| Geant4 Cross Reference |
1 // 1 //
2 // ******************************************* 2 // ********************************************************************
3 // * License and Disclaimer 3 // * License and Disclaimer *
4 // * 4 // * *
5 // * The Geant4 software is copyright of th 5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided 6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License 7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/ 8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. 9 // * include a list of copyright holders. *
10 // * 10 // * *
11 // * Neither the authors of this software syst 11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing fin 12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warran 13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assum 14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file 15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. *
17 // * 17 // * *
18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. *
24 // ******************************************* 24 // ********************************************************************
25 // 25 //
>> 26 // $Id$
26 // 27 //
27 // Authors: G.Depaola & F.Longo 28 // Authors: G.Depaola & F.Longo
28 // 29 //
29 // History: 30 // History:
30 // ------- << 31 // --------
31 // <<
32 // 05 Apr 2021 J Allison added quantum entan <<
33 // If the photons have been "tagged" as "quant <<
34 // G4eplusAnnihilation for annihilation into 2 <<
35 // here if - and only if - both photons suffer <<
36 // predictions from Pryce and Ward, Nature No <<
37 // Physical Review 73 (1948) p.440. Experiment <<
38 // entanglement in the MeV regime and its appl <<
39 // D. Watts, J. Allison et al., Nature Communi <<
40 // https://doi.org/10.1038/s41467-021-22907-5. <<
41 // <<
42 // 02 May 2009 S Incerti as V. Ivanchenko pr 32 // 02 May 2009 S Incerti as V. Ivanchenko proposed in G4LivermoreComptonModel.cc
43 // 33 //
44 // Cleanup initialisation and generation of se 34 // Cleanup initialisation and generation of secondaries:
45 // - apply internal high-ener 35 // - apply internal high-energy limit only in constructor
46 // - do not apply low-energy 36 // - do not apply low-energy limit (default is 0)
47 // - remove GetMeanFreePath m 37 // - remove GetMeanFreePath method and table
48 // - added protection against 38 // - added protection against numerical problem in energy sampling
49 // - use G4ElementSelector 39 // - use G4ElementSelector
50 40
51 #include "G4LivermorePolarizedComptonModel.hh" 41 #include "G4LivermorePolarizedComptonModel.hh"
52 #include "G4PhysicalConstants.hh" 42 #include "G4PhysicalConstants.hh"
53 #include "G4SystemOfUnits.hh" 43 #include "G4SystemOfUnits.hh"
54 #include "G4AutoLock.hh" <<
55 #include "G4Electron.hh" <<
56 #include "G4ParticleChangeForGamma.hh" <<
57 #include "G4LossTableManager.hh" <<
58 #include "G4VAtomDeexcitation.hh" <<
59 #include "G4AtomicShell.hh" <<
60 #include "G4Gamma.hh" <<
61 #include "G4ShellData.hh" <<
62 #include "G4DopplerProfile.hh" <<
63 #include "G4Log.hh" <<
64 #include "G4Exp.hh" <<
65 #include "G4Pow.hh" <<
66 #include "G4LogLogInterpolation.hh" <<
67 #include "G4PhysicsModelCatalog.hh" <<
68 #include "G4EntanglementAuxInfo.hh" <<
69 #include "G4eplusAnnihilationEntanglementClipB <<
70 44
71 //....oooOO0OOooo........oooOO0OOooo........oo 45 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
72 46
73 using namespace std; 47 using namespace std;
74 namespace { G4Mutex LivermorePolarizedComptonM <<
75 <<
76 <<
77 G4PhysicsFreeVector* G4LivermorePolarizedCompt <<
78 G4ShellData* G4LivermorePolarizedCompton <<
79 G4DopplerProfile* G4LivermorePolarizedCompton <<
80 G4CompositeEMDataSet* G4LivermorePolarizedComp <<
81 48
82 //....oooOO0OOooo........oooOO0OOooo........oo 49 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
83 50
84 G4LivermorePolarizedComptonModel::G4LivermoreP << 51 G4LivermorePolarizedComptonModel::G4LivermorePolarizedComptonModel(const G4ParticleDefinition*,
85 :G4VEmModel(nam),isInitialised(false) << 52 const G4String& nam)
86 { << 53 :G4VEmModel(nam),fParticleChange(0),isInitialised(false),
87 verboseLevel= 1; << 54 meanFreePathTable(0),scatterFunctionData(0),crossSectionHandler(0)
>> 55 {
>> 56 lowEnergyLimit = 250 * eV;
>> 57 highEnergyLimit = 100 * GeV;
>> 58 //SetLowEnergyLimit(lowEnergyLimit);
>> 59 SetHighEnergyLimit(highEnergyLimit);
>> 60
>> 61 verboseLevel= 0;
88 // Verbosity scale: 62 // Verbosity scale:
89 // 0 = nothing 63 // 0 = nothing
90 // 1 = warning for energy non-conservation 64 // 1 = warning for energy non-conservation
91 // 2 = details of energy budget 65 // 2 = details of energy budget
92 // 3 = calculation of cross sections, file o 66 // 3 = calculation of cross sections, file openings, sampling of atoms
93 // 4 = entering in methods 67 // 4 = entering in methods
94 68
95 if( verboseLevel>1 ) << 69 if( verboseLevel>0 ) {
96 G4cout << "Livermore Polarized Compton is << 70 G4cout << "Livermore Polarized Compton is constructed " << G4endl
97 << 71 << "Energy range: "
98 //Mark this model as "applicable" for atomic << 72 << lowEnergyLimit / eV << " eV - "
99 SetDeexcitationFlag(true); << 73 << highEnergyLimit / GeV << " GeV"
100 << 74 << G4endl;
101 fParticleChange = nullptr; << 75 }
102 fAtomDeexcitation = nullptr; <<
103 fEntanglementModelID = G4PhysicsModelCatalog <<
104 } 76 }
105 77
106 //....oooOO0OOooo........oooOO0OOooo........oo 78 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
107 79
108 G4LivermorePolarizedComptonModel::~G4Livermore 80 G4LivermorePolarizedComptonModel::~G4LivermorePolarizedComptonModel()
109 { 81 {
110 if(IsMaster()) { << 82 if (meanFreePathTable) delete meanFreePathTable;
111 delete shellData; << 83 if (crossSectionHandler) delete crossSectionHandler;
112 shellData = nullptr; << 84 if (scatterFunctionData) delete scatterFunctionData;
113 delete profileData; <<
114 profileData = nullptr; <<
115 delete scatterFunctionData; <<
116 scatterFunctionData = nullptr; <<
117 for(G4int i=0; i<maxZ; ++i) { <<
118 if(data[i]) { <<
119 delete data[i]; <<
120 data[i] = nullptr; <<
121 } <<
122 } <<
123 } <<
124 } 85 }
125 86
126 //....oooOO0OOooo........oooOO0OOooo........oo 87 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
127 88
128 void G4LivermorePolarizedComptonModel::Initial 89 void G4LivermorePolarizedComptonModel::Initialise(const G4ParticleDefinition* particle,
129 const G 90 const G4DataVector& cuts)
130 { 91 {
131 if (verboseLevel > 1) << 92 if (verboseLevel > 3)
132 G4cout << "Calling G4LivermorePolarizedCom 93 G4cout << "Calling G4LivermorePolarizedComptonModel::Initialise()" << G4endl;
133 94
134 // Initialise element selector << 95 if (crossSectionHandler)
135 if(IsMaster()) { << 96 {
136 // Access to elements << 97 crossSectionHandler->Clear();
137 const char* path = G4FindDataDir("G4LEDATA << 98 delete crossSectionHandler;
