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25 // 25 //
>> 26 //
>> 27 // $Id: G4PolarizedComptonModel.cc 82755 2014-07-08 14:07:29Z gcosmo $
>> 28 //
26 // ------------------------------------------- 29 // -------------------------------------------------------------------
27 // 30 //
28 // Geant4 Class file << 31 // GEANT4 Class file
>> 32 //
29 // 33 //
30 // File name: G4PolarizedComptonModel 34 // File name: G4PolarizedComptonModel
31 // 35 //
32 // Author: Andreas Schaelicke 36 // Author: Andreas Schaelicke
>> 37 //
>> 38 // Creation date: 01.05.2005
>> 39 //
>> 40 // Modifications:
>> 41 // 18-07-06 use newly calculated cross sections (P. Starovoitov)
>> 42 // 21-08-05 update interface (A. Schaelicke)
>> 43 //
>> 44 // Class Description:
>> 45 //
>> 46 // -------------------------------------------------------------------
>> 47 //
>> 48 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
>> 49 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
33 50
34 #include "G4PolarizedComptonModel.hh" 51 #include "G4PolarizedComptonModel.hh"
35 <<
36 #include "G4Exp.hh" <<
37 #include "G4Log.hh" <<
38 #include "G4ParticleChangeForGamma.hh" <<
39 #include "G4PhysicalConstants.hh" 52 #include "G4PhysicalConstants.hh"
>> 53 #include "G4Electron.hh"
>> 54 #include "G4Gamma.hh"
>> 55 #include "Randomize.hh"
>> 56 #include "G4DataVector.hh"
>> 57 #include "G4ParticleChangeForGamma.hh"
>> 58
>> 59
>> 60 #include "G4StokesVector.hh"
40 #include "G4PolarizationManager.hh" 61 #include "G4PolarizationManager.hh"
41 #include "G4PolarizationHelper.hh" 62 #include "G4PolarizationHelper.hh"
42 #include "G4PolarizedComptonXS.hh" << 63 #include "G4PolarizedComptonCrossSection.hh"
43 #include "G4StokesVector.hh" <<
44 #include "G4SystemOfUnits.hh" <<
45 64
46 //....oooOO0OOooo........oooOO0OOooo........oo 65 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
>> 66
47 G4PolarizedComptonModel::G4PolarizedComptonMod 67 G4PolarizedComptonModel::G4PolarizedComptonModel(const G4ParticleDefinition*,
48 << 68 const G4String& nam)
49 : G4KleinNishinaCompton(nullptr, nam) << 69 : G4KleinNishinaCompton(0,nam),
50 , fVerboseLevel(0) << 70 verboseLevel(0)
51 { 71 {
52 fCrossSectionCalculator = new G4PolarizedCom << 72 crossSectionCalculator = new G4PolarizedComptonCrossSection();
53 fBeamPolarization = G4StokesVector::ZE <<
54 fTargetPolarization = G4StokesVector::ZE <<
55 } 73 }
56 74
57 //....oooOO0OOooo........oooOO0OOooo........oo 75 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
>> 76
58 G4PolarizedComptonModel::~G4PolarizedComptonMo 77 G4PolarizedComptonModel::~G4PolarizedComptonModel()
59 { 78 {
60 delete fCrossSectionCalculator; << 79 delete crossSectionCalculator;
61 } 80 }
62 81
63 //....oooOO0OOooo........oooOO0OOooo........oo << 82 G4double G4PolarizedComptonModel::ComputeAsymmetryPerAtom
