source: trunk/source/processes/electromagnetic/lowenergy/src/G4DNADingfelderChargeIncreaseModel.cc@ 1314

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update geant4.9.3 tag
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26// $Id: G4DNADingfelderChargeIncreaseModel.cc,v 1.6 2009/08/13 11:32:47 sincerti Exp $
27// GEANT4 tag $Name: geant4-09-03 $
28//
29
30#include "G4DNADingfelderChargeIncreaseModel.hh"
31
32//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
33
34using namespace std;
35
36//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
37
38G4DNADingfelderChargeIncreaseModel::G4DNADingfelderChargeIncreaseModel(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 increase model is constructed " << G4endl;
54 }
55
56}
57
58//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
59
60G4DNADingfelderChargeIncreaseModel::~G4DNADingfelderChargeIncreaseModel()
61{}
62
63//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
64
65void G4DNADingfelderChargeIncreaseModel::Initialise(const G4ParticleDefinition* particle,
66 const G4DataVector& /*cuts*/)
67{
68
69 if (verboseLevel > 3)
70 G4cout << "Calling G4DNADingfelderChargeIncreaseModel::Initialise()" << G4endl;
71
72 // Energy limits
73
74 G4DNAGenericIonsManager *instance;
75 instance = G4DNAGenericIonsManager::Instance();
76 G4ParticleDefinition* hydrogenDef = instance->GetIon("hydrogen");
77 G4ParticleDefinition* alphaPlusDef = instance->GetIon("alpha+");
78 G4ParticleDefinition* heliumDef = instance->GetIon("helium");
79
80 G4String hydrogen;
81 G4String alphaPlus;
82 G4String helium;
83
84 if (hydrogenDef != 0)
85 {
86 hydrogen = hydrogenDef->GetParticleName();
87 lowEnergyLimit[hydrogen] = 1. * keV;
88 highEnergyLimit[hydrogen] = 10. * MeV;
89 }
90 else
91 {
92 G4Exception("G4DNADingfelderChargeIncreaseModel::Initialise: hydrogen is not defined");
93 }
94
95 if (alphaPlusDef != 0)
96 {
97 alphaPlus = alphaPlusDef->GetParticleName();
98 lowEnergyLimit[alphaPlus] = 1. * keV;
99 highEnergyLimit[alphaPlus] = 10. * MeV;
100 }
101 else
102 {
103 G4Exception("G4DNADingfelderChargeIncreaseModel::Initialise: alphaPlus is not defined");
104 }
105
106 if (heliumDef != 0)
107 {
108 helium = heliumDef->GetParticleName();
109 lowEnergyLimit[helium] = 1. * keV;
110 highEnergyLimit[helium] = 10. * MeV;
111 }
112 else
113 {
114 G4Exception("G4DNADingfelderChargeIncreaseModel::Initialise: helium is not defined");
115 }
116
117 if (particle==hydrogenDef)
118 {
119 SetLowEnergyLimit(lowEnergyLimit[hydrogen]);
120 SetHighEnergyLimit(highEnergyLimit[hydrogen]);
121 }
122
123 if (particle==alphaPlusDef)
124 {
125 SetLowEnergyLimit(lowEnergyLimit[alphaPlus]);
126 SetHighEnergyLimit(highEnergyLimit[alphaPlus]);
127 }
128
129 if (particle==heliumDef)
130 {
131 SetLowEnergyLimit(lowEnergyLimit[helium]);
132 SetHighEnergyLimit(highEnergyLimit[helium]);
133 }
134
135 // Final state
136
137 //ALPHA+
138
139 f0[0][0]=1.;
140 a0[0][0]=2.25;
141 a1[0][0]=-0.75;
142 b0[0][0]=-32.10;
143 c0[0][0]=0.600;
144 d0[0][0]=2.40;
145 x0[0][0]=4.60;
146
147 x1[0][0]=-1.;
148 b1[0][0]=-1.;
149
150 numberOfPartialCrossSections[0]=1;
151
152 //HELIUM
153
154 f0[0][1]=1.;
155 a0[0][1]=2.25;
156 a1[0][1]=-0.75;
157 b0[0][1]=-30.93;
158 c0[0][1]=0.590;
159 d0[0][1]=2.35;
160 x0[0][1]=4.29;
161
162 f0[1][1]=1.;
163 a0[1][1]=2.25;
164 a1[1][1]=-0.75;
165 b0[1][1]=-32.61;
166 c0[1][1]=0.435;
167 d0[1][1]=2.70;
168 x0[1][1]=4.45;
169
170 x1[0][1]=-1.;
171 b1[0][1]=-1.;
172
173 x1[1][1]=-1.;
174 b1[1][1]=-1.;
175
176 numberOfPartialCrossSections[1]=2;
177
178 //
179
180 if( verboseLevel>0 )
181 {
182 G4cout << "Dingfelder charge increase model is initialized " << G4endl
183 << "Energy range: "
184 << LowEnergyLimit() / keV << " keV - "
185 << HighEnergyLimit() / MeV << " MeV for "
186 << particle->GetParticleName()
187 << G4endl;
188 }
189
190 if(!isInitialised)
191 {
192 isInitialised = true;
193
194 if(pParticleChange)
195 fParticleChangeForGamma = reinterpret_cast<G4ParticleChangeForGamma*>(pParticleChange);
196 else
197 fParticleChangeForGamma = new G4ParticleChangeForGamma();
198 }
199
200 // InitialiseElementSelectors(particle,cuts);
