| 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: G4LivermorePolarizedGammaConversionModel.hh,v 1.2 2010-11-23 16:42:15 flongo Exp $
>> 27 // GEANT4 tag $Name: not supported by cvs2svn $
26 // 28 //
27 // Authors: G.Depaola & F.Longo 29 // Authors: G.Depaola & F.Longo
28 // 30 //
29 // 31 //
30 32
31 #include "G4LivermorePolarizedGammaConversionM 33 #include "G4LivermorePolarizedGammaConversionModel.hh"
32 #include "G4PhysicalConstants.hh" 34 #include "G4PhysicalConstants.hh"
33 #include "G4SystemOfUnits.hh" 35 #include "G4SystemOfUnits.hh"
34 #include "G4Electron.hh" <<
35 #include "G4Positron.hh" <<
36 #include "G4ParticleChangeForGamma.hh" <<
37 #include "G4Log.hh" <<
38 #include "G4AutoLock.hh" <<
39 #include "G4Exp.hh" <<
40 #include "G4ProductionCutsTable.hh" <<
41 36
42 //....oooOO0OOooo........oooOO0OOooo........oo 37 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
43 38
44 using namespace std; 39 using namespace std;
45 namespace { G4Mutex LivermorePolarizedGammaCon <<
46 <<
47 G4PhysicsFreeVector* G4LivermorePolarizedGamma <<
48 40
49 //....oooOO0OOooo........oooOO0OOooo........oo 41 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
50 42
51 G4LivermorePolarizedGammaConversionModel::G4Li 43 G4LivermorePolarizedGammaConversionModel::G4LivermorePolarizedGammaConversionModel(
52 const G4ParticleDefinition*, const G4String 44 const G4ParticleDefinition*, const G4String& nam)
53 :G4VEmModel(nam), smallEnergy(2.*MeV), isIni << 45 :G4VEmModel(nam),fParticleChange(0),
>> 46 isInitialised(false),meanFreePathTable(0),crossSectionHandler(0)
54 { 47 {
55 fParticleChange = nullptr; <<
56 lowEnergyLimit = 2*electron_mass_c2; 48 lowEnergyLimit = 2*electron_mass_c2;
57 << 49 highEnergyLimit = 100 * GeV;
>> 50 SetLowEnergyLimit(lowEnergyLimit);
>> 51 SetHighEnergyLimit(highEnergyLimit);
>> 52 smallEnergy = 2.*MeV;
>> 53
58 Phi=0.; 54 Phi=0.;
59 Psi=0.; 55 Psi=0.;
60 56
61 verboseLevel= 0; 57 verboseLevel= 0;
62 // Verbosity scale: 58 // Verbosity scale:
63 // 0 = nothing 59 // 0 = nothing
64 // 1 = calculation of cross sections, file o << 60 // 1 = warning for energy non-conservation
65 // 2 = entering in methods << 61 // 2 = details of energy budget
66 << 62 // 3 = calculation of cross sections, file openings, samping of atoms
>> 63 // 4 = entering in methods
>> 64
67 if(verboseLevel > 0) { 65 if(verboseLevel > 0) {
68 G4cout << "Livermore Polarized GammaConver << 66 G4cout << "Livermore Polarized GammaConversion is constructed " << G4endl
>> 67 << "Energy range: "
>> 68 << lowEnergyLimit / keV << " keV - "
>> 69 << highEnergyLimit / GeV << " GeV"
69 << G4endl; 70 << G4endl;
70 } 71 }
71 << 72
>> 73 crossSectionHandler = new G4CrossSectionHandler();
>> 74 crossSectionHandler->Initialise(0,lowEnergyLimit,highEnergyLimit,400);
72 } 75 }
73 76
74 //....oooOO0OOooo........oooOO0OOooo........oo 77 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
75 78
76 G4LivermorePolarizedGammaConversionModel::~G4L 79 G4LivermorePolarizedGammaConversionModel::~G4LivermorePolarizedGammaConversionModel()
77 { 80 {
78 if(IsMaster()) { << 81 delete crossSectionHandler;
79 for(G4int i=0; i<maxZ; ++i) { <<
80 if(data[i]) { <<
81 delete data[i]; <<
82 data[i] = nullptr; <<
83 } <<
84 } <<
85 } <<
86 } 82 }
87 83
>> 84
>> 85
88 //....oooOO0OOooo........oooOO0OOooo........oo 86 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
89 87
90 void G4LivermorePolarizedGammaConversionModel: 88 void G4LivermorePolarizedGammaConversionModel::Initialise(const G4ParticleDefinition* particle,
91 const G 89 const G4DataVector& cuts)
92 { 90 {
93 if (verboseLevel > 1) << 91 if (verboseLevel > 3)
94 { << 92 G4cout << "Calling G4LivermorePolarizedGammaConversionModel::Initialise()" << G4endl;
95 G4cout << "Calling1 G4LivermorePolarized <<
96 << G4endl <<
97 << "Energy range: " <<
98 << LowEnergyLimit() / MeV << " MeV - " <<
99 << HighEnergyLimit() / GeV << " G <<
100 << G4endl; <<
101 } <<
102 <<
103 if(IsMaster()) <<
104 { <<
105 // Initialise element selector <<
106 InitialiseElementSelectors(particle, cut <<
107 <<
108 // Access to elements <<
109 const char* path = G4FindDataDir("G4LEDA <<
110 <<
111 G4ProductionCutsTable* theCoupleTable = <<
112 G4ProductionCutsTable::GetProductionCutsTabl <<
113 <<
114 G4int numOfCouples = (G4int)theCoupleTab <<
115 <<
116 for(G4int i=0; i<numOfCouples; ++i) <<
117 { <<
118 const G4Material* material = <<
119 theCoupleTable->GetMaterialCutsCouple(i) <<
120 const G4ElementVector* theElementVector = <<
121 std::size_t nelm = material->GetNumberOfEl <<
122 <<
123 for (std::size_t j=0; j<nelm; ++j) <<
124 { <<
125 G4int Z = (G4int)(*theElementVector)[j <<
126 if(Z < 1) { Z = 1; } <<
127 else if(Z > maxZ) { Z = maxZ; } <<
128 if(!data[Z]) { ReadData(Z, path); } <<
129 } <<
130 } <<
131 } <<
132 if(isInitialised) { return; } <<
133 fParticleChange = GetParticleChangeForGamma( <<
134 isInitialised = true; <<
135 } <<
136 <<
137 //....oooOO0OOooo........oooOO0OOooo........oo <<
138 93
139 void G4LivermorePolarizedGammaConversionModel: << 94 if (crossSectionHandler)
140 const G4ParticleDefinition*, G4VEmModel* << 95 {
141 { << 96 crossSectionHandler->Clear();
142 SetElementSelectors(masterModel->GetElementS << 97 delete crossSectionHandler;
143 } << 98 }
144 99
145 //....oooOO0OOooo........oooOO0OOooo........oo << 100 // Energy limits
>> 101 /*
>> 102 // V.Ivanchenko: this was meanless check
>> 103 if (LowEnergyLimit() < lowEnergyLimit)
>> 104 {
>> 105 G4cout << "G4LivermorePolarizedGammaConversionModel: low energy limit increased from " <<
>> 106 LowEnergyLimit()/eV << " eV to " << lowEnergyLimit << " eV" << G4endl;
>> 107 // SetLowEnergyLimit(lowEnergyLimit);
>> 108 }
>> 109 */
>> 110 if (HighEnergyLimit() > highEnergyLimit)
>> 111 {
