source: trunk/source/processes/electromagnetic/lowenergy/src/G4DNADingfelderChargeDecreaseModel.cc @ 1250

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26// $Id: G4DNADingfelderChargeDecreaseModel.cc,v 1.6 2009/08/13 11:32:47 sincerti Exp $
27// GEANT4 tag $Name: geant4-09-03 $
28//
29
30#include "G4DNADingfelderChargeDecreaseModel.hh"
31
32//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
33
34using namespace std;
35
36//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
37
38G4DNADingfelderChargeDecreaseModel::G4DNADingfelderChargeDecreaseModel(const G4ParticleDefinition*,
39                                             const G4String& nam)
40:G4VEmModel(nam),isInitialised(false)
41{
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 << "Dingfelder charge decrease model is constructed " << G4endl;
54  }
55}
56
57//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
58
59G4DNADingfelderChargeDecreaseModel::~G4DNADingfelderChargeDecreaseModel()
60{}
61
62//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
63
64void G4DNADingfelderChargeDecreaseModel::Initialise(const G4ParticleDefinition* particle,
65                                       const G4DataVector& /*cuts*/)
66{
67
68  if (verboseLevel > 3)
69    G4cout << "Calling G4DNADingfelderChargeDecreaseModel::Initialise()" << G4endl;
70
71  // Energy limits
72 
73  G4DNAGenericIonsManager *instance;
74  instance = G4DNAGenericIonsManager::Instance();
75  G4ParticleDefinition* protonDef = G4Proton::ProtonDefinition();
76  G4ParticleDefinition* alphaPlusPlusDef = instance->GetIon("alpha++");
77  G4ParticleDefinition* alphaPlusDef = instance->GetIon("alpha+");
78
79  G4String proton;
80  G4String alphaPlusPlus;
81  G4String alphaPlus;
82
83  if (protonDef != 0)
84  {
85    proton = protonDef->GetParticleName();
86    lowEnergyLimit[proton] = 1. * keV;
87    highEnergyLimit[proton] = 10. * MeV;
88  }
89  else
90  {
91    G4Exception("G4DNADingfelderChargeDecreaseModel::Initialise: proton is not defined");
92  }
93
94  if (alphaPlusPlusDef != 0)
95  {
96    alphaPlusPlus = alphaPlusPlusDef->GetParticleName();
97    lowEnergyLimit[alphaPlusPlus] = 1. * keV;
98    highEnergyLimit[alphaPlusPlus] = 10. * MeV;
99  }
100  else
101  {
102    G4Exception("G4DNADingfelderChargeDecreaseModel::Initialise: alphaPlusPlus is not defined");
103  }
104
105  if (alphaPlusDef != 0)
106  {
107    alphaPlus = alphaPlusDef->GetParticleName();
108    lowEnergyLimit[alphaPlus] = 1. * keV;
109    highEnergyLimit[alphaPlus] = 10. * MeV;
110  }
111  else
112  {
113    G4Exception("G4DNADingfelderChargeDecreaseModel::Initialise: alphaPlus is not defined");
114  }
115
116  if (particle==protonDef) 
117  {
118    SetLowEnergyLimit(lowEnergyLimit[proton]);
119    SetHighEnergyLimit(highEnergyLimit[proton]);
120  }
121
122  if (particle==alphaPlusPlusDef) 
123  {
124    SetLowEnergyLimit(lowEnergyLimit[alphaPlusPlus]);
125    SetHighEnergyLimit(highEnergyLimit[alphaPlusPlus]);
126  }
127
128  if (particle==alphaPlusDef) 
129  {
130    SetLowEnergyLimit(lowEnergyLimit[alphaPlus]);
131    SetHighEnergyLimit(highEnergyLimit[alphaPlus]);
132  }
133
134  // Final state
135 
136    //PROTON
137  f0[0][0]=1.;
138  a0[0][0]=-0.180;
139  a1[0][0]=-3.600;
140  b0[0][0]=-18.22;
141  b1[0][0]=-1.997;
142  c0[0][0]=0.215;
143  d0[0][0]=3.550;
144  x0[0][0]=3.450;
145  x1[0][0]=5.251;
146
147  numberOfPartialCrossSections[0] = 1;
148
149  //ALPHA++
150  f0[0][1]=1.;  a0[0][1]=0.95;
151  a1[0][1]=-2.75;
152  b0[0][1]=-23.00;
153  c0[0][1]=0.215;
154  d0[0][1]=2.95;
155  x0[0][1]=3.50;
156
157  f0[1][1]=1.;
158  a0[1][1]=0.95;
159  a1[1][1]=-2.75;
160  b0[1][1]=-23.73;
161  c0[1][1]=0.250;
162  d0[1][1]=3.55;
163  x0[1][1]=3.72;
164
165  x1[0][1]=-1.;
166  b1[0][1]=-1.;
167
168  x1[1][1]=-1.;
169  b1[1][1]=-1.; 
170 
171  numberOfPartialCrossSections[1] = 2;
172
173  // ALPHA+
174  f0[0][2]=1.;
175  a0[0][2]=0.65;
176  a1[0][2]=-2.75;
177  b0[0][2]=-21.81;
178  c0[0][2]=0.232;
