source: trunk/source/processes/electromagnetic/lowenergy/src/G4DNADingfelderChargeDecreaseModel.cc @ 1347

Last change on this file since 1347 was 1347, checked in by garnier, 13 years ago

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26// $Id: G4DNADingfelderChargeDecreaseModel.cc,v 1.9 2010/04/06 11:00:35 sincerti Exp $
27// GEANT4 tag $Name: geant4-09-04-ref-00 $
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] = 100. * eV;
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}
212
213//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
214
215G4double G4DNADingfelderChargeDecreaseModel::CrossSectionPerVolume(const G4Material* material,
216                                           const G4ParticleDefinition* particleDefinition,
217                                           G4double k,
218                                           G4double,
219                                           G4double)
220{
221  if (verboseLevel > 3)
222    G4cout << "Calling CrossSectionPerVolume() of G4DNADingfelderChargeDecreaseModel" << G4endl;
223
224 // Calculate total cross section for model
225
226  G4DNAGenericIonsManager *instance;
227  instance = G4DNAGenericIonsManager::Instance();
228
229  if (
230      particleDefinition != G4Proton::ProtonDefinition()
231      &&
232      particleDefinition != instance->GetIon("alpha++")
233      &&
234      particleDefinition != instance->GetIon("alpha+")
235     )
236           
237    return 0;
238
239  G4double lowLim = 0;
240  G4double highLim = 0;
241  G4double crossSection = 0.;
242
243  if (material->GetName() == "G4_WATER")
244  {
245    const G4String& particleName = particleDefinition->GetParticleName();
246
247    std::map< G4String,G4double,std::less<G4String> >::iterator pos1;
248    pos1 = lowEnergyLimit.find(particleName);
249
250    if (pos1 != lowEnergyLimit.end())
251    {
252      lowLim = pos1->second;
253    }
254
255    std::map< G4String,G4double,std::less<G4String> >::iterator pos2;
256    pos2 = highEnergyLimit.find(particleName);
257
258    if (pos2 != highEnergyLimit.end())
259    {
260      highLim = pos2->second;
261    }
262
263    if (k >= lowLim && k < highLim)
264    {
265      crossSection = Sum(k,particleDefinition);
266    }
267 
268    if (verboseLevel > 3)
269    {
270      G4cout << "---> Kinetic energy(eV)=" << k/eV << G4endl;
271      G4cout << " - Cross section per water molecule (cm^2)=" << crossSection/cm/cm << G4endl;
272      G4cout << " - Cross section per water molecule (cm^-1)=" << crossSection*material->GetAtomicNumDensityVector()[1]/(1./cm) << G4endl;
273    } 
274
275  } 
276
277 return crossSection*material->GetAtomicNumDensityVector()[1];             
278
279}
280
281//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
282
283void G4DNADingfelderChargeDecreaseModel::SampleSecondaries(std::vector<G4DynamicParticle*>* fvect,
284                                              const G4MaterialCutsCouple* /*couple*/,
285                                              const G4DynamicParticle* aDynamicParticle,
286                                              G4double,
287                                              G4double)
288{
289  if (verboseLevel > 3)
290    G4cout << "Calling SampleSecondaries() of G4DNADingfelderChargeDecreaseModel" << G4endl;
291
292  G4double inK = aDynamicParticle->GetKineticEnergy();
293 
294  G4ParticleDefinition* definition = aDynamicParticle->GetDefinition();
295 
296  G4double particleMass = definition->GetPDGMass();
297
298  G4int finalStateIndex = RandomSelect(inK,definition);
299 
300  G4int n = NumberOfFinalStates(definition, finalStateIndex);
301  G4double waterBindingEnergy = WaterBindingEnergyConstant(definition, finalStateIndex);
302  G4double outgoingParticleBindingEnergy = OutgoingParticleBindingEnergyConstant(definition, finalStateIndex);
303 
304  G4double outK = 0.;
305  if (definition==G4Proton::Proton())
306    outK = inK - n*(inK*electron_mass_c2/proton_mass_c2) - waterBindingEnergy + outgoingParticleBindingEnergy;
307  else
308    outK = inK - n*(inK*electron_mass_c2/particleMass) - waterBindingEnergy + outgoingParticleBindingEnergy;
309 
310  if (outK<0)
311  {
312    G4String message;
313    message="G4DNADingfelderChargeDecreaseModel::SampleSecondaries: final kinetic energy is below 0! Process ";
314    G4Exception(message);
315  }
316 
317  fParticleChangeForGamma->ProposeTrackStatus(fStopAndKill);
318  fParticleChangeForGamma->ProposeLocalEnergyDeposit(waterBindingEnergy);
319 
320  G4DynamicParticle* dp = new G4DynamicParticle (OutgoingParticleDefinition(definition, finalStateIndex), 
321                                                        aDynamicParticle->GetMomentumDirection(), 
322                                                        outK) ;
323  fvect->push_back(dp);
324
325}
326
327//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
328
