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>> 26 // $Id: G4LivermorePolarizedGammaConversionModel.hh,v 1.2 2010-11-23 16:42:15 flongo Exp $
26 // 27 //
27 // Authors: G.Depaola & F.Longo 28 // Authors: G.Depaola & F.Longo
28 // 29 //
29 // 30 //
30 31
31 #include "G4LivermorePolarizedGammaConversionM 32 #include "G4LivermorePolarizedGammaConversionModel.hh"
32 #include "G4PhysicalConstants.hh" 33 #include "G4PhysicalConstants.hh"
33 #include "G4SystemOfUnits.hh" 34 #include "G4SystemOfUnits.hh"
34 #include "G4Electron.hh" 35 #include "G4Electron.hh"
35 #include "G4Positron.hh" 36 #include "G4Positron.hh"
36 #include "G4ParticleChangeForGamma.hh" 37 #include "G4ParticleChangeForGamma.hh"
37 #include "G4Log.hh" 38 #include "G4Log.hh"
38 #include "G4AutoLock.hh" <<
39 #include "G4Exp.hh" 39 #include "G4Exp.hh"
40 #include "G4ProductionCutsTable.hh" 40 #include "G4ProductionCutsTable.hh"
41 41
42 //....oooOO0OOooo........oooOO0OOooo........oo 42 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
43 43
44 using namespace std; 44 using namespace std;
45 namespace { G4Mutex LivermorePolarizedGammaCon <<
46 45
47 G4PhysicsFreeVector* G4LivermorePolarizedGamma << 46 G4int G4LivermorePolarizedGammaConversionModel::maxZ = 99;
>> 47 G4LPhysicsFreeVector* G4LivermorePolarizedGammaConversionModel::data[] = {0};
48 48
49 //....oooOO0OOooo........oooOO0OOooo........oo 49 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
50 50
51 G4LivermorePolarizedGammaConversionModel::G4Li 51 G4LivermorePolarizedGammaConversionModel::G4LivermorePolarizedGammaConversionModel(
52 const G4ParticleDefinition*, const G4String 52 const G4ParticleDefinition*, const G4String& nam)
53 :G4VEmModel(nam), smallEnergy(2.*MeV), isIni << 53 :G4VEmModel(nam), isInitialised(false),smallEnergy(2.*MeV)
54 { 54 {
55 fParticleChange = nullptr; 55 fParticleChange = nullptr;
56 lowEnergyLimit = 2*electron_mass_c2; 56 lowEnergyLimit = 2*electron_mass_c2;
57 57
58 Phi=0.; 58 Phi=0.;
59 Psi=0.; 59 Psi=0.;
60 60
61 verboseLevel= 0; 61 verboseLevel= 0;
62 // Verbosity scale: 62 // Verbosity scale:
63 // 0 = nothing 63 // 0 = nothing
64 // 1 = calculation of cross sections, file o 64 // 1 = calculation of cross sections, file openings, samping of atoms
65 // 2 = entering in methods 65 // 2 = entering in methods
66 66
67 if(verboseLevel > 0) { 67 if(verboseLevel > 0) {
68 G4cout << "Livermore Polarized GammaConver 68 G4cout << "Livermore Polarized GammaConversion is constructed "
69 << G4endl; 69 << G4endl;
70 } 70 }
71 71
72 } 72 }
73 73
74 //....oooOO0OOooo........oooOO0OOooo........oo 74 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
75 75
76 G4LivermorePolarizedGammaConversionModel::~G4L 76 G4LivermorePolarizedGammaConversionModel::~G4LivermorePolarizedGammaConversionModel()
77 { 77 {
78 if(IsMaster()) { 78 if(IsMaster()) {
79 for(G4int i=0; i<maxZ; ++i) { 79 for(G4int i=0; i<maxZ; ++i) {
80 if(data[i]) { 80 if(data[i]) {
81 delete data[i]; 81 delete data[i];
82 data[i] = nullptr; << 82 data[i] = 0;
83 } 83 }
84 } 84 }
85 } 85 }
86 } 86 }
87 87
88 //....oooOO0OOooo........oooOO0OOooo........oo 88 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
89 89
90 void G4LivermorePolarizedGammaConversionModel: 90 void G4LivermorePolarizedGammaConversionModel::Initialise(const G4ParticleDefinition* particle,
91 const G 91 const G4DataVector& cuts)
92 { 92 {
93 if (verboseLevel > 1) 93 if (verboseLevel > 1)
94 { 94 {
95 G4cout << "Calling1 G4LivermorePolarized 95 G4cout << "Calling1 G4LivermorePolarizedGammaConversionModel::Initialise()"
96 << G4endl 96 << G4endl
97 << "Energy range: " 97 << "Energy range: "
98 << LowEnergyLimit() / MeV << " MeV - " 98 << LowEnergyLimit() / MeV << " MeV - "
99 << HighEnergyLimit() / GeV << " G 99 << HighEnergyLimit() / GeV << " GeV"
100 << G4endl; 100 << G4endl;
101 } 101 }
102 102
>> 103
103 if(IsMaster()) 104 if(IsMaster())
104 { 105 {
105 // Initialise element selector << 106
>> 107 // Initialise element selector
>> 108
106 InitialiseElementSelectors(particle, cut 109 InitialiseElementSelectors(particle, cuts);
107 110
108 // Access to elements 111 // Access to elements
109 const char* path = G4FindDataDir("G4LEDA << 112
>> 113 char* path = getenv("G4LEDATA");
110 114
111 G4ProductionCutsTable* theCoupleTable = 115 G4ProductionCutsTable* theCoupleTable =
112 G4ProductionCutsTable::GetProductionCutsTabl 116 G4ProductionCutsTable::GetProductionCutsTable();
113 117
114 G4int numOfCouples = (G4int)theCoupleTab << 118 G4int numOfCouples = theCoupleTable->GetTableSize();
115 119
116 for(G4int i=0; i<numOfCouples; ++i) 120 for(G4int i=0; i<numOfCouples; ++i)
117 { 121 {
118 const G4Material* material = 122 const G4Material* material =
119 theCoupleTable->GetMaterialCutsCouple(i) 123 theCoupleTable->GetMaterialCutsCouple(i)->GetMaterial();
120 const G4ElementVector* theElementVector = 124 const G4ElementVector* theElementVector = material->GetElementVector();
121 std::size_t nelm = material->GetNumberOfEl << 125 G4int nelm = material->GetNumberOfElements();
122 126
123 for (std::size_t j=0; j<nelm; ++j) << 127 for (G4int j=0; j<nelm; ++j)
124 { 128 {
125 G4int Z = (G4int)(*theElementVector)[j 129 G4int Z = (G4int)(*theElementVector)[j]->GetZ();
126 if(Z < 1) { Z = 1; } 130 if(Z < 1) { Z = 1; }
127 else if(Z > maxZ) { Z = maxZ; } 131 else if(Z > maxZ) { Z = maxZ; }
128 if(!data[Z]) { ReadData(Z, path); } 132 if(!data[Z]) { ReadData(Z, path); }
129 } 133 }
130 } 134 }
131 } 135 }
132 if(isInitialised) { return; } 136 if(isInitialised) { return; }
133 fParticleChange = GetParticleChangeForGamma( 137 fParticleChange = GetParticleChangeForGamma();
134 isInitialised = true; 138 isInitialised = true;
>> 139
135 } 140 }
136 141
>> 142
137 //....oooOO0OOooo........oooOO0OOooo........oo 143 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
138 144
139 void G4LivermorePolarizedGammaConversionModel: 145 void G4LivermorePolarizedGammaConversionModel::InitialiseLocal(
140 const G4ParticleDefinition*, G4VEmModel* 146 const G4ParticleDefinition*, G4VEmModel* masterModel)
141 { 147 {
142 SetElementSelectors(masterModel->GetElementS 148 SetElementSelectors(masterModel->GetElementSelectors());
143 } 149 }
144 150
145 //....oooOO0OOooo........oooOO0OOooo........oo 151 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
146 152
147 G4double G4LivermorePolarizedGammaConversionMo 153 G4double G4LivermorePolarizedGammaConversionModel::MinPrimaryEnergy(const G4Material*,
148 const G4ParticleDefinition*, G4doub 154 const G4ParticleDefinition*, G4double)
149 { 155 {
150 return lowEnergyLimit; 156 return lowEnergyLimit;