>> 112 G4cout << "G4LivermorePolarizedGammaConversionModel: high energy limit decreased from " <<
>> 113 HighEnergyLimit()/GeV << " GeV to " << highEnergyLimit << " GeV" << G4endl;
>> 114 // V.Ivanchenko: this is forbidden
>> 115 // SetHighEnergyLimit(highEnergyLimit);
>> 116 }
>> 117
>> 118 // Reading of data files - all materials are read
>> 119
>> 120 crossSectionHandler = new G4CrossSectionHandler;
>> 121 crossSectionHandler->Clear();
>> 122 G4String crossSectionFile = "pair/pp-cs-";
>> 123 crossSectionHandler->LoadData(crossSectionFile);
146 124
147 G4double G4LivermorePolarizedGammaConversionMo << 125 //
148 const G4ParticleDefinition*, G4doub << 126 if (verboseLevel > 2) {
149 { << 127 G4cout << "Loaded cross section files for Livermore Polarized GammaConversion model"
150 return lowEnergyLimit; << 128 << G4endl;
151 } << 129 }
>> 130 InitialiseElementSelectors(particle,cuts);
152 131
153 //....oooOO0OOooo........oooOO0OOooo........oo << 132 if(verboseLevel > 0) {
>> 133 G4cout << "Livermore Polarized GammaConversion model is initialized " << G4endl
>> 134 << "Energy range: "
>> 135 << LowEnergyLimit() / keV << " keV - "
>> 136 << HighEnergyLimit() / GeV << " GeV"
>> 137 << G4endl;
>> 138 }
154 139
155 void G4LivermorePolarizedGammaConversionModel: << 140 //
156 { << 141 if(!isInitialised) {
157 if (verboseLevel > 1) << 142 isInitialised = true;
158 { << 143 fParticleChange = GetParticleChangeForGamma();
159 G4cout << "Calling ReadData() of G4Liver << 144 }
160 << G4endl; <<
161 } <<
162 <<
163 if(data[Z]) { return; } <<
164 <<
165 const char* datadir = path; <<
166 <<
167 if(!datadir) <<
168 { <<
169 datadir = G4FindDataDir("G4LEDATA"); <<
170 if(!datadir) <<
171 { <<
172 G4Exception("G4LivermorePolarizedGammaConv <<
173 "em0006",FatalException, <<
174 "Environment variable G4LEDATA not d <<
175 return; <<
176 } <<
177 } <<
178 // <<
179 data[Z] = new G4PhysicsFreeVector(0,/*spline <<
180 // <<
181 std::ostringstream ost; <<
182 ost << datadir << "/livermore/pair/pp-cs-" < <<
183 std::ifstream fin(ost.str().c_str()); <<
184 <<
185 if( !fin.is_open()) <<
186 { <<
187 G4ExceptionDescription ed; <<
188 ed << "G4LivermorePolarizedGammaConversi <<
189 << "> is not opened!" << G4endl; <<
190 G4Exception("G4LivermorePolarizedGammaCo <<
191 "em0003",FatalException, <<
192 ed,"G4LEDATA version should be G4EMLOW6. <<
193 return; <<
194 } <<
195 else <<
196 { <<
197 <<
198 if(verboseLevel > 3) { G4cout << "File " <<
199 << " is opened by G4LivermorePolar <<
200 <<
201 data[Z]->Retrieve(fin, true); <<
202 } <<
203 <<
204 // Activation of spline interpolation <<
205 data[Z]->FillSecondDerivatives(); <<
206 <<
207 } 145 }
208 146
209 //....oooOO0OOooo........oooOO0OOooo........oo 147 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
210 148
211 G4double G4LivermorePolarizedGammaConversionMo 149 G4double G4LivermorePolarizedGammaConversionModel::ComputeCrossSectionPerAtom(
212 const G 150 const G4ParticleDefinition*,
213 G4double GammaEnergy, 151 G4double GammaEnergy,
214 G4double Z, G4double, 152 G4double Z, G4double,
215 G4double, G4double) 153 G4double, G4double)
216 { 154 {
217 if (verboseLevel > 1) { << 155 if (verboseLevel > 3) {
218 G4cout << "G4LivermorePolarizedGammaConver 156 G4cout << "G4LivermorePolarizedGammaConversionModel::ComputeCrossSectionPerAtom()"
219 << G4endl; 157 << G4endl;
220 } 158 }
221 if (GammaEnergy < lowEnergyLimit) { return 0 << 159 if(Z < 0.9 || GammaEnergy <= lowEnergyLimit) { return 0.0; }
222 << 160 G4double cs = crossSectionHandler->FindValue(G4int(Z), GammaEnergy);
223 G4double xs = 0.0; << 161 return cs;
224 <<
225 G4int intZ=G4int(Z); <<
226 <<
227 if(intZ < 1 || intZ > maxZ) { return xs; } <<
228 <<
229 G4PhysicsFreeVector* pv = data[intZ]; <<
230 <<
231 // if element was not initialised <<
232 // do initialisation safely for MT mode <<
233 if(!pv) <<
234 { <<
235 InitialiseForElement(0, intZ); <<
236 pv = data[intZ]; <<
237 if(!pv) { return xs; } <<
238 } <<
239 // x-section is taken from the table <<
240 xs = pv->Value(GammaEnergy); <<
241 <<
242 if(verboseLevel > 0) <<
243 { <<
244 G4int n = G4int(pv->GetVectorLength() - <<
245 G4cout << "****** DEBUG: tcs value for <<
246 << GammaEnergy/MeV << G4endl; <<
247 G4cout << " cs (Geant4 internal unit) <<
248 G4cout << " -> first cs value in EA <<
249 G4cout << " -> last cs value in EA <<
250 G4cout << "*************************** <<
251 } <<
252 <<
253 return xs; <<
254 } 162 }
255 163
256 //....oooOO0OOooo........oooOO0OOooo........oo 164 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
257 165
258 void 166 void
259 G4LivermorePolarizedGammaConversionModel::Samp 167 G4LivermorePolarizedGammaConversionModel::SampleSecondaries(std::vector<G4DynamicParticle*>* fvect,
260 const G4MaterialCutsCouple* 168 const G4MaterialCutsCouple* couple,
261 const G4DynamicParticle* aDy 169 const G4DynamicParticle* aDynamicGamma,
262 G4double, 170 G4double,
263 G4double) 171 G4double)
264 { 172 {
265 173
266 // Fluorescence generated according to: 174 // Fluorescence generated according to:
267 // J. Stepanek ,"A program to determine the 175 // J. Stepanek ,"A program to determine the radiation spectra due to a single atomic
268 // subshell ionisation by a particle or due 176 // subshell ionisation by a particle or due to deexcitation or decay of radionuclides",
269 // Comp. Phys. Comm. 1206 pp 1-1-9 (1997) 177 // Comp. Phys. Comm. 1206 pp 1-1-9 (1997)
>> 178
270 if (verboseLevel > 3) 179 if (verboseLevel > 3)
271 G4cout << "Calling SampleSecondaries() of 180 G4cout << "Calling SampleSecondaries() of G4LivermorePolarizedGammaConversionModel" << G4endl;
272 181
273 G4double photonEnergy = aDynamicGamma->GetKi 182 G4double photonEnergy = aDynamicGamma->GetKineticEnergy();
>> 183 // Within energy limit?