138 <<
139 G4ProductionCutsTable* theCoupleTable = <<
140 G4ProductionCutsTable::GetProductionCuts <<
141 <<
142 G4int numOfCouples = (G4int)theCoupleTable <<
143 <<
144 for(G4int i=0; i<numOfCouples; ++i) { <<
145 const G4Material* material = <<
146 theCoupleTable->GetMaterialCutsCouple( <<
147 const G4ElementVector* theElementVector <<
148 std::size_t nelm = material->GetNumberOf <<
149 <<
150 for (std::size_t j=0; j<nelm; ++j) { <<
151 G4int Z = G4lrint((*theElementVector)[ <<
152 if(Z < 1) { Z = 1; } <<
153 else if(Z > maxZ){ Z = maxZ; } <<
154 <<
155 if( (!data[Z]) ) { ReadData(Z, path); <<
156 } <<
157 } <<
158 <<
159 // For Doppler broadening <<
160 if(!shellData) { <<
161 shellData = new G4ShellData(); <<
162 shellData->SetOccupancyData(); <<
163 G4String file = "/doppler/shell-doppler" <<
164 shellData->LoadData(file); <<
165 } <<
166 if(!profileData) { profileData = new G4Dop <<
167 <<
168 // Scattering Function <<
169 if(!scatterFunctionData) <<
170 { <<
171 <<
172 G4VDataSetAlgorithm* scatterInterpolation = <<
173 G4String scatterFile = "comp/ce-sf-"; <<
174 scatterFunctionData = new G4CompositeEMDataS <<
175 scatterFunctionData->LoadData(scatterFile); <<
176 } <<
177 <<
178 InitialiseElementSelectors(particle, cuts) <<
179 } <<
180 <<
181 if (verboseLevel > 2) { <<
182 G4cout << "Loaded cross section files" << <<
183 } 99 }
>> 100
>> 101 // Reading of data files - all materials are read
184 102
185 if( verboseLevel>1 ) { << 103 crossSectionHandler = new G4CrossSectionHandler;
186 G4cout << "G4LivermoreComptonModel is init << 104 crossSectionHandler->Clear();
187 << "Energy range: " << 105 G4String crossSectionFile = "comp/ce-cs-";
188 << LowEnergyLimit() / eV << " eV - " << 106 crossSectionHandler->LoadData(crossSectionFile);
189 << HighEnergyLimit() / GeV << " GeV" << 107
190 << G4endl; << 108 meanFreePathTable = 0;
>> 109 meanFreePathTable = crossSectionHandler->BuildMeanFreePathForMaterials();
>> 110
>> 111 G4VDataSetAlgorithm* scatterInterpolation = new G4LogLogInterpolation;
>> 112 G4String scatterFile = "comp/ce-sf-";
>> 113 scatterFunctionData = new G4CompositeEMDataSet(scatterInterpolation, 1., 1.);
>> 114 scatterFunctionData->LoadData(scatterFile);
>> 115
>> 116 // For Doppler broadening
>> 117 shellData.SetOccupancyData();
>> 118 G4String file = "/doppler/shell-doppler";
>> 119 shellData.LoadData(file);
>> 120
>> 121 if (verboseLevel > 2)
>> 122 G4cout << "Loaded cross section files for Livermore Polarized Compton model" << G4endl;
>> 123
>> 124 InitialiseElementSelectors(particle,cuts);
>> 125
>> 126 if( verboseLevel>0 ) {
>> 127 G4cout << "Livermore Polarized Compton model is initialized " << G4endl
>> 128 << "Energy range: "
>> 129 << LowEnergyLimit() / eV << " eV - "
>> 130 << HighEnergyLimit() / GeV << " GeV"
>> 131 << G4endl;
191 } 132 }
192 // <<
193 if(isInitialised) { return; } <<
194 133
>> 134 //
>> 135
>> 136 if(isInitialised) return;
195 fParticleChange = GetParticleChangeForGamma( 137 fParticleChange = GetParticleChangeForGamma();
196 fAtomDeexcitation = G4LossTableManager::Ins <<
197 isInitialised = true; 138 isInitialised = true;
198 } 139 }
199 140
200 <<
201 void G4LivermorePolarizedComptonModel::Initial <<
202 G4VEmModel* masterModel) <<
203 { <<
204 SetElementSelectors(masterModel->GetElementS <<
205 } <<
206 <<
207 //....oooOO0OOooo........oooOO0OOooo........oo <<
208 <<
209 void G4LivermorePolarizedComptonModel::ReadDat <<
210 { <<
211 if (verboseLevel > 1) <<
212 { <<
213 G4cout << "G4LivermorePolarizedComptonMo <<
214 << G4endl; <<
215 } <<
216 if(data[Z]) { return; } <<
217 const char* datadir = path; <<
218 if(!datadir) <<
219 { <<
220 datadir = G4FindDataDir("G4LEDATA"); <<
221 if(!datadir) <<
222 { <<
223 G4Exception("G4LivermorePolarizedComptonMo <<
224 "em0006",FatalException, <<
225 "Environment variable G4LEDATA not d <<
226 return; <<
227 } <<
228 } <<
229 <<
230 data[Z] = new G4PhysicsFreeVector(); <<
231 <<
232 std::ostringstream ost; <<
233 ost << datadir << "/livermore/comp/ce-cs-" < <<
234 std::ifstream fin(ost.str().c_str()); <<
235 <<
236 if( !fin.is_open()) <<
237 { <<
238 G4ExceptionDescription ed; <<
239 ed << "G4LivermorePolarizedComptonModel <<
240 << "> is not opened!" << G4endl; <<
241 G4Exception("G4LivermoreComptonModel::Re <<
242 "em0003",FatalException, <<
243 ed,"G4LEDATA version should be G4EMLOW8. <<
244 return; <<
245 } else { <<
246 if(verboseLevel > 3) { <<
247 G4cout << "File " << ost.str() <<
248 << " is opened by G4LivermorePolarizedC <<
249 } <<
250 data[Z]->Retrieve(fin, true); <<
251 data[Z]->ScaleVector(MeV, MeV*barn); <<
252 } <<
253 fin.close(); <<
254 } <<
255 <<
256 //....oooOO0OOooo........oooOO0OOooo........oo 141 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
257 142
258 G4double G4LivermorePolarizedComptonModel::Com 143 G4double G4LivermorePolarizedComptonModel::ComputeCrossSectionPerAtom(
259 const G 144 const G4ParticleDefinition*,
260 G 145 G4double GammaEnergy,
261 G 146 G4double Z, G4double,
262 G 147 G4double, G4double)
263 { 148 {
264 if (verboseLevel > 3) 149 if (verboseLevel > 3)
265 G4cout << "Calling ComputeCrossSectionPerA 150 G4cout << "Calling ComputeCrossSectionPerAtom() of G4LivermorePolarizedComptonModel" << G4endl;
266 151
267 G4double cs = 0.0; << 152 if (GammaEnergy < lowEnergyLimit || GammaEnergy > highEnergyLimit) return 0.0;
268 <<
269 if (GammaEnergy < LowEnergyLimit()) <<
270 return 0.0; <<
271 153
272 G4int intZ = G4lrint(Z); << 154 G4double cs = crossSectionHandler->FindValue(G4int(Z), GammaEnergy);
273 if(intZ < 1 || intZ > maxZ) { return cs; } <<
274 <<
275 G4PhysicsFreeVector* pv = data[intZ]; <<
276 <<
277 // if element was not initialised <<
278 // do initialisation safely for MT mode <<
279 if(!pv) <<
280 { <<
281 InitialiseForElement(0, intZ); <<
282 pv = data[intZ]; <<
283 if(!pv) { return cs; } <<
284 } <<
285 <<
286 G4int n = G4int(pv->GetVectorLength() - 1); <<
287 G4double e1 = pv->Energy(0); <<
288 G4double e2 = pv->Energy(n); <<
289 <<
290 if(GammaEnergy <= e1) { cs = GammaEnerg <<
291 else if(GammaEnergy <= e2) { cs = pv->Value( <<
292 else if(GammaEnergy > e2) { cs = pv->Value( <<
293 <<
294 return cs; 155 return cs;
295 <<
296 } 156 }
297 157
298 //....oooOO0OOooo........oooOO0OOooo........oo 158 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
299 159
300 void G4LivermorePolarizedComptonModel::SampleS 160 void G4LivermorePolarizedComptonModel::SampleSecondaries(std::vector<G4DynamicParticle*>* fvect,
301 const G4MaterialCutsCouple* co 161 const G4MaterialCutsCouple* couple,
302 const G4DynamicParticle* aDyna 162 const G4DynamicParticle* aDynamicGamma,
303 G4double, 163 G4double,
304 G4double) 164 G4double)
305 { 165 {
306 // The scattered gamma energy is sampled acc 166 // The scattered gamma energy is sampled according to Klein - Nishina formula.