151 } 157 }
152 158
153 //....oooOO0OOooo........oooOO0OOooo........oo 159 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
154 160
155 void G4LivermorePolarizedGammaConversionModel: << 161 void G4LivermorePolarizedGammaConversionModel::ReadData(size_t Z, const char* path)
156 { 162 {
157 if (verboseLevel > 1) 163 if (verboseLevel > 1)
158 { 164 {
159 G4cout << "Calling ReadData() of G4Liver 165 G4cout << "Calling ReadData() of G4LivermorePolarizedGammaConversionModel"
160 << G4endl; 166 << G4endl;
161 } 167 }
162 168
163 if(data[Z]) { return; } 169 if(data[Z]) { return; }
164 170
165 const char* datadir = path; 171 const char* datadir = path;
166 172
167 if(!datadir) 173 if(!datadir)
168 { 174 {
169 datadir = G4FindDataDir("G4LEDATA"); << 175 datadir = getenv("G4LEDATA");
170 if(!datadir) 176 if(!datadir)
171 { 177 {
172 G4Exception("G4LivermorePolarizedGammaConv 178 G4Exception("G4LivermorePolarizedGammaConversionModel::ReadData()",
173 "em0006",FatalException, 179 "em0006",FatalException,
174 "Environment variable G4LEDATA not d 180 "Environment variable G4LEDATA not defined");
175 return; 181 return;
176 } 182 }
177 } 183 }
178 // << 184
179 data[Z] = new G4PhysicsFreeVector(0,/*spline << 185 //
>> 186
>> 187 data[Z] = new G4LPhysicsFreeVector();
>> 188
180 // 189 //
>> 190
181 std::ostringstream ost; 191 std::ostringstream ost;
182 ost << datadir << "/livermore/pair/pp-cs-" < 192 ost << datadir << "/livermore/pair/pp-cs-" << Z <<".dat";
183 std::ifstream fin(ost.str().c_str()); 193 std::ifstream fin(ost.str().c_str());
184 194
185 if( !fin.is_open()) 195 if( !fin.is_open())
186 { 196 {
187 G4ExceptionDescription ed; 197 G4ExceptionDescription ed;
188 ed << "G4LivermorePolarizedGammaConversi 198 ed << "G4LivermorePolarizedGammaConversionModel data file <" << ost.str().c_str()
189 << "> is not opened!" << G4endl; 199 << "> is not opened!" << G4endl;
190 G4Exception("G4LivermorePolarizedGammaCo 200 G4Exception("G4LivermorePolarizedGammaConversionModel::ReadData()",
191 "em0003",FatalException, 201 "em0003",FatalException,
192 ed,"G4LEDATA version should be G4EMLOW6. 202 ed,"G4LEDATA version should be G4EMLOW6.27 or later.");
193 return; 203 return;
194 } 204 }
195 else 205 else
196 { 206 {
197 207
198 if(verboseLevel > 3) { G4cout << "File " 208 if(verboseLevel > 3) { G4cout << "File " << ost.str()
199 << " is opened by G4LivermorePolar 209 << " is opened by G4LivermorePolarizedGammaConversionModel" << G4endl;}
200 210
201 data[Z]->Retrieve(fin, true); 211 data[Z]->Retrieve(fin, true);
202 } 212 }
203 213
204 // Activation of spline interpolation 214 // Activation of spline interpolation
205 data[Z]->FillSecondDerivatives(); << 215 data[Z] ->SetSpline(true);
206 216
207 } 217 }
208 218
209 //....oooOO0OOooo........oooOO0OOooo........oo 219 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
210 220
211 G4double G4LivermorePolarizedGammaConversionMo 221 G4double G4LivermorePolarizedGammaConversionModel::ComputeCrossSectionPerAtom(
212 const G 222 const G4ParticleDefinition*,
213 G4double GammaEnergy, 223 G4double GammaEnergy,
214 G4double Z, G4double, 224 G4double Z, G4double,
215 G4double, G4double) 225 G4double, G4double)
216 { 226 {
217 if (verboseLevel > 1) { 227 if (verboseLevel > 1) {
218 G4cout << "G4LivermorePolarizedGammaConver 228 G4cout << "G4LivermorePolarizedGammaConversionModel::ComputeCrossSectionPerAtom()"
219 << G4endl; 229 << G4endl;
220 } 230 }
221 if (GammaEnergy < lowEnergyLimit) { return 0 231 if (GammaEnergy < lowEnergyLimit) { return 0.0; }
222 232
223 G4double xs = 0.0; 233 G4double xs = 0.0;
224 234
225 G4int intZ=G4int(Z); 235 G4int intZ=G4int(Z);
226 236
227 if(intZ < 1 || intZ > maxZ) { return xs; } 237 if(intZ < 1 || intZ > maxZ) { return xs; }
228 238
229 G4PhysicsFreeVector* pv = data[intZ]; << 239 G4LPhysicsFreeVector* pv = data[intZ];
230 240
231 // if element was not initialised 241 // if element was not initialised
232 // do initialisation safely for MT mode 242 // do initialisation safely for MT mode
233 if(!pv) 243 if(!pv)
234 { 244 {
235 InitialiseForElement(0, intZ); 245 InitialiseForElement(0, intZ);
236 pv = data[intZ]; 246 pv = data[intZ];
237 if(!pv) { return xs; } 247 if(!pv) { return xs; }
238 } 248 }
239 // x-section is taken from the table 249 // x-section is taken from the table
240 xs = pv->Value(GammaEnergy); 250 xs = pv->Value(GammaEnergy);
241 251
242 if(verboseLevel > 0) 252 if(verboseLevel > 0)
243 { 253 {
244 G4int n = G4int(pv->GetVectorLength() - << 254 G4int n = pv->GetVectorLength() - 1;
245 G4cout << "****** DEBUG: tcs value for 255 G4cout << "****** DEBUG: tcs value for Z=" << Z << " at energy (MeV)="
246 << GammaEnergy/MeV << G4endl; 256 << GammaEnergy/MeV << G4endl;
247 G4cout << " cs (Geant4 internal unit) 257 G4cout << " cs (Geant4 internal unit)=" << xs << G4endl;
248 G4cout << " -> first cs value in EA 258 G4cout << " -> first cs value in EADL data file (iu) =" << (*pv)[0] << G4endl;
249 G4cout << " -> last cs value in EA 259 G4cout << " -> last cs value in EADL data file (iu) =" << (*pv)[n] << G4endl;
250 G4cout << "*************************** 260 G4cout << "*********************************************************" << G4endl;
251 } 261 }
252 262
253 return xs; 263 return xs;
254 } 264 }
255 265
256 //....oooOO0OOooo........oooOO0OOooo........oo 266 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
257 267
258 void 268 void
259 G4LivermorePolarizedGammaConversionModel::Samp 269 G4LivermorePolarizedGammaConversionModel::SampleSecondaries(std::vector<G4DynamicParticle*>* fvect,
260 const G4MaterialCutsCouple* 270 const G4MaterialCutsCouple* couple,
261 const G4DynamicParticle* aDy 271 const G4DynamicParticle* aDynamicGamma,
262 G4double, 272 G4double,
263 G4double) 273 G4double)
264 { 274 {
265 275
266 // Fluorescence generated according to: 276 // Fluorescence generated according to:
267 // J. Stepanek ,"A program to determine the 277 // J. Stepanek ,"A program to determine the radiation spectra due to a single atomic
268 // subshell ionisation by a particle or due 278 // subshell ionisation by a particle or due to deexcitation or decay of radionuclides",
269 // Comp. Phys. Comm. 1206 pp 1-1-9 (1997) 279 // Comp. Phys. Comm. 1206 pp 1-1-9 (1997)
>> 280
270 if (verboseLevel > 3) 281 if (verboseLevel > 3)
271 G4cout << "Calling SampleSecondaries() of 282 G4cout << "Calling SampleSecondaries() of G4LivermorePolarizedGammaConversionModel" << G4endl;
272 283
273 G4double photonEnergy = aDynamicGamma->GetKi 284 G4double photonEnergy = aDynamicGamma->GetKineticEnergy();
>> 285 // Within energy limit?