64 G4double G4PolarizedComptonModel::ComputeAsymm << 83 (G4double gammaEnergy, G4double /*Z*/)
65 << 84
66 { 85 {
67 G4double asymmetry = 0.0; << 86 G4double asymmetry = 0.0 ;
68 87
69 G4double k0 = gammaEnergy / electron_mass_c2 << 88 G4double k0 = gammaEnergy / electron_mass_c2 ;
70 G4double k1 = 1. + 2. * k0; << 89 G4double k1 = 1 + 2*k0 ;
71 90
72 asymmetry = -k0; 91 asymmetry = -k0;
73 asymmetry *= << 92 asymmetry *= (k0 + 1.)*sqr(k1)*std::log(k1) - 2.*k0*(5.*sqr(k0) + 4.*k0 + 1.);
74 (k0 + 1.) * sqr(k1) * G4Log(k1) - 2. * k0 << 93 asymmetry /= ((k0 - 2.)*k0 -2.)*sqr(k1)*std::log(k1) + 2.*k0*(k0*(k0 + 1.)*(k0 + 8.) + 2.);
75 asymmetry /= ((k0 - 2.) * k0 - 2.) * sqr(k1) << 94
76 2. * k0 * (k0 * (k0 + 1.) * (k0 << 95 // G4cout<<"energy = "<<GammaEnergy<<" asymmetry = "<<asymmetry<<"\t\t GAM = "<<k0<<G4endl;
77 << 96 if (asymmetry>1.) G4cout<<"ERROR in G4PolarizedComptonModel::ComputeAsymmetryPerAtom"<<G4endl;
78 if(asymmetry > 1.) <<
79 { <<
80 G4ExceptionDescription ed; <<
81 ed << "ERROR in G4PolarizedComptonModel::C <<
82 << " asymmetry = " << asymmetry << "\n" <<
83 G4Exception("G4PolarizedComptonModel::Comp <<
84 JustWarning, ed); <<
85 } <<
86 97
87 return asymmetry; 98 return asymmetry;
88 } 99 }
89 100
90 //....oooOO0OOooo........oooOO0OOooo........oo << 101
91 G4double G4PolarizedComptonModel::ComputeCross 102 G4double G4PolarizedComptonModel::ComputeCrossSectionPerAtom(
92 const G4ParticleDefinition* pd, G4double kin << 103 const G4ParticleDefinition* pd,
93 G4double cut, G4double emax) << 104 G4double kinEnergy,
>> 105 G4double Z,
>> 106 G4double A,
>> 107 G4double cut,
>> 108 G4double emax)
94 { 109 {
95 G4double xs = G4KleinNishinaCompton::Compute << 110 double xs =
96 pd, kinEnergy, Z, A, cut, emax); << 111 G4KleinNishinaCompton::ComputeCrossSectionPerAtom(pd,kinEnergy,
97 G4double polzz = fBeamPolarization.p3() * fT << 112 Z,A,cut,emax);
98 if(polzz > 0.0) << 113 G4double polzz = theBeamPolarization.p3()*theTargetPolarization.z();
99 { << 114 if (polzz > 0.0) {
100 G4double asym = ComputeAsymmetryPerAtom(ki << 115 G4double asym = ComputeAsymmetryPerAtom(kinEnergy, Z);
101 xs *= (1. + polzz * asym); << 116 xs*=(1.+polzz*asym);
102 } 117 }
103 return xs; 118 return xs;
104 } 119 }
105 120
106 //....oooOO0OOooo........oooOO0OOooo........oo 121 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
>> 122
107 void G4PolarizedComptonModel::SampleSecondarie 123 void G4PolarizedComptonModel::SampleSecondaries(
108 std::vector<G4DynamicParticle*>* fvect, cons << 124 std::vector<G4DynamicParticle*>* fvect,
109 const G4DynamicParticle* aDynamicGamma, G4do << 125 const G4MaterialCutsCouple*,
>> 126 const G4DynamicParticle* aDynamicGamma,
>> 127 G4double, G4double)
110 { 128 {
111 // do nothing below the threshold 129 // do nothing below the threshold
