source: trunk/source/processes/electromagnetic/lowenergy/src/G4FinalStateIonisationBorn.cc@ 1314

Last change on this file since 1314 was 1228, checked in by garnier, 16 years ago

update geant4.9.3 tag
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1//
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24// ********************************************************************
25//
26// $Id: G4FinalStateIonisationBorn.cc,v 1.19 2009/06/11 15:47:08 mantero Exp $
27// GEANT4 tag $Name: geant4-09-03 $
28
29#include "G4FinalStateIonisationBorn.hh"
30
31//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
32
33G4FinalStateIonisationBorn::G4FinalStateIonisationBorn()
34{
35 G4double scaleFactor = (1.e-22 / 3.343) * m*m;
36
37 G4ParticleDefinition* electronDef = G4Electron::ElectronDefinition();
38 G4ParticleDefinition* protonDef = G4Proton::ProtonDefinition();
39
40 G4String electron;
41 G4String proton;
42
43 lowEnergyLimitDefault = 12.61 * eV; // SI: i/o 25 eV
44 highEnergyLimitDefault = 10 * MeV;
45
46 char *path = getenv("G4LEDATA");
47
48 if (!path)
49 G4Exception("G4DNACrossSectionDataSet::FullFileName - G4LEDATA environment variable not set");
50
51 if (electronDef != 0)
52 {
53 electron = electronDef->GetParticleName();
54 lowEnergyLimit[electron] = 12.61 * eV; // SI: i/o 25 eV
55 highEnergyLimit[electron] = 30. * keV;
56
57 std::ostringstream eFullFileName;
58 eFullFileName << path << "/dna/sigmadiff_ionisation_e_born.dat";
59 std::ifstream eDiffCrossSection(eFullFileName.str().c_str());
60 if (!eDiffCrossSection)
61 {
62 G4Exception("G4FinalStateIonisationBorn::ERROR OPENING electron DATA FILE");
63 }
64
65 eTdummyVec.push_back(0.);
66 while(!eDiffCrossSection.eof())
67 {
68 double tDummy;
69 double eDummy;
70 eDiffCrossSection>>tDummy>>eDummy;
71 if (tDummy != eTdummyVec.back()) eTdummyVec.push_back(tDummy);
72 for (int j=0; j<5; j++)
73 {
74 eDiffCrossSection>>eDiffCrossSectionData[j][tDummy][eDummy];
75
76 // SI - only if eof is not reached !
77 if (!eDiffCrossSection.eof()) eDiffCrossSectionData[j][tDummy][eDummy]*=scaleFactor;
78
79 eVecm[tDummy].push_back(eDummy);
80
81 }
82 }
83
84 }
85 else
86 {
87 G4Exception("G4FinalStateIonisationBorn Constructor: electron is not defined");
88 }
89
90 if (protonDef != 0)
91 {
92 proton = protonDef->GetParticleName();
93 lowEnergyLimit[proton] = 500. * keV;
94 highEnergyLimit[proton] = 10. * MeV;
95
96 std::ostringstream pFullFileName;
97 pFullFileName << path << "/dna/sigmadiff_ionisation_p_born.dat";
98 std::ifstream pDiffCrossSection(pFullFileName.str().c_str());
99 if (!pDiffCrossSection)
100 {
101 G4Exception("G4FinalStateIonisationBorn::ERROR OPENING proton DATA FILE");
102 }
103
104 pTdummyVec.push_back(0.);
105 while(!pDiffCrossSection.eof())
106 {
107 double tDummy;
108 double eDummy;
109 pDiffCrossSection>>tDummy>>eDummy;
110 if (tDummy != pTdummyVec.back()) pTdummyVec.push_back(tDummy);
111 for (int j=0; j<5; j++)
112 {
113 pDiffCrossSection>>pDiffCrossSectionData[j][tDummy][eDummy];
114
115 // SI - only if eof is not reached !