274 286
275 if(photonEnergy <= lowEnergyLimit) 287 if(photonEnergy <= lowEnergyLimit)
276 { 288 {
277 fParticleChange->ProposeTrackStatus(fSto 289 fParticleChange->ProposeTrackStatus(fStopAndKill);
278 fParticleChange->SetProposedKineticEnerg 290 fParticleChange->SetProposedKineticEnergy(0.);
279 return; 291 return;
280 } 292 }
281 293
>> 294
282 G4ThreeVector gammaPolarization0 = aDynamicG 295 G4ThreeVector gammaPolarization0 = aDynamicGamma->GetPolarization();
283 G4ThreeVector gammaDirection0 = aDynamicGamm 296 G4ThreeVector gammaDirection0 = aDynamicGamma->GetMomentumDirection();
284 297
285 // Make sure that the polarization vector is 298 // Make sure that the polarization vector is perpendicular to the
286 // gamma direction. If not 299 // gamma direction. If not
>> 300
287 if(!(gammaPolarization0.isOrthogonal(gammaDi 301 if(!(gammaPolarization0.isOrthogonal(gammaDirection0, 1e-6))||(gammaPolarization0.mag()==0))
288 { // only for testing now 302 { // only for testing now
289 gammaPolarization0 = GetRandomPolarizati 303 gammaPolarization0 = GetRandomPolarization(gammaDirection0);
290 } 304 }
291 else 305 else
292 { 306 {
293 if ( gammaPolarization0.howOrthogonal(ga 307 if ( gammaPolarization0.howOrthogonal(gammaDirection0) != 0)
294 { 308 {
295 gammaPolarization0 = GetPerpendicularPolar 309 gammaPolarization0 = GetPerpendicularPolarization(gammaDirection0, gammaPolarization0);
296 } 310 }
297 } 311 }
298 312
299 // End of Protection 313 // End of Protection
300 314
>> 315
301 G4double epsilon ; 316 G4double epsilon ;
302 G4double epsilon0Local = electron_mass_c2 / 317 G4double epsilon0Local = electron_mass_c2 / photonEnergy ;
303 318
304 // Do it fast if photon energy < 2. MeV 319 // Do it fast if photon energy < 2. MeV
305 320
306 if (photonEnergy < smallEnergy ) 321 if (photonEnergy < smallEnergy )
307 { 322 {
308 epsilon = epsilon0Local + (0.5 - epsilon 323 epsilon = epsilon0Local + (0.5 - epsilon0Local) * G4UniformRand();
309 } 324 }
310 else 325 else
311 { 326 {
312 // Select randomly one element in the cu << 327
>> 328 // Select randomly one element in the current material
>> 329
313 const G4ParticleDefinition* particle = 330 const G4ParticleDefinition* particle = aDynamicGamma->GetDefinition();
314 const G4Element* element = SelectRandomA 331 const G4Element* element = SelectRandomAtom(couple,particle,photonEnergy);
315 332
316 if (element == nullptr) << 333
>> 334 if (element == 0)
317 { 335 {
318 G4cout << "G4LivermorePolarizedGamma 336 G4cout << "G4LivermorePolarizedGammaConversionModel::SampleSecondaries - element = 0" << G4endl;
319 return; 337 return;
320 } 338 }
321 339
322 340
323 G4IonisParamElm* ionisation = element->G << 341 G4IonisParamElm* ionisation = element->GetIonisation();
324 if (ionisation == nullptr) << 342
>> 343 if (ionisation == 0)
325 { 344 {
326 G4cout << "G4LivermorePolarizedGamma 345 G4cout << "G4LivermorePolarizedGammaConversionModel::SampleSecondaries - ionisation = 0" << G4endl;
327 return; 346 return;
328 } 347 }
329 348
330 // Extract Coulomb factor for this Eleme 349 // Extract Coulomb factor for this Element
>> 350
331 G4double fZ = 8. * (ionisation->GetlogZ3 351 G4double fZ = 8. * (ionisation->GetlogZ3());
332 if (photonEnergy > 50. * MeV) fZ += 8. * 352 if (photonEnergy > 50. * MeV) fZ += 8. * (element->GetfCoulomb());
333 353
334 // Limits of the screening variable 354 // Limits of the screening variable
335 G4double screenFactor = 136. * epsilon0L 355 G4double screenFactor = 136. * epsilon0Local / (element->GetIonisation()->GetZ3()) ;
336 G4double screenMax = G4Exp ((42.24 - fZ) 356 G4double screenMax = G4Exp ((42.24 - fZ)/8.368) - 0.952 ;
337 G4double screenMin = std::min(4.*screenF 357 G4double screenMin = std::min(4.*screenFactor,screenMax) ;
338 358
339 // Limits of the energy sampling 359 // Limits of the energy sampling
340 G4double epsilon1 = 0.5 - 0.5 * sqrt(1. 360 G4double epsilon1 = 0.5 - 0.5 * sqrt(1. - screenMin / screenMax) ;
341 G4double epsilonMin = std::max(epsilon0L 361 G4double epsilonMin = std::max(epsilon0Local,epsilon1);
342 G4double epsilonRange = 0.5 - epsilonMin 362 G4double epsilonRange = 0.5 - epsilonMin ;
343 363
344 // Sample the energy rate of the created 364 // Sample the energy rate of the created electron (or positron)
345 G4double screen; 365 G4double screen;
346 G4double gReject ; 366 G4double gReject ;
347 367
348 G4double f10 = ScreenFunction1(screenMin 368 G4double f10 = ScreenFunction1(screenMin) - fZ;
349 G4double f20 = ScreenFunction2(screenMin 369 G4double f20 = ScreenFunction2(screenMin) - fZ;
350 G4double normF1 = std::max(f10 * epsilon 370 G4double normF1 = std::max(f10 * epsilonRange * epsilonRange,0.);
351 G4double normF2 = std::max(1.5 * f20,0.) 371 G4double normF2 = std::max(1.5 * f20,0.);
352 372
353 do { 373 do {
354 if (normF1 / (normF1 + normF2) > G4Uni 374 if (normF1 / (normF1 + normF2) > G4UniformRand() )
355 { 375 {
356 epsilon = 0.5 - epsilonRange * pow 376 epsilon = 0.5 - epsilonRange * pow(G4UniformRand(), 0.3333) ;
357 screen = screenFactor / (epsilon * 377 screen = screenFactor / (epsilon * (1. - epsilon));
358 gReject = (ScreenFunction1(screen) 378 gReject = (ScreenFunction1(screen) - fZ) / f10 ;
359 } 379 }
360 else 380 else
361 { 381 {
362 epsilon = epsilonMin + epsilonRang 382 epsilon = epsilonMin + epsilonRange * G4UniformRand();
363 screen = screenFactor / (epsilon * 383 screen = screenFactor / (epsilon * (1 - epsilon));
364 gReject = (ScreenFunction2(screen) 384 gReject = (ScreenFunction2(screen) - fZ) / f20 ;
>> 385
>> 386
365 } 387 }
366 } while ( gReject < G4UniformRand() ); 388 } while ( gReject < G4UniformRand() );
>> 389
367 } // End of epsilon sampling 390 } // End of epsilon sampling
368 391
369 // Fix charges randomly 392 // Fix charges randomly
>> 393
370 G4double electronTotEnergy; 394 G4double electronTotEnergy;
371 G4double positronTotEnergy; 395 G4double positronTotEnergy;
372 396
>> 397
>> 398 // if (G4int(2*G4UniformRand()))
373 if (G4UniformRand() > 0.5) 399 if (G4UniformRand() > 0.5)
374 { 400 {
375 electronTotEnergy = (1. - epsilon) * pho 401 electronTotEnergy = (1. - epsilon) * photonEnergy;
376 positronTotEnergy = epsilon * photonEner 402 positronTotEnergy = epsilon * photonEnergy;
377 } 403 }
378 else 404 else
379 { 405 {
380 positronTotEnergy = (1. - epsilon) * pho 406 positronTotEnergy = (1. - epsilon) * photonEnergy;
381 electronTotEnergy = epsilon * photonEner 407 electronTotEnergy = epsilon * photonEnergy;
382 } 408 }
383 409
384 // Scattered electron (positron) angles. ( Z 410 // Scattered electron (positron) angles. ( Z - axis along the parent photon)
385 // Universal distribution suggested by L. Ur 411 // Universal distribution suggested by L. Urban (Geant3 manual (1993) Phys211),
386 // derived from Tsai distribution (Rev. Mod. 412 // derived from Tsai distribution (Rev. Mod. Phys. 49, 421 (1977)
>> 413
>> 414 /*
>> 415 G4double u;
>> 416 const G4double a1 = 0.625;
>> 417 G4double a2 = 3. * a1;
>> 418
>> 419 if (0.25 > G4UniformRand())
>> 420 {
>> 421 u = - log(G4UniformRand() * G4UniformRand()) / a1 ;
>> 422 }
>> 423 else
>> 424 {
>> 425 u = - log(G4UniformRand() * G4UniformRand()) / a2 ;
>> 426 }
>> 427 */
>> 428
387 G4double Ene = electronTotEnergy/electron_ma 429 G4double Ene = electronTotEnergy/electron_mass_c2; // Normalized energy
388 430
389 G4double cosTheta = 0.; 431 G4double cosTheta = 0.;
390 G4double sinTheta = 0.; 432 G4double sinTheta = 0.;
391 433
392 SetTheta(&cosTheta,&sinTheta,Ene); 434 SetTheta(&cosTheta,&sinTheta,Ene);
>> 435
>> 436 // G4double theta = u * electron_mass_c2 / photonEnergy ;
>> 437 // G4double phi = twopi * G4UniformRand() ;
>> 438
393 G4double phi,psi=0.; 439 G4double phi,psi=0.;
394 440
395 //corrected e+ e- angular angular distributi 441 //corrected e+ e- angular angular distribution //preliminary!