112 if(aDynamicGamma->GetKineticEnergy() <= LowE << 130 if(aDynamicGamma->GetKineticEnergy() <= LowEnergyLimit()) { return; }
113 { <<
114 return; <<
115 } <<
116 131
117 const G4Track* aTrack = fParticleChang << 132 const G4Track * aTrack = fParticleChange->GetCurrentTrack();
118 G4VPhysicalVolume* aPVolume = aTrack->GetVol << 133 G4VPhysicalVolume* aPVolume = aTrack->GetVolume();
119 G4LogicalVolume* aLVolume = aPVolume->GetL << 134 G4LogicalVolume* aLVolume = aPVolume->GetLogicalVolume();
120 << 135
121 if(fVerboseLevel >= 1) << 136 if (verboseLevel >= 1) {
122 { << 137 G4cout<<"G4PolarizedComptonModel::SampleSecondaries in "
123 G4cout << "G4PolarizedComptonModel::Sample << 138 << aLVolume->GetName() <<G4endl;
124 << aLVolume->GetName() << G4endl; <<
125 } 139 }
126 G4PolarizationManager* polarizationManager = << 140 G4PolarizationManager * polarizationManager =
127 G4PolarizationManager::GetInstance(); 141 G4PolarizationManager::GetInstance();
128 142
129 // obtain polarization of the beam 143 // obtain polarization of the beam
130 fBeamPolarization = G4StokesVector(aDynamicG << 144 theBeamPolarization = aDynamicGamma->GetPolarization();
131 fBeamPolarization.SetPhoton(); << 145 theBeamPolarization.SetPhoton();
132 146
133 // obtain polarization of the media 147 // obtain polarization of the media
134 G4bool targetIsPolarized = polarizationManag 148 G4bool targetIsPolarized = polarizationManager->IsPolarized(aLVolume);
135 fTargetPolarization = polarizationManager->G << 149 theTargetPolarization =
>> 150 polarizationManager->GetVolumePolarization(aLVolume);
136 151
137 // if beam is linear polarized or target is << 152 // if beam is linear polarized or target is transversely polarized
138 // determine the angle to x-axis 153 // determine the angle to x-axis
139 // (assumes same PRF as in the polarization 154 // (assumes same PRF as in the polarization definition)
>> 155
140 G4ThreeVector gamDirection0 = aDynamicGamma- 156 G4ThreeVector gamDirection0 = aDynamicGamma->GetMomentumDirection();
141 157
142 // transfer fTargetPolarization << 158 // transfere theTargetPolarization
143 // into the gamma frame (problem electron is 159 // into the gamma frame (problem electron is at rest)
144 if(targetIsPolarized) << 160 if (targetIsPolarized) {
145 { << 161 theTargetPolarization.rotateUz(gamDirection0);
146 fTargetPolarization.rotateUz(gamDirection0 <<
147 } 162 }
148 // The scattered gamma energy is sampled acc << 163 // The scattered gamma energy is sampled according to
149 // Klein - Nishina formula. 164 // Klein - Nishina formula.
150 // The random number techniques of Butcher & << 165 // The random number techniques of Butcher & Messel are used
151 // (Nuc Phys 20(1960),15). 166 // (Nuc Phys 20(1960),15).
152 // Note : Effects due to binding of atomic e << 167 // Note : Effects due to binding of atomic electrons are negliged.
