Geant4 10.7.0
Toolkit for the simulation of the passage of particles through matter
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G4DNADingfelderChargeIncreaseModel.cc
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27
28#include "G4DNADingfelderChargeIncreaseModel.hh"
29#include "G4PhysicalConstants.hh"
30#include "G4SystemOfUnits.hh"
31#include "G4DNAMolecularMaterial.hh"
32
33//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
34
35using namespace std;
36
37//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
38
39G4DNADingfelderChargeIncreaseModel::G4DNADingfelderChargeIncreaseModel(const G4ParticleDefinition*,
40 const G4String& nam) :
41G4VEmModel(nam), isInitialised(false)
42{
43 fpMolWaterDensity = 0;
44
45 numberOfPartialCrossSections[0] = 0;
46 numberOfPartialCrossSections[1] = 0;
47
48 verboseLevel = 0;
49 // Verbosity scale:
50 // 0 = nothing
51 // 1 = warning for energy non-conservation
52 // 2 = details of energy budget
53 // 3 = calculation of cross sections, file openings, sampling of atoms
54 // 4 = entering in methods
55
56 if (verboseLevel > 0)
57 {
58 G4cout << "Dingfelder charge increase model is constructed " << G4endl;
59 }
60 fParticleChangeForGamma = 0;
61
62 // Selection of stationary mode
63
64 statCode = false;
65}
66
67//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
68
69G4DNADingfelderChargeIncreaseModel::~G4DNADingfelderChargeIncreaseModel()
70{}
71
72//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
73
74void G4DNADingfelderChargeIncreaseModel::Initialise(const G4ParticleDefinition* particle,
75 const G4DataVector& /*cuts*/)
76{
77
78 if (verboseLevel > 3)
79 {
80 G4cout << "Calling G4DNADingfelderChargeIncreaseModel::Initialise()"
81 << G4endl;
82 }
83
84 // Energy limits
85
86 G4DNAGenericIonsManager *instance;
87 instance = G4DNAGenericIonsManager::Instance();
88 G4ParticleDefinition* hydrogenDef = instance->GetIon("hydrogen");
89 G4ParticleDefinition* alphaPlusDef = instance->GetIon("alpha+");
90 G4ParticleDefinition* heliumDef = instance->GetIon("helium");
91
92 G4String hydrogen;
93 G4String alphaPlus;
94 G4String helium;
95
96 // Limits
97
98 hydrogen = hydrogenDef->GetParticleName();
99 lowEnergyLimit[hydrogen] = 100. * eV;
100 highEnergyLimit[hydrogen] = 100. * MeV;
101
102 alphaPlus = alphaPlusDef->GetParticleName();
103 lowEnergyLimit[alphaPlus] = 1. * keV;
104 highEnergyLimit[alphaPlus] = 400. * MeV;
105
106 helium = heliumDef->GetParticleName();
107 lowEnergyLimit[helium] = 1. * keV;
108 highEnergyLimit[helium] = 400. * MeV;
109
110 //
111
112 if (particle==hydrogenDef)
113 {
114 SetLowEnergyLimit(lowEnergyLimit[hydrogen]);
115 SetHighEnergyLimit(highEnergyLimit[hydrogen]);
116 }
117
118 if (particle==alphaPlusDef)
119 {
120 SetLowEnergyLimit(lowEnergyLimit[alphaPlus]);
121 SetHighEnergyLimit(highEnergyLimit[alphaPlus]);
122 }
123
124 if (particle==heliumDef)
125 {
126 SetLowEnergyLimit(lowEnergyLimit[helium]);
127 SetHighEnergyLimit(highEnergyLimit[helium]);
128 }
129
130 // Final state
131
132 //ALPHA+
133
134 f0[0][0]=1.;
135 a0[0][0]=2.25;
136 a1[0][0]=-0.75;
137 b0[0][0]=-32.10;
138 c0[0][0]=0.600;
