0]=0.;
50  kineticEnergyCorrection[1]=0.;
51  kineticEnergyCorrection[2]=0.;
52  kineticEnergyCorrection[3]=0.;
53 
54  verboseLevel= 0;
55  // Verbosity scale:
56  // 0 = nothing
57  // 1 = warning for energy non-conservation
58  // 2 = details of energy budget
59  // 3 = calculation of cross sections, file openings, sampling of atoms
60  // 4 = entering in methods
61 
62  if( verboseLevel>0 )
63  {
64  G4cout << "Miller & Green excitation model is constructed " << G4endl;
65  }
66  fParticleChangeForGamma = 0;
67 }
68 
69 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
70 
71 G4DNAMillerGreenExcitationModel::~G4DNAMillerGreenExcitationModel()
72 {}
73 
74 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
75 
76 void G4DNAMillerGreenExcitationModel::Initialise(const G4ParticleDefinition* particle,
77  const G4DataVector& /*cuts*/)
78 {
79 
80  if (verboseLevel > 3)
81  G4cout << "Calling G4DNAMillerGreenExcitationModel::Initialise()" << G4endl;
82 
83  // Energy limits
84 
85  G4DNAGenericIonsManager *instance;
86  instance = G4DNAGenericIonsManager::Instance();
87  G4ParticleDefinition* protonDef = G4Proton::ProtonDefinition();
88  G4ParticleDefinition* hydrogenDef = instance->GetIon("hydrogen");
89  G4ParticleDefinition* alphaPlusPlusDef = instance->GetIon("alpha++");
90  G4ParticleDefinition* alphaPlusDef = instance->GetIon("alpha+");
91  G4ParticleDefinition* heliumDef = instance->GetIon("helium");
92 
93  G4String proton;
94  G4String hydrogen;
95  G4String alphaPlusPlus;
96  G4String alphaPlus;
97  G4String helium;
98 
99  // LIMITS AND CONSTANTS
100 
101  proton = protonDef->GetParticleName();
102  lowEnergyLimit[proton] = 10. * eV;
103  highEnergyLimit[proton] = 500. * keV;
104 
105  kineticEnergyCorrection[0] = 1.;
106  slaterEffectiveCharge[0][0] = 0.;
107  slaterEffectiveCharge[1][0] = 0.;
108  slaterEffectiveCharge[2][0] = 0.;
109  sCoefficient[0][0] = 0.;
110  sCoefficient[1][0] = 0.;
111  sCoefficient[2][0] = 0.;
112 
113  hydrogen = hydrogenDef->GetParticleName();
114  lowEnergyLimit[hydrogen] = 10. * eV;
115  highEnergyLimit[hydrogen] = 500. * keV;
116 
117  kineticEnergyCorrection[0] = 1.;
118  slaterEffectiveCharge[0][0] = 0.;
119  slaterEffectiveCharge[1][0] = 0.;
120  slaterEffectiveCharge[2][0] = 0.;
121  sCoefficient[0][0] = 0.;
122  sCoefficient[1][0] = 0.;
123  sCoefficient[2][0] = 0.;
124 
125  alphaPlusPlus = alphaPlusPlusDef->GetParticleName();
126  lowEnergyLimit[alphaPlusPlus] = 1. * keV;
127  highEnergyLimit[alphaPlusPlus] = 400. * MeV;
128 
129  kineticEnergyCorrection[1] = 0.9382723/3.727417;
130  slaterEffectiveCharge[0][1]=0.;
131  slaterEffectiveCharge[1][1]=0.;
132  slaterEffectiveCharge[2][1]=0.;
133  sCoefficient[0][1]=0.;
134  sCoefficient[1][1]=0.;
135  sCoefficient[2][1]=0.;
136 
137  alphaPlus = alphaPlusDef->GetParticleName();
138  lowEnergyLimit[alphaPlus] = 1. * keV;
139  highEnergyLimit[alphaPlus] = 400. * MeV;
140 
141  kineticEnergyCorrection[2] = 0.9382723/3.727417;
142  slaterEffectiveCharge[0][2]=2.0;
143 
144  // Following values provided by M. Dingfelder
145  slaterEffectiveCharge[1][2]=2.00;
146  slaterEffectiveCharge[2][2]=2.00;
147  //
148  sCoefficient[0][2]=0.7;
149  sCoefficient[1][2]=0.15;
150  sCoefficient[2][2]=0.15;
151 
152  helium = heliumDef->GetParticleName();