274 184
275 if(photonEnergy <= lowEnergyLimit) 185 if(photonEnergy <= lowEnergyLimit)
276 { 186 {
277 fParticleChange->ProposeTrackStatus(fSto 187 fParticleChange->ProposeTrackStatus(fStopAndKill);
278 fParticleChange->SetProposedKineticEnerg 188 fParticleChange->SetProposedKineticEnergy(0.);
279 return; 189 return;
280 } 190 }
281 191
>> 192
282 G4ThreeVector gammaPolarization0 = aDynamicG 193 G4ThreeVector gammaPolarization0 = aDynamicGamma->GetPolarization();
283 G4ThreeVector gammaDirection0 = aDynamicGamm 194 G4ThreeVector gammaDirection0 = aDynamicGamma->GetMomentumDirection();
284 195
285 // Make sure that the polarization vector is 196 // Make sure that the polarization vector is perpendicular to the
286 // gamma direction. If not 197 // gamma direction. If not
>> 198
287 if(!(gammaPolarization0.isOrthogonal(gammaDi 199 if(!(gammaPolarization0.isOrthogonal(gammaDirection0, 1e-6))||(gammaPolarization0.mag()==0))
288 { // only for testing now 200 { // only for testing now
289 gammaPolarization0 = GetRandomPolarizati 201 gammaPolarization0 = GetRandomPolarization(gammaDirection0);
290 } 202 }
291 else 203 else
292 { 204 {
293 if ( gammaPolarization0.howOrthogonal(ga 205 if ( gammaPolarization0.howOrthogonal(gammaDirection0) != 0)
294 { 206 {
295 gammaPolarization0 = GetPerpendicularPolar 207 gammaPolarization0 = GetPerpendicularPolarization(gammaDirection0, gammaPolarization0);
296 } 208 }
297 } 209 }
298 210
299 // End of Protection 211 // End of Protection
300 212
>> 213
301 G4double epsilon ; 214 G4double epsilon ;
302 G4double epsilon0Local = electron_mass_c2 / 215 G4double epsilon0Local = electron_mass_c2 / photonEnergy ;
303 216
304 // Do it fast if photon energy < 2. MeV 217 // Do it fast if photon energy < 2. MeV
305 218
306 if (photonEnergy < smallEnergy ) 219 if (photonEnergy < smallEnergy )
307 { 220 {
308 epsilon = epsilon0Local + (0.5 - epsilon 221 epsilon = epsilon0Local + (0.5 - epsilon0Local) * G4UniformRand();
309 } 222 }
310 else 223 else
311 { 224 {
312 // Select randomly one element in the cu << 225
>> 226 // Select randomly one element in the current material
>> 227
>> 228 // G4int Z = crossSectionHandler->SelectRandomAtom(couple,photonEnergy);
>> 229 //const G4Element* element = crossSectionHandler->SelectRandomElement(couple,photonEnergy);
>> 230
313 const G4ParticleDefinition* particle = 231 const G4ParticleDefinition* particle = aDynamicGamma->GetDefinition();
314 const G4Element* element = SelectRandomA 232 const G4Element* element = SelectRandomAtom(couple,particle,photonEnergy);
315 << 233
316 if (element == nullptr) << 234 /*
>> 235 if (element == 0)
317 { 236 {
318 G4cout << "G4LivermorePolarizedGamma << 237 G4cout << "G4LivermorePolarizedGammaConversionModel::PostStepDoIt - element = 0" << G4endl;
319 return; <<
320 } 238 }
>> 239 */
321 240
>> 241 G4IonisParamElm* ionisation = element->GetIonisation();
322 242
323 G4IonisParamElm* ionisation = element->G << 243 /*
324 if (ionisation == nullptr) << 244 if (ionisation == 0)
325 { 245 {
326 G4cout << "G4LivermorePolarizedGamma << 246 G4cout << "G4LivermorePolarizedGammaConversionModel::PostStepDoIt - ionisation = 0" << G4endl;
327 return; <<
328 } 247 }
329 << 248 */
>> 249
>> 250
330 // Extract Coulomb factor for this Eleme 251 // Extract Coulomb factor for this Element
>> 252
331 G4double fZ = 8. * (ionisation->GetlogZ3 253 G4double fZ = 8. * (ionisation->GetlogZ3());
332 if (photonEnergy > 50. * MeV) fZ += 8. * 254 if (photonEnergy > 50. * MeV) fZ += 8. * (element->GetfCoulomb());
333 255
334 // Limits of the screening variable 256 // Limits of the screening variable
335 G4double screenFactor = 136. * epsilon0L 257 G4double screenFactor = 136. * epsilon0Local / (element->GetIonisation()->GetZ3()) ;
336 G4double screenMax = G4Exp ((42.24 - fZ) << 258 G4double screenMax = exp ((42.24 - fZ)/8.368) - 0.952 ;
337 G4double screenMin = std::min(4.*screenF 259 G4double screenMin = std::min(4.*screenFactor,screenMax) ;
338 260
339 // Limits of the energy sampling 261 // Limits of the energy sampling
340 G4double epsilon1 = 0.5 - 0.5 * sqrt(1. 262 G4double epsilon1 = 0.5 - 0.5 * sqrt(1. - screenMin / screenMax) ;
341 G4double epsilonMin = std::max(epsilon0L 263 G4double epsilonMin = std::max(epsilon0Local,epsilon1);
342 G4double epsilonRange = 0.5 - epsilonMin 264 G4double epsilonRange = 0.5 - epsilonMin ;
343 265
344 // Sample the energy rate of the created 266 // Sample the energy rate of the created electron (or positron)
345 G4double screen; 267 G4double screen;
346 G4double gReject ; 268 G4double gReject ;
347 269
348 G4double f10 = ScreenFunction1(screenMin 270 G4double f10 = ScreenFunction1(screenMin) - fZ;
349 G4double f20 = ScreenFunction2(screenMin 271 G4double f20 = ScreenFunction2(screenMin) - fZ;
350 G4double normF1 = std::max(f10 * epsilon 272 G4double normF1 = std::max(f10 * epsilonRange * epsilonRange,0.);
351 G4double normF2 = std::max(1.5 * f20,0.) 273 G4double normF2 = std::max(1.5 * f20,0.);
352 274
353 do { 275 do {
354 if (normF1 / (normF1 + normF2) > G4Uni 276 if (normF1 / (normF1 + normF2) > G4UniformRand() )
355 { 277 {
356 epsilon = 0.5 - epsilonRange * pow 278 epsilon = 0.5 - epsilonRange * pow(G4UniformRand(), 0.3333) ;
357 screen = screenFactor / (epsilon * 279 screen = screenFactor / (epsilon * (1. - epsilon));
358 gReject = (ScreenFunction1(screen) 280 gReject = (ScreenFunction1(screen) - fZ) / f10 ;
359 } 281 }
360 else 282 else
361 { 283 {
362 epsilon = epsilonMin + epsilonRang 284 epsilon = epsilonMin + epsilonRange * G4UniformRand();
363 screen = screenFactor / (epsilon * 285 screen = screenFactor / (epsilon * (1 - epsilon));
364 gReject = (ScreenFunction2(screen) 286 gReject = (ScreenFunction2(screen) - fZ) / f20 ;
>> 287
>> 288
365 } 289 }
366 } while ( gReject < G4UniformRand() ); 290 } while ( gReject < G4UniformRand() );
>> 291
367 } // End of epsilon sampling 292 } // End of epsilon sampling
368 293
369 // Fix charges randomly 294 // Fix charges randomly
>> 295
370 G4double electronTotEnergy; 296 G4double electronTotEnergy;
371 G4double positronTotEnergy; 297 G4double positronTotEnergy;
372 298
373 if (G4UniformRand() > 0.5) << 299
>> 300 if (G4int(2*G4UniformRand()))
374 { 301 {
375 electronTotEnergy = (1. - epsilon) * pho 302 electronTotEnergy = (1. - epsilon) * photonEnergy;
376 positronTotEnergy = epsilon * photonEner 303 positronTotEnergy = epsilon * photonEnergy;
377 } 304 }
378 else 305 else
379 { 306 {
380 positronTotEnergy = (1. - epsilon) * pho 307 positronTotEnergy = (1. - epsilon) * photonEnergy;
381 electronTotEnergy = epsilon * photonEner 308 electronTotEnergy = epsilon * photonEnergy;
382 } 309 }
383 << 310
384 // Scattered electron (positron) angles. ( Z 311 // Scattered electron (positron) angles. ( Z - axis along the parent photon)
385 // Universal distribution suggested by L. Ur 312 // Universal distribution suggested by L. Urban (Geant3 manual (1993) Phys211),
386 // derived from Tsai distribution (Rev. Mod. 313 // derived from Tsai distribution (Rev. Mod. Phys. 49, 421 (1977)
>> 314
>> 315 /*
>> 316 G4double u;
>> 317 const G4double a1 = 0.625;
>> 318 G4double a2 = 3. * a1;
>> 319
>> 320 if (0.25 > G4UniformRand())
>> 321 {
>> 322 u = - log(G4UniformRand() * G4UniformRand()) / a1 ;
>> 323 }
>> 324 else
>> 325 {
>> 326 u = - log(G4UniformRand() * G4UniformRand()) / a2 ;
>> 327 }
>> 328 */
>> 329
387 G4double Ene = electronTotEnergy/electron_ma 330 G4double Ene = electronTotEnergy/electron_mass_c2; // Normalized energy
388 331
389 G4double cosTheta = 0.; 332 G4double cosTheta = 0.;
390 G4double sinTheta = 0.; 333 G4double sinTheta = 0.;
391 334
392 SetTheta(&cosTheta,&sinTheta,Ene); 335 SetTheta(&cosTheta,&sinTheta,Ene);
>> 336
>> 337 // G4double theta = u * electron_mass_c2 / photonEnergy ;
>> 338 // G4double phi = twopi * G4UniformRand() ;
>> 339
393 G4double phi,psi=0.; 340 G4double phi,psi=0.;
394 341
395 //corrected e+ e- angular angular distributi 342 //corrected e+ e- angular angular distribution //preliminary!
