Geant4  10.03.p03
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G4LivermoreGammaConversionModelRC Class Reference

#include <G4LivermoreGammaConversionModelRC.hh>

Inheritance diagram for G4LivermoreGammaConversionModelRC:
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Collaboration diagram for G4LivermoreGammaConversionModelRC:
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Public Member Functions

 G4LivermoreGammaConversionModelRC (const G4ParticleDefinition *p=0, const G4String &nam="LivermoreGammaConversionRC_1")
 
virtual ~G4LivermoreGammaConversionModelRC ()
 
virtual void Initialise (const G4ParticleDefinition *, const G4DataVector &)
 
virtual void InitialiseLocal (const G4ParticleDefinition *, G4VEmModel *masterModel)
 
virtual void InitialiseForElement (const G4ParticleDefinition *, G4int Z)
 
virtual G4double ComputeCrossSectionPerAtom (const G4ParticleDefinition *, G4double kinEnergy, G4double Z, G4double A=0, G4double cut=0, G4double emax=DBL_MAX)
 
virtual void SampleSecondaries (std::vector< G4DynamicParticle * > *, const G4MaterialCutsCouple *, const G4DynamicParticle *, G4double tmin, G4double maxEnergy)
 
virtual G4double MinPrimaryEnergy (const G4Material *, const G4ParticleDefinition *, G4double)
 
- Public Member Functions inherited from G4VEmModel
 G4VEmModel (const G4String &nam)
 
virtual ~G4VEmModel ()
 
virtual void InitialiseForMaterial (const G4ParticleDefinition *, const G4Material *)
 
virtual G4double ComputeDEDXPerVolume (const G4Material *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=DBL_MAX)
 
virtual G4double CrossSectionPerVolume (const G4Material *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
virtual G4double GetPartialCrossSection (const G4Material *, G4int level, const G4ParticleDefinition *, G4double kineticEnergy)
 
virtual G4double ComputeCrossSectionPerShell (const G4ParticleDefinition *, G4int Z, G4int shellIdx, G4double kinEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
virtual G4double ChargeSquareRatio (const G4Track &)
 
virtual G4double GetChargeSquareRatio (const G4ParticleDefinition *, const G4Material *, G4double kineticEnergy)
 
virtual G4double GetParticleCharge (const G4ParticleDefinition *, const G4Material *, G4double kineticEnergy)
 
virtual void StartTracking (G4Track *)
 
virtual void CorrectionsAlongStep (const G4MaterialCutsCouple *, const G4DynamicParticle *, G4double &eloss, G4double &niel, G4double length)
 
virtual G4double Value (const G4MaterialCutsCouple *, const G4ParticleDefinition *, G4double kineticEnergy)
 
virtual G4double MinEnergyCut (const G4ParticleDefinition *, const G4MaterialCutsCouple *)
 
virtual void SetupForMaterial (const G4ParticleDefinition *, const G4Material *, G4double kineticEnergy)
 
virtual void DefineForRegion (const G4Region *)
 
virtual void ModelDescription (std::ostream &outFile) const
 
void InitialiseElementSelectors (const G4ParticleDefinition *, const G4DataVector &)
 
std::vector
< G4EmElementSelector * > * 		GetElementSelectors ()
 
void SetElementSelectors (std::vector< G4EmElementSelector * > *)
 
virtual G4double ComputeDEDX (const G4MaterialCutsCouple *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=DBL_MAX)
 
G4double CrossSection (const G4MaterialCutsCouple *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
G4double ComputeMeanFreePath (const G4ParticleDefinition *, G4double kineticEnergy, const G4Material *, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
G4double ComputeCrossSectionPerAtom (const G4ParticleDefinition *, const G4Element *, G4double kinEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
G4int SelectIsotopeNumber (const G4Element *)
 
const G4Element * SelectRandomAtom (const G4MaterialCutsCouple *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
const G4Element * SelectRandomAtom (const G4Material *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
G4int SelectRandomAtomNumber (const G4Material *)
 
void SetParticleChange (G4VParticleChange *, G4VEmFluctuationModel *f=nullptr)
 
void SetCrossSectionTable (G4PhysicsTable *, G4bool isLocal)
 
