source: trunk/source/processes/electromagnetic/lowenergy/src/G4DNAChampionElasticModel.cc@ 1346

Last change on this file since 1346 was 1340, checked in by garnier, 15 years ago

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[1058]1//
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25//
[1340]26// $Id: G4DNAChampionElasticModel.cc,v 1.15 2010/10/17 11:28:51 sincerti Exp $
27// GEANT4 tag $Name: emlowen-V09-03-54 $
[1058]28//
29
30#include "G4DNAChampionElasticModel.hh"
31
32//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
33
34using namespace std;
35
36//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
37
38G4DNAChampionElasticModel::G4DNAChampionElasticModel(const G4ParticleDefinition*,
39 const G4String& nam)
40:G4VEmModel(nam),isInitialised(false)
41{
42
[1340]43 killBelowEnergy = 0.025*eV; // Minimum e- energy for energy loss by excitation
[1058]44 lowEnergyLimit = 0 * eV;
[1340]45 lowEnergyLimitOfModel = 0.025 * eV;
46 highEnergyLimit = 1. * MeV;
[1058]47 SetLowEnergyLimit(lowEnergyLimit);
48 SetHighEnergyLimit(highEnergyLimit);
49
50 verboseLevel= 0;
51 // Verbosity scale:
52 // 0 = nothing
53 // 1 = warning for energy non-conservation
54 // 2 = details of energy budget
55 // 3 = calculation of cross sections, file openings, sampling of atoms
56 // 4 = entering in methods
57
[1192]58 if( verboseLevel>0 )
59 {
60 G4cout << "Champion Elastic model is constructed " << G4endl
61 << "Energy range: "
62 << lowEnergyLimit / eV << " eV - "
63 << highEnergyLimit / MeV << " MeV"
64 << G4endl;
65 }
[1058]66}
67
68//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
69
70G4DNAChampionElasticModel::~G4DNAChampionElasticModel()
71{
72 // For total cross section
73
74 std::map< G4String,G4DNACrossSectionDataSet*,std::less<G4String> >::iterator pos;
75 for (pos = tableData.begin(); pos != tableData.end(); ++pos)
76 {
77 G4DNACrossSectionDataSet* table = pos->second;
78 delete table;
79 }
80
81 // For final state
82
83 eVecm.clear();
84
85}
86
87//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
88
89void G4DNAChampionElasticModel::Initialise(const G4ParticleDefinition* /*particle*/,
90 const G4DataVector& /*cuts*/)
91{
92
93 if (verboseLevel > 3)
94 G4cout << "Calling G4DNAChampionElasticModel::Initialise()" << G4endl;
95
96 // Energy limits
97
98 if (LowEnergyLimit() < lowEnergyLimit)
99 {
100 G4cout << "G4DNAChampionElasticModel: low energy limit increased from " <<
101 LowEnergyLimit()/eV << " eV to " << lowEnergyLimit/eV << " eV" << G4endl;
102 SetLowEnergyLimit(lowEnergyLimit);
103 }
104
105 if (HighEnergyLimit() > highEnergyLimit)
106 {
107 G4cout << "G4DNAChampionElasticModel: high energy limit decreased from " <<
108 HighEnergyLimit()/MeV << " MeV to " << highEnergyLimit/MeV << " MeV" << G4endl;
109 SetHighEnergyLimit(highEnergyLimit);
110 }
111
112 // Reading of data files
113
114 G4double scaleFactor = 1e-16*cm*cm;
115
116 G4String fileElectron("dna/sigma_elastic_e_champion");
117
118 G4ParticleDefinition* electronDef = G4Electron::ElectronDefinition();
119 G4String electron;
120
121 if (electronDef != 0)
122 {
123 // For total cross section
124
125 electron = electronDef->GetParticleName();
126
127 tableFile[electron] = fileElectron;
128