>> 343
>> 344 // if(photonEnergy>50*MeV)
>> 345 // {
396 phi = SetPhi(photonEnergy); 346 phi = SetPhi(photonEnergy);
397 psi = SetPsi(photonEnergy,phi); 347 psi = SetPsi(photonEnergy,phi);
>> 348 // }
>> 349 //else
>> 350 // {
>> 351 //psi = G4UniformRand()*2.*pi;
>> 352 //phi = pi; // coplanar
>> 353 // }
>> 354
398 Psi = psi; 355 Psi = psi;
399 Phi = phi; 356 Phi = phi;
>> 357 //G4cout << "PHI " << phi << G4endl;
>> 358 //G4cout << "PSI " << psi << G4endl;
400 359
401 G4double phie, phip; << 360 G4double phie = psi; //azimuthal angle for the electron
402 G4double choice, choice2; <<
403 choice = G4UniformRand(); <<
404 choice2 = G4UniformRand(); <<
405 361
406 if (choice2 <= 0.5) <<
407 { <<
408 // do nothing <<
409 // phi = phi; <<
410 } <<
411 else <<
412 { <<
413 phi = -phi; <<
414 } <<
415 <<
416 if (choice <= 0.5) <<
417 { <<
418 phie = psi; //azimuthal angle for the el <<
419 phip = phie+phi; //azimuthal angle for t <<
420 } <<
421 else <<
422 { <<
423 // opzione 1 phie / phip equivalenti <<
424 phip = psi; //azimuthal angle for the po <<
425 phie = phip + phi; //azimuthal angle for <<
426 } <<
427 <<
428 <<
429 // Electron Kinematics <<
430 G4double dirX = sinTheta*cos(phie); 362 G4double dirX = sinTheta*cos(phie);
431 G4double dirY = sinTheta*sin(phie); 363 G4double dirY = sinTheta*sin(phie);
432 G4double dirZ = cosTheta; 364 G4double dirZ = cosTheta;
433 G4ThreeVector electronDirection(dirX,dirY,di 365 G4ThreeVector electronDirection(dirX,dirY,dirZ);
434 <<
435 // Kinematics of the created pair: 366 // Kinematics of the created pair:
436 // the electron and positron are assumed to 367 // the electron and positron are assumed to have a symetric angular
437 // distribution with respect to the Z axis a 368 // distribution with respect to the Z axis along the parent photon
438 369
>> 370 //G4double localEnergyDeposit = 0. ;
>> 371
439 G4double electronKineEnergy = std::max(0.,el 372 G4double electronKineEnergy = std::max(0.,electronTotEnergy - electron_mass_c2) ;
440 373
441 SystemOfRefChange(gammaDirection0,electronDi 374 SystemOfRefChange(gammaDirection0,electronDirection,
442 gammaPolarization0); 375 gammaPolarization0);
443 376
444 G4DynamicParticle* particle1 = new G4Dynamic 377 G4DynamicParticle* particle1 = new G4DynamicParticle (G4Electron::Electron(),
445 electronDirection, 378 electronDirection,
446 electronKineEnergy); 379 electronKineEnergy);
447 380
448 // The e+ is always created (even with kinet 381 // The e+ is always created (even with kinetic energy = 0) for further annihilation
>> 382
449 Ene = positronTotEnergy/electron_mass_c2; // 383 Ene = positronTotEnergy/electron_mass_c2; // Normalized energy
450 384
451 cosTheta = 0.; 385 cosTheta = 0.;
452 sinTheta = 0.; 386 sinTheta = 0.;
453 387
454 SetTheta(&cosTheta,&sinTheta,Ene); 388 SetTheta(&cosTheta,&sinTheta,Ene);
>> 389 G4double phip = phie+phi; //azimuthal angle for the positron
455 390
456 // Positron Kinematics <<
457 dirX = sinTheta*cos(phip); 391 dirX = sinTheta*cos(phip);
458 dirY = sinTheta*sin(phip); 392 dirY = sinTheta*sin(phip);
459 dirZ = cosTheta; 393 dirZ = cosTheta;
460 G4ThreeVector positronDirection(dirX,dirY,di 394 G4ThreeVector positronDirection(dirX,dirY,dirZ);
461 395
462 G4double positronKineEnergy = std::max(0.,po 396 G4double positronKineEnergy = std::max(0.,positronTotEnergy - electron_mass_c2) ;
463 SystemOfRefChange(gammaDirection0,positronDi 397 SystemOfRefChange(gammaDirection0,positronDirection,
464 gammaPolarization0); 398 gammaPolarization0);
465 399
466 // Create G4DynamicParticle object for the p 400 // Create G4DynamicParticle object for the particle2
467 G4DynamicParticle* particle2 = new G4Dynamic 401 G4DynamicParticle* particle2 = new G4DynamicParticle(G4Positron::Positron(),
468 402 positronDirection, positronKineEnergy);
>> 403
>> 404
469 fvect->push_back(particle1); 405 fvect->push_back(particle1);
470 fvect->push_back(particle2); 406 fvect->push_back(particle2);
471 407
>> 408
>> 409
472 // Kill the incident photon 410 // Kill the incident photon
>> 411
>> 412
>> 413
>> 414 // Create lists of pointers to DynamicParticles (photons and electrons)
>> 415 // (Is the electron vector necessary? To be checked)
>> 416 // std::vector<G4DynamicParticle*>* photonVector = 0;
>> 417 //std::vector<G4DynamicParticle*> electronVector;
>> 418
>> 419 fParticleChange->ProposeMomentumDirection( 0., 0., 0. );
473 fParticleChange->SetProposedKineticEnergy(0. 420 fParticleChange->SetProposedKineticEnergy(0.);
474 fParticleChange->ProposeTrackStatus(fStopAnd 421 fParticleChange->ProposeTrackStatus(fStopAndKill);
>> 422
475 } 423 }
476 424
477 //....oooOO0OOooo........oooOO0OOooo........oo 425 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
478 426
479 G4double G4LivermorePolarizedGammaConversionMo 427 G4double G4LivermorePolarizedGammaConversionModel::ScreenFunction1(G4double screenVariable)
480 { 428 {
481 // Compute the value of the screening functi 429 // Compute the value of the screening function 3*phi1 - phi2
>> 430
482 G4double value; 431 G4double value;
>> 432
483 if (screenVariable > 1.) 433 if (screenVariable > 1.)
484 value = 42.24 - 8.368 * log(screenVariable 434 value = 42.24 - 8.368 * log(screenVariable + 0.952);
485 else 435 else
486 value = 42.392 - screenVariable * (7.796 - 436 value = 42.392 - screenVariable * (7.796 - 1.961 * screenVariable);
487 437
488 return value; 438 return value;
489 } 439 }
490 440
491 441
492 442
493 G4double G4LivermorePolarizedGammaConversionMo 443 G4double G4LivermorePolarizedGammaConversionModel::ScreenFunction2(G4double screenVariable)
494 { 444 {
495 // Compute the value of the screening functi 445 // Compute the value of the screening function 1.5*phi1 - 0.5*phi2
>> 446
496 G4double value; 447 G4double value;
497 448
498 if (screenVariable > 1.) 449 if (screenVariable > 1.)
499 value = 42.24 - 8.368 * log(screenVariable 450 value = 42.24 - 8.368 * log(screenVariable + 0.952);
500 else 451 else
501 value = 41.405 - screenVariable * (5.828 - 452 value = 41.405 - screenVariable * (5.828 - 0.8945 * screenVariable);
502 453
503 return value; 454 return value;
504 } 455 }
505 456
506 457
507 void G4LivermorePolarizedGammaConversionModel: 458 void G4LivermorePolarizedGammaConversionModel::SetTheta(G4double* p_cosTheta, G4double* p_sinTheta, G4double Energy)
508 { 459 {
>> 460
509 // to avoid computational errors since Theta 461 // to avoid computational errors since Theta could be very small
510 // Energy in Normalized Units (!) 462 // Energy in Normalized Units (!)
511 463
512 G4double Momentum = sqrt(Energy*Energy -1); 464 G4double Momentum = sqrt(Energy*Energy -1);
513 G4double Rand = G4UniformRand(); 465 G4double Rand = G4UniformRand();
514 466
515 *p_cosTheta = (Energy*((2*Rand)- 1) + Moment 467 *p_cosTheta = (Energy*((2*Rand)- 1) + Momentum)/((Momentum*(2*Rand-1))+Energy);
516 *p_sinTheta = (2*sqrt(Rand*(1-Rand)))/(Momen 468 *p_sinTheta = (2*sqrt(Rand*(1-Rand)))/(Momentum*(2*Rand-1)+Energy);
517 } 469 }
518 470
519 471
520 472
521 G4double G4LivermorePolarizedGammaConversionMo 473 G4double G4LivermorePolarizedGammaConversionModel::SetPhi(G4double Energy)
522 { 474 {
>> 475
>> 476
523 G4double value = 0.; 477 G4double value = 0.;
524 G4double Ene = Energy/MeV; 478 G4double Ene = Energy/MeV;
525 479
526 G4double pl[4]; 480 G4double pl[4];
>> 481
>> 482
527 G4double pt[2]; 483 G4double pt[2];
528 G4double xi = 0; 484 G4double xi = 0;
529 G4double xe = 0.; 485 G4double xe = 0.;
530 G4double n1=0.; 486 G4double n1=0.;
531 G4double n2=0.; 487 G4double n2=0.;
532 488
>> 489
533 if (Ene>=50.) 490 if (Ene>=50.)