G4ElementData * GetElementData ()
 
G4PhysicsTable * GetCrossSectionTable ()
 
G4VEmFluctuationModel * GetModelOfFluctuations ()
 
G4VEmAngularDistribution * GetAngularDistribution ()
 
void SetAngularDistribution (G4VEmAngularDistribution *)
 
G4double HighEnergyLimit () const
 
G4double LowEnergyLimit () const
 
G4double HighEnergyActivationLimit () const
 
G4double LowEnergyActivationLimit () const
 
G4double PolarAngleLimit () const
 
G4double SecondaryThreshold () const
 
G4bool LPMFlag () const
 
G4bool DeexcitationFlag () const
 
G4bool ForceBuildTableFlag () const
 
G4bool UseAngularGeneratorFlag () const
 
void SetAngularGeneratorFlag (G4bool)
 
void SetHighEnergyLimit (G4double)
 
void SetLowEnergyLimit (G4double)
 
void SetActivationHighEnergyLimit (G4double)
 
void SetActivationLowEnergyLimit (G4double)
 
G4bool IsActive (G4double kinEnergy)
 
void SetPolarAngleLimit (G4double)
 
void SetSecondaryThreshold (G4double)
 
void SetLPMFlag (G4bool val)
 
void SetDeexcitationFlag (G4bool val)
 
void SetForceBuildTable (G4bool val)
 
void SetFluctuationFlag (G4bool val)
 
void SetMasterThread (G4bool val)
 
G4bool IsMaster () const
 
G4double MaxSecondaryKinEnergy (const G4DynamicParticle *dynParticle)
 
const G4String & GetName () const
 
void SetCurrentCouple (const G4MaterialCutsCouple *)
 
const G4Element * GetCurrentElement () const
 
const G4Isotope * GetCurrentIsotope () const
 
G4bool IsLocked () const
 
void SetLocked (G4bool)
 

Additional Inherited Members

- Protected Member Functions inherited from G4VEmModel
G4ParticleChangeForLoss * GetParticleChangeForLoss ()
 
G4ParticleChangeForGamma * GetParticleChangeForGamma ()
 
virtual G4double MaxSecondaryEnergy (const G4ParticleDefinition *, G4double kineticEnergy)
 
const G4MaterialCutsCouple * CurrentCouple () const
 
void SetCurrentElement (const G4Element *)
 
- Protected Attributes inherited from G4VEmModel
G4ElementData * fElementData
 
G4VParticleChange * pParticleChange
 
G4PhysicsTable * xSectionTable
 
const std::vector< G4double > * theDensityFactor
 
const std::vector< G4int > * theDensityIdx
 
size_t idxTable
 
G4bool lossFlucFlag
 
- Static Protected Attributes inherited from G4VEmModel
static const G4double inveplus = 1.0/CLHEP::eplus
 

Detailed Description

Definition at line 40 of file G4LivermoreGammaConversionModelRC.hh.

Constructor & Destructor Documentation

G4LivermoreGammaConversionModelRC::G4LivermoreGammaConversionModelRC ( const G4ParticleDefinition *  p = 0,
const G4String &  nam = "LivermoreGammaConversionRC_1" 
)

Definition at line 51 of file G4LivermoreGammaConversionModelRC.cc.

52 :G4VEmModel(nam),isInitialised(false),smallEnergy(2.*MeV)
53 {
54  fParticleChange = nullptr;
55 
56  lowEnergyLimit = 2.0*electron_mass_c2;
57 
58  verboseLevel= 0;
59  // Verbosity scale for debugging purposes:
60  // 0 = nothing
61  // 1 = calculation of cross sections, file openings...
62  // 2 = entering in methods
63 
64  if(verboseLevel > 0)
65  {
66  G4cout << "G4LivermoreGammaConversionModelRC is constructed " << G4endl;
67  }
68 }
G4VEmModel::G4VEmModel
G4VEmModel(const G4String &nam)
Definition: G4VEmModel.cc:68
G4cout
G4GLOB_DLL std::ostream G4cout
python.hepunit.electron_mass_c2
float electron_mass_c2
Definition: hepunit.py:274
G4endl
#define G4endl
Definition: G4ios.hh:61
MeV
static constexpr double MeV
Definition: G4SIunits.hh:214
G4LivermoreGammaConversionModelRC::~G4LivermoreGammaConversionModelRC ( )
virtual

Definition at line 72 of file G4LivermoreGammaConversionModelRC.cc.