201
202 // Test if water material
203
204 flagMaterialIsWater= false;
205 densityWater = 0;
206
207 const G4ProductionCutsTable* theCoupleTable = G4ProductionCutsTable::GetProductionCutsTable();
208
209 if(theCoupleTable)
210 {
211 G4int numOfCouples = theCoupleTable->GetTableSize();
212
213 if(numOfCouples>0)
214 {
215 for (G4int i=0; i<numOfCouples; i++)
216 {
217 const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(i);
218 const G4Material* material = couple->GetMaterial();
219
220 if (material->GetName() == "G4_WATER")
221 {
222 G4double density = material->GetAtomicNumDensityVector()[1];
223 flagMaterialIsWater = true;
224 densityWater = density;
225
226 if (verboseLevel > 3)
227 G4cout << "****** Water material is found with density(cm^-3)=" << density/(cm*cm*cm) << G4endl;
228 }
229
230 }
231
232 } // if(numOfCouples>0)
233
234 } // if (theCoupleTable)
235
236}
237
238//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
239
240G4double G4DNADingfelderChargeIncreaseModel::CrossSectionPerVolume(const G4Material*,
241 const G4ParticleDefinition* particleDefinition,
242 G4double k,
243 G4double,
244 G4double)
245{
246 if (verboseLevel > 3)
247 G4cout << "Calling CrossSectionPerVolume() of G4DNADingfelderChargeIncreaseModel" << G4endl;
248
249 // Calculate total cross section for model
250
251 G4DNAGenericIonsManager *instance;
252 instance = G4DNAGenericIonsManager::Instance();
253
254 if (
255 particleDefinition != instance->GetIon("hydrogen")
256 &&
257 particleDefinition != instance->GetIon("alpha+")
258 &&
259 particleDefinition != instance->GetIon("helium")
260 )
261
262 return 0;
263
264 G4double lowLim = 0;
265 G4double highLim = 0;
266 G4double totalCrossSection = 0.;
267
268 if (flagMaterialIsWater)
269 {
270 const G4String& particleName = particleDefinition->GetParticleName();
271
272 std::map< G4String,G4double,std::less<G4String> >::iterator pos1;
273 pos1 = lowEnergyLimit.find(particleName);
274
275 if (pos1 != lowEnergyLimit.end())
276 {
277 lowLim = pos1->second;
278 }
279
280 std::map< G4String,G4double,std::less<G4String> >::iterator pos2;
281 pos2 = highEnergyLimit.find(particleName);
282
283 if (pos2 != highEnergyLimit.end())
284 {
285 highLim = pos2->second;
286 }
287
288 if (k >= lowLim && k < highLim)
289 {
290 //HYDROGEN
291 if (particleDefinition == instance->GetIon("hydrogen"))
292 {
293 const G4double aa = 2.835;
294 const G4double bb = 0.310;
295 const G4double cc = 2.100;
296 const G4double dd = 0.760;
297 const G4double fac = 1.0e-18;
298 const G4double rr = 13.606 * eV;
299
300 G4double t = k / (proton_mass_c2/electron_mass_c2);
301 G4double x = t / rr;
302 G4double temp = 4.0 * pi * Bohr_radius/nm * Bohr_radius/nm * fac;
303 G4double sigmal = temp * cc * (std::pow(x,dd));
304 G4double sigmah = temp * (aa * std::log(1.0 + x) + bb) / x;
305 totalCrossSection = 1.0/(1.0/sigmal + 1.0/sigmah) *m*m;
306 }
307 else
308 {
309 totalCrossSection = Sum(k,particleDefinition);
310 }
311 }
312
313 if (verboseLevel > 3)
314 {
315 G4cout << "---> Kinetic energy(eV)=" << k/eV << G4endl;
316 G4cout << " - Cross section per water molecule (cm^2)=" << totalCrossSection/cm/cm << G4endl;
317 G4cout << " - Cross section per water molecule (cm^-1)=" << totalCrossSection*densityWater/(1./cm) << G4endl;
318 }
319
320 } // if (flagMaterialIsWater)
321
322 return totalCrossSection*densityWater;
323
324}
325
326//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
327
328void G4DNADingfelderChargeIncreaseModel::SampleSecondaries(std::vector<G4DynamicParticle*>* fvect,
329 const G4MaterialCutsCouple* /*couple*/,
330 const G4DynamicParticle* aDynamicParticle,
331 G4double,
332 G4double)
333{
334 if (verboseLevel > 3)
335 G4cout << "Calling SampleSecondaries() of G4DNADingfelderChargeIncreaseModel" << G4endl;
336
337 fParticleChangeForGamma->ProposeTrackStatus(fStopAndKill);
338 fParticleChangeForGamma->ProposeLocalEnergyDeposit(0.);
339
340 G4ParticleDefinition* definition = aDynamicParticle->GetDefinition();
341
342 G4double inK = aDynamicParticle->GetKineticEnergy();
343
344 G4int finalStateIndex = RandomSelect(inK,definition);
345