>> 442
>> 443 // if(photonEnergy>50*MeV)
>> 444 // {
396 phi = SetPhi(photonEnergy); 445 phi = SetPhi(photonEnergy);
397 psi = SetPsi(photonEnergy,phi); 446 psi = SetPsi(photonEnergy,phi);
>> 447 // }
>> 448 //else
>> 449 // {
>> 450 //psi = G4UniformRand()*2.*pi;
>> 451 //phi = pi; // coplanar
>> 452 // }
>> 453
398 Psi = psi; 454 Psi = psi;
399 Phi = phi; 455 Phi = phi;
>> 456 //G4cout << "PHI " << phi << G4endl;
>> 457 //G4cout << "PSI " << psi << G4endl;
400 458
401 G4double phie, phip; 459 G4double phie, phip;
402 G4double choice, choice2; 460 G4double choice, choice2;
403 choice = G4UniformRand(); 461 choice = G4UniformRand();
404 choice2 = G4UniformRand(); 462 choice2 = G4UniformRand();
405 463
406 if (choice2 <= 0.5) 464 if (choice2 <= 0.5)
407 { 465 {
408 // do nothing 466 // do nothing
409 // phi = phi; 467 // phi = phi;
410 } 468 }
411 else 469 else
412 { 470 {
413 phi = -phi; 471 phi = -phi;
414 } 472 }
415 473
416 if (choice <= 0.5) 474 if (choice <= 0.5)
417 { 475 {
418 phie = psi; //azimuthal angle for the el 476 phie = psi; //azimuthal angle for the electron
419 phip = phie+phi; //azimuthal angle for t 477 phip = phie+phi; //azimuthal angle for the positron
420 } 478 }
421 else 479 else
422 { 480 {
423 // opzione 1 phie / phip equivalenti 481 // opzione 1 phie / phip equivalenti
>> 482
424 phip = psi; //azimuthal angle for the po 483 phip = psi; //azimuthal angle for the positron
425 phie = phip + phi; //azimuthal angle for 484 phie = phip + phi; //azimuthal angle for the electron
426 } 485 }
427 486
428 487
429 // Electron Kinematics 488 // Electron Kinematics
>> 489
430 G4double dirX = sinTheta*cos(phie); 490 G4double dirX = sinTheta*cos(phie);
431 G4double dirY = sinTheta*sin(phie); 491 G4double dirY = sinTheta*sin(phie);
432 G4double dirZ = cosTheta; 492 G4double dirZ = cosTheta;
433 G4ThreeVector electronDirection(dirX,dirY,di 493 G4ThreeVector electronDirection(dirX,dirY,dirZ);
434 494
435 // Kinematics of the created pair: 495 // Kinematics of the created pair:
436 // the electron and positron are assumed to 496 // the electron and positron are assumed to have a symetric angular
437 // distribution with respect to the Z axis a 497 // distribution with respect to the Z axis along the parent photon
438 498
>> 499 //G4double localEnergyDeposit = 0. ;
>> 500
439 G4double electronKineEnergy = std::max(0.,el 501 G4double electronKineEnergy = std::max(0.,electronTotEnergy - electron_mass_c2) ;
440 502
441 SystemOfRefChange(gammaDirection0,electronDi 503 SystemOfRefChange(gammaDirection0,electronDirection,
442 gammaPolarization0); 504 gammaPolarization0);
443 505
444 G4DynamicParticle* particle1 = new G4Dynamic 506 G4DynamicParticle* particle1 = new G4DynamicParticle (G4Electron::Electron(),
445 electronDirection, 507 electronDirection,
446 electronKineEnergy); 508 electronKineEnergy);
447 509
448 // The e+ is always created (even with kinet 510 // The e+ is always created (even with kinetic energy = 0) for further annihilation
>> 511
449 Ene = positronTotEnergy/electron_mass_c2; // 512 Ene = positronTotEnergy/electron_mass_c2; // Normalized energy
450 513
451 cosTheta = 0.; 514 cosTheta = 0.;
452 sinTheta = 0.; 515 sinTheta = 0.;
453 516
454 SetTheta(&cosTheta,&sinTheta,Ene); 517 SetTheta(&cosTheta,&sinTheta,Ene);
455 518
456 // Positron Kinematics 519 // Positron Kinematics
>> 520
457 dirX = sinTheta*cos(phip); 521 dirX = sinTheta*cos(phip);
458 dirY = sinTheta*sin(phip); 522 dirY = sinTheta*sin(phip);
459 dirZ = cosTheta; 523 dirZ = cosTheta;
460 G4ThreeVector positronDirection(dirX,dirY,di 524 G4ThreeVector positronDirection(dirX,dirY,dirZ);
461 525
462 G4double positronKineEnergy = std::max(0.,po 526 G4double positronKineEnergy = std::max(0.,positronTotEnergy - electron_mass_c2) ;
463 SystemOfRefChange(gammaDirection0,positronDi 527 SystemOfRefChange(gammaDirection0,positronDirection,
464 gammaPolarization0); 528 gammaPolarization0);
465 529
466 // Create G4DynamicParticle object for the p 530 // Create G4DynamicParticle object for the particle2
467 G4DynamicParticle* particle2 = new G4Dynamic 531 G4DynamicParticle* particle2 = new G4DynamicParticle(G4Positron::Positron(),
468 532 positronDirection, positronKineEnergy);
>> 533
>> 534
469 fvect->push_back(particle1); 535 fvect->push_back(particle1);
470 fvect->push_back(particle2); 536 fvect->push_back(particle2);
471 537
472 // Kill the incident photon 538 // Kill the incident photon
473 fParticleChange->SetProposedKineticEnergy(0. 539 fParticleChange->SetProposedKineticEnergy(0.);
474 fParticleChange->ProposeTrackStatus(fStopAnd 540 fParticleChange->ProposeTrackStatus(fStopAndKill);
>> 541
475 } 542 }
476 543
477 //....oooOO0OOooo........oooOO0OOooo........oo 544 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
478 545
479 G4double G4LivermorePolarizedGammaConversionMo 546 G4double G4LivermorePolarizedGammaConversionModel::ScreenFunction1(G4double screenVariable)
480 { 547 {
481 // Compute the value of the screening functi 548 // Compute the value of the screening function 3*phi1 - phi2
>> 549
482 G4double value; 550 G4double value;
>> 551
483 if (screenVariable > 1.) 552 if (screenVariable > 1.)
484 value = 42.24 - 8.368 * log(screenVariable 553 value = 42.24 - 8.368 * log(screenVariable + 0.952);
485 else 554 else
486 value = 42.392 - screenVariable * (7.796 - 555 value = 42.392 - screenVariable * (7.796 - 1.961 * screenVariable);
487 556
488 return value; 557 return value;
489 } 558 }
490 559
491 560
492 561
493 G4double G4LivermorePolarizedGammaConversionMo 562 G4double G4LivermorePolarizedGammaConversionModel::ScreenFunction2(G4double screenVariable)
494 { 563 {
495 // Compute the value of the screening functi 564 // Compute the value of the screening function 1.5*phi1 - 0.5*phi2
>> 565
496 G4double value; 566 G4double value;
497 567
498 if (screenVariable > 1.) 568 if (screenVariable > 1.)
499 value = 42.24 - 8.368 * log(screenVariable 569 value = 42.24 - 8.368 * log(screenVariable + 0.952);
500 else 570 else
501 value = 41.405 - screenVariable * (5.828 - 571 value = 41.405 - screenVariable * (5.828 - 0.8945 * screenVariable);
502 572
503 return value; 573 return value;
504 } 574 }
505 575
506 576
507 void G4LivermorePolarizedGammaConversionModel: 577 void G4LivermorePolarizedGammaConversionModel::SetTheta(G4double* p_cosTheta, G4double* p_sinTheta, G4double Energy)
508 { 578 {
>> 579
509 // to avoid computational errors since Theta 580 // to avoid computational errors since Theta could be very small
510 // Energy in Normalized Units (!) 581 // Energy in Normalized Units (!)