73 {
74  if(IsMaster()) {
75  for(G4int i=0; i<maxZ; ++i) {
76  if(data[i]) {
77  delete data[i];
78  data[i] = 0;
79  }
80  }
81  }
82 }
G4VEmModel::IsMaster
G4bool IsMaster() const
Definition: G4VEmModel.hh:725
G4int
int G4int
Definition: G4Types.hh:78
data
const XML_Char const XML_Char * data
Definition: expat.h:268

Member Function Documentation

G4double G4LivermoreGammaConversionModelRC::ComputeCrossSectionPerAtom ( const G4ParticleDefinition *  ,
G4double  kinEnergy,
G4double  Z,
G4double  A = 0,
G4double  cut = 0,
G4double  emax = DBL_MAX 
)
virtual

Reimplemented from G4VEmModel.

Definition at line 219 of file G4LivermoreGammaConversionModelRC.cc.

223 {
224  if (verboseLevel > 1)
225  {
226  G4cout << "Calling ComputeCrossSectionPerAtom() of G4LivermoreGammaConversionModelRC"
227  << G4endl;
228  }
229 
230  if (GammaEnergy < lowEnergyLimit) { return 0.0; }
231 
232  G4double xs = 0.0;
233 
234  G4int intZ=G4int(Z);
235 
236  if(intZ < 1 || intZ > maxZ) { return xs; }
237 
238  G4LPhysicsFreeVector* pv = data[intZ];
239 
240  // if element was not initialised
241  // do initialisation safely for MT mode
242  if(!pv)
243  {
244  InitialiseForElement(0, intZ);
245  pv = data[intZ];
246  if(!pv) { return xs; }
247  }
248  // x-section is taken from the table
249  xs = pv->Value(GammaEnergy);
250 
251  if(verboseLevel > 0)
252  {
253  G4int n = pv->GetVectorLength() - 1;
254  G4cout << "****** DEBUG: tcs value for Z=" << Z << " at energy (MeV)="
255  << GammaEnergy/MeV << G4endl;
256  G4cout << " cs (Geant4 internal unit)=" << xs << G4endl;
257  G4cout << " -> first cs value in EADL data file (iu) =" << (*pv)[0] << G4endl;
258  G4cout << " -> last cs value in EADL data file (iu) =" << (*pv)[n] << G4endl;
259  G4cout << "*********************************************************" << G4endl;
260  }
261 
262  return xs;
263 
264 }
G4PhysicsVector::GetVectorLength
size_t GetVectorLength() const
G4int
int G4int
Definition: G4Types.hh:78
data
const XML_Char const XML_Char * data
Definition: expat.h:268
G4cout
G4GLOB_DLL std::ostream G4cout
n
const G4int n
Definition: G4UrQMD1_3Interface.hh:144
G4PhysicsVector::Value
G4double Value(G4double theEnergy, size_t &lastidx) const
Definition: G4PhysicsVector.cc:498
G4endl
#define G4endl
Definition: G4ios.hh:61
MeV
static constexpr double MeV
Definition: G4SIunits.hh:214
G4double
double G4double
Definition: G4Types.hh:76
Z
G4int Z
Definition: G4ParticleHPJENDLHEData.cc:262
G4LivermoreGammaConversionModelRC::InitialiseForElement
virtual void InitialiseForElement(const G4ParticleDefinition *, G4int Z)
Definition: G4LivermoreGammaConversionModelRC.cc:604

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void G4LivermoreGammaConversionModelRC::Initialise ( const G4ParticleDefinition *  particle,
const G4DataVector &  cuts 
)
virtual

Implements G4VEmModel.

Definition at line 86 of file G4LivermoreGammaConversionModelRC.cc.