153  lowEnergyLimit[helium] = 1. * keV;
154  highEnergyLimit[helium] = 400. * MeV;
155 
156  kineticEnergyCorrection[3] = 0.9382723/3.727417;
157  slaterEffectiveCharge[0][3]=1.7;
158  slaterEffectiveCharge[1][3]=1.15;
159  slaterEffectiveCharge[2][3]=1.15;
160  sCoefficient[0][3]=0.5;
161  sCoefficient[1][3]=0.25;
162  sCoefficient[2][3]=0.25;
163 
164  //
165 
166  if (particle==protonDef)
167  {
168  SetLowEnergyLimit(lowEnergyLimit[proton]);
169  SetHighEnergyLimit(highEnergyLimit[proton]);
170  }
171 
172  if (particle==hydrogenDef)
173  {
174  SetLowEnergyLimit(lowEnergyLimit[hydrogen]);
175  SetHighEnergyLimit(highEnergyLimit[hydrogen]);
176  }
177 
178  if (particle==alphaPlusPlusDef)
179  {
180  SetLowEnergyLimit(lowEnergyLimit[alphaPlusPlus]);
181  SetHighEnergyLimit(highEnergyLimit[alphaPlusPlus]);
182  }
183 
184  if (particle==alphaPlusDef)
185  {
186  SetLowEnergyLimit(lowEnergyLimit[alphaPlus]);
187  SetHighEnergyLimit(highEnergyLimit[alphaPlus]);
188  }
189 
190  if (particle==heliumDef)
191  {
192  SetLowEnergyLimit(lowEnergyLimit[helium]);
193  SetHighEnergyLimit(highEnergyLimit[helium]);
194  }
195 
196  //
197 
198  nLevels = waterExcitation.NumberOfLevels();
199 
200  //
201  if( verboseLevel>0 )
202  {
203  G4cout << "Miller & Green excitation model is initialized " << G4endl
204  << "Energy range: "
205  << LowEnergyLimit() / eV << " eV - "
206  << HighEnergyLimit() / keV << " keV for "
207  << particle->GetParticleName()
208  << G4endl;
209  }
210 
211  // Initialize water density pointer
212  fpMolWaterDensity = G4DNAMolecularMaterial::Instance()->GetNumMolPerVolTableFor(G4Material::GetMaterial("G4_WATER"));
213 
214  if (isInitialised) { return; }
215  fParticleChangeForGamma = GetParticleChangeForGamma();
216  isInitialised = true;
217 
218 }
219 
220 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
221 
222 G4double G4DNAMillerGreenExcitationModel::CrossSectionPerVolume(const G4Material* material,
223  const G4ParticleDefinition* particleDefinition,
224  G4double k,
225  G4double,
226  G4double)
227 {
228  if (verboseLevel > 3)
229  G4cout << "Calling CrossSectionPerVolume() of G4DNAMillerGreenExcitationModel" << G4endl;
230 
231  // Calculate total cross section for model
232 
233  G4DNAGenericIonsManager *instance;
234  instance = G4DNAGenericIonsManager::Instance();
235 
236  if (
237  particleDefinition != G4Proton::ProtonDefinition()
238  &&
239  particleDefinition != instance->GetIon("hydrogen")
240  &&
241  particleDefinition != instance->GetIon("alpha++")
242  &&
243  particleDefinition != instance->GetIon("alpha+")
244  &&
245  particleDefinition != instance->GetIon("helium")
246  )
247 
248  return 0;
249 
250  G4double lowLim = 0;
251  G4double highLim = 0;
252  G4double crossSection = 0.;
253 
254  G4double waterDensity = (*fpMolWaterDensity)[material->GetIndex()];
255 
256  if(waterDensity!= 0.0)
257  // if (material == nistwater || material->GetBaseMaterial() == nistwater)
258  {
259 // G4cout << "WATER DENSITY = " << waterDensity*G4Material::GetMaterial("G4_WATER")->GetMassOfMolecule()/(g/cm3)
260 // << G4endl;
261  const G4String& particleName = particleDefinition->GetParticleName();
262 
263  std::map< G4String,G4double,std::less<G4String> >::iterator pos1;
264  pos1 = lowEnergyLimit.find(particleName);