129 G4DNACrossSectionDataSet* tableE = new G4DNACrossSectionDataSet(new G4LogLogInterpolation, eV,scaleFactor );
130 tableE->LoadData(fileElectron);
131 tableData[electron] = tableE;
132
133 // For final state
[1315]134
[1058]135 char *path = getenv("G4LEDATA");
136
137 if (!path)
138 G4Exception("G4FinalStateElasticChampion::Initialise: G4LEDATA environment variable not set");
139
140 std::ostringstream eFullFileName;
[1340]141 eFullFileName << path << "/dna/sigmadiff_cumulatedshort_elastic_e_champion.dat";
[1058]142 std::ifstream eDiffCrossSection(eFullFileName.str().c_str());
143
144 if (!eDiffCrossSection) G4Exception("G4DNAChampionElasticModel::Initialise: error opening electron DATA FILE");
145
146 eTdummyVec.push_back(0.);
147
148 while(!eDiffCrossSection.eof())
149 {
150 double tDummy;
151 double eDummy;
152 eDiffCrossSection>>tDummy>>eDummy;
[1315]153
[1058]154 // SI : mandatory eVecm initialization
[1315]155
[1058]156 if (tDummy != eTdummyVec.back())
157 {
158 eTdummyVec.push_back(tDummy);
159 eVecm[tDummy].push_back(0.);
160 }
161
162 eDiffCrossSection>>eDiffCrossSectionData[tDummy][eDummy];
163
164 if (eDummy != eVecm[tDummy].back()) eVecm[tDummy].push_back(eDummy);
[1315]165
[1058]166 }
167
168 // End final state
169
170 }
171 else G4Exception("G4DNAChampionElasticModel::Initialise: electron is not defined");
172
173 if (verboseLevel > 2)
174 G4cout << "Loaded cross section files for Champion Elastic model" << G4endl;
175
[1192]176 if( verboseLevel>0 )
177 {
178 G4cout << "Champion Elastic model is initialized " << G4endl
179 << "Energy range: "
180 << LowEnergyLimit() / eV << " eV - "
181 << HighEnergyLimit() / MeV << " MeV"
182 << G4endl;
183 }
[1058]184
185 if(!isInitialised)
186 {
187 isInitialised = true;
188
189 if(pParticleChange)
190 fParticleChangeForGamma = reinterpret_cast<G4ParticleChangeForGamma*>(pParticleChange);
191 else
192 fParticleChangeForGamma = new G4ParticleChangeForGamma();
193 }
194
195 // InitialiseElementSelectors(particle,cuts);
196
197}
198
199//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
200
[1315]201G4double G4DNAChampionElasticModel::CrossSectionPerVolume(const G4Material* material,
[1058]202 const G4ParticleDefinition* p,
203 G4double ekin,
204 G4double,
205 G4double)
206{
207 if (verboseLevel > 3)
208 G4cout << "Calling CrossSectionPerVolume() of G4DNAChampionElasticModel" << G4endl;
209
210 // Calculate total cross section for model
211
212 G4double sigma=0;
213
[1315]214 if (material->GetName() == "G4_WATER")
[1058]215 {
216 const G4String& particleName = p->GetParticleName();
217
218 if (ekin < highEnergyLimit)
219 {
220 //SI : XS must not be zero otherwise sampling of secondaries method ignored
221 if (ekin < lowEnergyLimitOfModel) ekin = lowEnergyLimitOfModel;
222 //
223
224 std::map< G4String,G4DNACrossSectionDataSet*,std::less<G4String> >::iterator pos;
225 pos = tableData.find(particleName);
226
227 if (pos != tableData.end())
228 {
229 G4DNACrossSectionDataSet* table = pos->second;
230 if (table != 0)
231 {
232 sigma = table->FindValue(ekin);
233 }
234 }
235 else
236 {
237 G4Exception("G4DNAChampionElasticModel::ComputeCrossSectionPerVolume: attempting to calculate cross section for wrong particle");
238 }
239 }