89 {
90  if (verboseLevel > 1)
91  {
92  G4cout << "Calling Initialise() of G4LivermoreGammaConversionModelRC."
93  << G4endl
94  << "Energy range: "
95  << LowEnergyLimit() / MeV << " MeV - "
96  << HighEnergyLimit() / GeV << " GeV"
97  << G4endl;
98  }
99 
100  if(IsMaster())
101  {
102 
103  // Initialise element selector
104 
105  InitialiseElementSelectors(particle, cuts);
106 
107  // Access to elements
108 
109  char* path = getenv("G4LEDATA");
110 
111  G4ProductionCutsTable* theCoupleTable =
112  G4ProductionCutsTable::GetProductionCutsTable();
113 
114  G4int numOfCouples = theCoupleTable->GetTableSize();
115 
116  for(G4int i=0; i<numOfCouples; ++i)
117  {
118  const G4Material* material =
119  theCoupleTable->GetMaterialCutsCouple(i)->GetMaterial();
120  const G4ElementVector* theElementVector = material->GetElementVector();
121  G4int nelm = material->GetNumberOfElements();
122 
123  for (G4int j=0; j<nelm; ++j)
124  {
125  G4int Z = (G4int)(*theElementVector)[j]->GetZ();
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 }
G4VEmModel::LowEnergyLimit
G4double LowEnergyLimit() const
Definition: G4VEmModel.hh:643
G4ElementVector
std::vector< G4Element * > G4ElementVector
Definition: G4ElementVector.hh:44
G4VEmModel::InitialiseElementSelectors
void InitialiseElementSelectors(const G4ParticleDefinition *, const G4DataVector &)
Definition: G4VEmModel.cc:146
G4VEmModel::HighEnergyLimit
G4double HighEnergyLimit() const
Definition: G4VEmModel.hh:636
G4VEmModel::IsMaster
G4bool IsMaster() const
Definition: G4VEmModel.hh:725
G4Material::GetElementVector
const G4ElementVector * GetElementVector() const
Definition: G4Material.hh:190
G4int
int G4int
Definition: G4Types.hh:78
data
const XML_Char const XML_Char * data
Definition: expat.h:268
eplot.material
string material
Definition: eplot.py:19
G4cout
G4GLOB_DLL std::ostream G4cout
G4ProductionCutsTable::GetProductionCutsTable
static G4ProductionCutsTable * GetProductionCutsTable()
Definition: G4ProductionCutsTable.cc:63
G4ProductionCutsTable::GetMaterialCutsCouple
const G4MaterialCutsCouple * GetMaterialCutsCouple(G4int i) const
Definition: G4ProductionCutsTable.hh:262
GeV
static constexpr double GeV
Definition: G4SIunits.hh:217
G4endl
#define G4endl
Definition: G4ios.hh:61
MeV
static constexpr double MeV
Definition: G4SIunits.hh:214
G4Material::GetNumberOfElements
size_t GetNumberOfElements() const
Definition: G4Material.hh:186
G4VEmModel::GetParticleChangeForGamma
G4ParticleChangeForGamma * GetParticleChangeForGamma()
Definition: G4VEmModel.cc:132
Z
G4int Z
Definition: G4ParticleHPJENDLHEData.cc:262
G4MaterialCutsCouple::GetMaterial
const G4Material * GetMaterial() const
Definition: G4MaterialCutsCouple.hh:150

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void G4LivermoreGammaConversionModelRC::InitialiseForElement ( const G4ParticleDefinition *  ,
G4int  Z 
)
virtual

Reimplemented from G4VEmModel.

Definition at line 604 of file G4LivermoreGammaConversionModelRC.cc.

607 {
608  G4AutoLock l(&LivermoreGammaConversionModelRCMutex);
609  // G4cout << "G4LivermoreGammaConversionModelRC::InitialiseForElement Z= "
610  // << Z << G4endl;
611  if(!data[Z]) { ReadData(Z); }
612  l.unlock();
613 }
data
const XML_Char const XML_Char * data
Definition: expat.h:268
Z
G4int Z
Definition: G4ParticleHPJENDLHEData.cc:262

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void G4LivermoreGammaConversionModelRC::InitialiseLocal ( const G4ParticleDefinition *  ,
G4VEmModel *  masterModel 
)
virtual

Reimplemented from G4VEmModel.