153 << 168
154 G4double gamEnergy0 = aDynamicGamma->GetKine 169 G4double gamEnergy0 = aDynamicGamma->GetKineticEnergy();
155 G4double E0_m = gamEnergy0 / electron_ << 170 G4double E0_m = gamEnergy0 / electron_mass_c2 ;
156 171
157 // sample the energy rate of the scattered g << 172 //
158 G4double epsilon, sint2; << 173 // sample the energy rate of the scattered gamma
159 G4double onecost = 0.0; << 174 //
160 G4double Phi = 0.0; << 175
161 G4double greject = 1.0; << 176 G4double epsilon, epsilonsq, onecost, sint2, greject ;
162 G4double cosTeta = 1.0; << 177
163 G4double sinTeta = 0.0; << 178 G4double eps0 = 1./(1. + 2.*E0_m);
164 << 179 G4double epsilon0sq = eps0*eps0;
165 G4double eps0 = 1. / (1. + 2. * E0_m); << 180 G4double alpha1 = - std::log(eps0);
166 G4double epsilon0sq = eps0 * eps0; << 181 G4double alpha2 = 0.5*(1.- epsilon0sq);
167 G4double alpha1 = -G4Log(eps0); << 182
168 G4double alpha2 = alpha1 + 0.5 * (1. - e << 183 G4double polarization =
169 << 184 theBeamPolarization.p3()*theTargetPolarization.p3();
170 G4double polarization = fBeamPolarization.p3 << 185
171 << 186 G4int nloop = 0;
172 CLHEP::HepRandomEngine* rndmEngineMod = G4Ra << 187 do {
173 G4int nloop = 0; << 188 ++nloop;
174 G4bool end = fals << 189 // false interaction if too many iterations
175 << 190 if(nloop > 1000) { return; }
176 G4double rndm[3]; << 191
177 << 192 if ( alpha1/(alpha1+alpha2) > G4UniformRand() ) {
178 do << 193 epsilon = std::exp(-alpha1*G4UniformRand()); // epsilon0**r
179 { << 194 epsilonsq = epsilon*epsilon;
180 do << 195
181 { << 196 } else {
182 ++nloop; << 197 epsilonsq = epsilon0sq + (1.- epsilon0sq)*G4UniformRand();
183 // false interaction if too many iterati << 198 epsilon = std::sqrt(epsilonsq);
184 if(nloop > fLoopLim) << 199 }
185 { << 200
186 PrintWarning(aDynamicGamma, nloop, gre << 201 onecost = (1.- epsilon)/(epsilon*E0_m);
187 "too many iterations"); << 202 sint2 = onecost*(2.-onecost);
188 return; << 203
189 } << 204 G4double gdiced = 2.*(1./epsilon+epsilon);
190 << 205 G4double gdist = 1./epsilon + epsilon - sint2
191 // 3 random numbers to sample scattering << 206 - polarization*(1./epsilon-epsilon)*(1.-onecost);
192 rndmEngineMod->flatArray(3, rndm); << 207
193 << 208 greject = gdist/gdiced;
194 if(alpha1 > alpha2 * rndm[0]) << 209
195 { << 210 if (greject>1) {
196 epsilon = G4Exp(-alpha1 * rndm[1]); << 211 G4cout<<"ERROR in PolarizedComptonScattering::PostStepDoIt\n"
197 } << 212 <<" costh rejection does not work properly: "<<greject
198 else << 213 <<G4endl;
199 { << 214 }
200 epsilon = std::sqrt(epsilon0sq + (1. - << 215 } while (greject < G4UniformRand());
201 } << 216
202 << 217 //
203 onecost = (1. - epsilon) / (epsilon * E0 << 218 // scattered gamma angles. ( Z - axis along the parent gamma)
204 sint2 = onecost * (2. - onecost); << 219 //
205 << 220
206 G4double gdiced = 2. * (1. / epsilon + e << 221 G4double cosTeta = 1. - onecost;
207 G4double gdist = 1. / epsilon + epsilon << 222 G4double sinTeta = std::sqrt (sint2);
208 polarization * (1. / ep << 223 G4double Phi;
209 << 224 do {
210 greject = gdist / gdiced; << 225 ++nloop;
211 << 226 // false interaction if too many iterations
212 if(greject > 1.0) << 227 if(nloop > 1000) { return; }
213 { << 228
214 PrintWarning(aDynamicGamma, nloop, gre << 229 Phi = twopi * G4UniformRand();
215 "theta majoranta wrong"); << 230 G4double gdiced = 1./epsilon + epsilon - sint2
216 } << 231 + std::abs(theBeamPolarization.p3())*
217 // Loop checking, 03-Aug-2015, Vladimir << 232 ( std::abs((1./epsilon-epsilon)*cosTeta*theTargetPolarization.p3())
218 } while(greject < rndm[2]); << 233 +(1.-epsilon)*sinTeta*(std::sqrt(sqr(theTargetPolarization.p1())
219 << 234 + sqr(theTargetPolarization.p2()))))
220 // assuming phi loop successful << 235 +sint2*(std::sqrt(sqr(theBeamPolarization.p1()) +
221 end = true; << 236 sqr(theBeamPolarization.p2())));
222 << 237
223 // scattered gamma angles. ( Z - axis alon << 238 G4double gdist = 1./epsilon + epsilon - sint2
224 cosTeta = 1. - onecost; << 239 + theBeamPolarization.p3()*
225 sinTeta = std::sqrt(sint2); << 240 ((1./epsilon-epsilon)*cosTeta*theTargetPolarization.p3()
226 do << 241 +(1.-epsilon)*sinTeta*(std::cos(Phi)*theTargetPolarization.p1()+
227 { << 242 std::sin(Phi)*theTargetPolarization.p2()))
228 ++nloop; << 243 -sint2*(std::cos(2.*Phi)*theBeamPolarization.p1()
229 << 244 +std::sin(2.*Phi)*theBeamPolarization.p2());
230 // 2 random numbers to sample scattering << 245 greject = gdist/gdiced;
231 rndmEngineMod->flatArray(2, rndm); << 246
232 << 247 if (greject>1.+1.e-10 || greject<0) {
233 // false interaction if too many iterati << 248 G4cout<<"ERROR in PolarizedComptonScattering::PostStepDoIt\n"
234 Phi = twopi * rndm[0]; << 249 <<" phi rejection does not work properly: "<<greject<<G4endl;
235 if(nloop > fLoopLim) << 250 }
236 { << 251 if (greject<1.e-3) {
237 PrintWarning(aDynamicGamma, nloop, gre << 252 G4cout<<"ERROR in PolarizedComptonScattering::PostStepDoIt\n"
238 "too many iterations"); << 253 <<" phi rejection does not work properly: "<<greject<<"\n";
239 return; << 254 G4cout<<" greject="<<greject<<" phi="<<Phi<<" cost="<<cosTeta<<"\n";
240 } << 255 G4cout<<" gdiced="<<gdiced<<" gdist="<<gdist<<"\n";
241 << 256 G4cout<<" eps="<<epsilon<<" 1/eps="<<1./epsilon<<"\n";
242 G4double gdiced = 1. / epsilon + epsilon << 257 }
243 std::abs(fBeamPolariza << 258
244 (std::abs((1. / epsi << 259 } while (greject < G4UniformRand());
245 fTargetPol << 260 G4double dirx = sinTeta*std::cos(Phi), diry = sinTeta*std::sin(Phi),
246 (1. - epsilon) * si << 261 dirz = cosTeta;
247 (std::sqrt(sqr(fT <<
248 sqr(fT <<
249 sint2 * (std::sqrt(sqr <<
250 sqr <<
251 <<
252 G4double gdist = <<
253 1. / epsilon + epsilon - sint2 + <<
254 fBeamPolarization.p3() * <<
255 ((1. / epsilon - epsilon) * cosTeta <<
256 (1. - epsilon) * sinTeta * <<
257 (std::cos(Phi) * fTargetPolarizat <<
258 std::sin(Phi) * fTargetPolarizat <<
259 sint2 * (std::cos(2. * Phi) * fBeamPol <<
260 std::sin(2. * Phi) * fBeamPol <<
261 greject = gdist / gdiced; <<
262 <<
263 if(greject > 1.0) <<
264 { <<
265 PrintWarning(aDynamicGamma, nloop, gre <<
266 "phi majoranta wrong"); <<
267 } <<
268 <<
269 if(greject < 1.e-3) <<
270 { <<
271 PrintWarning(aDynamicGamma, nloop, gre <<
272 "phi loop ineffective"); <<
273 // restart theta loop <<