307 // The random number techniques of Butcher & 167 // The random number techniques of Butcher & Messel are used (Nuc Phys 20(1960),15).
308 // GEANT4 internal units 168 // GEANT4 internal units
309 // 169 //
310 // Note : Effects due to binding of atomic e 170 // Note : Effects due to binding of atomic electrons are negliged.
311 171
312 if (verboseLevel > 3) 172 if (verboseLevel > 3)
313 G4cout << "Calling SampleSecondaries() of 173 G4cout << "Calling SampleSecondaries() of G4LivermorePolarizedComptonModel" << G4endl;
314 174
315 G4double gammaEnergy0 = aDynamicGamma->GetKi 175 G4double gammaEnergy0 = aDynamicGamma->GetKineticEnergy();
316 <<
317 // do nothing below the threshold <<
318 // should never get here because the XS is z <<
319 if (gammaEnergy0 < LowEnergyLimit()) <<
320 return ; <<
321 <<
322 G4ThreeVector gammaPolarization0 = aDynamicG 176 G4ThreeVector gammaPolarization0 = aDynamicGamma->GetPolarization();
323 177
324 // Protection: a polarisation parallel to th 178 // Protection: a polarisation parallel to the
325 // direction causes problems; 179 // direction causes problems;
326 // in that case find a random polarization 180 // in that case find a random polarization
>> 181
327 G4ThreeVector gammaDirection0 = aDynamicGamm 182 G4ThreeVector gammaDirection0 = aDynamicGamma->GetMomentumDirection();
328 183
329 // Make sure that the polarization vector is 184 // Make sure that the polarization vector is perpendicular to the
330 // gamma direction. If not 185 // gamma direction. If not
>> 186
331 if(!(gammaPolarization0.isOrthogonal(gammaDi 187 if(!(gammaPolarization0.isOrthogonal(gammaDirection0, 1e-6))||(gammaPolarization0.mag()==0))
332 { // only for testing now 188 { // only for testing now
333 gammaPolarization0 = GetRandomPolarizati 189 gammaPolarization0 = GetRandomPolarization(gammaDirection0);
334 } 190 }
335 else 191 else
336 { 192 {
337 if ( gammaPolarization0.howOrthogonal(ga 193 if ( gammaPolarization0.howOrthogonal(gammaDirection0) != 0)
338 { 194 {
339 gammaPolarization0 = GetPerpendicularPolar 195 gammaPolarization0 = GetPerpendicularPolarization(gammaDirection0, gammaPolarization0);
340 } 196 }
341 } 197 }
>> 198
342 // End of Protection 199 // End of Protection
343 200
>> 201 // Within energy limit?
>> 202
>> 203 if(gammaEnergy0 <= lowEnergyLimit)
>> 204 {
>> 205 fParticleChange->ProposeTrackStatus(fStopAndKill);
>> 206 fParticleChange->SetProposedKineticEnergy(0.);
>> 207 fParticleChange->ProposeLocalEnergyDeposit(gammaEnergy0);
>> 208 return;
>> 209 }
>> 210
344 G4double E0_m = gammaEnergy0 / electron_mass 211 G4double E0_m = gammaEnergy0 / electron_mass_c2 ;
345 212
346 // Select randomly one element in the curren 213 // Select randomly one element in the current material
347 //G4int Z = crossSectionHandler->SelectRando 214 //G4int Z = crossSectionHandler->SelectRandomAtom(couple,gammaEnergy0);
348 const G4ParticleDefinition* particle = aDyn 215 const G4ParticleDefinition* particle = aDynamicGamma->GetDefinition();
349 const G4Element* elm = SelectRandomAtom(coup 216 const G4Element* elm = SelectRandomAtom(couple,particle,gammaEnergy0);
350 G4int Z = (G4int)elm->GetZ(); 217 G4int Z = (G4int)elm->GetZ();
351 218
352 // Sample the energy and the polarization of 219 // Sample the energy and the polarization of the scattered photon
>> 220
353 G4double epsilon, epsilonSq, onecost, sinThe 221 G4double epsilon, epsilonSq, onecost, sinThetaSqr, greject ;
354 222
355 G4double epsilon0Local = 1./(1. + 2*E0_m); 223 G4double epsilon0Local = 1./(1. + 2*E0_m);
356 G4double epsilon0Sq = epsilon0Local*epsilon0 224 G4double epsilon0Sq = epsilon0Local*epsilon0Local;
357 G4double alpha1 = - G4Log(epsilon0Local); << 225 G4double alpha1 = - std::log(epsilon0Local);
358 G4double alpha2 = 0.5*(1.- epsilon0Sq); 226 G4double alpha2 = 0.5*(1.- epsilon0Sq);
359 227
360 G4double wlGamma = h_Planck*c_light/gammaEne 228 G4double wlGamma = h_Planck*c_light/gammaEnergy0;
361 G4double gammaEnergy1; 229 G4double gammaEnergy1;
362 G4ThreeVector gammaDirection1; 230 G4ThreeVector gammaDirection1;
363 231
364 do { 232 do {
365 if ( alpha1/(alpha1+alpha2) > G4UniformRan 233 if ( alpha1/(alpha1+alpha2) > G4UniformRand() )
366 { 234 {
367 epsilon = G4Exp(-alpha1*G4UniformRand()); << 235 epsilon = std::exp(-alpha1*G4UniformRand());
368 epsilonSq = epsilon*epsilon; 236 epsilonSq = epsilon*epsilon;
369 } 237 }
370 else 238 else
371 { 239 {
372 epsilonSq = epsilon0Sq + (1.- epsilon0Sq)*G4 240 epsilonSq = epsilon0Sq + (1.- epsilon0Sq)*G4UniformRand();
373 epsilon = std::sqrt(epsilonSq); 241 epsilon = std::sqrt(epsilonSq);
374 } 242 }
375 243
376 onecost = (1.- epsilon)/(epsilon*E0_m); 244 onecost = (1.- epsilon)/(epsilon*E0_m);
377 sinThetaSqr = onecost*(2.-onecost); 245 sinThetaSqr = onecost*(2.-onecost);
378 246
379 // Protection 247 // Protection
380 if (sinThetaSqr > 1.) 248 if (sinThetaSqr > 1.)