Definition at line 139 of file G4LivermoreGammaConversionModelRC.cc.

141 {
142  SetElementSelectors(masterModel->GetElementSelectors());
143 }
G4VEmModel::GetElementSelectors
std::vector< G4EmElementSelector * > * GetElementSelectors()
Definition: G4VEmModel.hh:809
G4VEmModel::SetElementSelectors
void SetElementSelectors(std::vector< G4EmElementSelector * > *)
Definition: G4VEmModel.hh:817

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G4double G4LivermoreGammaConversionModelRC::MinPrimaryEnergy ( const G4Material *  ,
const G4ParticleDefinition *  ,
G4double   
)
virtual

Reimplemented from G4VEmModel.

Definition at line 148 of file G4LivermoreGammaConversionModelRC.cc.

151 {
152  return lowEnergyLimit;
153 }
void G4LivermoreGammaConversionModelRC::SampleSecondaries ( std::vector< G4DynamicParticle * > *  fvect,
const G4MaterialCutsCouple *  couple,
const G4DynamicParticle *  aDynamicGamma,
G4double  tmin,
G4double  maxEnergy 
)
virtual

Implements G4VEmModel.

Definition at line 268 of file G4LivermoreGammaConversionModelRC.cc.

273 {
274 
275 // The energies of the e+ e- secondaries are sampled using the Bethe - Heitler
276 // cross sections with Coulomb correction. A modified version of the random
277 // number techniques of Butcher & Messel is used (Nuc Phys 20(1960),15).
278 
279 // Note 1 : Effects due to the breakdown of the Born approximation at low
280 // energy are ignored.
281 // Note 2 : The differential cross section implicitly takes account of
282 // pair creation in both nuclear and atomic electron fields. However triplet
283 // prodution is not generated.
284 
285  if (verboseLevel > 1) {
286  G4cout << "Calling SampleSecondaries() of G4LivermoreGammaConversionModelRC"
287  << G4endl;
288  }
289 
290  G4double photonEnergy = aDynamicGamma->GetKineticEnergy();
291  G4ParticleMomentum photonDirection = aDynamicGamma->GetMomentumDirection();
292 
293  G4double epsilon ;
294  G4double epsilon0Local = electron_mass_c2 / photonEnergy ;
295 
296  G4double electronTotEnergy = 0.0;
297  G4double positronTotEnergy = 0.0;
298  G4double HardPhotonEnergy = 0.0;
299 
300 
301  // Do it fast if photon energy < 2. MeV
302  if (photonEnergy < smallEnergy )
303  {
304  epsilon = epsilon0Local + (0.5 - epsilon0Local) * G4UniformRand();
305  if (G4UniformRand() > 0.5)
306  {
307  electronTotEnergy = (1. - epsilon) * photonEnergy;
308  positronTotEnergy = epsilon * photonEnergy;
309  }
310  else
311  {
312  positronTotEnergy = (1. - epsilon) * photonEnergy;
313  electronTotEnergy = epsilon * photonEnergy;
314  }
315  }
316  else
317  {
318  // Select randomly one element in the current material
319 
320  const G4ParticleDefinition* particle = aDynamicGamma->GetDefinition();
321  const G4Element* element = SelectRandomAtom(couple,particle,photonEnergy);
322 
323  if (element == 0)
324  {
325  G4cout << "G4LivermoreGammaConversionModelRC::SampleSecondaries - element = 0"
326  << G4endl;
327  return;
328  }
329  G4IonisParamElm* ionisation = element->GetIonisation();
330  if (ionisation == 0)
331  {
332  G4cout << "G4LivermoreGammaConversionModelRC::SampleSecondaries - ionisation = 0"
333  << G4endl;