329G4int G4DNADingfelderChargeDecreaseModel::NumberOfFinalStates(G4ParticleDefinition* particleDefinition, 
330                                                      G4int finalStateIndex )
331 
332{
333  if (particleDefinition == G4Proton::Proton()) return 1;
334 
335  G4DNAGenericIonsManager*instance;
336  instance = G4DNAGenericIonsManager::Instance();
337 
338  if (particleDefinition == instance->GetIon("alpha++") ) 
339  {
340    if (finalStateIndex==0)  return 1;
341    return 2;   
342  }
343 
344  if (particleDefinition == instance->GetIon("alpha+") ) return 1;
345 
346  return 0;
347}
348
349//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
350
351G4ParticleDefinition* G4DNADingfelderChargeDecreaseModel::OutgoingParticleDefinition (G4ParticleDefinition* particleDefinition, 
352                                                                              G4int finalStateIndex) 
353{
354  G4DNAGenericIonsManager * instance(G4DNAGenericIonsManager::Instance());
355 
356  if (particleDefinition == G4Proton::Proton()) return instance->GetIon("hydrogen"); 
357 
358  if (particleDefinition == instance->GetIon("alpha++") ) 
359  {
360    if (finalStateIndex == 0) return instance->GetIon("alpha+"); 
361    return instance->GetIon("helium");   
362  }
363 
364  if (particleDefinition == instance->GetIon("alpha+") ) return instance->GetIon("helium");   
365 
366  return 0;
367}
368
369//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
370
371G4double G4DNADingfelderChargeDecreaseModel::WaterBindingEnergyConstant(G4ParticleDefinition* particleDefinition, 
372                                                                G4int finalStateIndex )
373{
374  // Ionization energy of first water shell
375  // Rad. Phys. Chem. 59 p.267 by Dingf. et al.
376  // W + 10.79 eV -> W+ + e-
377 
378  G4DNAGenericIonsManager * instance(G4DNAGenericIonsManager::Instance());
379 
380  if(particleDefinition == G4Proton::Proton()) return 10.79*eV;
381
382  if (particleDefinition == instance->GetIon("alpha++") ) 
383  {
384      // Binding energy for    W+ -> W++ + e-    10.79 eV
385      // Binding energy for    W  -> W+  + e-    10.79 eV
386      //
387      // Ionization energy of first water shell
388      // Rad. Phys. Chem. 59 p.267 by Dingf. et al.
389
390      if (finalStateIndex == 0) return 10.79*eV;
391 
392      return 10.79*2*eV;
393  }
394
395  if (particleDefinition == instance->GetIon("alpha+") ) 
396  {
397      // Binding energy for    W+ -> W++ + e-    10.79 eV
398      // Binding energy for    W  -> W+  + e-    10.79 eV
399      //
400      // Ionization energy of first water shell
401      // Rad. Phys. Chem. 59 p.267 by Dingf. et al.
402
403      return 10.79*eV;
404  }
405 
406  return 0;
407}
408
409//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
410
411G4double G4DNADingfelderChargeDecreaseModel::OutgoingParticleBindingEnergyConstant(G4ParticleDefinition* particleDefinition, 
412                                                                           G4int finalStateIndex)
413{
414  G4DNAGenericIonsManager * instance(G4DNAGenericIonsManager::Instance());
415 
416  if(particleDefinition == G4Proton::Proton()) return 13.6*eV;
417
418  if (particleDefinition == instance->GetIon("alpha++") ) 
419  {
420      // Binding energy for    He+ -> He++ + e-    54.509 eV
421      // Binding energy for    He  -> He+  + e-    24.587 eV
422
423      if (finalStateIndex==0)   return 54.509*eV;
424     
425      return (54.509 + 24.587)*eV;
426  }
427 
428  if (particleDefinition == instance->GetIon("alpha+") ) 
429  {
430      // Binding energy for    He+ -> He++ + e-    54.509 eV
431      // Binding energy for    He  -> He+  + e-    24.587 eV
432     
433      return 24.587*eV;
434  } 
435 
436  return 0;
437}
438
439//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
440
441G4double G4DNADingfelderChargeDecreaseModel::PartialCrossSection(G4double k, G4int index, 
442                                                           const G4ParticleDefinition* particleDefinition)
443{
444  G4int particleTypeIndex = 0;
445  G4DNAGenericIonsManager* instance;
446  instance = G4DNAGenericIonsManager::Instance();
447
448  if (particleDefinition == G4Proton::ProtonDefinition()) particleTypeIndex=0;
449  if (particleDefinition == instance->GetIon("alpha++")) particleTypeIndex=1;
450  if (particleDefinition == instance->GetIon("alpha+")) particleTypeIndex=2;
451
452  //
453  // sigma(T) = f0 10 ^ y(log10(T/eV))
454  //
455  //         /  a0 x + b0                    x < x0
456  //         |
457  // y(x) = <   a0 x + b0 - c0 (x - x0)^d0   x0 <= x < x1
458  //         |
459  //         \  a1 x + b1                    x >= x1
460  //
461  //
462  // f0, a0, a1, b0, b1, c0, d0, x0, x1 are parameters that change for protons and helium (0, +, ++)
463  //
464  // 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)
465  //
466  // From Rad. Phys. and Chem. 59 (2000) 255-275, M. Dingfelder et al.
467  // Inelastic-collision cross sections of liquid water for interactions of energetic proton
468  //
469 
470  if (x1[index][particleTypeIndex]<x0[index][particleTypeIndex])
471  {
472      //
473      // 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)
474      //
475      // x1 = x0 + ((a0 - a1)/(c0 * d0)) ^ (1 / (d0 - 1))
476      //
477      // b1 = (a0 - a1) * x1 + b0 - c0 * (x1 - x0) ^ d0
478      //
479 
480      x1[index][particleTypeIndex]=x0[index][particleTypeIndex] + std::pow((a0[index][particleTypeIndex] - a1[index][particleTypeIndex]) 
481                                                                           / (c0[index][particleTypeIndex] * d0[index][particleTypeIndex]), 1. / (d0[index][particleTypeIndex] - 1.));
482      b1[index][particleTypeIndex]=(a0[index][particleTypeIndex] - a1[index][particleTypeIndex]) * x1[index][particleTypeIndex] 
483        + b0[index][particleTypeIndex] - c0[index][particleTypeIndex] * std::pow(x1[index][particleTypeIndex] 
484                                                                                 - x0[index][particleTypeIndex], d0[index][particleTypeIndex]);
485  }
486
487  G4double x(std::log10(k/eV));
488  G4double y;
489 
490  if (x<x0[index][particleTypeIndex])
491    y=a0[index][particleTypeIndex] * x + b0[index][particleTypeIndex];
492  else if (x<x1[index][particleTypeIndex])
493    y=a0[index][particleTypeIndex] * x + b0[index][particleTypeIndex] - c0[index][particleTypeIndex] 
494      * std::pow(x - x0[index][particleTypeIndex], d0[index][particleTypeIndex]);
495  else
496    y=a1[index][particleTypeIndex] * x + b1[index][particleTypeIndex];
497
498  return f0[index][particleTypeIndex] * std::pow(10., y)*m*m;
499 
500}
501
502G4int G4DNADingfelderChargeDecreaseModel::RandomSelect(G4double k, 
503                                                        const G4ParticleDefinition* particleDefinition)
504{
505  G4int particleTypeIndex = 0;
506  G4DNAGenericIonsManager *instance;
507  instance = G4DNAGenericIonsManager::Instance();
508
509  if (particleDefinition == G4Proton::ProtonDefinition()) particleTypeIndex = 0;
510  if (particleDefinition == instance->GetIon("alpha++")) particleTypeIndex = 1;
511  if (particleDefinition == instance->GetIon("alpha+")) particleTypeIndex = 2;
512
513  const G4int n = numberOfPartialCrossSections[particleTypeIndex];
514  G4double* values(new G4double[n]);
515  G4double value(0);
516  G4int i = n;
517 
518  while (i>0)
519  {
520      i--;
521      values[i]=PartialCrossSection(k, i, particleDefinition);
522      value+=values[i];
523  }
524 
525  value*=G4UniformRand();
526 
527  i=n;
528  while (i>0)
529  {
530      i--;
531   
532      if (values[i]>value)
533        break;
534 
535      value-=values[i];
536  }
537 
538  delete[] values;
539 
540  return i;
541}
542
543//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
544
545G4double G4DNADingfelderChargeDecreaseModel::Sum(G4double k, const G4ParticleDefinition* particleDefinition)
546{
547  G4int particleTypeIndex = 0;
548  G4DNAGenericIonsManager* instance;
549  instance = G4DNAGenericIonsManager::Instance();
550
551  if (particleDefinition == G4Proton::ProtonDefinition()) particleTypeIndex=0;
552  if (particleDefinition == instance->GetIon("alpha++")) particleTypeIndex=1;
553  if (particleDefinition == instance->GetIon("alpha+")) particleTypeIndex=2;
554
555  G4double totalCrossSection = 0.;
556
557  for (G4int i=0; i<numberOfPartialCrossSections[particleTypeIndex]; i++)
558  {
559    totalCrossSection += PartialCrossSection(k,i,particleDefinition);
560  }
561  return totalCrossSection;
562}
563
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