139 d0[0][0]=2.40;
140 x0[0][0]=4.60;
141
142 x1[0][0]=-1.;
143 b1[0][0]=-1.;
144
145 numberOfPartialCrossSections[0]=1;
146
147 //HELIUM
148
149 f0[0][1]=1.;
150 a0[0][1]=2.25;
151 a1[0][1]=-0.75;
152 b0[0][1]=-30.93;
153 c0[0][1]=0.590;
154 d0[0][1]=2.35;
155 x0[0][1]=4.29;
156
157 f0[1][1]=1.;
158 a0[1][1]=2.25;
159 a1[1][1]=-0.75;
160 b0[1][1]=-32.61;
161 c0[1][1]=0.435;
162 d0[1][1]=2.70;
163 x0[1][1]=4.45;
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 //
174
175 if( verboseLevel>0 )
176 {
177 G4cout << "Dingfelder charge increase model is initialized " << G4endl
178 << "Energy range: "
179 << LowEnergyLimit() / keV << " keV - "
180 << HighEnergyLimit() / MeV << " MeV for "
181 << particle->GetParticleName()
182 << G4endl;
183 }
184
185 // Initialize water density pointer
186 fpMolWaterDensity = G4DNAMolecularMaterial::Instance()->GetNumMolPerVolTableFor(G4Material::GetMaterial("G4_WATER"));
187
188 if (isInitialised) return;
189
190 fParticleChangeForGamma = GetParticleChangeForGamma();
191 isInitialised = true;
192}
193
194//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
195
196G4double G4DNADingfelderChargeIncreaseModel::CrossSectionPerVolume(const G4Material* material,
197 const G4ParticleDefinition* particleDefinition,
198 G4double k,
199 G4double,
200 G4double)
201{
202 if (verboseLevel > 3)
203 {
204 G4cout
205 << "Calling CrossSectionPerVolume() of G4DNADingfelderChargeIncreaseModel"
206 << G4endl;
207 }
208
209 // Calculate total cross section for model
210
211 G4DNAGenericIonsManager *instance;
212 instance = G4DNAGenericIonsManager::Instance();
213
214 if (
215 particleDefinition != instance->GetIon("hydrogen")
216 &&
217 particleDefinition != instance->GetIon("alpha+")
218 &&
219 particleDefinition != instance->GetIon("helium")
220 )
221
222 return 0;
223
224 G4double lowLim = 0;
225 G4double highLim = 0;
226 G4double totalCrossSection = 0.;
227
228 G4double waterDensity = (*fpMolWaterDensity)[material->GetIndex()];
229
230 const G4String& particleName = particleDefinition->GetParticleName();
231
232 std::map< G4String,G4double,std::less<G4String> >::iterator pos1;
233 pos1 = lowEnergyLimit.find(particleName);
234
235 if (pos1 != lowEnergyLimit.end())
236 {
237 lowLim = pos1->second;
238 }
239
240 std::map< G4String,G4double,std::less<G4String> >::iterator pos2;
241 pos2 = highEnergyLimit.find(particleName);
242
243 if (pos2 != highEnergyLimit.end())
244 {
245 highLim = pos2->second;
246 }
247
248 if (k >= lowLim && k <= highLim)
249 {
250 //HYDROGEN
251 if (particleDefinition == instance->GetIon("hydrogen"))
252 {
253 const G4double aa = 2.835;
254 const G4double bb = 0.310;
255 const G4double cc = 2.100;
256 const G4double dd = 0.760;
257 const G4double fac = 1.0e-18;
258 const G4double rr = 13.606 * eV;
259
260 G4double t = k / (proton_mass_c2/electron_mass_c2);
261 G4double x = t / rr;
262 G4double temp = 4.0 * pi * Bohr_radius/nm * Bohr_radius/nm * fac;
263 G4double sigmal = temp * cc * (std::pow(x,dd));
264 G4double sigmah = temp * (aa * std::log(1.0 + x) + bb) / x;
265 totalCrossSection = 1.0/(1.0/sigmal + 1.0/sigmah) *m*m;
266 }
267 else