179  d0[0][2]=2.95;
180  x0[0][2]=3.53;
181
182  x1[0][2]=-1.;
183  b1[0][2]=-1.;
184 
185  numberOfPartialCrossSections[2] = 1;
186
187  //
188 
189  if( verboseLevel>0 ) 
190  { 
191    G4cout << "Dingfelder charge decrease model is initialized " << G4endl
192           << "Energy range: "
193           << LowEnergyLimit() / keV << " keV - "
194           << HighEnergyLimit() / MeV << " MeV for "
195           << particle->GetParticleName()
196           << G4endl;
197  }
198 
199  if(!isInitialised) 
200  {
201    isInitialised = true;
202 
203    if(pParticleChange)
204      fParticleChangeForGamma = reinterpret_cast<G4ParticleChangeForGamma*>(pParticleChange);
205    else
206      fParticleChangeForGamma = new G4ParticleChangeForGamma();
207  }   
208
209  // InitialiseElementSelectors(particle,cuts);
210 
211  // Test if water material
212
213  flagMaterialIsWater= false;
214  densityWater = 0;
215
216  const G4ProductionCutsTable* theCoupleTable = G4ProductionCutsTable::GetProductionCutsTable();
217
218  if(theCoupleTable) 
219  {
220    G4int numOfCouples = theCoupleTable->GetTableSize();
221 
222    if(numOfCouples>0) 
223    {
224          for (G4int i=0; i<numOfCouples; i++) 
225          {
226            const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(i);
227            const G4Material* material = couple->GetMaterial();
228
229            if (material->GetName() == "G4_WATER") 
230            {
231              G4double density = material->GetAtomicNumDensityVector()[1];
232              flagMaterialIsWater = true; 
233              densityWater = density; 
234             
235              if (verboseLevel > 3) 
236              G4cout << "****** Water material is found with density(cm^-3)=" << density/(cm*cm*cm) << G4endl;
237            }
238 
239          }
240
241    } // if(numOfCouples>0)
242
243  } // if (theCoupleTable)
244
245}
246
247//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
248
249G4double G4DNADingfelderChargeDecreaseModel::CrossSectionPerVolume(const G4Material*,
250                                           const G4ParticleDefinition* particleDefinition,
251                                           G4double k,
252                                           G4double,
253                                           G4double)
254{
255  if (verboseLevel > 3)
256    G4cout << "Calling CrossSectionPerVolume() of G4DNADingfelderChargeDecreaseModel" << G4endl;
257
258 // Calculate total cross section for model
259
260  G4DNAGenericIonsManager *instance;
261  instance = G4DNAGenericIonsManager::Instance();
262
263  if (
264      particleDefinition != G4Proton::ProtonDefinition()
265      &&
266      particleDefinition != instance->GetIon("alpha++")
267      &&
268      particleDefinition != instance->GetIon("alpha+")
269     )
270           
271    return 0;
272
273  G4double lowLim = 0;
274  G4double highLim = 0;
275  G4double crossSection = 0.;
276
277  if (flagMaterialIsWater)
278  {
279    const G4String& particleName = particleDefinition->GetParticleName();
280
281    std::map< G4String,G4double,std::less<G4String> >::iterator pos1;
282    pos1 = lowEnergyLimit.find(particleName);
283
284    if (pos1 != lowEnergyLimit.end())
285    {
286      lowLim = pos1->second;
287    }
288
289    std::map< G4String,G4double,std::less<G4String> >::iterator pos2;
290    pos2 = highEnergyLimit.find(particleName);
291
292    if (pos2 != highEnergyLimit.end())
293    {
294      highLim = pos2->second;
295    }
296
297    if (k >= lowLim && k < highLim)
298    {
299      crossSection = Sum(k,particleDefinition);
300    }
301 
302    if (verboseLevel > 3)
303    {
304      G4cout << "---> Kinetic energy(eV)=" << k/eV << G4endl;
305      G4cout << " - Cross section per water molecule (cm^2)=" << crossSection/cm/cm << G4endl;
306      G4cout << " - Cross section per water molecule (cm^-1)=" << crossSection*densityWater/(1./cm) << G4endl;
307    } 
308
309  } // if (flagMaterialIsWater)
