source: trunk/source/processes/electromagnetic/lowenergy/src/G4DNADingfelderChargeIncreaseModel.cc@ 1346

Last change on this file since 1346 was 1337, checked in by garnier, 15 years ago

tag geant4.9.4 beta 1 + modifs locales
File size: 16.4 KB
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26// $Id: G4DNADingfelderChargeIncreaseModel.cc,v 1.9 2010/04/06 11:00:35 sincerti Exp $
27// GEANT4 tag $Name: geant4-09-04-beta-01 $
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] = 100. * eV;
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}
203
204//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
205
206G4double G4DNADingfelderChargeIncreaseModel::CrossSectionPerVolume(const G4Material* material,
207 const G4ParticleDefinition* particleDefinition,
208 G4double k,
209 G4double,
210 G4double)
211{
212 if (verboseLevel > 3)
213 G4cout << "Calling CrossSectionPerVolume() of G4DNADingfelderChargeIncreaseModel" << G4endl;
214
215 // Calculate total cross section for model
216
217 G4DNAGenericIonsManager *instance;
218 instance = G4DNAGenericIonsManager::Instance();
219
220 if (
221 particleDefinition != instance->GetIon("hydrogen")
222 &&
223 particleDefinition != instance->GetIon("alpha+")
224 &&
225 particleDefinition != instance->GetIon("helium")
226 )
227
228 return 0;
229
230 G4double lowLim = 0;
231 G4double highLim = 0;
232 G4double totalCrossSection = 0.;
233
234 if (material->GetName() == "G4_WATER")
235 {
236 const G4String& particleName = particleDefinition->GetParticleName();
237
238 std::map< G4String,G4double,std::less<G4String> >::iterator pos1;
239 pos1 = lowEnergyLimit.find(particleName);
240
241 if (pos1 != lowEnergyLimit.end())
242 {
243 lowLim = pos1->second;
244 }
245
246 std::map< G4String,G4double,std::less<G4String> >::iterator pos2;
247 pos2 = highEnergyLimit.find(particleName);
248
249 if (pos2 != highEnergyLimit.end())
250 {
251 highLim = pos2->second;
252 }
253
254 if (k >= lowLim && k < highLim)
255 {
256 //HYDROGEN
257 if (particleDefinition == instance->GetIon("hydrogen"))
258 {
259 const G4double aa = 2.835;
260 const G4double bb = 0.310;
261 const G4double cc = 2.100;
262 const G4double dd = 0.760;
263 const G4double fac = 1.0e-18;
264 const G4double rr = 13.606 * eV;
265
266 G4double t = k / (proton_mass_c2/electron_mass_c2);
267 G4double x = t / rr;
268 G4double temp = 4.0 * pi * Bohr_radius/nm * Bohr_radius/nm * fac;
269 G4double sigmal = temp * cc * (std::pow(x,dd));
270 G4double sigmah = temp * (aa * std::log(1.0 + x) + bb) / x;
271 totalCrossSection = 1.0/(1.0/sigmal + 1.0/sigmah) *m*m;
272 }
273 else
274 {
275 totalCrossSection = Sum(k,particleDefinition);
276 }
277 }
278
279 if (verboseLevel > 3)
280 {
281 G4cout << "---> Kinetic energy(eV)=" << k/eV << G4endl;
282 G4cout << " - Cross section per water molecule (cm^2)=" << totalCrossSection/cm/cm << G4endl;
283 G4cout << " - Cross section per water molecule (cm^-1)=" << totalCrossSection*material->GetAtomicNumDensityVector()[1]/(1./cm) << G4endl;
284 }
285
286 }
287
288 return totalCrossSection*material->GetAtomicNumDensityVector()[1];
289
290}
291
292//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
293
294void G4DNADingfelderChargeIncreaseModel::SampleSecondaries(std::vector<G4DynamicParticle*>* fvect,
295 const G4MaterialCutsCouple* /*couple*/,
296 const G4DynamicParticle* aDynamicParticle,
297 G4double,
298 G4double)
299{
300 if (verboseLevel > 3)
301 G4cout << "Calling SampleSecondaries() of G4DNADingfelderChargeIncreaseModel" << G4endl;
302
303 fParticleChangeForGamma->ProposeTrackStatus(fStopAndKill);
304 fParticleChangeForGamma->ProposeLocalEnergyDeposit(0.);
305
306 G4ParticleDefinition* definition = aDynamicParticle->GetDefinition();
307
308 G4double particleMass = definition->GetPDGMass();
309
310 G4double inK = aDynamicParticle->GetKineticEnergy();
311
312 G4int finalStateIndex = RandomSelect(inK,definition);
313
314 G4int n = NumberOfFinalStates(definition,finalStateIndex);
315
316 G4double outK = inK - IncomingParticleBindingEnergyConstant(definition,finalStateIndex);