268 {
269 totalCrossSection = Sum(k,particleDefinition);
270 }
271 }
272
273 if (verboseLevel > 2)
274 {
275 G4cout << "__________________________________" << G4endl;
276 G4cout << "G4DNADingfelderChargeIncreaseModel - XS INFO START" << G4endl;
277 G4cout << "Kinetic energy(eV)=" << k/eV << " particle : " << particleName << G4endl;
278 G4cout << "Cross section per water molecule (cm^2)=" << totalCrossSection/cm/cm << G4endl;
279 G4cout << "Cross section per water molecule (cm^-1)=" << totalCrossSection*waterDensity/(1./cm) << G4endl;
280 // G4cout << " - Cross section per water molecule (cm^-1)="
281 // << sigma*material->GetAtomicNumDensityVector()[1]/(1./cm) << G4endl;
282 G4cout << "G4DNADingfelderChargeIncreaseModel - XS INFO END" << G4endl;
283 }
284
285 return totalCrossSection*waterDensity;
286 // return totalCrossSection*material->GetAtomicNumDensityVector()[1];
287
288}
289
290//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
291
292void G4DNADingfelderChargeIncreaseModel::SampleSecondaries(std::vector<
293 G4DynamicParticle*>* fvect,
294 const G4MaterialCutsCouple* /*couple*/,
295 const G4DynamicParticle* aDynamicParticle,
296 G4double,
297 G4double)
298{
299 if (verboseLevel > 3)
300 {
301 G4cout
302 << "Calling SampleSecondaries() of G4DNADingfelderChargeIncreaseModel"
303 << G4endl;
304 }
305
306 if (!statCode) fParticleChangeForGamma->ProposeLocalEnergyDeposit(0.);
307
308 G4ParticleDefinition* definition = aDynamicParticle->GetDefinition();
309
310 G4double particleMass = definition->GetPDGMass();
311
312 G4double inK = aDynamicParticle->GetKineticEnergy();
313
314 G4int finalStateIndex = RandomSelect(inK,definition);
315
316 G4int n = NumberOfFinalStates(definition,finalStateIndex);
317
318 G4double outK = 0.;
319
320 if (!statCode) outK = inK - IncomingParticleBindingEnergyConstant(definition,finalStateIndex);
321
322 else outK = inK;
323
324 if (statCode)
325 fParticleChangeForGamma->
326 ProposeLocalEnergyDeposit(IncomingParticleBindingEnergyConstant(definition,finalStateIndex));
327
328 fParticleChangeForGamma->ProposeTrackStatus(fStopAndKill);
329
330 G4DNAGenericIonsManager* instance;
331 instance = G4DNAGenericIonsManager::Instance();
332
333 G4double electronK;
334 if (definition == instance->GetIon("hydrogen")) electronK = inK*electron_mass_c2/proton_mass_c2;
335 else electronK = inK*electron_mass_c2/(particleMass);
336
337 if (outK<0)
338 {
339 G4Exception("G4DNADingfelderChargeIncreaseModel::SampleSecondaries","em0004",
340 FatalException,"Final kinetic energy is negative.");
341 }
342
343 G4DynamicParticle* dp = new G4DynamicParticle(OutgoingParticleDefinition(definition,finalStateIndex),
344 aDynamicParticle->GetMomentumDirection(),
345 outK);
346
347 fvect->push_back(dp);
348
349 n = n - 1;
350
351 while (n>0)
352 {
353 n--;
354 fvect->push_back(new G4DynamicParticle
355 (G4Electron::Electron(), aDynamicParticle->GetMomentumDirection(), electronK) );
356 }
357}
358
359//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
360
361G4int G4DNADingfelderChargeIncreaseModel::NumberOfFinalStates(G4ParticleDefinition* particleDefinition,