511 582
512 G4double Momentum = sqrt(Energy*Energy -1); 583 G4double Momentum = sqrt(Energy*Energy -1);
513 G4double Rand = G4UniformRand(); 584 G4double Rand = G4UniformRand();
514 585
515 *p_cosTheta = (Energy*((2*Rand)- 1) + Moment 586 *p_cosTheta = (Energy*((2*Rand)- 1) + Momentum)/((Momentum*(2*Rand-1))+Energy);
516 *p_sinTheta = (2*sqrt(Rand*(1-Rand)))/(Momen 587 *p_sinTheta = (2*sqrt(Rand*(1-Rand)))/(Momentum*(2*Rand-1)+Energy);
517 } 588 }
518 589
519 590
520 591
521 G4double G4LivermorePolarizedGammaConversionMo 592 G4double G4LivermorePolarizedGammaConversionModel::SetPhi(G4double Energy)
522 { 593 {
>> 594
>> 595
523 G4double value = 0.; 596 G4double value = 0.;
524 G4double Ene = Energy/MeV; 597 G4double Ene = Energy/MeV;
525 598
526 G4double pl[4]; 599 G4double pl[4];
>> 600
>> 601
527 G4double pt[2]; 602 G4double pt[2];
528 G4double xi = 0; 603 G4double xi = 0;
529 G4double xe = 0.; 604 G4double xe = 0.;
530 G4double n1=0.; 605 G4double n1=0.;
531 G4double n2=0.; 606 G4double n2=0.;
532 607
>> 608
533 if (Ene>=50.) 609 if (Ene>=50.)
534 { 610 {
535 const G4double ay0=5.6, by0=18.6, aa0=2. 611 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 612 const G4double aw = 0.0151, bw = 10.7, cw = -410.;
537 613
538 const G4double axc = 3.1455, bxc = -1.11 614 const G4double axc = 3.1455, bxc = -1.11, cxc = 310.;
539 615
540 pl[0] = Fln(ay0,by0,Ene); 616 pl[0] = Fln(ay0,by0,Ene);
541 pl[1] = aa0 + ba0*(Ene); 617 pl[1] = aa0 + ba0*(Ene);
542 pl[2] = Poli(aw,bw,cw,Ene); 618 pl[2] = Poli(aw,bw,cw,Ene);
543 pl[3] = Poli(axc,bxc,cxc,Ene); 619 pl[3] = Poli(axc,bxc,cxc,Ene);
544 620
545 const G4double abf = 3.1216, bbf = 2.68; 621 const G4double abf = 3.1216, bbf = 2.68;
546 pt[0] = -1.4; 622 pt[0] = -1.4;
547 pt[1] = abf + bbf/Ene; 623 pt[1] = abf + bbf/Ene;
548 624
>> 625
>> 626
>> 627 //G4cout << "PL > 50. "<< pl[0] << " " << pl[1] << " " << pl[2] << " " <<pl[3] << " " << G4endl;
>> 628
549 xi = 3.0; 629 xi = 3.0;
550 xe = Encu(pl,pt,xi); 630 xe = Encu(pl,pt,xi);
>> 631 //G4cout << "ENCU "<< xe << G4endl;
551 n1 = Fintlor(pl,pi) - Fintlor(pl,xe); 632 n1 = Fintlor(pl,pi) - Fintlor(pl,xe);
552 n2 = Finttan(pt,xe) - Finttan(pt,0.); 633 n2 = Finttan(pt,xe) - Finttan(pt,0.);
553 } 634 }
554 else 635 else
555 { 636 {
556 const G4double ay0=0.144, by0=0.11; 637 const G4double ay0=0.144, by0=0.11;
557 const G4double aa0=2.7, ba0 = 2.74; 638 const G4double aa0=2.7, ba0 = 2.74;
558 const G4double aw = 0.21, bw = 10.8, cw 639 const G4double aw = 0.21, bw = 10.8, cw = -58.;
559 const G4double axc = 3.17, bxc = -0.87, 640 const G4double axc = 3.17, bxc = -0.87, cxc = -6.;
560 641
561 pl[0] = Fln(ay0, by0, Ene); 642 pl[0] = Fln(ay0, by0, Ene);
562 pl[1] = Fln(aa0, ba0, Ene); 643 pl[1] = Fln(aa0, ba0, Ene);
563 pl[2] = Poli(aw,bw,cw,Ene); 644 pl[2] = Poli(aw,bw,cw,Ene);
564 pl[3] = Poli(axc,bxc,cxc,Ene); 645 pl[3] = Poli(axc,bxc,cxc,Ene);
565 646
>> 647 //G4cout << "PL < 50."<< pl[0] << " " << pl[1] << " " << pl[2] << " " <<pl[3] << " " << G4endl;
>> 648 //G4cout << "ENCU "<< xe << G4endl;
566 n1 = Fintlor(pl,pi) - Fintlor(pl,xe); 649 n1 = Fintlor(pl,pi) - Fintlor(pl,xe);
>> 650
567 } 651 }
568 652
569 653
570 G4double n=0.; 654 G4double n=0.;
571 n = n1+n2; 655 n = n1+n2;
572 656
573 G4double c1 = 0.; 657 G4double c1 = 0.;
574 c1 = Glor(pl, xe); 658 c1 = Glor(pl, xe);
575 659
>> 660 /*
>> 661 G4double xm = 0.;
>> 662 xm = Flor(pl,pl[3])*Glor(pl,pl[3]);
>> 663 */
>> 664
576 G4double r1,r2,r3; 665 G4double r1,r2,r3;
577 G4double xco=0.; 666 G4double xco=0.;
578 667
579 if (Ene>=50.) 668 if (Ene>=50.)
580 { 669 {
581 r1= G4UniformRand(); 670 r1= G4UniformRand();
582 if( r1>=n2/n) 671 if( r1>=n2/n)
583 { 672 {
584 do 673 do
585 { 674 {
586 r2 = G4UniformRand(); 675 r2 = G4UniformRand();
587 value = Finvlor(pl,xe,r2); 676 value = Finvlor(pl,xe,r2);
588 xco = Glor(pl,value)/c1; 677 xco = Glor(pl,value)/c1;
589 r3 = G4UniformRand(); 678 r3 = G4UniformRand();
590 } while(r3>=xco); 679 } while(r3>=xco);
591 } 680 }
592 else 681 else
593 { 682 {
594 value = Finvtan(pt,n,r1); 683 value = Finvtan(pt,n,r1);
595 } 684 }
596 } 685 }
597 else 686 else
598 { 687 {
599 do 688 do
600 { 689 {
601 r2 = G4UniformRand(); 690 r2 = G4UniformRand();
602 value = Finvlor(pl,xe,r2); 691 value = Finvlor(pl,xe,r2);
603 xco = Glor(pl,value)/c1; 692 xco = Glor(pl,value)/c1;
604 r3 = G4UniformRand(); 693 r3 = G4UniformRand();
605 } while(r3>=xco); 694 } while(r3>=xco);
606 } 695 }
>> 696
>> 697 // G4cout << "PHI = " <<value << G4endl;
607 return value; 698 return value;
608 } 699 }
609 <<
610 //....oooOO0OOooo........oooOO0OOooo........oo <<
611 <<
612 G4double G4LivermorePolarizedGammaConversionMo 700 G4double G4LivermorePolarizedGammaConversionModel::SetPsi(G4double Energy, G4double PhiLocal)
613 { 701 {
>> 702
614 G4double value = 0.; 703 G4double value = 0.;
615 G4double Ene = Energy/MeV; 704 G4double Ene = Energy/MeV;
616 705
617 G4double p0l[4]; 706 G4double p0l[4];
618 G4double ppml[4]; 707 G4double ppml[4];
619 G4double p0t[2]; 708 G4double p0t[2];
620 G4double ppmt[2]; 709 G4double ppmt[2];
621 710
622 G4double xi = 0.; 711 G4double xi = 0.;
623 G4double xe0 = 0.; 712 G4double xe0 = 0.;
624 G4double xepm = 0.; 713 G4double xepm = 0.;
625 714
626 if (Ene>=50.) 715 if (Ene>=50.)