240
241 if (verboseLevel > 3)
242 {
243 G4cout << "---> Kinetic energy(eV)=" << ekin/eV << G4endl;
244 G4cout << " - Cross section per water molecule (cm^2)=" << sigma/cm/cm << G4endl;
[1315]245 G4cout << " - Cross section per water molecule (cm^-1)=" << sigma*material->GetAtomicNumDensityVector()[1]/(1./cm) << G4endl;
[1058]246 }
247
[1315]248 }
[1058]249
[1315]250 return sigma*material->GetAtomicNumDensityVector()[1];
[1058]251}
252
253//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
254
255void G4DNAChampionElasticModel::SampleSecondaries(std::vector<G4DynamicParticle*>* /*fvect*/,
256 const G4MaterialCutsCouple* /*couple*/,
257 const G4DynamicParticle* aDynamicElectron,
258 G4double,
259 G4double)
260{
261
262 if (verboseLevel > 3)
263 G4cout << "Calling SampleSecondaries() of G4DNAChampionElasticModel" << G4endl;
264
265 G4double electronEnergy0 = aDynamicElectron->GetKineticEnergy();
266
267 if (electronEnergy0 < killBelowEnergy)
268 {
269 fParticleChangeForGamma->ProposeTrackStatus(fStopAndKill);
270 fParticleChangeForGamma->ProposeLocalEnergyDeposit(electronEnergy0);
271 return ;
272 }
273
274 if (electronEnergy0>= killBelowEnergy && electronEnergy0 < highEnergyLimit)
275 {
[1315]276
[1058]277 G4double cosTheta = RandomizeCosTheta(electronEnergy0);
278
279 G4double phi = 2. * pi * G4UniformRand();
280
281 G4ThreeVector zVers = aDynamicElectron->GetMomentumDirection();
282 G4ThreeVector xVers = zVers.orthogonal();
283 G4ThreeVector yVers = zVers.cross(xVers);
284
285 G4double xDir = std::sqrt(1. - cosTheta*cosTheta);
286 G4double yDir = xDir;
287 xDir *= std::cos(phi);
288 yDir *= std::sin(phi);
289
290 G4ThreeVector zPrimeVers((xDir*xVers + yDir*yVers + cosTheta*zVers));
291
292 fParticleChangeForGamma->ProposeMomentumDirection(zPrimeVers.unit()) ;
293
294 fParticleChangeForGamma->SetProposedKineticEnergy(electronEnergy0);
295 }
296
297}
298
299//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
300
[1315]301G4double G4DNAChampionElasticModel::Theta
302 (G4ParticleDefinition * particleDefinition, G4double k, G4double integrDiff)
[1058]303{
[1315]304 G4double theta = 0.;
[1058]305 G4double valueT1 = 0;
306 G4double valueT2 = 0;
307 G4double valueE21 = 0;
308 G4double valueE22 = 0;
309 G4double valueE12 = 0;
310 G4double valueE11 = 0;
311 G4double xs11 = 0;
312 G4double xs12 = 0;
313 G4double xs21 = 0;
314 G4double xs22 = 0;
315
316 if (particleDefinition == G4Electron::ElectronDefinition())
317 {
318 std::vector<double>::iterator t2 = std::upper_bound(eTdummyVec.begin(),eTdummyVec.end(), k);
319 std::vector<double>::iterator t1 = t2-1;
320
[1315]321 std::vector<double>::iterator e12 = std::upper_bound(eVecm[(*t1)].begin(),eVecm[(*t1)].end(), integrDiff);
[1058]322 std::vector<double>::iterator e11 = e12-1;
323
[1315]324 std::vector<double>::iterator e22 = std::upper_bound(eVecm[(*t2)].begin(),eVecm[(*t2)].end(), integrDiff);
[1058]325 std::vector<double>::iterator e21 = e22-1;
326
327 valueT1 =*t1;
328 valueT2 =*t2;
329 valueE21 =*e21;
330 valueE22 =*e22;
331 valueE12 =*e12;
332 valueE11 =*e11;
333
334 xs11 = eDiffCrossSectionData[valueT1][valueE11];
335 xs12 = eDiffCrossSectionData[valueT1][valueE12];
336 xs21 = eDiffCrossSectionData[valueT2][valueE21];