362 G4int finalStateIndex)
363
364{
365 G4DNAGenericIonsManager* instance;
366 instance = G4DNAGenericIonsManager::Instance();
367
368 if (particleDefinition == instance->GetIon("hydrogen"))
369 return 2;
370
371 if (particleDefinition == instance->GetIon("alpha+"))
372 return 2;
373
374 if (particleDefinition == instance->GetIon("helium"))
375 {
376 if (finalStateIndex == 0)
377 return 2;
378 return 3;
379 }
380
381 return 0;
382}
383
384//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
385
386G4ParticleDefinition* G4DNADingfelderChargeIncreaseModel::OutgoingParticleDefinition(G4ParticleDefinition* particleDefinition,
387 G4int finalStateIndex)
388{
389 G4DNAGenericIonsManager * instance(G4DNAGenericIonsManager::Instance());
390
391 if (particleDefinition == instance->GetIon("hydrogen"))
392 return G4Proton::Proton();
393
394 if (particleDefinition == instance->GetIon("alpha+"))
395 return instance->GetIon("alpha++");
396
397 if (particleDefinition == instance->GetIon("helium"))
398 {
399 if (finalStateIndex == 0)
400 return instance->GetIon("alpha+");
401 return instance->GetIon("alpha++");
402 }
403
404 return 0;
405}
406
407//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
408
409G4double G4DNADingfelderChargeIncreaseModel::IncomingParticleBindingEnergyConstant(G4ParticleDefinition* particleDefinition,
410 G4int finalStateIndex)
411{
412 G4DNAGenericIonsManager * instance(G4DNAGenericIonsManager::Instance());
413
414 if (particleDefinition == instance->GetIon("hydrogen"))
415 return 13.6 * eV;
416
417 if (particleDefinition == instance->GetIon("alpha+"))
418 {
419 // Binding energy for He+ -> He++ + e- 54.509 eV
420 // Binding energy for He -> He+ + e- 24.587 eV
421 return 54.509 * eV;
422 }
423
424 if (particleDefinition == instance->GetIon("helium"))
425 {
426 // Binding energy for He+ -> He++ + e- 54.509 eV
427 // Binding energy for He -> He+ + e- 24.587 eV
428
429 if (finalStateIndex == 0)
430 return 24.587 * eV;
431 return (54.509 + 24.587) * eV;
432 }
433
434 return 0;
435}
436
437//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
438
439G4double G4DNADingfelderChargeIncreaseModel::PartialCrossSection(G4double k,
440 G4int index,
441 const G4ParticleDefinition* particleDefinition)
442{
443 G4int particleTypeIndex = 0;
444 G4DNAGenericIonsManager *instance;
445 instance = G4DNAGenericIonsManager::Instance();
446
447 if (particleDefinition == instance->GetIon("alpha+"))
448 particleTypeIndex = 0;
449
450 if (particleDefinition == instance->GetIon("helium"))
451 particleTypeIndex = 1;
452
453 //
454 // sigma(T) = f0 10 ^ y(log10(T/eV))
455 //
456 // / a0 x + b0 x < x0
457 // |
458 // y(x) = < a0 x + b0 - c0 (x - x0)^d0 x0 <= x < x1
459 // |
460 // \ a1 x + b1 x >= x1
461 //
462 //
463 // f0, a0, a1, b0, b1, c0, d0, x0, x1 are parameters that change for protons and helium (0, +, ++)
464 //
465 // f0 has been added to the code in order to manage partial (shell-dependent) cross sections
466 // (if no shell dependence is present. f0=1. Sum of f0 over the considered shells should give 1)
467 //
468 // From Rad. Phys. and Chem. 59 (2000) 255-275, M. Dingfelder et al.