265 
266  if (pos1 != lowEnergyLimit.end())
267  {
268  lowLim = pos1->second;
269  }
270 
271  std::map< G4String,G4double,std::less<G4String> >::iterator pos2;
272  pos2 = highEnergyLimit.find(particleName);
273 
274  if (pos2 != highEnergyLimit.end())
275  {
276  highLim = pos2->second;
277  }
278 
279  if (k >= lowLim && k < highLim)
280  {
281  crossSection = Sum(k,particleDefinition);
282 
283  // add ONE or TWO electron-water excitation for alpha+ and helium
284  /*
285  if ( particleDefinition == instance->GetIon("alpha+")
286  ||
287  particleDefinition == instance->GetIon("helium")
288  )
289  {
290 
291  G4DNAEmfietzoglouExcitationModel * excitationXS = new G4DNAEmfietzoglouExcitationModel();
292  excitationXS->Initialise(G4Electron::ElectronDefinition());
293 
294  G4double sigmaExcitation=0;
295  G4double tmp =0.;
296 
297  if (k*0.511/3728 > 8.23*eV && k*0.511/3728 < 10*MeV ) sigmaExcitation =
298  excitationXS->CrossSectionPerVolume(material,G4Electron::ElectronDefinition(),k*0.511/3728,tmp,tmp)
299  /material->GetAtomicNumDensityVector()[1];
300 
301  if ( particleDefinition == instance->GetIon("alpha+") )
302  crossSection = crossSection + sigmaExcitation ;
303 
304  if ( particleDefinition == instance->GetIon("helium") )
305  crossSection = crossSection + 2*sigmaExcitation ;
306 
307  delete excitationXS;
308 
309  // Alternative excitation model
310 
311  G4DNABornExcitationModel * excitationXS = new G4DNABornExcitationModel();
312  excitationXS->Initialise(G4Electron::ElectronDefinition());
313 
314  G4double sigmaExcitation=0;
315  G4double tmp=0;
316 
317  if (k*0.511/3728 > 9*eV && k*0.511/3728 < 1*MeV ) sigmaExcitation =
318  excitationXS->CrossSectionPerVolume(material,G4Electron::ElectronDefinition(),k*0.511/3728,tmp,tmp)
319  /material->GetAtomicNumDensityVector()[1];
320 
321  if ( particleDefinition == instance->GetIon("alpha+") )
322  crossSection = crossSection + sigmaExcitation ;
323 
324  if ( particleDefinition == instance->GetIon("helium") )
325  crossSection = crossSection + 2*sigmaExcitation ;
326 
327  delete excitationXS;
328 
329  }
330 */
331 
332  }
333 
334  if (verboseLevel > 2)
335  {
336  G4cout << "__________________________________" << G4endl;
337  G4cout << "°°° G4DNAMillerGreenExcitationModel - XS INFO START" << G4endl;
338  G4cout << "°°° Kinetic energy(eV)=" << k/eV << " particle : " << particleDefinition->GetParticleName() << G4endl;
339  G4cout << "°°° Cross section per water molecule (cm^2)=" << crossSection/cm/cm << G4endl;
340  G4cout << "°°° Cross section per water molecule (cm^-1)=" << crossSection*waterDensity/(1./cm) << G4endl;
341  // G4cout << " - Cross section per water molecule (cm^-1)=" << sigma*material->GetAtomicNumDensityVector()[1]/(1./cm) << G4endl;
342  G4cout << "°°° G4DNAMillerGreenExcitationModel - XS INFO END" << G4endl;
343  }
344  }
345  else
346  {
347  if (verboseLevel > 2)
348  {
349  G4cout << "MillerGreenExcitationModel : WARNING Water density is NULL" << G4endl;
350  }
351  }
352 
353  return crossSection*waterDensity;
354  // return crossSection*material->GetAtomicNumDensityVector()[1];
355 
356 }
357 
358 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
359 
360 void G4DNAMillerGreenExcitationModel::SampleSecondaries(std::vector<G4DynamicParticle*>* /*fvect*/,