310
311 return crossSection*densityWater;                 
312
313}
314
315//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
316
317void G4DNADingfelderChargeDecreaseModel::SampleSecondaries(std::vector<G4DynamicParticle*>* fvect,
318                                              const G4MaterialCutsCouple* /*couple*/,
319                                              const G4DynamicParticle* aDynamicParticle,
320                                              G4double,
321                                              G4double)
322{
323  if (verboseLevel > 3)
324    G4cout << "Calling SampleSecondaries() of G4DNADingfelderChargeDecreaseModel" << G4endl;
325
326  G4double inK = aDynamicParticle->GetKineticEnergy();
327 
328  G4ParticleDefinition* definition = aDynamicParticle->GetDefinition();
329
330  G4int finalStateIndex = RandomSelect(inK,definition);
331 
332  G4int n = NumberOfFinalStates(definition, finalStateIndex);
333  G4double waterBindingEnergy = WaterBindingEnergyConstant(definition, finalStateIndex);
334  G4double outgoingParticleBindingEnergy = OutgoingParticleBindingEnergyConstant(definition, finalStateIndex);
335 
336  G4double outK = 0.;
337  if (definition==G4Proton::Proton())
338    outK = inK - n*(inK*electron_mass_c2/proton_mass_c2) - waterBindingEnergy + outgoingParticleBindingEnergy;
339  else
340    outK = inK - n*(inK*electron_mass_c2/(3728*MeV)) - waterBindingEnergy + outgoingParticleBindingEnergy;
341 
342  if (outK<0)
343  {
344    G4String message;
345    message="G4DNADingfelderChargeDecreaseModel::SampleSecondaries: final kinetic energy is below 0! Process ";
346    G4Exception(message);
347  }
348 
349  fParticleChangeForGamma->ProposeTrackStatus(fStopAndKill);
350  fParticleChangeForGamma->ProposeLocalEnergyDeposit(waterBindingEnergy);
351 
352  G4DynamicParticle* dp = new G4DynamicParticle (OutgoingParticleDefinition(definition, finalStateIndex), 
353                                                        aDynamicParticle->GetMomentumDirection(), 
354                                                        outK) ;
355  fvect->push_back(dp);
356
357}
358
359//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
360
361G4int G4DNADingfelderChargeDecreaseModel::NumberOfFinalStates(G4ParticleDefinition* particleDefinition, 
362                                                      G4int finalStateIndex )
363 
364{
365  if (particleDefinition == G4Proton::Proton()) return 1;
366 
367  G4DNAGenericIonsManager*instance;
368  instance = G4DNAGenericIonsManager::Instance();
369 
370  if (particleDefinition == instance->GetIon("alpha++") ) 
371  {
372    if (finalStateIndex==0)  return 1;
373    return 2;   
374  }
375 
376  if (particleDefinition == instance->GetIon("alpha+") ) return 1;
377 
378  return 0;
379}
380
381//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
382
383G4ParticleDefinition* G4DNADingfelderChargeDecreaseModel::OutgoingParticleDefinition (G4ParticleDefinition* particleDefinition, 
384                                                                              G4int finalStateIndex) 
385{
386  G4DNAGenericIonsManager * instance(G4DNAGenericIonsManager::Instance());
387 
388  if (particleDefinition == G4Proton::Proton()) return instance->GetIon("hydrogen"); 
389 
390  if (particleDefinition == instance->GetIon("alpha++") ) 
391  {
392    if (finalStateIndex == 0) return instance->GetIon("alpha+"); 
393    return instance->GetIon("helium");   
394  }
395 
396  if (particleDefinition == instance->GetIon("alpha+") ) return instance->GetIon("helium");   
397 
398  return 0;
399}
400
401//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
402
403G4double G4DNADingfelderChargeDecreaseModel::WaterBindingEnergyConstant(G4ParticleDefinition* particleDefinition, 
404                                                                G4int finalStateIndex )
405{
406  // Ionization energy of first water shell
407  // Rad. Phys. Chem. 59 p.267 by Dingf. et al.