116 if (!pDiffCrossSection.eof()) pDiffCrossSectionData[j][tDummy][eDummy]*=scaleFactor;
117
118 pVecm[tDummy].push_back(eDummy);
119 }
120 }
121 }
122 else
123 {
124 G4Exception("G4FinalStateIonisationBorn Constructor: proton is not defined");
125 }
126
127 G4cout << G4endl;
128 G4cout << "*******************************************************************************" << G4endl;
129 G4cout << "*******************************************************************************" << G4endl;
130 G4cout << " The class G4FinalStateIonisationBorn is NOT SUPPORTED ANYMORE. " << G4endl;
131 G4cout << " It will be REMOVED with the next major release of Geant4. " << G4endl;
132 G4cout << " Please consult: https://twiki.cern.ch/twiki/bin/view/Geant4/LoweProcesses" << G4endl;
133 G4cout << "*******************************************************************************" << G4endl;
134 G4cout << "*******************************************************************************" << G4endl;
135 G4cout << G4endl;
136}
137
138//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
139
140G4FinalStateIonisationBorn::~G4FinalStateIonisationBorn()
141{
142 eVecm.clear();
143 pVecm.clear();
144}
145
146//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
147
148const G4FinalStateProduct& G4FinalStateIonisationBorn::GenerateFinalState(const G4Track& track, const G4Step& /* step */)
149{
150 product.Clear();
151
152 const G4DynamicParticle* particle = track.GetDynamicParticle();
153
154 G4double lowLim = lowEnergyLimitDefault;
155 G4double highLim = highEnergyLimitDefault;
156
157 G4double k = particle->GetKineticEnergy();
158
159 const G4String& particleName = particle->GetDefinition()->GetParticleName();
160
161 std::map< G4String,G4double,std::less<G4String> >::iterator pos1;
162 pos1 = lowEnergyLimit.find(particleName);
163
164 if (pos1 != lowEnergyLimit.end())
165 {
166 lowLim = pos1->second;
167 }
168
169 std::map< G4String,G4double,std::less<G4String> >::iterator pos2;
170 pos2 = highEnergyLimit.find(particleName);
171
172 if (pos2 != highEnergyLimit.end())
173 {
174 highLim = pos2->second;
175 }
176
177 if (k >= lowLim && k <= highLim)
178 {
179 G4ParticleMomentum primaryDirection = particle->GetMomentumDirection();
180 G4double particleMass = particle->GetDefinition()->GetPDGMass();
181 G4double totalEnergy = k + particleMass;
182 G4double pSquare = k * (totalEnergy + particleMass);
183 G4double totalMomentum = std::sqrt(pSquare);
184
185 const G4String& particleName = particle->GetDefinition()->GetParticleName();
186
187 G4int ionizationShell = cross.RandomSelect(k,particleName);
188
189 G4double secondaryKinetic = RandomizeEjectedElectronEnergy(particle->GetDefinition(),k,ionizationShell);
190
191 G4double bindingEnergy = waterStructure.IonisationEnergy(ionizationShell);
192
193 G4double cosTheta = 0.;
194 G4double phi = 0.;
195 RandomizeEjectedElectronDirection(track.GetDefinition(), k,secondaryKinetic, cosTheta, phi);
196
197 G4double sinTheta = std::sqrt(1.-cosTheta*cosTheta);
198 G4double dirX = sinTheta*std::cos(phi);
199 G4double dirY = sinTheta*std::sin(phi);
200 G4double dirZ = cosTheta;
201 G4ThreeVector deltaDirection(dirX,dirY,dirZ);
202 deltaDirection.rotateUz(primaryDirection);
203
204 G4double deltaTotalMomentum = std::sqrt(secondaryKinetic*(secondaryKinetic + 2.*electron_mass_c2 ));
205
206 G4double finalPx = totalMomentum*primaryDirection.x() - deltaTotalMomentum*deltaDirection.x();
207 G4double finalPy = totalMomentum*primaryDirection.y() - deltaTotalMomentum*deltaDirection.y();
208 G4double finalPz = totalMomentum*primaryDirection.z() - deltaTotalMomentum*deltaDirection.z();
209 G4double finalMomentum = std::sqrt(finalPx*finalPx + finalPy*finalPy + finalPz*finalPz);
210 finalPx /= finalMomentum;
211 finalPy /= finalMomentum;
212 finalPz /= finalMomentum;
213
214 product.ModifyPrimaryParticle(finalPx,finalPy,finalPz,k-bindingEnergy-secondaryKinetic);