346 G4int n = NumberOfFinalStates(definition,finalStateIndex);
347
348 G4double outK = inK - IncomingParticleBindingEnergyConstant(definition,finalStateIndex);
349
350 G4DNAGenericIonsManager* instance;
351 instance = G4DNAGenericIonsManager::Instance();
352
353 G4double electronK;
354 if (definition == instance->GetIon("hydrogen")) electronK = inK*electron_mass_c2/proton_mass_c2;
355 else electronK = inK*electron_mass_c2/(3728*MeV);
356
357 if (outK<0)
358 {
359 G4String message;
360 message="G4DNADingfelderChargeIncreaseModel::SampleSecondaries: final kinetic energy is below 0! Process ";
361 }
362
363 G4DynamicParticle* dp = new G4DynamicParticle
364
365 (OutgoingParticleDefinition(definition,finalStateIndex),
366 aDynamicParticle->GetMomentumDirection(),
367 outK) ;
368
369 fvect->push_back(dp);
370
371 n = n - 1;
372
373 while (n>0)
374 {
375 n--;
376 fvect->push_back(new G4DynamicParticle
377 (G4Electron::Electron(), aDynamicParticle->GetMomentumDirection(), electronK) );
378 }
379
380}
381
382//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
383
384G4int G4DNADingfelderChargeIncreaseModel::NumberOfFinalStates(G4ParticleDefinition* particleDefinition,
385 G4int finalStateIndex )
386
387{
388 G4DNAGenericIonsManager* instance;
389 instance = G4DNAGenericIonsManager::Instance();
390 if (particleDefinition == instance->GetIon("hydrogen")) return 2;
391 if (particleDefinition == instance->GetIon("alpha+")) return 2;
392
393 if (particleDefinition == instance->GetIon("helium"))
394 { if (finalStateIndex==0) return 2;
395 return 3;
396 }
397 return 0;
398}
399
400//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
401
402G4ParticleDefinition* G4DNADingfelderChargeIncreaseModel::OutgoingParticleDefinition (G4ParticleDefinition* particleDefinition,
403 G4int finalStateIndex)
404{
405 G4DNAGenericIonsManager * instance(G4DNAGenericIonsManager::Instance());
406 if (particleDefinition == instance->GetIon("hydrogen")) return G4Proton::Proton();
407 if (particleDefinition == instance->GetIon("alpha+")) return instance->GetIon("alpha++");
408
409 if (particleDefinition == instance->GetIon("helium"))
410 {
411 if (finalStateIndex==0) return instance->GetIon("alpha+");
412 return instance->GetIon("alpha++");
413 }
414 return 0;
415}
416
417//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
418
419G4double G4DNADingfelderChargeIncreaseModel::IncomingParticleBindingEnergyConstant(G4ParticleDefinition* particleDefinition,
420 G4int finalStateIndex )
421{
422 G4DNAGenericIonsManager * instance(G4DNAGenericIonsManager::Instance());
423 if(particleDefinition == instance->GetIon("hydrogen")) return 13.6*eV;
424
425 if(particleDefinition == instance->GetIon("alpha+"))
426 {
427 // Binding energy for He+ -> He++ + e- 54.509 eV
428 // Binding energy for He -> He+ + e- 24.587 eV
429 return 54.509*eV;
430 }
431
432 if(particleDefinition == instance->GetIon("helium"))
433 {
434 // Binding energy for He+ -> He++ + e- 54.509 eV
435 // Binding energy for He -> He+ + e- 24.587 eV
436
437 if (finalStateIndex==0) return 24.587*eV;
438 return (54.509 + 24.587)*eV;
439 }
440
441 return 0;
442}
443
444//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
445
446//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
447
448G4double G4DNADingfelderChargeIncreaseModel::PartialCrossSection(G4double k, G4int index,
449 const G4ParticleDefinition* particleDefinition)
450{
451
452 G4int particleTypeIndex = 0;
453 G4DNAGenericIonsManager *instance;
454 instance = G4DNAGenericIonsManager::Instance();
455
456 if (particleDefinition == instance->GetIon("alpha+")) particleTypeIndex=0;
457 if (particleDefinition == instance->GetIon("helium")) particleTypeIndex=1;
458
459 //
460 // sigma(T) = f0 10 ^ y(log10(T/eV))
461 //
462 // / a0 x + b0 x < x0
463 // |
464 // y(x) = < a0 x + b0 - c0 (x - x0)^d0 x0 <= x < x1
465 // |
466 // \ a1 x + b1 x >= x1
467 //
468 //
469 // f0, a0, a1, b0, b1, c0, d0, x0, x1 are parameters that change for protons and helium (0, +, ++)
470 //
471 // 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)
472 //
473 // From Rad. Phys. and Chem. 59 (2000) 255-275, M. Dingfelder et al.