408  // W + 10.79 eV -> W+ + e-
409 
410  G4DNAGenericIonsManager * instance(G4DNAGenericIonsManager::Instance());
411 
412  if(particleDefinition == G4Proton::Proton()) return 10.79*eV;
413
414  if (particleDefinition == instance->GetIon("alpha++") ) 
415  {
416      // Binding energy for    W+ -> W++ + e-    10.79 eV
417      // Binding energy for    W  -> W+  + e-    10.79 eV
418      //
419      // Ionization energy of first water shell
420      // Rad. Phys. Chem. 59 p.267 by Dingf. et al.
421
422      if (finalStateIndex == 0) return 10.79*eV;
423 
424      return 10.79*2*eV;
425  }
426
427  if (particleDefinition == instance->GetIon("alpha+") ) 
428  {
429      // Binding energy for    W+ -> W++ + e-    10.79 eV
430      // Binding energy for    W  -> W+  + e-    10.79 eV
431      //
432      // Ionization energy of first water shell
433      // Rad. Phys. Chem. 59 p.267 by Dingf. et al.
434
435      return 10.79*eV;
436  }
437 
438  return 0;
439}
440
441//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
442
443G4double G4DNADingfelderChargeDecreaseModel::OutgoingParticleBindingEnergyConstant(G4ParticleDefinition* particleDefinition, 
444                                                                           G4int finalStateIndex)
445{
446  G4DNAGenericIonsManager * instance(G4DNAGenericIonsManager::Instance());
447 
448  if(particleDefinition == G4Proton::Proton()) return 13.6*eV;
449
450  if (particleDefinition == instance->GetIon("alpha++") ) 
451  {
452      // Binding energy for    He+ -> He++ + e-    54.509 eV
453      // Binding energy for    He  -> He+  + e-    24.587 eV
454
455      if (finalStateIndex==0)   return 54.509*eV;
456     
457      return (54.509 + 24.587)*eV;
458  }
459 
460  if (particleDefinition == instance->GetIon("alpha+") ) 
461  {
462      // Binding energy for    He+ -> He++ + e-    54.509 eV
463      // Binding energy for    He  -> He+  + e-    24.587 eV
464     
465      return 24.587*eV;
466  } 
467 
468  return 0;
469}
470
471//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
472
473G4double G4DNADingfelderChargeDecreaseModel::PartialCrossSection(G4double k, G4int index, 
474                                                           const G4ParticleDefinition* particleDefinition)
475{
476  G4int particleTypeIndex = 0;
477  G4DNAGenericIonsManager* instance;
478  instance = G4DNAGenericIonsManager::Instance();
479
480  if (particleDefinition == G4Proton::ProtonDefinition()) particleTypeIndex=0;
481  if (particleDefinition == instance->GetIon("alpha++")) particleTypeIndex=1;
482  if (particleDefinition == instance->GetIon("alpha+")) particleTypeIndex=2;
483
484  //
485  // sigma(T) = f0 10 ^ y(log10(T/eV))
486  //
487  //         /  a0 x + b0                    x < x0
488  //         |
489  // y(x) = <   a0 x + b0 - c0 (x - x0)^d0   x0 <= x < x1
490  //         |
491  //         \  a1 x + b1                    x >= x1
492  //
493  //
494  // f0, a0, a1, b0, b1, c0, d0, x0, x1 are parameters that change for protons and helium (0, +, ++)
495  //
496  // f0 has been added to the code in order to manage partial (shell-dependent) cross sections (if no shell dependence is present. f0=1. Sum of f0 over the considered shells should give 1)
497  //
498  // From Rad. Phys. and Chem. 59 (2000) 255-275, M. Dingfelder et al.