469 // Inelastic-collision cross sections of liquid water for interactions of energetic proton
470 //
471
472 if (x1[index][particleTypeIndex] < x0[index][particleTypeIndex])
473 {
474 //
475 // if x1 < x0 means that x1 and b1 will be calculated with the following formula
476 // (this piece of code is run on all alphas and not on protons)
477 //
478 // x1 = x0 + ((a0 - a1)/(c0 * d0)) ^ (1 / (d0 - 1))
479 //
480 // b1 = (a0 - a1) * x1 + b0 - c0 * (x1 - x0) ^ d0
481 //
482
483 x1[index][particleTypeIndex] = x0[index][particleTypeIndex]
484 + std::pow((a0[index][particleTypeIndex] - a1[index][particleTypeIndex])
485 / (c0[index][particleTypeIndex]
486 * d0[index][particleTypeIndex]),
487 1. / (d0[index][particleTypeIndex] - 1.));
488 b1[index][particleTypeIndex] = (a0[index][particleTypeIndex]
489 - a1[index][particleTypeIndex]) * x1[index][particleTypeIndex]
490 + b0[index][particleTypeIndex]
491 - c0[index][particleTypeIndex]
492 * std::pow(x1[index][particleTypeIndex]
493 - x0[index][particleTypeIndex],
494 d0[index][particleTypeIndex]);
495 }
496
497 G4double x(std::log10(k / eV));
498 G4double y;
499
500 if (x < x0[index][particleTypeIndex])
501 y = a0[index][particleTypeIndex] * x + b0[index][particleTypeIndex];
502 else if (x < x1[index][particleTypeIndex])
503 y = a0[index][particleTypeIndex] * x + b0[index][particleTypeIndex]
504 - c0[index][particleTypeIndex]
505 * std::pow(x - x0[index][particleTypeIndex],
506 d0[index][particleTypeIndex]);
507 else
508 y = a1[index][particleTypeIndex] * x + b1[index][particleTypeIndex];
509
510 return f0[index][particleTypeIndex] * std::pow(10., y) * m * m;
511
512}
513
514//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
515
516G4int G4DNADingfelderChargeIncreaseModel::RandomSelect(G4double k,
517 const G4ParticleDefinition* particleDefinition)
518{
519 G4int particleTypeIndex = 0;
520 G4DNAGenericIonsManager *instance;
521 instance = G4DNAGenericIonsManager::Instance();
522
523 if (particleDefinition == instance->GetIon("hydrogen"))
524 return 0;
525
526 if (particleDefinition == instance->GetIon("alpha+"))
527 particleTypeIndex = 0;
528
529 if (particleDefinition == instance->GetIon("helium"))
530 particleTypeIndex = 1;
531
532 const G4int n = numberOfPartialCrossSections[particleTypeIndex];
533 G4double* values(new G4double[n]);
534 G4double value = 0;
535 G4int i = n;
536
537 while (i > 0)
538 {
539 i--;
540 values[i] = PartialCrossSection(k, i, particleDefinition);
541 value += values[i];
542 }
543
544 value *= G4UniformRand();
545
546 i = n;
547 while (i > 0)
548 {
549 i--;
550
551 if (values[i] > value)
552 break;
553
554 value -= values[i];
555 }
556
557 delete[] values;
558
559 return i;
560}
561
562//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
563
564G4double G4DNADingfelderChargeIncreaseModel::Sum(G4double k,
565 const G4ParticleDefinition* particleDefinition)
566{
567 G4int particleTypeIndex = 0;
568 G4DNAGenericIonsManager *instance;
569 instance = G4DNAGenericIonsManager::Instance();
570
571 if (particleDefinition == instance->GetIon("alpha+"))
572 particleTypeIndex = 0;
573
574 if (particleDefinition == instance->GetIon("helium"))
575 particleTypeIndex = 1;
576
577 G4double totalCrossSection = 0.;
578
579 for (G4int i = 0; i < numberOfPartialCrossSections[particleTypeIndex]; i++)
580 {
581 totalCrossSection += PartialCrossSection(k, i, particleDefinition);
582 }
583
584 return totalCrossSection;
585}
FatalException
@ FatalException