474 // Inelastic-collision cross sections of liquid water for interactions of energetic proton
475 //
476
477 if (x1[index][particleTypeIndex]<x0[index][particleTypeIndex])
478 {
479 //
480 // 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)
481 //
482 // x1 = x0 + ((a0 - a1)/(c0 * d0)) ^ (1 / (d0 - 1))
483 //
484 // b1 = (a0 - a1) * x1 + b0 - c0 * (x1 - x0) ^ d0
485 //
486
487 x1[index][particleTypeIndex]=x0[index][particleTypeIndex] + std::pow((a0[index][particleTypeIndex] - a1[index][particleTypeIndex]) / (c0[index][particleTypeIndex] * d0[index][particleTypeIndex]), 1. / (d0[index][particleTypeIndex] - 1.));
488 b1[index][particleTypeIndex]=(a0[index][particleTypeIndex] - a1[index][particleTypeIndex]) * x1[index][particleTypeIndex] + b0[index][particleTypeIndex] - c0[index][particleTypeIndex] * std::pow(x1[index][particleTypeIndex] - x0[index][particleTypeIndex], d0[index][particleTypeIndex]);
489 }
490
491 G4double x(std::log10(k/eV));
492 G4double y;
493
494 if (x<x0[index][particleTypeIndex])
495 y=a0[index][particleTypeIndex] * x + b0[index][particleTypeIndex];
496 else if (x<x1[index][particleTypeIndex])
497 y=a0[index][particleTypeIndex] * x + b0[index][particleTypeIndex] - c0[index][particleTypeIndex] * std::pow(x - x0[index][particleTypeIndex], d0[index][particleTypeIndex]);
498 else
499 y=a1[index][particleTypeIndex] * x + b1[index][particleTypeIndex];
500
501 return f0[index][particleTypeIndex] * std::pow(10., y)*m*m;
502
503}
504
505//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
506
507G4int G4DNADingfelderChargeIncreaseModel::RandomSelect(G4double k,
508 const G4ParticleDefinition* particleDefinition)
509{
510
511 G4int particleTypeIndex = 0;
512 G4DNAGenericIonsManager *instance;
513 instance = G4DNAGenericIonsManager::Instance();
514
515 if (particleDefinition == instance->GetIon("hydrogen")) return 0;
516 if (particleDefinition == instance->GetIon("alpha+")) particleTypeIndex=0;
517 if (particleDefinition == instance->GetIon("helium")) particleTypeIndex=1;
518
519 const G4int n = numberOfPartialCrossSections[particleTypeIndex];
520 G4double* values(new G4double[n]);
521 G4double value = 0;
522 G4int i = n;
523
524 while (i>0)
525 {
526 i--;
527 values[i]=PartialCrossSection(k, i, particleDefinition);
528 value+=values[i];
529 }
530
531 value*=G4UniformRand();
532
533 i=n;
534 while (i>0)
535 {
536 i--;
537
538 if (values[i]>value)
539 break;
540
541 value-=values[i];
542 }
543
544 delete[] values;
545
546 return i;
547}
548
549//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
550
551G4double G4DNADingfelderChargeIncreaseModel::Sum(G4double k, const G4ParticleDefinition* particleDefinition)
552{
553 G4int particleTypeIndex = 0;
554 G4DNAGenericIonsManager *instance;
555 instance = G4DNAGenericIonsManager::Instance();
556
557 if (particleDefinition == instance->GetIon("alpha+")) particleTypeIndex=0;
558 if (particleDefinition == instance->GetIon("helium")) particleTypeIndex=1;
559
560 G4double totalCrossSection = 0.;
561
562 for (G4int i=0; i<numberOfPartialCrossSections[particleTypeIndex]; i++)
563 {
564 totalCrossSection += PartialCrossSection(k,i,particleDefinition);
565 }
566 return totalCrossSection;
567}
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