274 end = false; <<
275 break; <<
276 } <<
277 <<
278 // Loop checking, 03-Aug-2015, Vladimir <<
279 } while(greject < rndm[1]); <<
280 } while(!end); <<
281 G4double dirx = sinTeta * std::cos(Phi); <<
282 G4double diry = sinTeta * std::sin(Phi); <<
283 G4double dirz = cosTeta; <<
284 262
>> 263 //
285 // update G4VParticleChange for the scattere 264 // update G4VParticleChange for the scattered gamma
286 G4ThreeVector gamDirection1(dirx, diry, dirz << 265 //
>> 266
>> 267 G4ThreeVector gamDirection1 ( dirx,diry,dirz );
287 gamDirection1.rotateUz(gamDirection0); 268 gamDirection1.rotateUz(gamDirection0);
288 G4double gamEnergy1 = epsilon * gamEnergy0; << 269 G4double gamEnergy1 = epsilon*gamEnergy0;
289 270
290 G4double edep = 0.0; 271 G4double edep = 0.0;
291 if(gamEnergy1 > lowestSecondaryEnergy) << 272 if(gamEnergy1 > lowestSecondaryEnergy) {
292 { <<
293 fParticleChange->ProposeMomentumDirection( 273 fParticleChange->ProposeMomentumDirection(gamDirection1);
294 fParticleChange->SetProposedKineticEnergy( 274 fParticleChange->SetProposedKineticEnergy(gamEnergy1);
295 } << 275 } else {
296 else <<
297 { <<
298 fParticleChange->ProposeTrackStatus(fStopA 276 fParticleChange->ProposeTrackStatus(fStopAndKill);
299 fParticleChange->SetProposedKineticEnergy( 277 fParticleChange->SetProposedKineticEnergy(0.0);
300 edep = gamEnergy1; 278 edep = gamEnergy1;
301 } 279 }
>> 280
>> 281 //
>> 282 // calculate Stokesvector of final state photon and electron
>> 283 //
>> 284 G4ThreeVector nInteractionFrame =
>> 285 G4PolarizationHelper::GetFrame(gamDirection1,gamDirection0);
302 286
303 // calculate Stokes vector of final state ph << 287 // transfere theBeamPolarization and theTargetPolarization
304 G4ThreeVector nInteractionFrame = <<
305 G4PolarizationHelper::GetFrame(gamDirectio <<
306 <<
307 // transfer fBeamPolarization and fTargetPol <<
308 // into the interaction frame (note electron 288 // into the interaction frame (note electron is in gamma frame)
309 if(fVerboseLevel >= 1) << 289 if (verboseLevel>=1) {
310 { << 290 G4cout << "========================================\n";
311 G4cout << "=============================== << 291 G4cout << " nInteractionFrame = " <<nInteractionFrame<<"\n";
312 G4cout << " nInteractionFrame = " << nInte << 292 G4cout << " GammaDirection0 = " <<gamDirection0<<"\n";
313 G4cout << " GammaDirection0 = " << gamDire << 293 G4cout << " gammaPolarization = " <<theBeamPolarization<<"\n";
314 G4cout << " gammaPolarization = " << fBeam << 294 G4cout << " electronPolarization = " <<theTargetPolarization<<"\n";
315 G4cout << " electronPolarization = " << fT << 295 }
316 } << 296
317 << 297 theBeamPolarization.InvRotateAz(nInteractionFrame,gamDirection0);
318 fBeamPolarization.InvRotateAz(nInteractionFr << 298 theTargetPolarization.InvRotateAz(nInteractionFrame,gamDirection0);
319 fTargetPolarization.InvRotateAz(nInteraction << 299
320 << 300 if (verboseLevel>=1) {
321 if(fVerboseLevel >= 1) << 301 G4cout << "----------------------------------------\n";
322 { << 302 G4cout << " gammaPolarization = " <<theBeamPolarization<<"\n";
323 G4cout << "------------------------------- << 303 G4cout << " electronPolarization = " <<theTargetPolarization<<"\n";