534 { 491 {
535 const G4double ay0=5.6, by0=18.6, aa0=2. 492 const G4double ay0=5.6, by0=18.6, aa0=2.9, ba0 = 8.16E-3;
536 const G4double aw = 0.0151, bw = 10.7, c 493 const G4double aw = 0.0151, bw = 10.7, cw = -410.;
537 494
538 const G4double axc = 3.1455, bxc = -1.11 495 const G4double axc = 3.1455, bxc = -1.11, cxc = 310.;
539 496
540 pl[0] = Fln(ay0,by0,Ene); 497 pl[0] = Fln(ay0,by0,Ene);
541 pl[1] = aa0 + ba0*(Ene); 498 pl[1] = aa0 + ba0*(Ene);
542 pl[2] = Poli(aw,bw,cw,Ene); 499 pl[2] = Poli(aw,bw,cw,Ene);
543 pl[3] = Poli(axc,bxc,cxc,Ene); 500 pl[3] = Poli(axc,bxc,cxc,Ene);
544 501
545 const G4double abf = 3.1216, bbf = 2.68; 502 const G4double abf = 3.1216, bbf = 2.68;
546 pt[0] = -1.4; 503 pt[0] = -1.4;
547 pt[1] = abf + bbf/Ene; 504 pt[1] = abf + bbf/Ene;
548 505
>> 506
>> 507
>> 508 //G4cout << "PL > 50. "<< pl[0] << " " << pl[1] << " " << pl[2] << " " <<pl[3] << " " << G4endl;
>> 509
549 xi = 3.0; 510 xi = 3.0;
550 xe = Encu(pl,pt,xi); 511 xe = Encu(pl,pt,xi);
>> 512 //G4cout << "ENCU "<< xe << G4endl;
551 n1 = Fintlor(pl,pi) - Fintlor(pl,xe); 513 n1 = Fintlor(pl,pi) - Fintlor(pl,xe);
552 n2 = Finttan(pt,xe) - Finttan(pt,0.); 514 n2 = Finttan(pt,xe) - Finttan(pt,0.);
553 } 515 }
554 else 516 else
555 { 517 {
556 const G4double ay0=0.144, by0=0.11; 518 const G4double ay0=0.144, by0=0.11;
557 const G4double aa0=2.7, ba0 = 2.74; 519 const G4double aa0=2.7, ba0 = 2.74;
558 const G4double aw = 0.21, bw = 10.8, cw 520 const G4double aw = 0.21, bw = 10.8, cw = -58.;
559 const G4double axc = 3.17, bxc = -0.87, 521 const G4double axc = 3.17, bxc = -0.87, cxc = -6.;
560 522
561 pl[0] = Fln(ay0, by0, Ene); 523 pl[0] = Fln(ay0, by0, Ene);
562 pl[1] = Fln(aa0, ba0, Ene); 524 pl[1] = Fln(aa0, ba0, Ene);
563 pl[2] = Poli(aw,bw,cw,Ene); 525 pl[2] = Poli(aw,bw,cw,Ene);
564 pl[3] = Poli(axc,bxc,cxc,Ene); 526 pl[3] = Poli(axc,bxc,cxc,Ene);
565 527
>> 528 //G4cout << "PL < 50."<< pl[0] << " " << pl[1] << " " << pl[2] << " " <<pl[3] << " " << G4endl;
>> 529 //G4cout << "ENCU "<< xe << G4endl;
566 n1 = Fintlor(pl,pi) - Fintlor(pl,xe); 530 n1 = Fintlor(pl,pi) - Fintlor(pl,xe);
>> 531
567 } 532 }
568 533
569 534
570 G4double n=0.; 535 G4double n=0.;
571 n = n1+n2; 536 n = n1+n2;
572 537
573 G4double c1 = 0.; 538 G4double c1 = 0.;
574 c1 = Glor(pl, xe); 539 c1 = Glor(pl, xe);
575 540
>> 541 /*
>> 542 G4double xm = 0.;
>> 543 xm = Flor(pl,pl[3])*Glor(pl,pl[3]);
>> 544 */
>> 545
576 G4double r1,r2,r3; 546 G4double r1,r2,r3;
577 G4double xco=0.; 547 G4double xco=0.;
578 548
579 if (Ene>=50.) 549 if (Ene>=50.)
580 { 550 {
581 r1= G4UniformRand(); 551 r1= G4UniformRand();
582 if( r1>=n2/n) 552 if( r1>=n2/n)
583 { 553 {
584 do 554 do
585 { 555 {
586 r2 = G4UniformRand(); 556 r2 = G4UniformRand();
587 value = Finvlor(pl,xe,r2); 557 value = Finvlor(pl,xe,r2);
588 xco = Glor(pl,value)/c1; 558 xco = Glor(pl,value)/c1;
589 r3 = G4UniformRand(); 559 r3 = G4UniformRand();
590 } while(r3>=xco); 560 } while(r3>=xco);
591 } 561 }
592 else 562 else
593 { 563 {
594 value = Finvtan(pt,n,r1); 564 value = Finvtan(pt,n,r1);
595 } 565 }
596 } 566 }
597 else 567 else
598 { 568 {
599 do 569 do
600 { 570 {
601 r2 = G4UniformRand(); 571 r2 = G4UniformRand();
602 value = Finvlor(pl,xe,r2); 572 value = Finvlor(pl,xe,r2);
603 xco = Glor(pl,value)/c1; 573 xco = Glor(pl,value)/c1;
604 r3 = G4UniformRand(); 574 r3 = G4UniformRand();
605 } while(r3>=xco); 575 } while(r3>=xco);
606 } 576 }
>> 577
>> 578 // G4cout << "PHI = " <<value << G4endl;
607 return value; 579 return value;
608 } 580 }
609 <<
610 //....oooOO0OOooo........oooOO0OOooo........oo <<
611 <<
612 G4double G4LivermorePolarizedGammaConversionMo 581 G4double G4LivermorePolarizedGammaConversionModel::SetPsi(G4double Energy, G4double PhiLocal)
613 { 582 {
>> 583
614 G4double value = 0.; 584 G4double value = 0.;
615 G4double Ene = Energy/MeV; 585 G4double Ene = Energy/MeV;
616 586
617 G4double p0l[4]; 587 G4double p0l[4];
618 G4double ppml[4]; 588 G4double ppml[4];
619 G4double p0t[2]; 589 G4double p0t[2];
620 G4double ppmt[2]; 590 G4double ppmt[2];
621 591
622 G4double xi = 0.; 592 G4double xi = 0.;
623 G4double xe0 = 0.; 593 G4double xe0 = 0.;
624 G4double xepm = 0.; 594 G4double xepm = 0.;
625 595
626 if (Ene>=50.) 596 if (Ene>=50.)