337 xs22 = eDiffCrossSectionData[valueT2][valueE22];
[1315]338 }
[1058]339
[1315]340 if (xs11==0 && xs12==0 && xs21==0 && xs22==0) return (0.);
341
342 theta = QuadInterpolator ( valueE11, valueE12,
[1058]343 valueE21, valueE22,
344 xs11, xs12,
345 xs21, xs22,
346 valueT1, valueT2,
[1315]347 k, integrDiff );
348
349 return theta;
[1058]350}
351
352//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
353
354G4double G4DNAChampionElasticModel::LinLogInterpolate(G4double e1,
355 G4double e2,
356 G4double e,
357 G4double xs1,
358 G4double xs2)
359{
360 G4double d1 = std::log(xs1);
361 G4double d2 = std::log(xs2);
362 G4double value = std::exp(d1 + (d2 - d1)*(e - e1)/ (e2 - e1));
363 return value;
364}
365
366//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
367
[1315]368G4double G4DNAChampionElasticModel::LinLinInterpolate(G4double e1,
369 G4double e2,
370 G4double e,
371 G4double xs1,
372 G4double xs2)
373{
374 G4double d1 = xs1;
375 G4double d2 = xs2;
376 G4double value = (d1 + (d2 - d1)*(e - e1)/ (e2 - e1));
377 return value;
378}
379
380//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
381
[1058]382G4double G4DNAChampionElasticModel::LogLogInterpolate(G4double e1,
383 G4double e2,
384 G4double e,
385 G4double xs1,
386 G4double xs2)
387{
388 G4double a = (std::log10(xs2)-std::log10(xs1)) / (std::log10(e2)-std::log10(e1));
389 G4double b = std::log10(xs2) - a*std::log10(e2);
390 G4double sigma = a*std::log10(e) + b;
391 G4double value = (std::pow(10.,sigma));
392 return value;
393}
394
395//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
396
[1315]397
[1058]398G4double G4DNAChampionElasticModel::QuadInterpolator(G4double e11, G4double e12,
399 G4double e21, G4double e22,
400 G4double xs11, G4double xs12,
401 G4double xs21, G4double xs22,
402 G4double t1, G4double t2,
403 G4double t, G4double e)
404{
[1315]405 // Log-Log
[1058]406/*
407 G4double interpolatedvalue1 = LogLogInterpolate(e11, e12, e, xs11, xs12);
408 G4double interpolatedvalue2 = LogLogInterpolate(e21, e22, e, xs21, xs22);
409 G4double value = LogLogInterpolate(t1, t2, t, interpolatedvalue1, interpolatedvalue2);
410
[1315]411
412 // Lin-Log
[1058]413 G4double interpolatedvalue1 = LinLogInterpolate(e11, e12, e, xs11, xs12);
414 G4double interpolatedvalue2 = LinLogInterpolate(e21, e22, e, xs21, xs22);
415 G4double value = LinLogInterpolate(t1, t2, t, interpolatedvalue1, interpolatedvalue2);
[1315]416*/
417
418 // Lin-Lin
419 G4double interpolatedvalue1 = LinLinInterpolate(e11, e12, e, xs11, xs12);
420 G4double interpolatedvalue2 = LinLinInterpolate(e21, e22, e, xs21, xs22);
421 G4double value = LinLinInterpolate(t1, t2, t, interpolatedvalue1, interpolatedvalue2);
422
[1058]423 return value;
424}
425
426//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
427
428G4double G4DNAChampionElasticModel::RandomizeCosTheta(G4double k)
429{
430
[1315]431 G4double integrdiff=0;
432 G4double uniformRand=G4UniformRand();
433 integrdiff = uniformRand;
434
435 G4double theta=0.;
436 G4double cosTheta=0.;
437 theta = Theta(G4Electron::ElectronDefinition(),k/eV,integrdiff);
[1058]438
[1315]439 cosTheta= std::cos(theta*pi/180);
[1058]440
441 return cosTheta;
442}
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