317
318 G4DNAGenericIonsManager* instance;
319 instance = G4DNAGenericIonsManager::Instance();
320
321 G4double electronK;
322 if (definition == instance->GetIon("hydrogen")) electronK = inK*electron_mass_c2/proton_mass_c2;
323 else electronK = inK*electron_mass_c2/(particleMass);
324
325 if (outK<0)
326 {
327 G4String message;
328 message="G4DNADingfelderChargeIncreaseModel::SampleSecondaries: final kinetic energy is below 0! Process ";
329 }
330
331 G4DynamicParticle* dp = new G4DynamicParticle
332
333 (OutgoingParticleDefinition(definition,finalStateIndex),
334 aDynamicParticle->GetMomentumDirection(),
335 outK) ;
336
337 fvect->push_back(dp);
338
339 n = n - 1;
340
341 while (n>0)
342 {
343 n--;
344 fvect->push_back(new G4DynamicParticle
345 (G4Electron::Electron(), aDynamicParticle->GetMomentumDirection(), electronK) );
346 }
347
348}
349
350//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
351
352G4int G4DNADingfelderChargeIncreaseModel::NumberOfFinalStates(G4ParticleDefinition* particleDefinition,
353 G4int finalStateIndex )
354
355{
356 G4DNAGenericIonsManager* instance;
357 instance = G4DNAGenericIonsManager::Instance();
358 if (particleDefinition == instance->GetIon("hydrogen")) return 2;
359 if (particleDefinition == instance->GetIon("alpha+")) return 2;
360
361 if (particleDefinition == instance->GetIon("helium"))
362 { if (finalStateIndex==0) return 2;
363 return 3;
364 }
365 return 0;
366}
367
368//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
369
370G4ParticleDefinition* G4DNADingfelderChargeIncreaseModel::OutgoingParticleDefinition (G4ParticleDefinition* particleDefinition,
371 G4int finalStateIndex)
372{
373 G4DNAGenericIonsManager * instance(G4DNAGenericIonsManager::Instance());
374 if (particleDefinition == instance->GetIon("hydrogen")) return G4Proton::Proton();
375 if (particleDefinition == instance->GetIon("alpha+")) return instance->GetIon("alpha++");
376
377 if (particleDefinition == instance->GetIon("helium"))
378 {
379 if (finalStateIndex==0) return instance->GetIon("alpha+");
380 return instance->GetIon("alpha++");
381 }
382 return 0;
383}
384
385//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
386
387G4double G4DNADingfelderChargeIncreaseModel::IncomingParticleBindingEnergyConstant(G4ParticleDefinition* particleDefinition,
388 G4int finalStateIndex )
389{
390 G4DNAGenericIonsManager * instance(G4DNAGenericIonsManager::Instance());
391 if(particleDefinition == instance->GetIon("hydrogen")) return 13.6*eV;
392
393 if(particleDefinition == instance->GetIon("alpha+"))
394 {
395 // Binding energy for He+ -> He++ + e- 54.509 eV
396 // Binding energy for He -> He+ + e- 24.587 eV
397 return 54.509*eV;
398 }
399
400 if(particleDefinition == instance->GetIon("helium"))
401 {
402 // Binding energy for He+ -> He++ + e- 54.509 eV
403 // Binding energy for He -> He+ + e- 24.587 eV
404
405 if (finalStateIndex==0) return 24.587*eV;
406 return (54.509 + 24.587)*eV;
407 }
408
409 return 0;
410}
411
412//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
413
414//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
415
416G4double G4DNADingfelderChargeIncreaseModel::PartialCrossSection(G4double k, G4int index,
417 const G4ParticleDefinition* particleDefinition)
418{
419
420 G4int particleTypeIndex = 0;
421 G4DNAGenericIonsManager *instance;
422 instance = G4DNAGenericIonsManager::Instance();
423
424 if (particleDefinition == instance->GetIon("alpha+")) particleTypeIndex=0;
425 if (particleDefinition == instance->GetIon("helium")) particleTypeIndex=1;
426
427 //
428 // sigma(T) = f0 10 ^ y(log10(T/eV))
429 //
430 // / a0 x + b0 x < x0
431 // |
432 // y(x) = < a0 x + b0 - c0 (x - x0)^d0 x0 <= x < x1
433 // |
434 // \ a1 x + b1 x >= x1
435 //
436 //
437 // f0, a0, a1, b0, b1, c0, d0, x0, x1 are parameters that change for protons and helium (0, +, ++)
438 //
439 // 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)
440 //
441 // From Rad. Phys. and Chem. 59 (2000) 255-275, M. Dingfelder et al.