215 product.AddEnergyDeposit(bindingEnergy);
216
217 G4DynamicParticle* aElectron = new G4DynamicParticle(G4Electron::Electron(),deltaDirection,secondaryKinetic);
218 product.AddSecondary(aElectron);
219 }
220
221 return product;
222}
223
224//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
225
226G4double G4FinalStateIonisationBorn::RandomizeEjectedElectronEnergy(G4ParticleDefinition* particleDefinition,
227G4double k, G4int shell)
228{
229 if (particleDefinition == G4Electron::ElectronDefinition())
230 {
231 G4double maximumEnergyTransfer=0.;
232 if ((k+waterStructure.IonisationEnergy(shell))/2. > k) maximumEnergyTransfer=k;
233 else maximumEnergyTransfer = (k+waterStructure.IonisationEnergy(shell))/2.;
234
235 G4double crossSectionMaximum = 0.;
236 for(G4double value=waterStructure.IonisationEnergy(shell); value<=maximumEnergyTransfer; value+=0.1*eV)
237 {
238 G4double differentialCrossSection = DifferentialCrossSection(particleDefinition, k/eV, value/eV, shell);
239 if(differentialCrossSection >= crossSectionMaximum) crossSectionMaximum = differentialCrossSection;
240 }
241
242 G4double secondaryElectronKineticEnergy=0.;
243 do
244 {
245 secondaryElectronKineticEnergy = G4UniformRand() * (maximumEnergyTransfer-waterStructure.IonisationEnergy(shell));
246 } while(G4UniformRand()*crossSectionMaximum >
247 DifferentialCrossSection(particleDefinition, k/eV,(secondaryElectronKineticEnergy+waterStructure.IonisationEnergy(shell))/eV,shell));
248
249 return secondaryElectronKineticEnergy;
250
251 }
252
253 if (particleDefinition == G4Proton::ProtonDefinition())
254 {
255 G4double maximumKineticEnergyTransfer = 4.* (electron_mass_c2 / proton_mass_c2) * k - (waterStructure.IonisationEnergy(shell));
256
257 G4double crossSectionMaximum = 0.;
258 for (G4double value = waterStructure.IonisationEnergy(shell);
259 value<=4.*waterStructure.IonisationEnergy(shell) ;
260 value+=0.1*eV)
261 {
262 G4double differentialCrossSection = DifferentialCrossSection(particleDefinition, k/eV, value/eV, shell);
263 if (differentialCrossSection >= crossSectionMaximum) crossSectionMaximum = differentialCrossSection;
264 }
265
266 G4double secondaryElectronKineticEnergy = 0.;
267 do
268 {
269 secondaryElectronKineticEnergy = G4UniformRand() * maximumKineticEnergyTransfer;
270 } while(G4UniformRand()*crossSectionMaximum >=
271 DifferentialCrossSection(particleDefinition, k/eV,(secondaryElectronKineticEnergy+waterStructure.IonisationEnergy(shell))/eV,shell));
272
273 return secondaryElectronKineticEnergy;
274 }
275
276 return 0;
277}
278
279//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
280
281void G4FinalStateIonisationBorn::RandomizeEjectedElectronDirection(G4ParticleDefinition* particleDefinition,
282 G4double k,
283 G4double secKinetic,
284 G4double & cosTheta,
285 G4double & phi )
286{
287 if (particleDefinition == G4Electron::ElectronDefinition())
288 {
289 phi = twopi * G4UniformRand();
290 if (secKinetic < 50.*eV) cosTheta = (2.*G4UniformRand())-1.;
291 else if (secKinetic <= 200.*eV)
292 {
293 if (G4UniformRand() <= 0.1) cosTheta = (2.*G4UniformRand())-1.;
294 else cosTheta = G4UniformRand()*(std::sqrt(2.)/2);
295 }
296 else
297 {
298 G4double sin2O = (1.-secKinetic/k) / (1.+secKinetic/(2.*electron_mass_c2));
299 cosTheta = std::sqrt(1.-sin2O);
300 }
301 }
302
303 if (particleDefinition == G4Proton::ProtonDefinition())
304 {
305 G4double maxSecKinetic = 4.* (electron_mass_c2 / proton_mass_c2) * k;
306 phi = twopi * G4UniformRand();
307 cosTheta = std::sqrt(secKinetic / maxSecKinetic);
308 }
309}
310
311//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
312
313double G4FinalStateIonisationBorn::DifferentialCrossSection(G4ParticleDefinition * particleDefinition,
314 G4double k,
315 G4double energyTransfer,
316 G4int ionizationLevelIndex)
317{
318 G4double sigma = 0.;
319
320 if (energyTransfer >= waterStructure.IonisationEnergy(ionizationLevelIndex))