499  // Inelastic-collision cross sections of liquid water for interactions of energetic proton
500  //
501 
502  if (x1[index][particleTypeIndex]<x0[index][particleTypeIndex])
503  {
504      //
505      // if x1 < x0 means that x1 and b1 will be calculated with the following formula (this piece of code is run on all alphas and not on protons)
506      //
507      // x1 = x0 + ((a0 - a1)/(c0 * d0)) ^ (1 / (d0 - 1))
508      //
509      // b1 = (a0 - a1) * x1 + b0 - c0 * (x1 - x0) ^ d0
510      //
511 
512      x1[index][particleTypeIndex]=x0[index][particleTypeIndex] + std::pow((a0[index][particleTypeIndex] - a1[index][particleTypeIndex]) 
513                                                                           / (c0[index][particleTypeIndex] * d0[index][particleTypeIndex]), 1. / (d0[index][particleTypeIndex] - 1.));
514      b1[index][particleTypeIndex]=(a0[index][particleTypeIndex] - a1[index][particleTypeIndex]) * x1[index][particleTypeIndex] 
515        + b0[index][particleTypeIndex] - c0[index][particleTypeIndex] * std::pow(x1[index][particleTypeIndex] 
516                                                                                 - x0[index][particleTypeIndex], d0[index][particleTypeIndex]);
517  }
518
519  G4double x(std::log10(k/eV));
520  G4double y;
521 
522  if (x<x0[index][particleTypeIndex])
523    y=a0[index][particleTypeIndex] * x + b0[index][particleTypeIndex];
524  else if (x<x1[index][particleTypeIndex])
525    y=a0[index][particleTypeIndex] * x + b0[index][particleTypeIndex] - c0[index][particleTypeIndex] 
526      * std::pow(x - x0[index][particleTypeIndex], d0[index][particleTypeIndex]);
527  else
528    y=a1[index][particleTypeIndex] * x + b1[index][particleTypeIndex];
529
530  return f0[index][particleTypeIndex] * std::pow(10., y)*m*m;
531 
532}
533
534G4int G4DNADingfelderChargeDecreaseModel::RandomSelect(G4double k, 
535                                                        const G4ParticleDefinition* particleDefinition)
536{
537  G4int particleTypeIndex = 0;
538  G4DNAGenericIonsManager *instance;
539  instance = G4DNAGenericIonsManager::Instance();
540
541  if (particleDefinition == G4Proton::ProtonDefinition()) particleTypeIndex = 0;
542  if (particleDefinition == instance->GetIon("alpha++")) particleTypeIndex = 1;
543  if (particleDefinition == instance->GetIon("alpha+")) particleTypeIndex = 2;
544
545  const G4int n = numberOfPartialCrossSections[particleTypeIndex];
546  G4double* values(new G4double[n]);
547  G4double value(0);
548  G4int i = n;
549 
550  while (i>0)
551  {
552      i--;
553      values[i]=PartialCrossSection(k, i, particleDefinition);
554      value+=values[i];
555  }
556 
557  value*=G4UniformRand();
558 
559  i=n;
560  while (i>0)
561  {
562      i--;
563   
564      if (values[i]>value)
565        break;
566 
567      value-=values[i];
568  }
569 
570  delete[] values;
571 
572  return i;
573}
574
575//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
576
577G4double G4DNADingfelderChargeDecreaseModel::Sum(G4double k, const G4ParticleDefinition* particleDefinition)
578{
579  G4int particleTypeIndex = 0;
580  G4DNAGenericIonsManager* instance;
581  instance = G4DNAGenericIonsManager::Instance();
582
583  if (particleDefinition == G4Proton::ProtonDefinition()) particleTypeIndex=0;
584  if (particleDefinition == instance->GetIon("alpha++")) particleTypeIndex=1;
585  if (particleDefinition == instance->GetIon("alpha+")) particleTypeIndex=2;
586
587  G4double totalCrossSection = 0.;
588
589  for (G4int i=0; i<numberOfPartialCrossSections[particleTypeIndex]; i++)
590  {
591    totalCrossSection += PartialCrossSection(k,i,particleDefinition);
592  }
593  return totalCrossSection;
594}
595
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