381 { 249 {
382 G4cout 250 G4cout
383 << " -- Warning -- G4LivermorePolarizedCom 251 << " -- Warning -- G4LivermorePolarizedComptonModel::SampleSecondaries "
384 << "sin(theta)**2 = " 252 << "sin(theta)**2 = "
385 << sinThetaSqr 253 << sinThetaSqr
386 << "; set to 1" 254 << "; set to 1"
387 << G4endl; 255 << G4endl;
388 sinThetaSqr = 1.; 256 sinThetaSqr = 1.;
389 } 257 }
390 if (sinThetaSqr < 0.) 258 if (sinThetaSqr < 0.)
391 { 259 {
392 G4cout 260 G4cout
393 << " -- Warning -- G4LivermorePolarizedCom 261 << " -- Warning -- G4LivermorePolarizedComptonModel::SampleSecondaries "
394 << "sin(theta)**2 = " 262 << "sin(theta)**2 = "
395 << sinThetaSqr 263 << sinThetaSqr
396 << "; set to 0" 264 << "; set to 0"
397 << G4endl; 265 << G4endl;
398 sinThetaSqr = 0.; 266 sinThetaSqr = 0.;
399 } 267 }
400 // End protection 268 // End protection
401 269
402 G4double x = std::sqrt(onecost/2.) / (wlG 270 G4double x = std::sqrt(onecost/2.) / (wlGamma/cm);;
403 G4double scatteringFunction = scatterFunct 271 G4double scatteringFunction = scatterFunctionData->FindValue(x,Z-1);
404 greject = (1. - epsilon*sinThetaSqr/(1.+ e 272 greject = (1. - epsilon*sinThetaSqr/(1.+ epsilonSq))*scatteringFunction;
405 273
406 } while(greject < G4UniformRand()*Z); 274 } while(greject < G4UniformRand()*Z);
407 275
408 276
409 // ***************************************** 277 // ****************************************************
410 // Phi determination 278 // Phi determination
411 // ***************************************** 279 // ****************************************************
>> 280
412 G4double phi = SetPhi(epsilon,sinThetaSqr); 281 G4double phi = SetPhi(epsilon,sinThetaSqr);
413 282
414 // 283 //
415 // scattered gamma angles. ( Z - axis along 284 // scattered gamma angles. ( Z - axis along the parent gamma)
416 // 285 //
>> 286
417 G4double cosTheta = 1. - onecost; 287 G4double cosTheta = 1. - onecost;
418 288
419 // Protection 289 // Protection
>> 290
420 if (cosTheta > 1.) 291 if (cosTheta > 1.)
421 { 292 {
422 G4cout 293 G4cout
423 << " -- Warning -- G4LivermorePolarizedCompt 294 << " -- Warning -- G4LivermorePolarizedComptonModel::SampleSecondaries "
424 << "cosTheta = " 295 << "cosTheta = "
425 << cosTheta 296 << cosTheta
426 << "; set to 1" 297 << "; set to 1"
427 << G4endl; 298 << G4endl;
428 cosTheta = 1.; 299 cosTheta = 1.;
429 } 300 }
430 if (cosTheta < -1.) 301 if (cosTheta < -1.)
431 { 302 {
432 G4cout 303 G4cout
433 << " -- Warning -- G4LivermorePolarizedCompt 304 << " -- Warning -- G4LivermorePolarizedComptonModel::SampleSecondaries "
434 << "cosTheta = " 305 << "cosTheta = "
435 << cosTheta 306 << cosTheta
436 << "; set to -1" 307 << "; set to -1"
437 << G4endl; 308 << G4endl;
438 cosTheta = -1.; 309 cosTheta = -1.;
439 } 310 }
440 // End protection 311 // End protection
441 << 312
>> 313
442 G4double sinTheta = std::sqrt (sinThetaSqr); 314 G4double sinTheta = std::sqrt (sinThetaSqr);
443 315
444 // Protection 316 // Protection
445 if (sinTheta > 1.) 317 if (sinTheta > 1.)
446 { 318 {
447 G4cout 319 G4cout
448 << " -- Warning -- G4LivermorePolarizedCompt 320 << " -- Warning -- G4LivermorePolarizedComptonModel::SampleSecondaries "
449 << "sinTheta = " 321 << "sinTheta = "
450 << sinTheta 322 << sinTheta
451 << "; set to 1" 323 << "; set to 1"
452 << G4endl; 324 << G4endl;
453 sinTheta = 1.; 325 sinTheta = 1.;
454 } 326 }
455 if (sinTheta < -1.) 327 if (sinTheta < -1.)
456 { 328 {
457 G4cout 329 G4cout
458 << " -- Warning -- G4LivermorePolarizedCompt 330 << " -- Warning -- G4LivermorePolarizedComptonModel::SampleSecondaries "
459 << "sinTheta = " 331 << "sinTheta = "
460 << sinTheta 332 << sinTheta
461 << "; set to -1" 333 << "; set to -1"
462 << G4endl; 334 << G4endl;
463 sinTheta = -1.; 335 sinTheta = -1.;
464 } 336 }
465 // End protection 337 // End protection
466 338
467 // Check for entanglement and re-sample phi <<
468 <<
469 const auto* auxInfo <<
470 = fParticleChange->GetCurrentTrack()->GetAux <<
471 if (auxInfo) { <<
472 const auto* entanglementAuxInfo = dynamic_ <<
473 if (entanglementAuxInfo) { <<
474 auto* clipBoard = dynamic_cast<G4eplusAn <<
475 (entanglementAuxInfo->GetEntanglementCli <<
476 if (clipBoard) { <<
477 // This is an entangled photon from ep <<
478 // If this is the first scatter of the <<
479 // phi on the clipboard. <<
480 // If this is the first scatter of the <<
481 // phi of the first scatter of the fir <<
482 // theta of the second photon, to samp <<
483 if (clipBoard->IsTrack1Measurement()) <<
484 // Check we have the relevant track. <<
485 // necessary but I want to be sure t <<
486 // entangled system are properly pai <<
487 // Note: the tracking manager pops t <<
488 // will rely on that. (If not, the <<
489 // more complicated to ensure we mat <<
490 // So our track 1 is clipboard track <<
491 if (clipBoard->GetTrackB() == fParti <<
492 // This is the first scatter of th <<
493 // // Debug <<
494 // auto* track1 = fPart <<
495 // G4cout <<
496 // << "This is the firs <<
497 // << "\nTrack: " << tr <<
498 // << ", Parent: " << t <<
499 // << ", Name: " << cli <<
500 // << G4endl; <<
501 // // End debug <<
502 clipBoard->ResetTrack1Measurement( <<
503 // Store cos(theta),phi of first p <<
504 clipBoard->SetComptonCosTheta1(cos <<
505 clipBoard->SetComptonPhi1(phi); <<
506 } <<
507 } else if (clipBoard->IsTrack2Measurem <<
508 // Check we have the relevant track. <<
509 // Remember our track 2 is clipboard <<
510 if (clipBoard->GetTrackA() == fParti <<
511 // This is the first scatter of th <<
512 // // Debug <<
513 // auto* track2 = fPart <<
514 // G4cout <<
515 // << "This is the firs <<
516 // << "\nTrack: " << tr <<
517 // << ", Parent: " << t <<