324 G4cout << " gammaPolarization = " << fBeam << 304 G4cout << "----------------------------------------\n";
325 G4cout << " electronPolarization = " << fT <<
326 G4cout << "------------------------------- <<
327 } 305 }
328 306
329 // initialize the polarization transfer matr 307 // initialize the polarization transfer matrix
330 fCrossSectionCalculator->Initialize(epsilon, << 308 crossSectionCalculator->Initialize(epsilon,E0_m,0.,
331 fTargetP << 309 theBeamPolarization,
332 << 310 theTargetPolarization,2);
333 if(gamEnergy1 > lowestSecondaryEnergy) << 311
334 { << 312 if(gamEnergy1 > lowestSecondaryEnergy) {
>> 313
335 // in interaction frame 314 // in interaction frame
336 // calculate polarization transfer to the 315 // calculate polarization transfer to the photon (in interaction plane)
337 fFinalGammaPolarization = fCrossSectionCal << 316 finalGammaPolarization = crossSectionCalculator->GetPol2();
338 if(fVerboseLevel >= 1) << 317 if (verboseLevel>=1) {
339 { << 318 G4cout << " gammaPolarization1 = " <<finalGammaPolarization<<"\n";
340 G4cout << " gammaPolarization1 = " << fF <<
341 } 319 }
342 fFinalGammaPolarization.SetPhoton(); << 320 finalGammaPolarization.SetPhoton();
343 321
344 // translate polarization into particle re 322 // translate polarization into particle reference frame
345 fFinalGammaPolarization.RotateAz(nInteract << 323 finalGammaPolarization.RotateAz(nInteractionFrame,gamDirection1);
346 if(fFinalGammaPolarization.mag() > 1. + 1. << 324 //store polarization vector
347 { << 325 fParticleChange->ProposePolarization(finalGammaPolarization);
348 G4ExceptionDescription ed; << 326 if (finalGammaPolarization.mag() > 1.+1.e-8){
349 ed << "ERROR in Polarizaed Compton Scatt << 327 G4cout<<"ERROR in Polarizaed Compton Scattering !"<<G4endl;
350 ed << "Polarization of final photon more << 328 G4cout<<"Polarization of final photon more than 100%"<<G4endl;
351 ed << fFinalGammaPolarization << 329 G4cout<<finalGammaPolarization<<" mag = "
352 << " mag = " << fFinalGammaPolarizati << 330 <<finalGammaPolarization.mag()<<G4endl;
353 G4Exception("G4PolarizedComptonModel::Sa <<
354 FatalException, ed); <<
355 } 331 }
356 // store polarization vector << 332 if (verboseLevel>=1) {
357 fParticleChange->ProposePolarization(fFina << 333 G4cout << " gammaPolarization1 = " <<finalGammaPolarization<<"\n";
358 if(fVerboseLevel >= 1) << 334 G4cout << " GammaDirection1 = " <<gamDirection1<<"\n";
359 { <<
360 G4cout << " gammaPolarization1 = " << fF <<
361 G4cout << " GammaDirection1 = " << gamDi <<
362 } 335 }
363 } 336 }
364 337
>> 338 //
365 // kinematic of the scattered electron 339 // kinematic of the scattered electron
>> 340 //
366 G4double eKinEnergy = gamEnergy0 - gamEnergy 341 G4double eKinEnergy = gamEnergy0 - gamEnergy1;
367 342
368 if(eKinEnergy > lowestSecondaryEnergy) << 343 if (eKinEnergy > lowestSecondaryEnergy) {
369 { << 344
370 G4ThreeVector eDirection = << 345 G4ThreeVector eDirection =
371 gamEnergy0 * gamDirection0 - gamEnergy1 << 346 gamEnergy0*gamDirection0 - gamEnergy1*gamDirection1;
372 eDirection = eDirection.unit(); 347 eDirection = eDirection.unit();