334  return;
335  }
336 
337  // Extract Coulomb factor for this Element
338  G4double fZ = 8. * (ionisation->GetlogZ3());
339  if (photonEnergy > 50. * MeV) fZ += 8. * (element->GetfCoulomb());
340 
341  // Limits of the screening variable
342  G4double screenFactor = 136. * epsilon0Local / (element->GetIonisation()->GetZ3()) ;
343  G4double screenMax = G4Exp ((42.24 - fZ)/8.368) - 0.952 ;
344  G4double screenMin = std::min(4.*screenFactor,screenMax) ;
345 
346  // Limits of the energy sampling
347  G4double epsilon1 = 0.5 - 0.5 * std::sqrt(1. - screenMin / screenMax) ;
348  G4double epsilonMin = std::max(epsilon0Local,epsilon1);
349  G4double epsilonRange = 0.5 - epsilonMin ;
350 
351  // Sample the energy rate of the created electron (or positron)
352  G4double screen;
353  G4double gReject ;
354 
355  G4double f10 = ScreenFunction1(screenMin) - fZ;
356  G4double f20 = ScreenFunction2(screenMin) - fZ;
357  G4double normF1 = std::max(f10 * epsilonRange * epsilonRange,0.);
358  G4double normF2 = std::max(1.5 * f20,0.);
359 
360  // Method for Radiative corrections
361 
362  G4double a=393.3750918, b=115.3070201, c=810.6428451, d=19.96497475, e=1016.874592, f=1.936685510,
363  gLocal=751.2140962, h=0.099751048, i=299.9466339, j=0.002057250, k=49.81034926;
364  G4double aa=-18.6371131, bb=-1729.95248, cc=9450.971186, dd=106336.0145, ee=55143.09287, ff=-117602.840,
365  gg=-721455.467, hh=693957.8635, ii=156266.1085, jj=533209.9347;
366  G4double Rechazo = 0.;
367  G4double logepsMin = log(epsilonMin);
368  G4double NormaRC = a + b*logepsMin + c/logepsMin + d*pow(logepsMin,2.) + e/pow(logepsMin,2.) + f*pow(logepsMin,3.) +
369  gLocal/pow(logepsMin,3.) + h*pow(logepsMin,4.) + i/pow(logepsMin,4.) + j*pow(logepsMin,5.) +
370  k/pow(logepsMin,5.);
371 
372  G4double HardPhotonThreshold = 0.08;
373  G4double r1, r2, r3, beta=0, gbeta, sigt = 582.068, sigh, rejet;
374  // , Pi = 2.*acos(0.);
375  G4double cg = (11./2.)/(G4Exp(-11.*HardPhotonThreshold/2.)-G4Exp(-11./2.));
376 
377  r1 = G4UniformRand();
378  sigh = 1028.58*G4Exp(-HardPhotonThreshold/0.09033) + 136.63; // sigma hard
379 
380 
381  if (r1 > 1.- sigh/sigt) {
382  r2 = G4UniformRand();
383  rejet = 0.;
384  while (r2 > rejet) {
385  r3 = G4UniformRand();
386  beta = (-2./11.)*log(G4Exp(-0.08*11./2.)-r3*11./(2.*cg));
387  gbeta = G4Exp(-11.*beta/2.);
388  rejet = fbeta(beta)/(8000.*gbeta);
389  }
390  HardPhotonEnergy = beta * photonEnergy;
391  }
392  else{
393  HardPhotonEnergy = 0.;
394  }
395 
396  photonEnergy -= HardPhotonEnergy;
397 
398  do
399  {
400  do
401  {
402  if (normF1 / (normF1 + normF2) > G4UniformRand() )
403  {
404  epsilon = 0.5 - epsilonRange * std::pow(G4UniformRand(), 0.333333) ;
405  screen = screenFactor / (epsilon * (1. - epsilon));
406  gReject = (ScreenFunction1(screen) - fZ) / f10 ;
407  }
408  else
409  {
410  epsilon = epsilonMin + epsilonRange * G4UniformRand();
411  screen = screenFactor / (epsilon * (1 - epsilon));
412  gReject = (ScreenFunction2(screen) - fZ) / f20 ;
413  }
414  } while ( gReject < G4UniformRand() );
415 
416 
417 
418  if (G4UniformRand()>0.5) epsilon = (1. - epsilon); // Extención de Epsilon hasta 1.