518 // << ", Name: " << cli <<
519 // << G4endl; <<
520 // // End debug <<
521 clipBoard->ResetTrack2Measurement( <<
522 <<
523 // Get cos(theta),phi of first pho <<
524 const G4double& cosTheta1 = clipBo <<
525 const G4double& phi1 = clipBoard-> <<
526 // For clarity make aliases for th <<
527 const G4double& cosTheta2 = cosThe <<
528 G4double& phi2 = phi; <<
529 // G4cout << "cosTheta1 <<
530 // G4cout << "cosTheta2 <<
531 <<
532 // Re-sample phi <<
533 // Draw the difference of azimutha <<
534 // A + B * cos(2*deltaPhi), or rat <<
535 // C = A / (A + |B|) and D = B / ( <<
536 const G4double sin2Theta1 = 1.-cos <<
537 const G4double sin2Theta2 = 1.-cos <<
538 <<
539 // Pryce and Ward, Nature No 4065 <<
540 auto* g4Pow = G4Pow::GetInstance() <<
541 const G4double A = <<
542 ((g4Pow->powN(1.-cosTheta1,3))+2.) <<
543 ((g4Pow->powN(2.-cosTheta1,3)*g4Po <<
544 const G4double B = -(sin2Theta1*si <<
545 ((g4Pow->powN(2.-cosTheta1,2)*g4Po <<
546 <<
547 // // Snyder et al, Physical Re <<
548 // // (This is an alternative f <<
549 // const G4double& k0 = gammaEn <<
550 // const G4double k1 = k0/(2.-c <<
551 // const G4double k2 = k0/(2.-c <<
552 // const G4double gamma1 = k1/k <<
553 // const G4double gamma2 = k2/k <<
554 // const G4double A1 = gamma1*g <<
555 // const G4double B1 = 2.*sin2T <<
556 // // That's A1 + B1*sin2(delta <<
557 // const G4double A = A1 + 0.5* <<
558 // const G4double B = -0.5*B1; <<
559 <<
560 const G4double maxValue = A + std: <<
561 const G4double C = A / maxValue; <<
562 const G4double D = B / maxValue; <<
563 // G4cout << "A,B,C,D: " << A < <<
564 <<
565 // Sample delta phi <<
566 G4double deltaPhi; <<
567 const G4int maxCount = 999999; <<
568 G4int iCount = 0; <<
569 for (; iCount < maxCount; ++iCount <<
570 deltaPhi = twopi * G4UniformRand <<
571 if (G4UniformRand() < C + D * co <<
572 } <<
573 if (iCount >= maxCount ) { <<
574 G4cout << "G4LivermorePolarizedC <<
575 << "Re-sampled delta phi not fou <<
576 << " tries - carrying on anyway. <<
577 } <<
578 <<
579 // Thus, the desired second photon <<
580 phi2 = deltaPhi - phi1 + halfpi; <<
581 // The minus sign is in above stat <<
582 // annihilation photons are in opp <<
583 // are measured in the opposite di <<
584 // halfpi is added for the followi <<
585 // In this function phi is relativ <<
586 // SystemOfRefChange below. We kno <<
587 // the polarisations of the two an <<
588 // to each other, i.e., halfpi dif <<
589 // Furthermore, only sin(phi) and <<
590 // need to place any range constra <<
591 // if (phi2 > pi) { <<
592 // phi2 -= twopi; <<
593 // } <<
594 // if (phi2 < -pi) { <<
595 // phi2 += twopi; <<
596 // } <<
597 } <<
598 } <<
599 } <<
600 } <<
601 } <<
602 <<
603 // End of entanglement <<
604 339
605 G4double dirx = sinTheta*std::cos(phi); 340 G4double dirx = sinTheta*std::cos(phi);
606 G4double diry = sinTheta*std::sin(phi); 341 G4double diry = sinTheta*std::sin(phi);
607 G4double dirz = cosTheta ; 342 G4double dirz = cosTheta ;
608 << 343
>> 344
609 // oneCosT , eom 345 // oneCosT , eom
610 346
611 // Doppler broadening - Method based on: 347 // Doppler broadening - Method based on:
612 // Y. Namito, S. Ban and H. Hirayama, 348 // Y. Namito, S. Ban and H. Hirayama,
613 // "Implementation of the Doppler Broadening 349 // "Implementation of the Doppler Broadening of a Compton-Scattered Photon Into the EGS4 Code"
614 // NIM A 349, pp. 489-494, 1994 350 // NIM A 349, pp. 489-494, 1994
615 351
616 // Maximum number of sampling iterations 352 // Maximum number of sampling iterations
617 static G4int maxDopplerIterations = 1000; << 353
>> 354 G4int maxDopplerIterations = 1000;
618 G4double bindingE = 0.; 355 G4double bindingE = 0.;
619 G4double photonEoriginal = epsilon * gammaEn 356 G4double photonEoriginal = epsilon * gammaEnergy0;
620 G4double photonE = -1.; 357 G4double photonE = -1.;
621 G4int iteration = 0; 358 G4int iteration = 0;
622 G4double eMax = gammaEnergy0; 359 G4double eMax = gammaEnergy0;
623 360
624 G4int shellIdx = 0; <<
625 <<
626 if (verboseLevel > 3) { <<
627 G4cout << "Started loop to sample broading <<
628 } <<
629 <<
630 do 361 do
631 { 362 {
632 iteration++; 363 iteration++;
633 // Select shell based on shell occupancy 364 // Select shell based on shell occupancy
634 shellIdx = shellData->SelectRandomShell( << 365 G4int shell = shellData.SelectRandomShell(Z);
635 bindingE = shellData->BindingEnergy(Z,sh << 366 bindingE = shellData.BindingEnergy(Z,shell);
636 367
637 if (verboseLevel > 3) { <<
638 G4cout << "Shell ID= " << shellIdx <<
639 << " Ebind(keV)= " << bindingE/keV << <<
640 } <<
641 eMax = gammaEnergy0 - bindingE; 368 eMax = gammaEnergy0 - bindingE;
642 << 369
643 // Randomly sample bound electron moment 370 // Randomly sample bound electron momentum (memento: the data set is in Atomic Units)
644 G4double pSample = profileData->RandomSe << 371 G4double pSample = profileData.RandomSelectMomentum(Z,shell);
645 <<
646 if (verboseLevel > 3) { <<
647 G4cout << "pSample= " << pSample << G4e <<
648 } <<
649 // Rescale from atomic units 372 // Rescale from atomic units
650 G4double pDoppler = pSample * fine_struc 373 G4double pDoppler = pSample * fine_structure_const;
651 G4double pDoppler2 = pDoppler * pDoppler 374 G4double pDoppler2 = pDoppler * pDoppler;
652 G4double var2 = 1. + onecost * E0_m; 375 G4double var2 = 1. + onecost * E0_m;
653 G4double var3 = var2*var2 - pDoppler2; 376 G4double var3 = var2*var2 - pDoppler2;
654 G4double var4 = var2 - pDoppler2 * cosTh 377 G4double var4 = var2 - pDoppler2 * cosTheta;
655 G4double var = var4*var4 - var3 + pDoppl 378 G4double var = var4*var4 - var3 + pDoppler2 * var3;
656 if (var > 0.) 379 if (var > 0.)