627 { 597 {
628 const G4double ay00 = 3.4, by00 = 9.8, a 598 const G4double ay00 = 3.4, by00 = 9.8, aa00 = 1.34, ba00 = 5.3;
629 const G4double aw0 = 0.014, bw0 = 9.7, c 599 const G4double aw0 = 0.014, bw0 = 9.7, cw0 = -2.E4;
630 const G4double axc0 = 3.1423, bxc0 = -2. 600 const G4double axc0 = 3.1423, bxc0 = -2.35, cxc0 = 0.;
631 const G4double ay0p = 1.53, by0p = 3.2, 601 const G4double ay0p = 1.53, by0p = 3.2, aap = 0.67, bap = 8.5E-3;
632 const G4double awp = 6.9E-3, bwp = 12.6, 602 const G4double awp = 6.9E-3, bwp = 12.6, cwp = -3.8E4;
633 const G4double axcp = 2.8E-3,bxcp = -3.1 603 const G4double axcp = 2.8E-3,bxcp = -3.133;
634 const G4double abf0 = 3.1213, bbf0 = 2.6 604 const G4double abf0 = 3.1213, bbf0 = 2.61;
635 const G4double abfpm = 3.1231, bbfpm = 2 605 const G4double abfpm = 3.1231, bbfpm = 2.84;
636 606
637 p0l[0] = Fln(ay00, by00, Ene); 607 p0l[0] = Fln(ay00, by00, Ene);
638 p0l[1] = Fln(aa00, ba00, Ene); 608 p0l[1] = Fln(aa00, ba00, Ene);
639 p0l[2] = Poli(aw0, bw0, cw0, Ene); 609 p0l[2] = Poli(aw0, bw0, cw0, Ene);
640 p0l[3] = Poli(axc0, bxc0, cxc0, Ene); 610 p0l[3] = Poli(axc0, bxc0, cxc0, Ene);
641 611
642 ppml[0] = Fln(ay0p, by0p, Ene); 612 ppml[0] = Fln(ay0p, by0p, Ene);
643 ppml[1] = aap + bap*(Ene); 613 ppml[1] = aap + bap*(Ene);
644 ppml[2] = Poli(awp, bwp, cwp, Ene); 614 ppml[2] = Poli(awp, bwp, cwp, Ene);
645 ppml[3] = Fln(axcp,bxcp,Ene); 615 ppml[3] = Fln(axcp,bxcp,Ene);
646 616
647 p0t[0] = -0.81; 617 p0t[0] = -0.81;
648 p0t[1] = abf0 + bbf0/Ene; 618 p0t[1] = abf0 + bbf0/Ene;
649 ppmt[0] = -0.6; 619 ppmt[0] = -0.6;
650 ppmt[1] = abfpm + bbfpm/Ene; 620 ppmt[1] = abfpm + bbfpm/Ene;
651 621
>> 622 //G4cout << "P0L > 50"<< p0l[0] << " " << p0l[1] << " " << p0l[2] << " " <<p0l[3] << " " << G4endl;
>> 623 //G4cout << "PPML > 50"<< ppml[0] << " " << ppml[1] << " " << ppml[2] << " " <<ppml[3] << " " << G4endl;
>> 624
652 xi = 3.0; 625 xi = 3.0;
653 xe0 = Encu(p0l, p0t, xi); 626 xe0 = Encu(p0l, p0t, xi);
>> 627 //G4cout << "ENCU1 "<< xe0 << G4endl;
654 xepm = Encu(ppml, ppmt, xi); 628 xepm = Encu(ppml, ppmt, xi);
>> 629 //G4cout << "ENCU2 "<< xepm << G4endl;
655 } 630 }
656 else 631 else
657 { 632 {
658 const G4double ay00 = 2.82, by00 = 6.35; 633 const G4double ay00 = 2.82, by00 = 6.35;
659 const G4double aa00 = -1.75, ba00 = 0.25 634 const G4double aa00 = -1.75, ba00 = 0.25;
660 635
661 const G4double aw0 = 0.028, bw0 = 5., cw 636 const G4double aw0 = 0.028, bw0 = 5., cw0 = -50.;
662 const G4double axc0 = 3.14213, bxc0 = -2 637 const G4double axc0 = 3.14213, bxc0 = -2.3, cxc0 = 5.7;
663 const G4double ay0p = 1.56, by0p = 3.6; 638 const G4double ay0p = 1.56, by0p = 3.6;
664 const G4double aap = 0.86, bap = 8.3E-3; 639 const G4double aap = 0.86, bap = 8.3E-3;
665 const G4double awp = 0.022, bwp = 7.4, c 640 const G4double awp = 0.022, bwp = 7.4, cwp = -51.;
666 const G4double xcp = 3.1486; 641 const G4double xcp = 3.1486;
667 642
668 p0l[0] = Fln(ay00, by00, Ene); 643 p0l[0] = Fln(ay00, by00, Ene);
669 p0l[1] = aa00+pow(Ene, ba00); 644 p0l[1] = aa00+pow(Ene, ba00);
670 p0l[2] = Poli(aw0, bw0, cw0, Ene); 645 p0l[2] = Poli(aw0, bw0, cw0, Ene);
671 p0l[3] = Poli(axc0, bxc0, cxc0, Ene); 646 p0l[3] = Poli(axc0, bxc0, cxc0, Ene);
672 ppml[0] = Fln(ay0p, by0p, Ene); 647 ppml[0] = Fln(ay0p, by0p, Ene);
673 ppml[1] = aap + bap*(Ene); 648 ppml[1] = aap + bap*(Ene);
674 ppml[2] = Poli(awp, bwp, cwp, Ene); 649 ppml[2] = Poli(awp, bwp, cwp, Ene);
675 ppml[3] = xcp; 650 ppml[3] = xcp;
>> 651
676 } 652 }
677 653
678 G4double a,b=0.; 654 G4double a,b=0.;
679 655
680 if (Ene>=50.) 656 if (Ene>=50.)
681 { 657 {
682 if (PhiLocal>xepm) 658 if (PhiLocal>xepm)
683 { 659 {
684 b = (ppml[0]+2*ppml[1]*ppml[2]*Flor( 660 b = (ppml[0]+2*ppml[1]*ppml[2]*Flor(ppml,PhiLocal));
685 } 661 }
686 else 662 else
687 { 663 {
688 b = Ftan(ppmt,PhiLocal); 664 b = Ftan(ppmt,PhiLocal);
689 } 665 }
690 if (PhiLocal>xe0) 666 if (PhiLocal>xe0)
691 { 667 {
692 a = (p0l[0]+2*p0l[1]*p0l[2]*Flor(p0l 668 a = (p0l[0]+2*p0l[1]*p0l[2]*Flor(p0l,PhiLocal));
693 } 669 }
694 else 670 else
695 { 671 {
696 a = Ftan(p0t,PhiLocal); 672 a = Ftan(p0t,PhiLocal);
697 } 673 }
698 } 674 }
699 else 675 else
700 { 676 {
701 b = (ppml[0]+2*ppml[1]*ppml[2]*Flor(ppml 677 b = (ppml[0]+2*ppml[1]*ppml[2]*Flor(ppml,PhiLocal));
702 a = (p0l[0]+2*p0l[1]*p0l[2]*Flor(p0l,Phi 678 a = (p0l[0]+2*p0l[1]*p0l[2]*Flor(p0l,PhiLocal));
703 } 679 }
704 G4double nr =0.; 680 G4double nr =0.;
705 681
706 if (b>a) 682 if (b>a)
707 { 683 {
708 nr = 1./b; 684 nr = 1./b;
709 } 685 }
710 else 686 else
711 { 687 {
712 nr = 1./a; 688 nr = 1./a;
713 } 689 }
714 690
715 G4double r1,r2=0.; 691 G4double r1,r2=0.;
716 G4double r3 =-1.; 692 G4double r3 =-1.;
717 do 693 do
718 { 694 {
719 r1 = G4UniformRand(); 695 r1 = G4UniformRand();
720 r2 = G4UniformRand(); 696 r2 = G4UniformRand();
721 //value = r2*pi; << 697 value = r2*pi;
722 value = 2.*r2*pi; <<
723 r3 = nr*(a*cos(value)*cos(value) + b*sin 698 r3 = nr*(a*cos(value)*cos(value) + b*sin(value)*sin(value));
724 }while(r1>r3); 699 }while(r1>r3);
725 700
726 return value; 701 return value;
727 } 702 }
728 703
729 //....oooOO0OOooo........oooOO0OOooo........oo <<
730 704
731 G4double G4LivermorePolarizedGammaConversionMo 705 G4double G4LivermorePolarizedGammaConversionModel::Poli
732 (G4double a, G4double b, G4double c, G4double 706 (G4double a, G4double b, G4double c, G4double x)
733 { 707 {
734 G4double value=0.; 708 G4double value=0.;
735 if(x>0.) 709 if(x>0.)
736 { 710 {
737 value =(a + b/x + c/(x*x*x)); 711 value =(a + b/x + c/(x*x*x));
738 } 712 }
739 else 713 else
740 { 714 {
741 //G4cout << "ERROR in Poli! " << G4endl; 715 //G4cout << "ERROR in Poli! " << G4endl;
742 } 716 }
743 return value; 717 return value;
744 } 718 }
745 <<
746 //....oooOO0OOooo........oooOO0OOooo........oo <<
747 <<
748 G4double G4LivermorePolarizedGammaConversionMo 719 G4double G4LivermorePolarizedGammaConversionModel::Fln
749 (G4double a, G4double b, G4double x) 720 (G4double a, G4double b, G4double x)
750 { 721 {
751 G4double value=0.; 722 G4double value=0.;
752 if(x>0.) 723 if(x>0.)