627 { 716 {
628 const G4double ay00 = 3.4, by00 = 9.8, a 717 const G4double ay00 = 3.4, by00 = 9.8, aa00 = 1.34, ba00 = 5.3;
629 const G4double aw0 = 0.014, bw0 = 9.7, c 718 const G4double aw0 = 0.014, bw0 = 9.7, cw0 = -2.E4;
630 const G4double axc0 = 3.1423, bxc0 = -2. 719 const G4double axc0 = 3.1423, bxc0 = -2.35, cxc0 = 0.;
631 const G4double ay0p = 1.53, by0p = 3.2, 720 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, 721 const G4double awp = 6.9E-3, bwp = 12.6, cwp = -3.8E4;
633 const G4double axcp = 2.8E-3,bxcp = -3.1 722 const G4double axcp = 2.8E-3,bxcp = -3.133;
634 const G4double abf0 = 3.1213, bbf0 = 2.6 723 const G4double abf0 = 3.1213, bbf0 = 2.61;
635 const G4double abfpm = 3.1231, bbfpm = 2 724 const G4double abfpm = 3.1231, bbfpm = 2.84;
636 725
637 p0l[0] = Fln(ay00, by00, Ene); 726 p0l[0] = Fln(ay00, by00, Ene);
638 p0l[1] = Fln(aa00, ba00, Ene); 727 p0l[1] = Fln(aa00, ba00, Ene);
639 p0l[2] = Poli(aw0, bw0, cw0, Ene); 728 p0l[2] = Poli(aw0, bw0, cw0, Ene);
640 p0l[3] = Poli(axc0, bxc0, cxc0, Ene); 729 p0l[3] = Poli(axc0, bxc0, cxc0, Ene);
641 730
642 ppml[0] = Fln(ay0p, by0p, Ene); 731 ppml[0] = Fln(ay0p, by0p, Ene);
643 ppml[1] = aap + bap*(Ene); 732 ppml[1] = aap + bap*(Ene);
644 ppml[2] = Poli(awp, bwp, cwp, Ene); 733 ppml[2] = Poli(awp, bwp, cwp, Ene);
645 ppml[3] = Fln(axcp,bxcp,Ene); 734 ppml[3] = Fln(axcp,bxcp,Ene);
646 735
647 p0t[0] = -0.81; 736 p0t[0] = -0.81;
648 p0t[1] = abf0 + bbf0/Ene; 737 p0t[1] = abf0 + bbf0/Ene;
649 ppmt[0] = -0.6; 738 ppmt[0] = -0.6;
650 ppmt[1] = abfpm + bbfpm/Ene; 739 ppmt[1] = abfpm + bbfpm/Ene;
651 740
>> 741 //G4cout << "P0L > 50"<< p0l[0] << " " << p0l[1] << " " << p0l[2] << " " <<p0l[3] << " " << G4endl;
>> 742 //G4cout << "PPML > 50"<< ppml[0] << " " << ppml[1] << " " << ppml[2] << " " <<ppml[3] << " " << G4endl;
>> 743
652 xi = 3.0; 744 xi = 3.0;
653 xe0 = Encu(p0l, p0t, xi); 745 xe0 = Encu(p0l, p0t, xi);
>> 746 //G4cout << "ENCU1 "<< xe0 << G4endl;
654 xepm = Encu(ppml, ppmt, xi); 747 xepm = Encu(ppml, ppmt, xi);
>> 748 //G4cout << "ENCU2 "<< xepm << G4endl;
655 } 749 }
656 else 750 else
657 { 751 {
658 const G4double ay00 = 2.82, by00 = 6.35; 752 const G4double ay00 = 2.82, by00 = 6.35;
659 const G4double aa00 = -1.75, ba00 = 0.25 753 const G4double aa00 = -1.75, ba00 = 0.25;
660 754
661 const G4double aw0 = 0.028, bw0 = 5., cw 755 const G4double aw0 = 0.028, bw0 = 5., cw0 = -50.;
662 const G4double axc0 = 3.14213, bxc0 = -2 756 const G4double axc0 = 3.14213, bxc0 = -2.3, cxc0 = 5.7;
663 const G4double ay0p = 1.56, by0p = 3.6; 757 const G4double ay0p = 1.56, by0p = 3.6;
664 const G4double aap = 0.86, bap = 8.3E-3; 758 const G4double aap = 0.86, bap = 8.3E-3;
665 const G4double awp = 0.022, bwp = 7.4, c 759 const G4double awp = 0.022, bwp = 7.4, cwp = -51.;
666 const G4double xcp = 3.1486; 760 const G4double xcp = 3.1486;
667 761
668 p0l[0] = Fln(ay00, by00, Ene); 762 p0l[0] = Fln(ay00, by00, Ene);
669 p0l[1] = aa00+pow(Ene, ba00); 763 p0l[1] = aa00+pow(Ene, ba00);
670 p0l[2] = Poli(aw0, bw0, cw0, Ene); 764 p0l[2] = Poli(aw0, bw0, cw0, Ene);
671 p0l[3] = Poli(axc0, bxc0, cxc0, Ene); 765 p0l[3] = Poli(axc0, bxc0, cxc0, Ene);
672 ppml[0] = Fln(ay0p, by0p, Ene); 766 ppml[0] = Fln(ay0p, by0p, Ene);
673 ppml[1] = aap + bap*(Ene); 767 ppml[1] = aap + bap*(Ene);
674 ppml[2] = Poli(awp, bwp, cwp, Ene); 768 ppml[2] = Poli(awp, bwp, cwp, Ene);
675 ppml[3] = xcp; 769 ppml[3] = xcp;
>> 770
676 } 771 }
677 772
678 G4double a,b=0.; 773 G4double a,b=0.;
679 774
680 if (Ene>=50.) 775 if (Ene>=50.)
681 { 776 {
682 if (PhiLocal>xepm) 777 if (PhiLocal>xepm)
683 { 778 {
684 b = (ppml[0]+2*ppml[1]*ppml[2]*Flor( 779 b = (ppml[0]+2*ppml[1]*ppml[2]*Flor(ppml,PhiLocal));
685 } 780 }
686 else 781 else
687 { 782 {
688 b = Ftan(ppmt,PhiLocal); 783 b = Ftan(ppmt,PhiLocal);
689 } 784 }
690 if (PhiLocal>xe0) 785 if (PhiLocal>xe0)
691 { 786 {
692 a = (p0l[0]+2*p0l[1]*p0l[2]*Flor(p0l 787 a = (p0l[0]+2*p0l[1]*p0l[2]*Flor(p0l,PhiLocal));
693 } 788 }
694 else 789 else
695 { 790 {
696 a = Ftan(p0t,PhiLocal); 791 a = Ftan(p0t,PhiLocal);
697 } 792 }
698 } 793 }
699 else 794 else
700 { 795 {
701 b = (ppml[0]+2*ppml[1]*ppml[2]*Flor(ppml 796 b = (ppml[0]+2*ppml[1]*ppml[2]*Flor(ppml,PhiLocal));
702 a = (p0l[0]+2*p0l[1]*p0l[2]*Flor(p0l,Phi 797 a = (p0l[0]+2*p0l[1]*p0l[2]*Flor(p0l,PhiLocal));
703 } 798 }
704 G4double nr =0.; 799 G4double nr =0.;
705 800
706 if (b>a) 801 if (b>a)
707 { 802 {
708 nr = 1./b; 803 nr = 1./b;
709 } 804 }
710 else 805 else
711 { 806 {
712 nr = 1./a; 807 nr = 1./a;
713 } 808 }
714 809
715 G4double r1,r2=0.; 810 G4double r1,r2=0.;
716 G4double r3 =-1.; 811 G4double r3 =-1.;
717 do 812 do
718 { 813 {
719 r1 = G4UniformRand(); 814 r1 = G4UniformRand();
720 r2 = G4UniformRand(); 815 r2 = G4UniformRand();
721 //value = r2*pi; 816 //value = r2*pi;
722 value = 2.*r2*pi; 817 value = 2.*r2*pi;
723 r3 = nr*(a*cos(value)*cos(value) + b*sin 818 r3 = nr*(a*cos(value)*cos(value) + b*sin(value)*sin(value));
724 }while(r1>r3); 819 }while(r1>r3);
725 820
726 return value; 821 return value;
727 } 822 }
728 823
729 //....oooOO0OOooo........oooOO0OOooo........oo <<
730 824
731 G4double G4LivermorePolarizedGammaConversionMo 825 G4double G4LivermorePolarizedGammaConversionModel::Poli
732 (G4double a, G4double b, G4double c, G4double 826 (G4double a, G4double b, G4double c, G4double x)
733 { 827 {
734 G4double value=0.; 828 G4double value=0.;
735 if(x>0.) 829 if(x>0.)
736 { 830 {
737 value =(a + b/x + c/(x*x*x)); 831 value =(a + b/x + c/(x*x*x));
738 } 832 }
739 else 833 else
740 { 834 {
741 //G4cout << "ERROR in Poli! " << G4endl; 835 //G4cout << "ERROR in Poli! " << G4endl;
742 } 836 }
743 return value; 837 return value;
744 } 838 }
745 <<
746 //....oooOO0OOooo........oooOO0OOooo........oo <<
747 <<
748 G4double G4LivermorePolarizedGammaConversionMo 839 G4double G4LivermorePolarizedGammaConversionModel::Fln
749 (G4double a, G4double b, G4double x) 840 (G4double a, G4double b, G4double x)
750 { 841 {
751 G4double value=0.; 842 G4double value=0.;
752 if(x>0.) 843 if(x>0.)