657 { 380 {
658 G4double varSqrt = std::sqrt(var); 381 G4double varSqrt = std::sqrt(var);
659 G4double scale = gammaEnergy0 / var3; 382 G4double scale = gammaEnergy0 / var3;
660 // Random select either root 383 // Random select either root
661 if (G4UniformRand() < 0.5) photonE = (var4 384 if (G4UniformRand() < 0.5) photonE = (var4 - varSqrt) * scale;
662 else photonE = (var4 + varSqrt) * scale; 385 else photonE = (var4 + varSqrt) * scale;
663 } 386 }
664 else 387 else
665 { 388 {
666 photonE = -1.; 389 photonE = -1.;
667 } 390 }
668 } while ( iteration <= maxDopplerIterations 391 } while ( iteration <= maxDopplerIterations &&
669 (photonE < 0. || photonE > eMax || phot 392 (photonE < 0. || photonE > eMax || photonE < eMax*G4UniformRand()) );
670 << 393
671 // End of recalculation of photon energy wit 394 // End of recalculation of photon energy with Doppler broadening
672 // Revert to original if maximum number of i 395 // Revert to original if maximum number of iterations threshold has been reached
673 if (iteration >= maxDopplerIterations) 396 if (iteration >= maxDopplerIterations)
674 { 397 {
675 photonE = photonEoriginal; 398 photonE = photonEoriginal;
676 bindingE = 0.; 399 bindingE = 0.;
677 } 400 }
678 401
679 gammaEnergy1 = photonE; 402 gammaEnergy1 = photonE;
680 403
681 // 404 //
682 // update G4VParticleChange for the scattere 405 // update G4VParticleChange for the scattered photon
683 // 406 //
>> 407
>> 408 // gammaEnergy1 = epsilon*gammaEnergy0;
>> 409
>> 410
684 // New polarization 411 // New polarization
>> 412
685 G4ThreeVector gammaPolarization1 = SetNewPol 413 G4ThreeVector gammaPolarization1 = SetNewPolarization(epsilon,
686 sinThetaSqr, 414 sinThetaSqr,
687 phi, 415 phi,
688 cosTheta); 416 cosTheta);
689 417
690 // Set new direction 418 // Set new direction
691 G4ThreeVector tmpDirection1( dirx,diry,dirz 419 G4ThreeVector tmpDirection1( dirx,diry,dirz );
692 gammaDirection1 = tmpDirection1; 420 gammaDirection1 = tmpDirection1;
693 421
694 // Change reference frame. 422 // Change reference frame.
>> 423
695 SystemOfRefChange(gammaDirection0,gammaDirec 424 SystemOfRefChange(gammaDirection0,gammaDirection1,
696 gammaPolarization0,gammaPolarization1) 425 gammaPolarization0,gammaPolarization1);
697 426
698 if (gammaEnergy1 > 0.) 427 if (gammaEnergy1 > 0.)
699 { 428 {
700 fParticleChange->SetProposedKineticEnerg 429 fParticleChange->SetProposedKineticEnergy( gammaEnergy1 ) ;
701 fParticleChange->ProposeMomentumDirectio 430 fParticleChange->ProposeMomentumDirection( gammaDirection1 );
702 fParticleChange->ProposePolarization( ga 431 fParticleChange->ProposePolarization( gammaPolarization1 );
703 } 432 }
704 else 433 else
705 { 434 {
706 gammaEnergy1 = 0.; 435 gammaEnergy1 = 0.;
707 fParticleChange->SetProposedKineticEnerg 436 fParticleChange->SetProposedKineticEnergy(0.) ;
708 fParticleChange->ProposeTrackStatus(fSto 437 fParticleChange->ProposeTrackStatus(fStopAndKill);
709 } 438 }
710 439
711 // 440 //
712 // kinematic of the scattered electron 441 // kinematic of the scattered electron
713 // 442 //
>> 443
714 G4double ElecKineEnergy = gammaEnergy0 - gam 444 G4double ElecKineEnergy = gammaEnergy0 - gammaEnergy1 -bindingE;
715 445
716 // SI -protection against negative final ene 446 // SI -protection against negative final energy: no e- is created
717 // like in G4LivermoreComptonModel.cc 447 // like in G4LivermoreComptonModel.cc
718 if(ElecKineEnergy < 0.0) { 448 if(ElecKineEnergy < 0.0) {
719 fParticleChange->ProposeLocalEnergyDeposit 449 fParticleChange->ProposeLocalEnergyDeposit(gammaEnergy0 - gammaEnergy1);
720 return; 450 return;
721 } 451 }
722 452
>> 453 // SI - Removed range test
>> 454
723 G4double ElecMomentum = std::sqrt(ElecKineEn 455 G4double ElecMomentum = std::sqrt(ElecKineEnergy*(ElecKineEnergy+2.*electron_mass_c2));
724 456
725 G4ThreeVector ElecDirection((gammaEnergy0 * 457 G4ThreeVector ElecDirection((gammaEnergy0 * gammaDirection0 -
726 gammaEnergy1 * gammaDirection1) * ( 458 gammaEnergy1 * gammaDirection1) * (1./ElecMomentum));
727 459
728 G4DynamicParticle* dp = <<
729 new G4DynamicParticle (G4Electron::Electro <<
730 fvect->push_back(dp); <<
731 <<
732 // sample deexcitation <<
733 // <<
734 if (verboseLevel > 3) { <<
735 G4cout << "Started atomic de-excitation " <<
736 } <<
737 <<
738 if(fAtomDeexcitation && iteration < maxDoppl <<
739 G4int index = couple->GetIndex(); <<
740 if(fAtomDeexcitation->CheckDeexcitationAct <<
741 std::size_t nbefore = fvect->size(); <<
742 G4AtomicShellEnumerator as = G4AtomicShe <<
743 const G4AtomicShell* shell = fAtomDeexci <<
744 fAtomDeexcitation->GenerateParticles(fve <<
745 std::size_t nafter = fvect->size(); <<
746 if(nafter > nbefore) { <<
747 for (std::size_t i=nbefore; i<nafter; ++i) { <<
748 //Check if there is enough residual energy <<
749 if (bindingE >= ((*fvect)[i])->GetKineticE <<
750 { <<
751 //Ok, this is a valid secondary: <<
752 bindingE -= ((*fvect)[i])->GetKineticE <<
753 } <<
754 else <<
755 { <<
756 //Invalid secondary: not enough energy <<
757 //Keep its energy in the local deposit <<