373 348
374 finalElectronPolarization = fCrossSectionC << 349 finalElectronPolarization = crossSectionCalculator->GetPol3();
375 if(fVerboseLevel >= 1) << 350 if (verboseLevel>=1) {
376 { << 351 G4cout << " electronPolarization1 = "
377 G4cout << " electronPolarization1 = " << << 352 <<finalElectronPolarization<<"\n";
378 << G4endl; <<
379 } 353 }
380 // transfer into particle reference frame 354 // transfer into particle reference frame
381 finalElectronPolarization.RotateAz(nIntera << 355 finalElectronPolarization.RotateAz(nInteractionFrame,eDirection);
382 if(fVerboseLevel >= 1) << 356 if (verboseLevel>=1) {
383 { << 357 G4cout << " electronPolarization1 = "
384 G4cout << " electronPolarization1 = " << << 358 <<finalElectronPolarization<<"\n";
385 << G4endl << " ElecDirection = " << 359 G4cout << " ElecDirection = " <<eDirection<<"\n";
386 } 360 }
387 361
388 // create G4DynamicParticle object for the 362 // create G4DynamicParticle object for the electron.
389 G4DynamicParticle* aElectron = << 363 G4DynamicParticle* aElectron =
390 new G4DynamicParticle(theElectron, eDire << 364 new G4DynamicParticle(theElectron,eDirection,eKinEnergy);
391 // store polarization vector << 365 //store polarization vector
392 if(finalElectronPolarization.mag() > 1. + << 366 if (finalElectronPolarization.mag() > 1.+1.e-8){
393 { << 367 G4cout<<"ERROR in Polarizaed Compton Scattering !"<<G4endl;
394 G4ExceptionDescription ed; << 368 G4cout<<"Polarization of final electron more than 100%"<<G4endl;
395 ed << "ERROR in Polarized Compton Scatte << 369 G4cout<<finalElectronPolarization<<" mag = "
396 ed << "Polarization of final electron mo << 370 <<finalElectronPolarization.mag()<<G4endl;
397 ed << finalElectronPolarization <<
398 << " mag = " << finalElectronPolariza <<
399 G4Exception("G4PolarizedComptonModel::Sa <<
400 FatalException, ed); <<
401 } 371 }
402 aElectron->SetPolarization(finalElectronPo 372 aElectron->SetPolarization(finalElectronPolarization.p1(),
403 finalElectronPo << 373 finalElectronPolarization.p2(),
404 finalElectronPo << 374 finalElectronPolarization.p3());
405 fvect->push_back(aElectron); 375 fvect->push_back(aElectron);
406 } << 376 } else {
407 else << 377 edep += eKinEnergy;
408 { <<
409 edep += eKinEnergy; <<
410 } 378 }
411 // energy balance 379 // energy balance
412 if(edep > 0.0) << 380 if(edep > 0.0) {
413 { <<
414 fParticleChange->ProposeLocalEnergyDeposit 381 fParticleChange->ProposeLocalEnergyDeposit(edep);
415 } 382 }
416 } 383 }
417 384
418 //....oooOO0OOooo........oooOO0OOooo........oo 385 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
419 void G4PolarizedComptonModel::PrintWarning(con << 386
420 G4i << 387
421 G4d <<
422 con <<
423 { <<
424 G4ExceptionDescription ed; <<
425 ed << "Problem of scattering sampling: " << <<
426 << "Niter= " << nloop << " grej= " << gre <<
427 << " cos(theta)= " << 1.0 - onecos << " p <<
428 << "Gamma E(MeV)= " << dp->GetKineticEner <<
429 << " dir= " << dp->GetMomentumDirection() <<
430 << " pol= " << dp->GetPolarization(); <<
431 G4Exception("G4PolarizedComptonModel::Sample <<
432 JustWarning, ed, ""); <<
433 } <<
434 388