753 { 844 {
754 value =(a*log(x)-b); 845 value =(a*log(x)-b);
755 } 846 }
756 else 847 else
757 { 848 {
758 //G4cout << "ERROR in Fln! " << G4endl; 849 //G4cout << "ERROR in Fln! " << G4endl;
759 } 850 }
760 return value; 851 return value;
761 } 852 }
762 853
763 //....oooOO0OOooo........oooOO0OOooo........oo <<
764 854
765 G4double G4LivermorePolarizedGammaConversionMo 855 G4double G4LivermorePolarizedGammaConversionModel::Encu
766 (G4double* p_p1, G4double* p_p2, G4double x0) 856 (G4double* p_p1, G4double* p_p2, G4double x0)
767 { 857 {
768 G4int i=0; 858 G4int i=0;
769 G4double fx = 1.; 859 G4double fx = 1.;
770 G4double x = x0; 860 G4double x = x0;
771 const G4double xmax = 3.0; 861 const G4double xmax = 3.0;
772 862
773 for(i=0; i<100; ++i) 863 for(i=0; i<100; ++i)
774 { 864 {
775 fx = (Flor(p_p1,x)*Glor(p_p1,x) - Ftan(p 865 fx = (Flor(p_p1,x)*Glor(p_p1,x) - Ftan(p_p2, x))/
776 (Fdlor(p_p1,x) - Fdtan(p_p2,x)); 866 (Fdlor(p_p1,x) - Fdtan(p_p2,x));
777 x -= fx; 867 x -= fx;
778 if(x > xmax) { return xmax; } 868 if(x > xmax) { return xmax; }
>> 869 // x -= (Flor(p_p1, x)*Glor(p_p1,x) - Ftan(p_p2, x))/
>> 870 // (Fdlor(p_p1,x) - Fdtan(p_p2,x));
>> 871 // fx = Flor(p_p1,x)*Glor(p_p1,x) - Ftan(p_p2, x);
>> 872 // G4cout << std::fabs(fx) << " " << i << " " << x << "dentro ENCU " << G4endl;
779 if(std::fabs(fx) <= x*1.0e-6) { break; } 873 if(std::fabs(fx) <= x*1.0e-6) { break; }
780 } 874 }
781 875
782 if(x < 0.0) { x = 0.0; } 876 if(x < 0.0) { x = 0.0; }
783 return x; 877 return x;
784 } 878 }
785 879
786 //....oooOO0OOooo........oooOO0OOooo........oo <<
787 880
788 G4double G4LivermorePolarizedGammaConversionMo 881 G4double G4LivermorePolarizedGammaConversionModel::Flor(G4double* p_p1, G4double x)
789 { 882 {
790 G4double value =0.; 883 G4double value =0.;
>> 884 // G4double y0 = p_p1[0];
>> 885 // G4double A = p_p1[1];
791 G4double w = p_p1[2]; 886 G4double w = p_p1[2];
792 G4double xc = p_p1[3]; 887 G4double xc = p_p1[3];
793 888
794 value = 1./(pi*(w*w + 4.*(x-xc)*(x-xc))); 889 value = 1./(pi*(w*w + 4.*(x-xc)*(x-xc)));
795 return value; 890 return value;
796 } 891 }
797 892
798 //....oooOO0OOooo........oooOO0OOooo........oo <<
799 893
800 G4double G4LivermorePolarizedGammaConversionMo 894 G4double G4LivermorePolarizedGammaConversionModel::Glor(G4double* p_p1, G4double x)
801 { 895 {
802 G4double value =0.; 896 G4double value =0.;
803 G4double y0 = p_p1[0]; 897 G4double y0 = p_p1[0];
804 G4double A = p_p1[1]; 898 G4double A = p_p1[1];
805 G4double w = p_p1[2]; 899 G4double w = p_p1[2];
806 G4double xc = p_p1[3]; 900 G4double xc = p_p1[3];
807 901
808 value = (y0 *pi*(w*w + 4.*(x-xc)*(x-xc)) + 902 value = (y0 *pi*(w*w + 4.*(x-xc)*(x-xc)) + 2.*A*w);
809 return value; 903 return value;
810 } 904 }
811 905
812 //....oooOO0OOooo........oooOO0OOooo........oo <<
813 906
814 G4double G4LivermorePolarizedGammaConversionMo 907 G4double G4LivermorePolarizedGammaConversionModel::Fdlor(G4double* p_p1, G4double x)
815 { 908 {
816 G4double value =0.; 909 G4double value =0.;
>> 910 //G4double y0 = p_p1[0];
817 G4double A = p_p1[1]; 911 G4double A = p_p1[1];
818 G4double w = p_p1[2]; 912 G4double w = p_p1[2];
819 G4double xc = p_p1[3]; 913 G4double xc = p_p1[3];
820 914
821 value = (-16.*A*w*(x-xc))/ 915 value = (-16.*A*w*(x-xc))/
822 (pi*(w*w+4.*(x-xc)*(x-xc))*(w*w+4.*(x-xc)* 916 (pi*(w*w+4.*(x-xc)*(x-xc))*(w*w+4.*(x-xc)*(x-xc)));
823 return value; 917 return value;
824 } 918 }
825 919
826 //....oooOO0OOooo........oooOO0OOooo........oo <<
827 920
828 G4double G4LivermorePolarizedGammaConversionMo 921 G4double G4LivermorePolarizedGammaConversionModel::Fintlor(G4double* p_p1, G4double x)
829 { 922 {
830 G4double value =0.; 923 G4double value =0.;
831 G4double y0 = p_p1[0]; 924 G4double y0 = p_p1[0];
832 G4double A = p_p1[1]; 925 G4double A = p_p1[1];
833 G4double w = p_p1[2]; 926 G4double w = p_p1[2];
834 G4double xc = p_p1[3]; 927 G4double xc = p_p1[3];
835 928
836 value = y0*x + A*atan( 2*(x-xc)/w) / pi; 929 value = y0*x + A*atan( 2*(x-xc)/w) / pi;
837 return value; 930 return value;
838 } 931 }
839 932
840 933
841 G4double G4LivermorePolarizedGammaConversionMo 934 G4double G4LivermorePolarizedGammaConversionModel::Finvlor(G4double* p_p1, G4double x, G4double r)
842 { 935 {
843 G4double value = 0.; 936 G4double value = 0.;
844 G4double nor = 0.; 937 G4double nor = 0.;
>> 938 //G4double y0 = p_p1[0];
>> 939 // G4double A = p_p1[1];
845 G4double w = p_p1[2]; 940 G4double w = p_p1[2];
846 G4double xc = p_p1[3]; 941 G4double xc = p_p1[3];
847 942
848 nor = atan(2.*(pi-xc)/w)/(2.*pi*w) - atan(2. 943 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( 944 value = xc - (w/2.)*tan(-2.*r*nor*pi*w+atan(2*(xc-x)/w));
850 945
851 return value; 946 return value;
852 } 947 }
853 948
854 //....oooOO0OOooo........oooOO0OOooo........oo <<
855 949
856 G4double G4LivermorePolarizedGammaConversionMo 950 G4double G4LivermorePolarizedGammaConversionModel::Ftan(G4double* p_p1, G4double x)
857 { 951 {
858 G4double value =0.; 952 G4double value =0.;
859 G4double a = p_p1[0]; 953 G4double a = p_p1[0];
860 G4double b = p_p1[1]; 954 G4double b = p_p1[1];
861 955
862 value = a /(x-b); 956 value = a /(x-b);
863 return value; 957 return value;
864 } 958 }
865 959
866 //....oooOO0OOooo........oooOO0OOooo........oo <<
867 960
868 G4double G4LivermorePolarizedGammaConversionMo 961 G4double G4LivermorePolarizedGammaConversionModel::Fdtan(G4double* p_p1, G4double x)
869 { 962 {
870 G4double value =0.; 963 G4double value =0.;
871 G4double a = p_p1[0]; 964 G4double a = p_p1[0];
872 G4double b = p_p1[1]; 965 G4double b = p_p1[1];
873 966
874 value = -1.*a / ((x-b)*(x-b)); 967 value = -1.*a / ((x-b)*(x-b));
875 return value; 968 return value;
876 } 969 }
877 970
878 //....oooOO0OOooo........oooOO0OOooo........oo <<
879 971
880 G4double G4LivermorePolarizedGammaConversionMo 972 G4double G4LivermorePolarizedGammaConversionModel::Finttan(G4double* p_p1, G4double x)
881 { 973 {
882 G4double value =0.; 974 G4double value =0.;
883 G4double a = p_p1[0]; 975 G4double a = p_p1[0];
884 G4double b = p_p1[1]; 976 G4double b = p_p1[1];
885 977
>> 978
886 value = a*log(b-x); 979 value = a*log(b-x);
887 return value; 980 return value;
888 } 981 }
889 982
890 //....oooOO0OOooo........oooOO0OOooo........oo <<
891 983
892 G4double G4LivermorePolarizedGammaConversionMo 984 G4double G4LivermorePolarizedGammaConversionModel::Finvtan(G4double* p_p1, G4double cnor, G4double r)
893 { 985 {
894 G4double value =0.; 986 G4double value =0.;
895 G4double a = p_p1[0]; 987 G4double a = p_p1[0];