361  const G4MaterialCutsCouple* /*couple*/,
362  const G4DynamicParticle* aDynamicParticle,
363  G4double,
364  G4double)
365 {
366 
367  if (verboseLevel > 3)
368  G4cout << "Calling SampleSecondaries() of G4DNAMillerGreenExcitationModel" << G4endl;
369 
370  G4double particleEnergy0 = aDynamicParticle->GetKineticEnergy();
371 
372  G4int level = RandomSelect(particleEnergy0,aDynamicParticle->GetDefinition());
373 
374  // G4double excitationEnergy = waterExcitation.ExcitationEnergy(level);
375 
376  // Dingfelder's excitation levels
377  const G4double excitation[]={ 8.17*eV, 10.13*eV, 11.31*eV, 12.91*eV, 14.50*eV};
378  G4double excitationEnergy = excitation[level];
379 
380  G4double newEnergy = particleEnergy0 - excitationEnergy;
381 
382  if (newEnergy>0)
383  {
384  fParticleChangeForGamma->ProposeMomentumDirection(aDynamicParticle->GetMomentumDirection());
385  fParticleChangeForGamma->SetProposedKineticEnergy(newEnergy);
386  fParticleChangeForGamma->ProposeLocalEnergyDeposit(excitationEnergy);
387 
388  const G4Track * theIncomingTrack = fParticleChangeForGamma->GetCurrentTrack();
389  G4DNAChemistryManager::Instance()->CreateWaterMolecule(eExcitedMolecule,
390  level,
391  theIncomingTrack);
392 
393  }
394 
395 }
396 
397 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
398 
399 G4double G4DNAMillerGreenExcitationModel::PartialCrossSection(G4double k, G4int excitationLevel,
400  const G4ParticleDefinition* particleDefinition)
401 {
402  // ( ( z * aj ) ^ omegaj ) * ( t - ej ) ^ nu
403  // sigma(t) = zEff^2 * sigma0 * --------------------------------------------
404  // jj ^ ( omegaj + nu ) + t ^ ( omegaj + nu )
405  //
406  // where t is the kinetic energy corrected by Helium mass over proton mass for Helium ions
407  //
408  // zEff is:
409  // 1 for protons
410  // 2 for alpha++
411  // and 2 - c1 S_1s - c2 S_2s - c3 S_2p for alpha+ and He
412  //
413  // Dingfelder et al., RPC 59, 255-275, 2000 from Miller and Green (1973)
414  // Formula (34) and Table 2
415 
416  const G4double sigma0(1.E+8 * barn);
417  const G4double nu(1.);
418  const G4double aj[]={876.*eV, 2084.* eV, 1373.*eV, 692.*eV, 900.*eV};
419  const G4double jj[]={19820.*eV, 23490.*eV, 27770.*eV, 30830.*eV, 33080.*eV};
420  const G4double omegaj[]={0.85, 0.88, 0.88, 0.78, 0.78};
421 
422  // Dingfelder's excitation levels
423  const G4double Eliq[5]={ 8.17*eV, 10.13*eV, 11.31*eV, 12.91*eV, 14.50*eV};
424 
425  G4int particleTypeIndex = 0;
426  G4DNAGenericIonsManager* instance;
427  instance = G4DNAGenericIonsManager::Instance();
428 
429  if (particleDefinition == G4Proton::ProtonDefinition()) particleTypeIndex=0;
430  if (particleDefinition == instance->GetIon("hydrogen")) particleTypeIndex=0;
431  if (particleDefinition == instance->GetIon("alpha++")) particleTypeIndex=1;
432  if (particleDefinition == instance->GetIon("alpha+")) particleTypeIndex=2;
433  if (particleDefinition == instance->GetIon("helium")) particleTypeIndex=3;
434 
435  G4double tCorrected;
436  tCorrected = k * kineticEnergyCorrection[particleTypeIndex];
437 
438  // SI - added protection
439  if (tCorrected < Eliq[excitationLevel]) return 0;
440  //
441 
442  G4int z = 10;
443 
444  G4double numerator;
445  numerator = std::pow(z * aj[excitationLevel], omegaj[excitationLevel]) *