Definition: G4ExceptionSeverity.hh:61
G4Exception
void G4Exception(const char *originOfException, const char *exceptionCode, G4ExceptionSeverity severity, const char *description)
Definition: G4Exception.cc:35
fStopAndKill
@ fStopAndKill
Definition: G4TrackStatus.hh:46
G4double
double G4double
Definition: G4Types.hh:83
G4int
int G4int
Definition: G4Types.hh:85
G4endl
#define G4endl
Definition: G4ios.hh:57
G4cout
G4GLOB_DLL std::ostream G4cout
G4UniformRand
#define G4UniformRand()
Definition: Randomize.hh:52
G4DNADingfelderChargeIncreaseModel::Initialise
virtual void Initialise(const G4ParticleDefinition *, const G4DataVector &)
Definition: G4DNADingfelderChargeIncreaseModel.cc:74
G4DNADingfelderChargeIncreaseModel::G4DNADingfelderChargeIncreaseModel
G4DNADingfelderChargeIncreaseModel(const G4ParticleDefinition *p=0, const G4String &nam="DNADingfelderChargeIncreaseModel")
Definition: G4DNADingfelderChargeIncreaseModel.cc:39
G4DNADingfelderChargeIncreaseModel::SampleSecondaries
virtual void SampleSecondaries(std::vector< G4DynamicParticle * > *, const G4MaterialCutsCouple *, const G4DynamicParticle *, G4double tmin, G4double maxEnergy)
Definition: G4DNADingfelderChargeIncreaseModel.cc:292
G4DNADingfelderChargeIncreaseModel::CrossSectionPerVolume
virtual G4double CrossSectionPerVolume(const G4Material *material, const G4ParticleDefinition *p, G4double ekin, G4double emin, G4double emax)
Definition: G4DNADingfelderChargeIncreaseModel.cc:196
G4DNAGenericIonsManager::Instance
static G4DNAGenericIonsManager * Instance(void)
Definition: G4DNAGenericIonsManager.cc:35
G4DNAGenericIonsManager::GetIon
G4ParticleDefinition * GetIon(const G4String &name)
Definition: G4DNAGenericIonsManager.cc:45
G4DNAMolecularMaterial::GetNumMolPerVolTableFor
const std::vector< G4double > * GetNumMolPerVolTableFor(const G4Material *) const
Retrieve a table of molecular densities (number of molecules per unit volume) in the G4 unit system f...
Definition: G4DNAMolecularMaterial.cc:418
G4DNAMolecularMaterial::Instance
static G4DNAMolecularMaterial * Instance()
Definition: G4DNAMolecularMaterial.cc:80
G4DynamicParticle::GetMomentumDirection
const G4ThreeVector & GetMomentumDirection() const
G4DynamicParticle::GetDefinition
G4ParticleDefinition * GetDefinition() const
G4DynamicParticle::GetKineticEnergy
G4double GetKineticEnergy() const
G4Electron::Electron
static G4Electron * Electron()
Definition: G4Electron.cc:93
G4Material::GetIndex
size_t GetIndex() const
Definition: G4Material.hh:258
G4Material::GetMaterial
static G4Material * GetMaterial(const G4String &name, G4bool warning=true)
Definition: G4Material.cc:651
G4ParticleDefinition::GetParticleName
const G4String & GetParticleName() const
Definition: G4ParticleDefinition.hh:108
G4Proton::Proton
static G4Proton * Proton()
Definition: G4Proton.cc:92
G4VEmModel::SetHighEnergyLimit
void SetHighEnergyLimit(G4double)
Definition: G4VEmModel.hh:757
G4VEmModel::GetParticleChangeForGamma
G4ParticleChangeForGamma * GetParticleChangeForGamma()
Definition: G4VEmModel.cc:133
G4VEmModel::LowEnergyLimit
G4double LowEnergyLimit() const
Definition: G4VEmModel.hh:652
G4VEmModel::HighEnergyLimit
G4double HighEnergyLimit() const
Definition: G4VEmModel.hh:645
G4VEmModel::SetLowEnergyLimit
void SetLowEnergyLimit(G4double)
Definition: G4VEmModel.hh:764
G4VParticleChange::ProposeTrackStatus
void ProposeTrackStatus(G4TrackStatus status)
G4VParticleChange::ProposeLocalEnergyDeposit
void ProposeLocalEnergyDeposit(G4double anEnergyPart)