753 { 724 {
754 value =(a*log(x)-b); 725 value =(a*log(x)-b);
755 } 726 }
756 else 727 else
757 { 728 {
758 //G4cout << "ERROR in Fln! " << G4endl; 729 //G4cout << "ERROR in Fln! " << G4endl;
759 } 730 }
760 return value; 731 return value;
761 } 732 }
762 733
763 //....oooOO0OOooo........oooOO0OOooo........oo <<
764 734
765 G4double G4LivermorePolarizedGammaConversionMo 735 G4double G4LivermorePolarizedGammaConversionModel::Encu
766 (G4double* p_p1, G4double* p_p2, G4double x0) 736 (G4double* p_p1, G4double* p_p2, G4double x0)
767 { 737 {
768 G4int i=0; 738 G4int i=0;
769 G4double fx = 1.; 739 G4double fx = 1.;
770 G4double x = x0; 740 G4double x = x0;
771 const G4double xmax = 3.0; 741 const G4double xmax = 3.0;
772 742
773 for(i=0; i<100; ++i) 743 for(i=0; i<100; ++i)
774 { 744 {
775 fx = (Flor(p_p1,x)*Glor(p_p1,x) - Ftan(p 745 fx = (Flor(p_p1,x)*Glor(p_p1,x) - Ftan(p_p2, x))/
776 (Fdlor(p_p1,x) - Fdtan(p_p2,x)); 746 (Fdlor(p_p1,x) - Fdtan(p_p2,x));
777 x -= fx; 747 x -= fx;
778 if(x > xmax) { return xmax; } 748 if(x > xmax) { return xmax; }
>> 749 // x -= (Flor(p_p1, x)*Glor(p_p1,x) - Ftan(p_p2, x))/
>> 750 // (Fdlor(p_p1,x) - Fdtan(p_p2,x));
>> 751 // fx = Flor(p_p1,x)*Glor(p_p1,x) - Ftan(p_p2, x);
>> 752 // G4cout << std::fabs(fx) << " " << i << " " << x << "dentro ENCU " << G4endl;
779 if(std::fabs(fx) <= x*1.0e-6) { break; } 753 if(std::fabs(fx) <= x*1.0e-6) { break; }
780 } 754 }
781 755
782 if(x < 0.0) { x = 0.0; } 756 if(x < 0.0) { x = 0.0; }
783 return x; 757 return x;
784 } 758 }
785 759
786 //....oooOO0OOooo........oooOO0OOooo........oo <<
787 760
788 G4double G4LivermorePolarizedGammaConversionMo 761 G4double G4LivermorePolarizedGammaConversionModel::Flor(G4double* p_p1, G4double x)
789 { 762 {
790 G4double value =0.; 763 G4double value =0.;
>> 764 // G4double y0 = p_p1[0];
>> 765 // G4double A = p_p1[1];
791 G4double w = p_p1[2]; 766 G4double w = p_p1[2];
792 G4double xc = p_p1[3]; 767 G4double xc = p_p1[3];
793 768
794 value = 1./(pi*(w*w + 4.*(x-xc)*(x-xc))); 769 value = 1./(pi*(w*w + 4.*(x-xc)*(x-xc)));
795 return value; 770 return value;
796 } 771 }
797 772
798 //....oooOO0OOooo........oooOO0OOooo........oo <<
799 773
800 G4double G4LivermorePolarizedGammaConversionMo 774 G4double G4LivermorePolarizedGammaConversionModel::Glor(G4double* p_p1, G4double x)
801 { 775 {
802 G4double value =0.; 776 G4double value =0.;
803 G4double y0 = p_p1[0]; 777 G4double y0 = p_p1[0];
804 G4double A = p_p1[1]; 778 G4double A = p_p1[1];
805 G4double w = p_p1[2]; 779 G4double w = p_p1[2];
806 G4double xc = p_p1[3]; 780 G4double xc = p_p1[3];
807 781
808 value = (y0 *pi*(w*w + 4.*(x-xc)*(x-xc)) + 782 value = (y0 *pi*(w*w + 4.*(x-xc)*(x-xc)) + 2.*A*w);
809 return value; 783 return value;
810 } 784 }
811 785
812 //....oooOO0OOooo........oooOO0OOooo........oo <<
813 786
814 G4double G4LivermorePolarizedGammaConversionMo 787 G4double G4LivermorePolarizedGammaConversionModel::Fdlor(G4double* p_p1, G4double x)
815 { 788 {
816 G4double value =0.; 789 G4double value =0.;
>> 790 //G4double y0 = p_p1[0];
817 G4double A = p_p1[1]; 791 G4double A = p_p1[1];
818 G4double w = p_p1[2]; 792 G4double w = p_p1[2];
819 G4double xc = p_p1[3]; 793 G4double xc = p_p1[3];
820 794
821 value = (-16.*A*w*(x-xc))/ 795 value = (-16.*A*w*(x-xc))/
822 (pi*(w*w+4.*(x-xc)*(x-xc))*(w*w+4.*(x-xc)* 796 (pi*(w*w+4.*(x-xc)*(x-xc))*(w*w+4.*(x-xc)*(x-xc)));
823 return value; 797 return value;
824 } 798 }
825 799
826 //....oooOO0OOooo........oooOO0OOooo........oo <<
827 800
828 G4double G4LivermorePolarizedGammaConversionMo 801 G4double G4LivermorePolarizedGammaConversionModel::Fintlor(G4double* p_p1, G4double x)
829 { 802 {
830 G4double value =0.; 803 G4double value =0.;
831 G4double y0 = p_p1[0]; 804 G4double y0 = p_p1[0];
832 G4double A = p_p1[1]; 805 G4double A = p_p1[1];
833 G4double w = p_p1[2]; 806 G4double w = p_p1[2];
834 G4double xc = p_p1[3]; 807 G4double xc = p_p1[3];
835 808
836 value = y0*x + A*atan( 2*(x-xc)/w) / pi; 809 value = y0*x + A*atan( 2*(x-xc)/w) / pi;
837 return value; 810 return value;
838 } 811 }
839 812
840 813
841 G4double G4LivermorePolarizedGammaConversionMo 814 G4double G4LivermorePolarizedGammaConversionModel::Finvlor(G4double* p_p1, G4double x, G4double r)
842 { 815 {
843 G4double value = 0.; 816 G4double value = 0.;
844 G4double nor = 0.; 817 G4double nor = 0.;
>> 818 //G4double y0 = p_p1[0];
>> 819 // G4double A = p_p1[1];
845 G4double w = p_p1[2]; 820 G4double w = p_p1[2];
846 G4double xc = p_p1[3]; 821 G4double xc = p_p1[3];
847 822
848 nor = atan(2.*(pi-xc)/w)/(2.*pi*w) - atan(2. 823 nor = atan(2.*(pi-xc)/w)/(2.*pi*w) - atan(2.*(x-xc)/w)/(2.*pi*w);
849 value = xc - (w/2.)*tan(-2.*r*nor*pi*w+atan( 824 value = xc - (w/2.)*tan(-2.*r*nor*pi*w+atan(2*(xc-x)/w));
850 825
851 return value; 826 return value;
852 } 827 }
853 828
854 //....oooOO0OOooo........oooOO0OOooo........oo <<
855 829
856 G4double G4LivermorePolarizedGammaConversionMo 830 G4double G4LivermorePolarizedGammaConversionModel::Ftan(G4double* p_p1, G4double x)
857 { 831 {
858 G4double value =0.; 832 G4double value =0.;
859 G4double a = p_p1[0]; 833 G4double a = p_p1[0];
860 G4double b = p_p1[1]; 834 G4double b = p_p1[1];
861 835
862 value = a /(x-b); 836 value = a /(x-b);
863 return value; 837 return value;
864 } 838 }
865 839
866 //....oooOO0OOooo........oooOO0OOooo........oo <<
867 840
868 G4double G4LivermorePolarizedGammaConversionMo 841 G4double G4LivermorePolarizedGammaConversionModel::Fdtan(G4double* p_p1, G4double x)
869 { 842 {
870 G4double value =0.; 843 G4double value =0.;
871 G4double a = p_p1[0]; 844 G4double a = p_p1[0];
872 G4double b = p_p1[1]; 845 G4double b = p_p1[1];
873 846
874 value = -1.*a / ((x-b)*(x-b)); 847 value = -1.*a / ((x-b)*(x-b));
875 return value; 848 return value;
876 } 849 }
877 850
878 //....oooOO0OOooo........oooOO0OOooo........oo <<
879 851
880 G4double G4LivermorePolarizedGammaConversionMo 852 G4double G4LivermorePolarizedGammaConversionModel::Finttan(G4double* p_p1, G4double x)
881 { 853 {
882 G4double value =0.; 854 G4double value =0.;
883 G4double a = p_p1[0]; 855 G4double a = p_p1[0];
884 G4double b = p_p1[1]; 856 G4double b = p_p1[1];
885 857
>> 858
886 value = a*log(b-x); 859 value = a*log(b-x);
887 return value; 860 return value;
