source: trunk/source/processes/electromagnetic/lowenergy/src/G4DNADingfelderChargeDecreaseModel.cc@ 1197

Last change on this file since 1197 was 1196, checked in by garnier, 16 years ago

update CVS release candidate geant4.9.3.01
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[1192]26// $Id: G4DNADingfelderChargeDecreaseModel.cc,v 1.6 2009/08/13 11:32:47 sincerti Exp $
[1196]27// GEANT4 tag $Name: geant4-09-03-cand-01 $
[1058]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
[1192]51 if( verboseLevel>0 )
52 {
53 G4cout << "Dingfelder charge decrease model is constructed " << G4endl;
54 }
[1058]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
[1192]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
[1058]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
[1192]229 if (material->GetName() == "G4_WATER")
[1058]230 {
[1192]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;
[1058]237 }
238
239 }
240
[1192]241 } // if(numOfCouples>0)
242
[1058]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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