419 
420  G4double logepsilon = log(epsilon);
421  G4double deltaP_R1 = 1. + (a + b*logepsilon + c/logepsilon + d*pow(logepsilon,2.) + e/pow(logepsilon,2.) +
422  f*pow(logepsilon,3.) + gLocal/pow(logepsilon,3.) + h*pow(logepsilon,4.) + i/pow(logepsilon,4.) +
423  j*pow(logepsilon,5.) + k/pow(logepsilon,5.))/100.;
424  G4double deltaP_R2 = 1.+((aa + cc*logepsilon + ee*pow(logepsilon,2.) + gg*pow(logepsilon,3.) + ii*pow(logepsilon,4.))
425  / (1. + bb*logepsilon + dd*pow(logepsilon,2.) + ff*pow(logepsilon,3.) + hh*pow(logepsilon,4.)
426  + jj*pow(logepsilon,5.) ))/100.;
427 
428  if (epsilon <= 0.5)
429  {
430  Rechazo = deltaP_R1/NormaRC;
431  }
432  else
433  {
434  Rechazo = deltaP_R2/NormaRC;
435  }
436  //G4cout << Rechazo << " " << NormaRC << " " << epsilon << G4endl;
437 
438  } while (Rechazo < G4UniformRand() );
439 
440  electronTotEnergy = (1. - epsilon) * photonEnergy;
441  positronTotEnergy = epsilon * photonEnergy;
442 
443  } // End of epsilon sampling
444 
445 
446  // Fix charges randomly
447 
448  // Scattered electron (positron) angles. ( Z - axis along the parent photon)
449  // Universal distribution suggested by L. Urban (Geant3 manual (1993) Phys211),
450  // derived from Tsai distribution (Rev. Mod. Phys. 49, 421 (1977)
451 
452  G4double u;
453  const G4double a1 = 0.625;
454  G4double a2 = 3. * a1;
455  // G4double d = 27. ;
456 
457  // if (9. / (9. + d) > G4UniformRand())
458  if (0.25 > G4UniformRand())
459  {
460  u = - G4Log(G4UniformRand() * G4UniformRand()) / a1 ;
461  }
462  else
463  {
464  u = - G4Log(G4UniformRand() * G4UniformRand()) / a2 ;
465  }
466 
467  G4double thetaEle = u*electron_mass_c2/electronTotEnergy;
468  G4double thetaPos = u*electron_mass_c2/positronTotEnergy;
469  G4double phi = twopi * G4UniformRand();
470 
471  G4double dxEle= std::sin(thetaEle)*std::cos(phi),dyEle= std::sin(thetaEle)*std::sin(phi),dzEle=std::cos(thetaEle);
472  G4double dxPos=-std::sin(thetaPos)*std::cos(phi),dyPos=-std::sin(thetaPos)*std::sin(phi),dzPos=std::cos(thetaPos);
473 
474 
475  // Kinematics of the created pair:
476  // the electron and positron are assumed to have a symetric angular
477  // distribution with respect to the Z axis along the parent photon
478 
479  G4double electronKineEnergy = std::max(0.,electronTotEnergy - electron_mass_c2) ;
480 
481  G4ThreeVector electronDirection (dxEle, dyEle, dzEle);
482  electronDirection.rotateUz(photonDirection);
483 
484  G4DynamicParticle* particle1 = new G4DynamicParticle (G4Electron::Electron(),
485  electronDirection,
486  electronKineEnergy);
487 
488  // The e+ is always created
489  G4double positronKineEnergy = std::max(0.,positronTotEnergy - electron_mass_c2) ;
490 
491  G4ThreeVector positronDirection (dxPos, dyPos, dzPos);
492  positronDirection.rotateUz(photonDirection);
493 
494  // Create G4DynamicParticle object for the particle2
495  G4DynamicParticle* particle2 = new G4DynamicParticle(G4Positron::Positron(),
496  positronDirection,
497  positronKineEnergy);
498  // Fill output vector
499  fvect->push_back(particle1);
500  fvect->push_back(particle2);
501 
502  if (HardPhotonEnergy > 0.)
503  {