896 G4double b = p_p1[1]; 988 G4double b = p_p1[1];
897 989
898 value = b*(1-G4Exp(r*cnor/a)); 990 value = b*(1-G4Exp(r*cnor/a));
899 991
900 return value; 992 return value;
901 } 993 }
902 994
>> 995
>> 996
>> 997
903 //....oooOO0OOooo........oooOO0OOooo........oo 998 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
904 999
905 G4ThreeVector G4LivermorePolarizedGammaConvers 1000 G4ThreeVector G4LivermorePolarizedGammaConversionModel::SetPerpendicularVector(G4ThreeVector& a)
906 { 1001 {
907 G4double dx = a.x(); 1002 G4double dx = a.x();
908 G4double dy = a.y(); 1003 G4double dy = a.y();
909 G4double dz = a.z(); 1004 G4double dz = a.z();
910 G4double x = dx < 0.0 ? -dx : dx; 1005 G4double x = dx < 0.0 ? -dx : dx;
911 G4double y = dy < 0.0 ? -dy : dy; 1006 G4double y = dy < 0.0 ? -dy : dy;
912 G4double z = dz < 0.0 ? -dz : dz; 1007 G4double z = dz < 0.0 ? -dz : dz;
913 if (x < y) { 1008 if (x < y) {
914 return x < z ? G4ThreeVector(-dy,dx,0) : G 1009 return x < z ? G4ThreeVector(-dy,dx,0) : G4ThreeVector(0,-dz,dy);
915 }else{ 1010 }else{
916 return y < z ? G4ThreeVector(dz,0,-dx) : G 1011 return y < z ? G4ThreeVector(dz,0,-dx) : G4ThreeVector(-dy,dx,0);
917 } 1012 }
918 } 1013 }
919 1014
920 //....oooOO0OOooo........oooOO0OOooo........oo 1015 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
921 1016
922 G4ThreeVector G4LivermorePolarizedGammaConvers 1017 G4ThreeVector G4LivermorePolarizedGammaConversionModel::GetRandomPolarization(G4ThreeVector& direction0)
923 { 1018 {
924 G4ThreeVector d0 = direction0.unit(); 1019 G4ThreeVector d0 = direction0.unit();
925 G4ThreeVector a1 = SetPerpendicularVector(d0 1020 G4ThreeVector a1 = SetPerpendicularVector(d0); //different orthogonal
926 G4ThreeVector a0 = a1.unit(); // unit vector 1021 G4ThreeVector a0 = a1.unit(); // unit vector
927 1022
928 G4double rand1 = G4UniformRand(); 1023 G4double rand1 = G4UniformRand();
929 1024
930 G4double angle = twopi*rand1; // random pola 1025 G4double angle = twopi*rand1; // random polar angle
931 G4ThreeVector b0 = d0.cross(a0); // cross pr 1026 G4ThreeVector b0 = d0.cross(a0); // cross product
932 1027
933 G4ThreeVector c; 1028 G4ThreeVector c;
934 1029
935 c.setX(std::cos(angle)*(a0.x())+std::sin(ang 1030 c.setX(std::cos(angle)*(a0.x())+std::sin(angle)*b0.x());
936 c.setY(std::cos(angle)*(a0.y())+std::sin(ang 1031 c.setY(std::cos(angle)*(a0.y())+std::sin(angle)*b0.y());
937 c.setZ(std::cos(angle)*(a0.z())+std::sin(ang 1032 c.setZ(std::cos(angle)*(a0.z())+std::sin(angle)*b0.z());
938 1033
939 G4ThreeVector c0 = c.unit(); 1034 G4ThreeVector c0 = c.unit();
940 1035
941 return c0; << 1036 return c0;
>> 1037
942 } 1038 }
943 1039
944 //....oooOO0OOooo........oooOO0OOooo........oo 1040 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
945 1041
946 G4ThreeVector G4LivermorePolarizedGammaConvers 1042 G4ThreeVector G4LivermorePolarizedGammaConversionModel::GetPerpendicularPolarization
947 (const G4ThreeVector& gammaDirection, const G4 1043 (const G4ThreeVector& gammaDirection, const G4ThreeVector& gammaPolarization) const
948 { 1044 {
>> 1045
949 // 1046 //
950 // The polarization of a photon is always pe 1047 // The polarization of a photon is always perpendicular to its momentum direction.
951 // Therefore this function removes those vec 1048 // Therefore this function removes those vector component of gammaPolarization, which
952 // points in direction of gammaDirection 1049 // points in direction of gammaDirection
953 // 1050 //
954 // Mathematically we search the projection o 1051 // Mathematically we search the projection of the vector a on the plane E, where n is the
955 // plains normal vector. 1052 // plains normal vector.
956 // The basic equation can be found in each g 1053 // The basic equation can be found in each geometry book (e.g. Bronstein):
957 // p = a - (a o n)/(n o n)*n 1054 // p = a - (a o n)/(n o n)*n
958 1055
959 return gammaPolarization - gammaPolarization 1056 return gammaPolarization - gammaPolarization.dot(gammaDirection)/gammaDirection.dot(gammaDirection) * gammaDirection;
960 } 1057 }
961 1058
962 //....oooOO0OOooo........oooOO0OOooo........oo 1059 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
963 1060
>> 1061
964 void G4LivermorePolarizedGammaConversionModel: 1062 void G4LivermorePolarizedGammaConversionModel::SystemOfRefChange
965 (G4ThreeVector& direction0,G4ThreeVector& 1063 (G4ThreeVector& direction0,G4ThreeVector& direction1,
966 G4ThreeVector& polarization0) 1064 G4ThreeVector& polarization0)
967 { 1065 {
968 // direction0 is the original photon directi 1066 // direction0 is the original photon direction ---> z
969 // polarization0 is the original photon pola 1067 // polarization0 is the original photon polarization ---> x
970 // need to specify y axis in the real refere 1068 // need to specify y axis in the real reference frame ---> y
971 G4ThreeVector Axis_Z0 = direction0.unit(); 1069 G4ThreeVector Axis_Z0 = direction0.unit();
972 G4ThreeVector Axis_X0 = polarization0.unit() 1070 G4ThreeVector Axis_X0 = polarization0.unit();
973 G4ThreeVector Axis_Y0 = (Axis_Z0.cross(Axis_ 1071 G4ThreeVector Axis_Y0 = (Axis_Z0.cross(Axis_X0)).unit(); // to be confirmed;
974 1072
975 G4double direction_x = direction1.getX(); 1073 G4double direction_x = direction1.getX();
976 G4double direction_y = direction1.getY(); 1074 G4double direction_y = direction1.getY();
977 G4double direction_z = direction1.getZ(); 1075 G4double direction_z = direction1.getZ();
978 1076
979 direction1 = (direction_x*Axis_X0 + directio << 1077 direction1 = (direction_x*Axis_X0 + direction_y*Axis_Y0 + direction_z*Axis_Z0).unit();
>> 1078
980 } 1079 }
981 1080
>> 1081
982 //....oooOO0OOooo........oooOO0OOooo........oo 1082 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
983 1083
>> 1084 #include "G4AutoLock.hh"
>> 1085 namespace { G4Mutex LivermorePolarizedGammaConversionModelMutex = G4MUTEX_INITIALIZER; }
>> 1086
984 void G4LivermorePolarizedGammaConversionModel: 1087 void G4LivermorePolarizedGammaConversionModel::InitialiseForElement(
985 const G4ParticleDefiniti 1088 const G4ParticleDefinition*,
986 G4int Z) 1089 G4int Z)
987 { 1090 {
988 G4AutoLock l(&LivermorePolarizedGammaConvers 1091 G4AutoLock l(&LivermorePolarizedGammaConversionModelMutex);
>> 1092 // G4cout << "G4LivermorePolarizedGammaConversionModel::InitialiseForElement Z= "
>> 1093 // << Z << G4endl;
989 if(!data[Z]) { ReadData(Z); } 1094 if(!data[Z]) { ReadData(Z); }
990 l.unlock(); 1095 l.unlock();
991 } 1096 }
992 1097