758 delete (*fvect)[i]; <<
759 (*fvect)[i]=0; <<
760 } <<
761 } <<
762 } <<
763 } <<
764 } <<
765 //This should never happen <<
766 if(bindingE < 0.0) <<
767 G4Exception("G4LivermoreComptonModel::Samp <<
768 "em2050",FatalException,"Negative local en <<
769 <<
770 fParticleChange->ProposeLocalEnergyDeposit(b 460 fParticleChange->ProposeLocalEnergyDeposit(bindingE);
>> 461
>> 462 G4DynamicParticle* dp = new G4DynamicParticle (G4Electron::Electron(),ElecDirection.unit(),ElecKineEnergy) ;
>> 463 fvect->push_back(dp);
771 464
772 } 465 }
773 466
774 //....oooOO0OOooo........oooOO0OOooo........oo 467 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
775 468
776 G4double G4LivermorePolarizedComptonModel::Set 469 G4double G4LivermorePolarizedComptonModel::SetPhi(G4double energyRate,
777 G4double sinSqrTh) 470 G4double sinSqrTh)
778 { 471 {
779 G4double rand1; 472 G4double rand1;
780 G4double rand2; 473 G4double rand2;
781 G4double phiProbability; 474 G4double phiProbability;
782 G4double phi; 475 G4double phi;
783 G4double a, b; 476 G4double a, b;
784 477
785 do 478 do
786 { 479 {
787 rand1 = G4UniformRand(); 480 rand1 = G4UniformRand();
788 rand2 = G4UniformRand(); 481 rand2 = G4UniformRand();
789 phiProbability=0.; 482 phiProbability=0.;
790 phi = twopi*rand1; 483 phi = twopi*rand1;
791 484
792 a = 2*sinSqrTh; 485 a = 2*sinSqrTh;
793 b = energyRate + 1/energyRate; 486 b = energyRate + 1/energyRate;
794 487
795 phiProbability = 1 - (a/b)*(std::cos(phi 488 phiProbability = 1 - (a/b)*(std::cos(phi)*std::cos(phi));
>> 489
>> 490
>> 491
796 } 492 }
797 while ( rand2 > phiProbability ); 493 while ( rand2 > phiProbability );
798 return phi; 494 return phi;
799 } 495 }
800 496
801 497
802 //....oooOO0OOooo........oooOO0OOooo........oo 498 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
803 499
804 G4ThreeVector G4LivermorePolarizedComptonModel 500 G4ThreeVector G4LivermorePolarizedComptonModel::SetPerpendicularVector(G4ThreeVector& a)
805 { 501 {
806 G4double dx = a.x(); 502 G4double dx = a.x();
807 G4double dy = a.y(); 503 G4double dy = a.y();
808 G4double dz = a.z(); 504 G4double dz = a.z();
809 G4double x = dx < 0.0 ? -dx : dx; 505 G4double x = dx < 0.0 ? -dx : dx;
810 G4double y = dy < 0.0 ? -dy : dy; 506 G4double y = dy < 0.0 ? -dy : dy;
811 G4double z = dz < 0.0 ? -dz : dz; 507 G4double z = dz < 0.0 ? -dz : dz;
812 if (x < y) { 508 if (x < y) {
813 return x < z ? G4ThreeVector(-dy,dx,0) : G 509 return x < z ? G4ThreeVector(-dy,dx,0) : G4ThreeVector(0,-dz,dy);
814 }else{ 510 }else{
815 return y < z ? G4ThreeVector(dz,0,-dx) : G 511 return y < z ? G4ThreeVector(dz,0,-dx) : G4ThreeVector(-dy,dx,0);
816 } 512 }
817 } 513 }
818 514
819 //....oooOO0OOooo........oooOO0OOooo........oo 515 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
820 516
821 G4ThreeVector G4LivermorePolarizedComptonModel 517 G4ThreeVector G4LivermorePolarizedComptonModel::GetRandomPolarization(G4ThreeVector& direction0)
822 { 518 {
823 G4ThreeVector d0 = direction0.unit(); 519 G4ThreeVector d0 = direction0.unit();
824 G4ThreeVector a1 = SetPerpendicularVector(d0 520 G4ThreeVector a1 = SetPerpendicularVector(d0); //different orthogonal
825 G4ThreeVector a0 = a1.unit(); // unit vector 521 G4ThreeVector a0 = a1.unit(); // unit vector
826 522
827 G4double rand1 = G4UniformRand(); 523 G4double rand1 = G4UniformRand();
828 524
829 G4double angle = twopi*rand1; // random pola 525 G4double angle = twopi*rand1; // random polar angle
830 G4ThreeVector b0 = d0.cross(a0); // cross pr 526 G4ThreeVector b0 = d0.cross(a0); // cross product
831 527
832 G4ThreeVector c; 528 G4ThreeVector c;
833 529
834 c.setX(std::cos(angle)*(a0.x())+std::sin(ang 530 c.setX(std::cos(angle)*(a0.x())+std::sin(angle)*b0.x());
835 c.setY(std::cos(angle)*(a0.y())+std::sin(ang 531 c.setY(std::cos(angle)*(a0.y())+std::sin(angle)*b0.y());
836 c.setZ(std::cos(angle)*(a0.z())+std::sin(ang 532 c.setZ(std::cos(angle)*(a0.z())+std::sin(angle)*b0.z());
837 533
838 G4ThreeVector c0 = c.unit(); 534 G4ThreeVector c0 = c.unit();
839 535
840 return c0; 536 return c0;
>> 537
841 } 538 }
842 539
843 //....oooOO0OOooo........oooOO0OOooo........oo 540 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
844 541
845 G4ThreeVector G4LivermorePolarizedComptonModel 542 G4ThreeVector G4LivermorePolarizedComptonModel::GetPerpendicularPolarization
846 (const G4ThreeVector& gammaDirection, const G4 543 (const G4ThreeVector& gammaDirection, const G4ThreeVector& gammaPolarization) const
847 { 544 {
>> 545
848 // 546 //
849 // The polarization of a photon is always pe 547 // The polarization of a photon is always perpendicular to its momentum direction.
850 // Therefore this function removes those vec 548 // Therefore this function removes those vector component of gammaPolarization, which
851 // points in direction of gammaDirection 549 // points in direction of gammaDirection
852 // 550 //
853 // Mathematically we search the projection o 551 // Mathematically we search the projection of the vector a on the plane E, where n is the
854 // plains normal vector. 552 // plains normal vector.