504  G4double thetaHardPhoton = u*electron_mass_c2/HardPhotonEnergy;
505  phi = twopi * G4UniformRand();
506  G4double dxHardP= std::sin(thetaHardPhoton)*std::cos(phi);
507  G4double dyHardP= std::sin(thetaHardPhoton)*std::sin(phi);
508  G4double dzHardP =std::cos(thetaHardPhoton);
509 
510  G4ThreeVector hardPhotonDirection (dxHardP, dyHardP, dzHardP);
511  hardPhotonDirection.rotateUz(photonDirection);
512  G4DynamicParticle* particle3 = new G4DynamicParticle (G4Gamma::Gamma(),
513  hardPhotonDirection,
514  HardPhotonEnergy);
515  fvect->push_back(particle3);
516  }
517 
518  // kill incident photon
519  fParticleChange->SetProposedKineticEnergy(0.);
520  fParticleChange->ProposeTrackStatus(fStopAndKill);
521 
522 }
G4DynamicParticle::GetKineticEnergy
G4double GetKineticEnergy() const
a
std::vector< ExP01TrackerHit * > a
Definition: ExP01Classes.hh:33
G4Element::GetfCoulomb
G4double GetfCoulomb() const
Definition: G4Element.hh:191
G4DynamicParticle::GetDefinition
G4ParticleDefinition * GetDefinition() const
twopi
static constexpr double twopi
Definition: G4SIunits.hh:76
bb
static ulg bb
Definition: csz_inflate.cc:344
test.b
tuple b
Definition: test.py:12
G4UniformRand
#define G4UniformRand()
Definition: Randomize.hh:97
G4cout
G4GLOB_DLL std::ostream G4cout
G4DynamicParticle::GetMomentumDirection
const G4ThreeVector & GetMomentumDirection() const
python.hepunit.electron_mass_c2
float electron_mass_c2
Definition: hepunit.py:274
G4Gamma::Gamma
static G4Gamma * Gamma()
Definition: G4Gamma.cc:86
G4IonisParamElm::GetlogZ3
G4double GetlogZ3() const
Definition: G4IonisParamElm.hh:63
G4Log
G4double G4Log(G4double x)
Definition: G4Log.hh:230
G4Exp
G4double G4Exp(G4double initial_x)
Exponential Function double precision.
Definition: G4Exp.hh:183
G4Positron::Positron
static G4Positron * Positron()
Definition: G4Positron.cc:94
G4INCL::Math::max
T max(const T t1, const T t2)
brief Return the largest of the two arguments
Definition: G4INCLGlobals.hh:112
G4Element::GetIonisation
G4IonisParamElm * GetIonisation() const
Definition: G4Element.hh:199
G4INCL::Math::min
T min(const T t1, const T t2)
brief Return the smallest of the two arguments
Definition: G4INCLGlobals.hh:117
fStopAndKill
Definition: G4TrackStatus.hh:56
G4Electron::Electron
static G4Electron * Electron()
Definition: G4Electron.cc:94
G4ParticleChangeForGamma::SetProposedKineticEnergy
void SetProposedKineticEnergy(G4double proposedKinEnergy)
Definition: G4ParticleChangeForGamma.hh:129
G4endl
#define G4endl
Definition: G4ios.hh:61
MeV
static constexpr double MeV
Definition: G4SIunits.hh:214
G4double
double G4double
Definition: G4Types.hh:76
G4VParticleChange::ProposeTrackStatus
void ProposeTrackStatus(G4TrackStatus status)
test.c
tuple c
Definition: test.py:13
G4IonisParamElm::GetZ3
G4double GetZ3() const
Definition: G4IonisParamElm.hh:61
epsilon
double epsilon(double density, double temperature)
Definition: G4DNAElectronHoleRecombination.cc:96
G4VEmModel::SelectRandomAtom
const G4Element * SelectRandomAtom(const G4MaterialCutsCouple *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
Definition: G4VEmModel.hh:544

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