888 } 861 }
889 862
890 //....oooOO0OOooo........oooOO0OOooo........oo <<
891 863
892 G4double G4LivermorePolarizedGammaConversionMo 864 G4double G4LivermorePolarizedGammaConversionModel::Finvtan(G4double* p_p1, G4double cnor, G4double r)
893 { 865 {
894 G4double value =0.; 866 G4double value =0.;
895 G4double a = p_p1[0]; 867 G4double a = p_p1[0];
896 G4double b = p_p1[1]; 868 G4double b = p_p1[1];
897 869
898 value = b*(1-G4Exp(r*cnor/a)); << 870 value = b*(1-exp(r*cnor/a));
899 871
900 return value; 872 return value;
901 } 873 }
902 874
>> 875
>> 876
>> 877
903 //....oooOO0OOooo........oooOO0OOooo........oo 878 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
904 879
905 G4ThreeVector G4LivermorePolarizedGammaConvers 880 G4ThreeVector G4LivermorePolarizedGammaConversionModel::SetPerpendicularVector(G4ThreeVector& a)
906 { 881 {
907 G4double dx = a.x(); 882 G4double dx = a.x();
908 G4double dy = a.y(); 883 G4double dy = a.y();
909 G4double dz = a.z(); 884 G4double dz = a.z();
910 G4double x = dx < 0.0 ? -dx : dx; 885 G4double x = dx < 0.0 ? -dx : dx;
911 G4double y = dy < 0.0 ? -dy : dy; 886 G4double y = dy < 0.0 ? -dy : dy;
912 G4double z = dz < 0.0 ? -dz : dz; 887 G4double z = dz < 0.0 ? -dz : dz;
913 if (x < y) { 888 if (x < y) {
914 return x < z ? G4ThreeVector(-dy,dx,0) : G 889 return x < z ? G4ThreeVector(-dy,dx,0) : G4ThreeVector(0,-dz,dy);
915 }else{ 890 }else{
916 return y < z ? G4ThreeVector(dz,0,-dx) : G 891 return y < z ? G4ThreeVector(dz,0,-dx) : G4ThreeVector(-dy,dx,0);
917 } 892 }
918 } 893 }
919 894
920 //....oooOO0OOooo........oooOO0OOooo........oo 895 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
921 896
922 G4ThreeVector G4LivermorePolarizedGammaConvers 897 G4ThreeVector G4LivermorePolarizedGammaConversionModel::GetRandomPolarization(G4ThreeVector& direction0)
923 { 898 {
924 G4ThreeVector d0 = direction0.unit(); 899 G4ThreeVector d0 = direction0.unit();
925 G4ThreeVector a1 = SetPerpendicularVector(d0 900 G4ThreeVector a1 = SetPerpendicularVector(d0); //different orthogonal
926 G4ThreeVector a0 = a1.unit(); // unit vector 901 G4ThreeVector a0 = a1.unit(); // unit vector
927 902
928 G4double rand1 = G4UniformRand(); 903 G4double rand1 = G4UniformRand();
929 904
930 G4double angle = twopi*rand1; // random pola 905 G4double angle = twopi*rand1; // random polar angle
931 G4ThreeVector b0 = d0.cross(a0); // cross pr 906 G4ThreeVector b0 = d0.cross(a0); // cross product
932 907
933 G4ThreeVector c; 908 G4ThreeVector c;
934 909
935 c.setX(std::cos(angle)*(a0.x())+std::sin(ang 910 c.setX(std::cos(angle)*(a0.x())+std::sin(angle)*b0.x());
936 c.setY(std::cos(angle)*(a0.y())+std::sin(ang 911 c.setY(std::cos(angle)*(a0.y())+std::sin(angle)*b0.y());
937 c.setZ(std::cos(angle)*(a0.z())+std::sin(ang 912 c.setZ(std::cos(angle)*(a0.z())+std::sin(angle)*b0.z());
938 913
939 G4ThreeVector c0 = c.unit(); 914 G4ThreeVector c0 = c.unit();
940 915
941 return c0; << 916 return c0;
>> 917
942 } 918 }
943 919
944 //....oooOO0OOooo........oooOO0OOooo........oo 920 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
945 921
946 G4ThreeVector G4LivermorePolarizedGammaConvers 922 G4ThreeVector G4LivermorePolarizedGammaConversionModel::GetPerpendicularPolarization
947 (const G4ThreeVector& gammaDirection, const G4 923 (const G4ThreeVector& gammaDirection, const G4ThreeVector& gammaPolarization) const
948 { 924 {
>> 925
949 // 926 //
950 // The polarization of a photon is always pe 927 // The polarization of a photon is always perpendicular to its momentum direction.
951 // Therefore this function removes those vec 928 // Therefore this function removes those vector component of gammaPolarization, which
952 // points in direction of gammaDirection 929 // points in direction of gammaDirection
953 // 930 //
954 // Mathematically we search the projection o 931 // Mathematically we search the projection of the vector a on the plane E, where n is the
955 // plains normal vector. 932 // plains normal vector.
956 // The basic equation can be found in each g 933 // The basic equation can be found in each geometry book (e.g. Bronstein):
957 // p = a - (a o n)/(n o n)*n 934 // p = a - (a o n)/(n o n)*n
958 935
959 return gammaPolarization - gammaPolarization 936 return gammaPolarization - gammaPolarization.dot(gammaDirection)/gammaDirection.dot(gammaDirection) * gammaDirection;
960 } 937 }
961 938
962 //....oooOO0OOooo........oooOO0OOooo........oo 939 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
963 940
>> 941
964 void G4LivermorePolarizedGammaConversionModel: 942 void G4LivermorePolarizedGammaConversionModel::SystemOfRefChange
965 (G4ThreeVector& direction0,G4ThreeVector& 943 (G4ThreeVector& direction0,G4ThreeVector& direction1,
966 G4ThreeVector& polarization0) 944 G4ThreeVector& polarization0)
967 { 945 {
968 // direction0 is the original photon directi 946 // direction0 is the original photon direction ---> z
969 // polarization0 is the original photon pola 947 // polarization0 is the original photon polarization ---> x
970 // need to specify y axis in the real refere 948 // need to specify y axis in the real reference frame ---> y
971 G4ThreeVector Axis_Z0 = direction0.unit(); 949 G4ThreeVector Axis_Z0 = direction0.unit();
972 G4ThreeVector Axis_X0 = polarization0.unit() 950 G4ThreeVector Axis_X0 = polarization0.unit();
973 G4ThreeVector Axis_Y0 = (Axis_Z0.cross(Axis_ 951 G4ThreeVector Axis_Y0 = (Axis_Z0.cross(Axis_X0)).unit(); // to be confirmed;
974 952
975 G4double direction_x = direction1.getX(); 953 G4double direction_x = direction1.getX();
976 G4double direction_y = direction1.getY(); 954 G4double direction_y = direction1.getY();
977 G4double direction_z = direction1.getZ(); 955 G4double direction_z = direction1.getZ();
978 956
979 direction1 = (direction_x*Axis_X0 + directio << 957 direction1 = (direction_x*Axis_X0 + direction_y*Axis_Y0 + direction_z*Axis_Z0).unit();
>> 958
980 } 959 }
981 960
982 //....oooOO0OOooo........oooOO0OOooo........oo <<
983 961
984 void G4LivermorePolarizedGammaConversionModel: << 962
985 const G4ParticleDefiniti << 963
986 G4int Z) <<
987 { <<
988 G4AutoLock l(&LivermorePolarizedGammaConvers <<
989 if(!data[Z]) { ReadData(Z); } <<
990 l.unlock(); <<
991 } <<
992 964