855 // The basic equation can be found in each g 553 // The basic equation can be found in each geometry book (e.g. Bronstein):
856 // p = a - (a o n)/(n o n)*n 554 // p = a - (a o n)/(n o n)*n
857 555
858 return gammaPolarization - gammaPolarization 556 return gammaPolarization - gammaPolarization.dot(gammaDirection)/gammaDirection.dot(gammaDirection) * gammaDirection;
859 } 557 }
860 558
861 //....oooOO0OOooo........oooOO0OOooo........oo 559 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
862 560
863 G4ThreeVector G4LivermorePolarizedComptonModel 561 G4ThreeVector G4LivermorePolarizedComptonModel::SetNewPolarization(G4double epsilon,
864 G4double sinSqrTh, 562 G4double sinSqrTh,
865 G4double phi, 563 G4double phi,
866 G4double costheta) 564 G4double costheta)
867 { 565 {
868 G4double rand1; 566 G4double rand1;
869 G4double rand2; 567 G4double rand2;
870 G4double cosPhi = std::cos(phi); 568 G4double cosPhi = std::cos(phi);
871 G4double sinPhi = std::sin(phi); 569 G4double sinPhi = std::sin(phi);
872 G4double sinTheta = std::sqrt(sinSqrTh); 570 G4double sinTheta = std::sqrt(sinSqrTh);
873 G4double cosSqrPhi = cosPhi*cosPhi; 571 G4double cosSqrPhi = cosPhi*cosPhi;
874 // G4double cossqrth = 1.-sinSqrTh; 572 // G4double cossqrth = 1.-sinSqrTh;
875 // G4double sinsqrphi = sinPhi*sinPhi; 573 // G4double sinsqrphi = sinPhi*sinPhi;
876 G4double normalisation = std::sqrt(1. - cosS 574 G4double normalisation = std::sqrt(1. - cosSqrPhi*sinSqrTh);
877 575
>> 576
878 // Determination of Theta 577 // Determination of Theta
>> 578
>> 579 // ---- MGP ---- Commented out the following 3 lines to avoid compilation
>> 580 // warnings (unused variables)
>> 581 // G4double thetaProbability;
879 G4double theta; 582 G4double theta;
>> 583 // G4double a, b;
>> 584 // G4double cosTheta;
>> 585
>> 586 /*
>> 587
>> 588 depaola method
>> 589
>> 590 do
>> 591 {
>> 592 rand1 = G4UniformRand();
>> 593 rand2 = G4UniformRand();
>> 594 thetaProbability=0.;
>> 595 theta = twopi*rand1;
>> 596 a = 4*normalisation*normalisation;
>> 597 b = (epsilon + 1/epsilon) - 2;
>> 598 thetaProbability = (b + a*std::cos(theta)*std::cos(theta))/(a+b);
>> 599 cosTheta = std::cos(theta);
>> 600 }
>> 601 while ( rand2 > thetaProbability );
>> 602
>> 603 G4double cosBeta = cosTheta;
>> 604
>> 605 */
>> 606
880 607
881 // Dan Xu method (IEEE TNS, 52, 1160 (2005)) 608 // Dan Xu method (IEEE TNS, 52, 1160 (2005))
>> 609
882 rand1 = G4UniformRand(); 610 rand1 = G4UniformRand();
883 rand2 = G4UniformRand(); 611 rand2 = G4UniformRand();
884 612
885 if (rand1<(epsilon+1.0/epsilon-2)/(2.0*(epsi 613 if (rand1<(epsilon+1.0/epsilon-2)/(2.0*(epsilon+1.0/epsilon)-4.0*sinSqrTh*cosSqrPhi))
886 { 614 {
887 if (rand2<0.5) 615 if (rand2<0.5)
888 theta = pi/2.0; 616 theta = pi/2.0;
889 else 617 else
890 theta = 3.0*pi/2.0; 618 theta = 3.0*pi/2.0;
891 } 619 }
892 else 620 else
893 { 621 {
894 if (rand2<0.5) 622 if (rand2<0.5)
895 theta = 0; 623 theta = 0;
896 else 624 else
897 theta = pi; 625 theta = pi;
898 } 626 }
899 G4double cosBeta = std::cos(theta); 627 G4double cosBeta = std::cos(theta);
900 G4double sinBeta = std::sqrt(1-cosBeta*cosBe 628 G4double sinBeta = std::sqrt(1-cosBeta*cosBeta);
901 629
902 G4ThreeVector gammaPolarization1; 630 G4ThreeVector gammaPolarization1;
903 631
904 G4double xParallel = normalisation*cosBeta; 632 G4double xParallel = normalisation*cosBeta;
905 G4double yParallel = -(sinSqrTh*cosPhi*sinPh 633 G4double yParallel = -(sinSqrTh*cosPhi*sinPhi)*cosBeta/normalisation;
906 G4double zParallel = -(costheta*sinTheta*cos 634 G4double zParallel = -(costheta*sinTheta*cosPhi)*cosBeta/normalisation;
907 G4double xPerpendicular = 0.; 635 G4double xPerpendicular = 0.;
908 G4double yPerpendicular = (costheta)*sinBeta 636 G4double yPerpendicular = (costheta)*sinBeta/normalisation;
909 G4double zPerpendicular = -(sinTheta*sinPhi) 637 G4double zPerpendicular = -(sinTheta*sinPhi)*sinBeta/normalisation;
910 638
911 G4double xTotal = (xParallel + xPerpendicula 639 G4double xTotal = (xParallel + xPerpendicular);
912 G4double yTotal = (yParallel + yPerpendicula 640 G4double yTotal = (yParallel + yPerpendicular);
913 G4double zTotal = (zParallel + zPerpendicula 641 G4double zTotal = (zParallel + zPerpendicular);
914 642
915 gammaPolarization1.setX(xTotal); 643 gammaPolarization1.setX(xTotal);
916 gammaPolarization1.setY(yTotal); 644 gammaPolarization1.setY(yTotal);
917 gammaPolarization1.setZ(zTotal); 645 gammaPolarization1.setZ(zTotal);
918 646
919 return gammaPolarization1; 647 return gammaPolarization1;
>> 648
920 } 649 }
921 650
922 //....oooOO0OOooo........oooOO0OOooo........oo 651 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
923 652
924 void G4LivermorePolarizedComptonModel::SystemO 653 void G4LivermorePolarizedComptonModel::SystemOfRefChange(G4ThreeVector& direction0,
925 G4ThreeVector& direction1, 654 G4ThreeVector& direction1,
926 G4ThreeVector& polarization0, 655 G4ThreeVector& polarization0,
927 G4ThreeVector& polarization1) 656 G4ThreeVector& polarization1)
928 { 657 {
929 // direction0 is the original photon directi 658 // direction0 is the original photon direction ---> z
930 // polarization0 is the original photon pola 659 // polarization0 is the original photon polarization ---> x
931 // need to specify y axis in the real refere 660 // need to specify y axis in the real reference frame ---> y
932 G4ThreeVector Axis_Z0 = direction0.unit(); 661 G4ThreeVector Axis_Z0 = direction0.unit();
933 G4ThreeVector Axis_X0 = polarization0.unit() 662 G4ThreeVector Axis_X0 = polarization0.unit();
934 G4ThreeVector Axis_Y0 = (Axis_Z0.cross(Axis_ 663 G4ThreeVector Axis_Y0 = (Axis_Z0.cross(Axis_X0)).unit(); // to be confirmed;
935 664
936 G4double direction_x = direction1.getX(); 665 G4double direction_x = direction1.getX();
937 G4double direction_y = direction1.getY(); 666 G4double direction_y = direction1.getY();
938 G4double direction_z = direction1.getZ(); 667 G4double direction_z = direction1.getZ();
939 668
940 direction1 = (direction_x*Axis_X0 + directio 669 direction1 = (direction_x*Axis_X0 + direction_y*Axis_Y0 + direction_z*Axis_Z0).unit();
941 G4double polarization_x = polarization1.getX 670 G4double polarization_x = polarization1.getX();
942 G4double polarization_y = polarization1.getY 671 G4double polarization_y = polarization1.getY();
943 G4double polarization_z = polarization1.getZ 672 G4double polarization_z = polarization1.getZ();
944 673
945 polarization1 = (polarization_x*Axis_X0 + po 674 polarization1 = (polarization_x*Axis_X0 + polarization_y*Axis_Y0 + polarization_z*Axis_Z0).unit();
946 675
947 } 676 }
948 677
949 678
950 //....oooOO0OOooo........oooOO0OOooo........oo <<
951 //....oooOO0OOooo........oooOO0OOooo........oo <<
952 <<
953 void <<
954 G4LivermorePolarizedComptonModel::InitialiseFo <<
955 G4int Z) <<
956 { <<
957 G4AutoLock l(&LivermorePolarizedComptonModel <<
958 if(!data[Z]) { ReadData(Z); } <<
959 l.unlock(); <<
960 } <<
961 679