442 // Inelastic-collision cross sections of liquid water for interactions of energetic proton
443 //
444
445 if (x1[index][particleTypeIndex]<x0[index][particleTypeIndex])
446 {
447 //
448 // 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)
449 //
450 // x1 = x0 + ((a0 - a1)/(c0 * d0)) ^ (1 / (d0 - 1))
451 //
452 // b1 = (a0 - a1) * x1 + b0 - c0 * (x1 - x0) ^ d0
453 //
454
455 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.));
456 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]);
457 }
458
459 G4double x(std::log10(k/eV));
460 G4double y;
461
462 if (x<x0[index][particleTypeIndex])
463 y=a0[index][particleTypeIndex] * x + b0[index][particleTypeIndex];
464 else if (x<x1[index][particleTypeIndex])
465 y=a0[index][particleTypeIndex] * x + b0[index][particleTypeIndex] - c0[index][particleTypeIndex] * std::pow(x - x0[index][particleTypeIndex], d0[index][particleTypeIndex]);
466 else
467 y=a1[index][particleTypeIndex] * x + b1[index][particleTypeIndex];
468
469 return f0[index][particleTypeIndex] * std::pow(10., y)*m*m;
470
471}
472
473//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
474
475G4int G4DNADingfelderChargeIncreaseModel::RandomSelect(G4double k,
476 const G4ParticleDefinition* particleDefinition)
477{
478
479 G4int particleTypeIndex = 0;
480 G4DNAGenericIonsManager *instance;
481 instance = G4DNAGenericIonsManager::Instance();
482
483 if (particleDefinition == instance->GetIon("hydrogen")) return 0;
484 if (particleDefinition == instance->GetIon("alpha+")) particleTypeIndex=0;
485 if (particleDefinition == instance->GetIon("helium")) particleTypeIndex=1;
486
487 const G4int n = numberOfPartialCrossSections[particleTypeIndex];
488 G4double* values(new G4double[n]);
489 G4double value = 0;
490 G4int i = n;
491
492 while (i>0)
493 {
494 i--;
495 values[i]=PartialCrossSection(k, i, particleDefinition);
496 value+=values[i];
497 }
498
499 value*=G4UniformRand();
500
501 i=n;
502 while (i>0)
503 {
504 i--;
505
506 if (values[i]>value)
507 break;
508
509 value-=values[i];
510 }
511
512 delete[] values;
513
514 return i;
515}
516
517//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
518
519G4double G4DNADingfelderChargeIncreaseModel::Sum(G4double k, const G4ParticleDefinition* particleDefinition)
520{
521 G4int particleTypeIndex = 0;
522 G4DNAGenericIonsManager *instance;
523 instance = G4DNAGenericIonsManager::Instance();
524
525 if (particleDefinition == instance->GetIon("alpha+")) particleTypeIndex=0;
526 if (particleDefinition == instance->GetIon("helium")) particleTypeIndex=1;
527
528 G4double totalCrossSection = 0.;
529
530 for (G4int i=0; i<numberOfPartialCrossSections[particleTypeIndex]; i++)
531 {
532 totalCrossSection += PartialCrossSection(k,i,particleDefinition);
533 }
534 return totalCrossSection;
535}
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