321 {
322 G4double valueT1 = 0;
323 G4double valueT2 = 0;
324 G4double valueE21 = 0;
325 G4double valueE22 = 0;
326 G4double valueE12 = 0;
327 G4double valueE11 = 0;
328
329 G4double xs11 = 0;
330 G4double xs12 = 0;
331 G4double xs21 = 0;
332 G4double xs22 = 0;
333
334 if (particleDefinition == G4Electron::ElectronDefinition())
335 {
336 // k should be in eV and energy transfer eV also
337
338 std::vector<double>::iterator t2 = std::upper_bound(eTdummyVec.begin(),eTdummyVec.end(), k);
339
340 std::vector<double>::iterator t1 = t2-1;
341
342 // SI : the following condition avoids situations where energyTransfer >last vector element
343 if (energyTransfer <= eVecm[(*t1)].back())
344 {
345 std::vector<double>::iterator e12 = std::upper_bound(eVecm[(*t1)].begin(),eVecm[(*t1)].end(), energyTransfer);
346 std::vector<double>::iterator e11 = e12-1;
347
348 std::vector<double>::iterator e22 = std::upper_bound(eVecm[(*t2)].begin(),eVecm[(*t2)].end(), energyTransfer);
349 std::vector<double>::iterator e21 = e22-1;
350
351 valueT1 =*t1;
352 valueT2 =*t2;
353 valueE21 =*e21;
354 valueE22 =*e22;
355 valueE12 =*e12;
356 valueE11 =*e11;
357
358 xs11 = eDiffCrossSectionData[ionizationLevelIndex][valueT1][valueE11];
359 xs12 = eDiffCrossSectionData[ionizationLevelIndex][valueT1][valueE12];
360 xs21 = eDiffCrossSectionData[ionizationLevelIndex][valueT2][valueE21];
361 xs22 = eDiffCrossSectionData[ionizationLevelIndex][valueT2][valueE22];
362 }
363
364 }
365
366 if (particleDefinition == G4Proton::ProtonDefinition())
367 {
368 // k should be in eV and energy transfer eV also
369 std::vector<double>::iterator t2 = std::upper_bound(pTdummyVec.begin(),pTdummyVec.end(), k);
370 std::vector<double>::iterator t1 = t2-1;
371
372 std::vector<double>::iterator e12 = std::upper_bound(pVecm[(*t1)].begin(),pVecm[(*t1)].end(), energyTransfer);
373 std::vector<double>::iterator e11 = e12-1;
374
375 std::vector<double>::iterator e22 = std::upper_bound(pVecm[(*t2)].begin(),pVecm[(*t2)].end(), energyTransfer);
376 std::vector<double>::iterator e21 = e22-1;
377
378 valueT1 =*t1;
379 valueT2 =*t2;
380 valueE21 =*e21;
381 valueE22 =*e22;
382 valueE12 =*e12;
383 valueE11 =*e11;
384
385 xs11 = pDiffCrossSectionData[ionizationLevelIndex][valueT1][valueE11];
386 xs12 = pDiffCrossSectionData[ionizationLevelIndex][valueT1][valueE12];
387 xs21 = pDiffCrossSectionData[ionizationLevelIndex][valueT2][valueE21];
388 xs22 = pDiffCrossSectionData[ionizationLevelIndex][valueT2][valueE22];
389
390 }
391
392 G4double xsProduct = xs11 * xs12 * xs21 * xs22;
393 if (xsProduct != 0.)
394 {
395 sigma = QuadInterpolator( valueE11, valueE12,
396 valueE21, valueE22,
397 xs11, xs12,
398 xs21, xs22,
399 valueT1, valueT2,
400 k, energyTransfer);
401 }
402
403 }
404
405 return sigma;
406}
407
408//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
409
410G4double G4FinalStateIonisationBorn::LogLogInterpolate(G4double e1,
411 G4double e2,
412 G4double e,
413 G4double xs1,
414 G4double xs2)
415{
416 G4double a = (std::log10(xs2)-std::log10(xs1)) / (std::log10(e2)-std::log10(e1));
417 G4double b = std::log10(xs2) - a*std::log10(e2);
418 G4double sigma = a*std::log10(e) + b;
419 G4double value = (std::pow(10.,sigma));
420 return value;
421}
422
423//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
424
425G4double G4FinalStateIonisationBorn::QuadInterpolator(G4double e11, G4double e12,
426 G4double e21, G4double e22,
427 G4double xs11, G4double xs12,
428 G4double xs21, G4double xs22,
429 G4double t1, G4double t2,
430 G4double t, G4double e)
431{
432 G4double interpolatedvalue1 = LogLogInterpolate(e11, e12, e, xs11, xs12);
433 G4double interpolatedvalue2 = LogLogInterpolate(e21, e22, e, xs21, xs22);
434 G4double value = LogLogInterpolate(t1, t2, t, interpolatedvalue1, interpolatedvalue2);
435 return value;
436}
437
438
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