Geant4  10.03.p03
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MyKleinNishinaCompton Class Reference

#include <MyKleinNishinaCompton.hh>

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Public Member Functions

 MyKleinNishinaCompton (DetectorConstruction *, const G4ParticleDefinition *p=0, const G4String &nam="myKlein-Nishina")
 
 ~MyKleinNishinaCompton ()
 
virtual G4double CrossSectionPerVolume (const G4Material *, const G4ParticleDefinition *, G4double kinEnergy, G4double cut, G4double emax)
 
virtual void SampleSecondaries (std::vector< G4DynamicParticle * > *, const G4MaterialCutsCouple *, const G4DynamicParticle *, G4double tmin, G4double maxEnergy)
 
void SetCSFactor (G4double factor)
 
- Public Member Functions inherited from G4KleinNishinaCompton
 G4KleinNishinaCompton (const G4ParticleDefinition *p=nullptr, const G4String &nam="Klein-Nishina")
 
virtual ~G4KleinNishinaCompton ()
 
virtual void Initialise (const G4ParticleDefinition *, const G4DataVector &) override
 
virtual void InitialiseLocal (const G4ParticleDefinition *, G4VEmModel *masterModel) override
 
virtual G4double ComputeCrossSectionPerAtom (const G4ParticleDefinition *, G4double kinEnergy, G4double Z, G4double A, G4double cut, G4double emax) override
 
- Public Member Functions inherited from G4VEmModel
 G4VEmModel (const G4String &nam)
 
virtual ~G4VEmModel ()
 
virtual void InitialiseForMaterial (const G4ParticleDefinition *, const G4Material *)
 
virtual void InitialiseForElement (const G4ParticleDefinition *, G4int Z)
 
virtual G4double ComputeDEDXPerVolume (const G4Material *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=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 MinPrimaryEnergy (const G4Material *, const G4ParticleDefinition *, G4double cut=0.0)
 
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)
 

Protected Attributes

DetectorConstruction * fDetector
 
MyKleinNishinaMessenger * fMessenger
 
G4double fCrossSectionFactor
 
- Protected Attributes inherited from G4KleinNishinaCompton
G4ParticleDefinition * theGamma
 
G4ParticleDefinition * theElectron
 
G4ParticleChangeForGamma * fParticleChange
 
G4double lowestSecondaryEnergy
 
- 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
 

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 *)
 
- Static Protected Attributes inherited from G4VEmModel
static const G4double inveplus = 1.0/CLHEP::eplus
 

Detailed Description

Definition at line 43 of file MyKleinNishinaCompton.hh.

Constructor & Destructor Documentation

MyKleinNishinaCompton::MyKleinNishinaCompton ( DetectorConstruction *  det,
const G4ParticleDefinition *  p = 0,
const G4String &  nam = "myKlein-Nishina" 
)

Definition at line 49 of file MyKleinNishinaCompton.cc.

52  :G4KleinNishinaCompton(0,nam), fDetector(det), fMessenger(0)
53 {
54  fCrossSectionFactor = 1.;
55  fMessenger = new MyKleinNishinaMessenger(this);
56 }
MyKleinNishinaCompton::fDetector
DetectorConstruction * fDetector
Definition: MyKleinNishinaCompton.hh:67
G4KleinNishinaCompton::G4KleinNishinaCompton
G4KleinNishinaCompton(const G4ParticleDefinition *p=nullptr, const G4String &nam="Klein-Nishina")
Definition: G4KleinNishinaCompton.cc:65
MyKleinNishinaCompton::fMessenger
MyKleinNishinaMessenger * fMessenger
Definition: MyKleinNishinaCompton.hh:72
MyKleinNishinaCompton::~MyKleinNishinaCompton ( )

Definition at line 60 of file MyKleinNishinaCompton.cc.

61 {
62  delete fMessenger;
63 }
MyKleinNishinaCompton::fMessenger
MyKleinNishinaMessenger * fMessenger
Definition: MyKleinNishinaCompton.hh:72

Member Function Documentation

G4double MyKleinNishinaCompton::CrossSectionPerVolume ( const G4Material *  mat,
const G4ParticleDefinition *  part,
G4double  kinEnergy,
G4double  cut,
G4double  emax 
)
virtual

Reimplemented from G4VEmModel.

Definition at line 67 of file MyKleinNishinaCompton.cc.

72 {
73  G4double xsection = G4VEmModel::CrossSectionPerVolume(mat,part,GammaEnergy);
74 
75  return xsection*fCrossSectionFactor;
76 }
G4VEmModel::CrossSectionPerVolume
virtual G4double CrossSectionPerVolume(const G4Material *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
Definition: G4VEmModel.cc:257
G4double
double G4double
Definition: G4Types.hh:76

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void MyKleinNishinaCompton::SampleSecondaries ( std::vector< G4DynamicParticle * > *  fvect,
const G4MaterialCutsCouple *  ,
const G4DynamicParticle *  aDynamicGamma,
G4double  tmin,
G4double  maxEnergy 
)
virtual

Reimplemented from G4KleinNishinaCompton.

Definition at line 79 of file MyKleinNishinaCompton.cc.