446  std::pow(tCorrected - Eliq[excitationLevel], nu);
447 
448  // H case : see S. Uehara et al. IJRB 77, 2, 139-154 (2001) - section 3.3
449 
450  if (particleDefinition == instance->GetIon("hydrogen"))
451  numerator = std::pow(z * 0.75*aj[excitationLevel], omegaj[excitationLevel]) *
452  std::pow(tCorrected - Eliq[excitationLevel], nu);
453 
454 
455  G4double power;
456  power = omegaj[excitationLevel] + nu;
457 
458  G4double denominator;
459  denominator = std::pow(jj[excitationLevel], power) + std::pow(tCorrected, power);
460 
461  G4double zEff = particleDefinition->GetPDGCharge() / eplus + particleDefinition->GetLeptonNumber();
462 
463  zEff -= ( sCoefficient[0][particleTypeIndex] * S_1s(k, Eliq[excitationLevel], slaterEffectiveCharge[0][particleTypeIndex], 1.) +
464  sCoefficient[1][particleTypeIndex] * S_2s(k, Eliq[excitationLevel], slaterEffectiveCharge[1][particleTypeIndex], 2.) +
465  sCoefficient[2][particleTypeIndex] * S_2p(k, Eliq[excitationLevel], slaterEffectiveCharge[2][particleTypeIndex], 2.) );
466 
467  if (particleDefinition == instance->GetIon("hydrogen")) zEff = 1.;
468 
469  G4double cross = sigma0 * zEff * zEff * numerator / denominator;
470 
471 
472  return cross;
473 }
474 
475 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
476 
477 G4int G4DNAMillerGreenExcitationModel::RandomSelect(G4double k,const G4ParticleDefinition* particle)
478 {
479  G4int i = nLevels;
480  G4double value = 0.;
481  std::deque<double> values;
482 
483  G4DNAGenericIonsManager *instance;
484  instance = G4DNAGenericIonsManager::Instance();
485 
486  if ( particle == instance->GetIon("alpha++") ||
487  particle == G4Proton::ProtonDefinition()||
488  particle == instance->GetIon("hydrogen") ||
489  particle == instance->GetIon("alpha+") ||
490  particle == instance->GetIon("helium")
491  )
492  {
493  while (i > 0)
494  {
495  i--;
496  G4double partial = PartialCrossSection(k,i,particle);
497  values.push_front(partial);
498  value += partial;
499  }
500 
501  value *= G4UniformRand();
502 
503  i = nLevels;
504 
505  while (i > 0)
506  {
507  i--;
508  if (values[i] > value) return i;
509  value -= values[i];
510  }
511  }
512 
513  /*
514  // add ONE or TWO electron-water excitation for alpha+ and helium
515 
516  if ( particle == instance->GetIon("alpha+")
517  ||
518  particle == instance->GetIon("helium")
519  )
520  {
521  while (i>0)
522  {
523  i--;
524 
525  G4DNAEmfietzoglouExcitationModel * excitationXS = new G4DNAEmfietzoglouExcitationModel();
526  excitationXS->Initialise(G4Electron::ElectronDefinition());
527 
528  G4double sigmaExcitation=0;
529 
530  if (k*0.511/3728 > 8.23*eV && k*0.511/3728 < 10*MeV ) sigmaExcitation = excitationXS->PartialCrossSection(k*0.511/3728,i);
531 
532  G4double partial = PartialCrossSection(k,i,particle);
533 
534  if (particle == instance->GetIon("alpha+")) partial = PartialCrossSection(k,i,particle) + sigmaExcitation;
535  if (particle == instance->GetIon("helium")) partial = PartialCrossSection(k,i,particle) + 2*sigmaExcitation;
536 
537  values.push_front(partial);
538  value += partial;
539  delete excitationXS;
540  }
541 
542  value*=G4UniformRand();
543 
544  i=5;
545  while (i>0)
546  {
547  i--;
548 
549  if (values[i]>value) return i;
550 
551  value-=values[i];
552  }
553  }
554 */
555 
556  return 0;
557 }
558 
559 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
560 
561 G4double G4DNAMillerGreenExcitationModel::Sum(G4double k, const G4ParticleDefinition* particle)
562 {
563  G4double totalCrossSection = 0.;
564 
565  for (G4int i=0; i<nLevels; i++)
566  {
567  totalCrossSection += PartialCrossSection(k,i,particle);
568  }
569  return totalCrossSection;
570 }
571 
572 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
573 
574 G4double G4DNAMillerGreenExcitationModel::S_1s(G4double t,
575  G4double energyTransferred,
576  G4double _slaterEffectiveCharge,
577  G4double shellNumber)
578 {
579  // 1 - e^(-2r) * ( 1 + 2 r + 2 r^2)
580  // Dingfelder, in Chattanooga 2005 proceedings, formula (7)
581 
582  G4double r = R(t, energyTransferred, _slaterEffectiveCharge, shellNumber);
583  G4double value = 1. - std::exp(-2 * r) * ( ( 2. * r + 2. ) * r + 1. );
584 
585  return value;
586 }
587 
588 
589 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
590 
591 G4double G4DNAMillerGreenExcitationModel::S_2s(G4double t,
592  G4double energyTransferred,
593  G4double _slaterEffectiveCharge,
594  G4double shellNumber)
595 {
596  // 1 - e^(-2 r) * ( 1 + 2 r + 2 r^2 + 2 r^4)
597  // Dingfelder, in Chattanooga 2005 proceedings, formula (8)
598 
599  G4double r = R(t, energyTransferred, _slaterEffectiveCharge, shellNumber);
600  G4double value = 1. - std::exp(-2 * r) * (((2. * r * r + 2.) * r + 2.) * r + 1.);
601 
602  return value;
603 
604 }
605 
606 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
607 
608 G4double G4DNAMillerGreenExcitationModel::S_2p(G4double t,
609  G4double energyTransferred,
610  G4double _slaterEffectiveCharge,
611  G4double shellNumber)
612 {
613  // 1 - e^(-2 r) * ( 1 + 2 r + 2 r^2 + 4/3 r^3 + 2/3 r^4)
614  // Dingfelder, in Chattanooga 2005 proceedings, formula (9)
615 
616  G4double r = R(t, energyTransferred, _slaterEffectiveCharge, shellNumber);
617  G4double value = 1. - std::exp(-2 * r) * (((( 2./3. * r + 4./3.) * r + 2.) * r + 2.) * r + 1.);
618 
619  return value;
620 }
621 
622 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
623 
624 G4double G4DNAMillerGreenExcitationModel::R(G4double t,
625  G4double energyTransferred,
626  G4double _slaterEffectiveCharge,
627  G4double shellNumber)
628 {
629  // tElectron = m_electron / m_alpha * t
630  // Dingfelder, in Chattanooga 2005 proceedings, p 4
631 
632  G4double tElectron = 0.511/3728. * t;
633 
634  // The following is provided by M. Dingfelder
635  G4double H = 2.*13.60569172 * eV;
636  G4double value = std::sqrt ( 2. * tElectron / H ) / ( energyTransferred / H ) * (_slaterEffectiveCharge/shellNumber);
637 
638  return value;
639 }
640 
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Definition: G4VEmModel.hh:599
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Definition: G4ParticleDefinition.hh:159
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Definition: G4DNAMillerGreenExcitationModel.hh:69
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Definition: G4DNAChemistryManager.cc:160
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Definition: G4DNAChemistryManager.hh:55
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Definition: G4VEmModel.hh:690
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