85 {
86  // The scattered gamma energy is sampled according to Klein - Nishina formula.
87  // The random number techniques of Butcher & Messel are used
88  // (Nuc Phys 20(1960),15).
89  // Note : Effects due to binding of atomic electrons are negliged.
90 
91  G4double gamEnergy0 = aDynamicGamma->GetKineticEnergy();
92  G4double E0_m = gamEnergy0 / electron_mass_c2 ;
93 
94  G4ThreeVector gamDirection0 = aDynamicGamma->GetMomentumDirection();
95 
96  //
97  // sample the energy rate of the scattered gamma
98  //
99 
100  G4double epsilon, epsilonsq, onecost, sint2, greject ;
101 
102  G4double eps0 = 1./(1. + 2.*E0_m);
103  G4double eps0sq = eps0*eps0;
104  G4double alpha1 = - log(eps0);
105  G4double alpha2 = 0.5*(1.- eps0sq);
106 
107  do {
108  if ( alpha1/(alpha1+alpha2) > G4UniformRand() ) {
109  epsilon = exp(-alpha1*G4UniformRand()); // eps0**r
110  epsilonsq = epsilon*epsilon;
111 
112  } else {
113  epsilonsq = eps0sq + (1.- eps0sq)*G4UniformRand();
114  epsilon = sqrt(epsilonsq);
115  };
116 
117  onecost = (1.- epsilon)/(epsilon*E0_m);
118  sint2 = onecost*(2.-onecost);
119  greject = 1. - epsilon*sint2/(1.+ epsilonsq);
120 
121  } while (greject < G4UniformRand());
122 
123  //
124  // scattered gamma angles. ( Z - axis along the parent gamma)
125  //
126 
127  G4double cosTeta = 1. - onecost;
128  G4double sinTeta = sqrt (sint2);
129  G4double Phi = twopi * G4UniformRand();
130  G4double dirx = sinTeta*cos(Phi), diry = sinTeta*sin(Phi), dirz = cosTeta;
131 
132  //
133  // update G4VParticleChange for the scattered gamma
134  //
135  // beam regeneration trick : restore incident beam
136 
137  G4ThreeVector gamDirection1 ( dirx,diry,dirz );
138  gamDirection1.rotateUz(gamDirection0);
139  G4double gamEnergy1 = epsilon*gamEnergy0;
140  fParticleChange->SetProposedKineticEnergy(gamEnergy0);
141  fParticleChange->ProposeMomentumDirection(gamDirection0);
142 
143  //
144  // kinematic of the scattered electron
145  //
146 
147  G4double eKinEnergy = gamEnergy0 - gamEnergy1;
148 
149  if(eKinEnergy > DBL_MIN) {
150  G4ThreeVector eDirection
151  = gamEnergy0*gamDirection0 - gamEnergy1*gamDirection1;
152  eDirection = eDirection.unit();
153 
154  // create G4DynamicParticle object for the electron.
155  G4DynamicParticle* dp
156  = new G4DynamicParticle(theElectron,eDirection,eKinEnergy);
157  fvect->push_back(dp);
158  }
159 }
G4KleinNishinaCompton::fParticleChange
G4ParticleChangeForGamma * fParticleChange
Definition: G4KleinNishinaCompton.hh:92
G4DynamicParticle::GetKineticEnergy
G4double GetKineticEnergy() const
G4ParticleChangeForGamma::ProposeMomentumDirection
void ProposeMomentumDirection(G4double Px, G4double Py, G4double Pz)
Definition: G4ParticleChangeForGamma.hh:147
twopi
static constexpr double twopi
Definition: G4SIunits.hh:76
G4UniformRand
#define G4UniformRand()
Definition: Randomize.hh:97
G4DynamicParticle::GetMomentumDirection
const G4ThreeVector & GetMomentumDirection() const
python.hepunit.electron_mass_c2
float electron_mass_c2
Definition: hepunit.py:274
CLHEP::Hep3Vector::unit
Hep3Vector unit() const
DBL_MIN
#define DBL_MIN
Definition: templates.hh:75
G4ParticleChangeForGamma::SetProposedKineticEnergy
void SetProposedKineticEnergy(G4double proposedKinEnergy)
Definition: G4ParticleChangeForGamma.hh:129
G4KleinNishinaCompton::theElectron
G4ParticleDefinition * theElectron
Definition: G4KleinNishinaCompton.hh:91
G4double
double G4double
Definition: G4Types.hh:76
epsilon
double epsilon(double density, double temperature)
Definition: G4DNAElectronHoleRecombination.cc:96

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void MyKleinNishinaCompton::SetCSFactor ( G4double  factor)
inline

Definition at line 67 of file MyKleinNishinaCompton.hh.

67 {fCrossSectionFactor = factor;};

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Member Data Documentation

G4double MyKleinNishinaCompton::fCrossSectionFactor
protected

Definition at line 73 of file MyKleinNishinaCompton.hh.

DetectorConstruction* MyKleinNishinaCompton::fDetector
protected

Definition at line 67 of file MyKleinNishinaCompton.hh.

MyKleinNishinaMessenger* MyKleinNishinaCompton::fMessenger
protected

Definition at line 72 of file MyKleinNishinaCompton.hh.

The documentation for this class was generated from the following files: