Geant4  10.03.p01
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G4XrayRayleighModel Class Reference

#include <G4XrayRayleighModel.hh>

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Public Member Functions

 G4XrayRayleighModel (const G4ParticleDefinition *p=0, const G4String &nam="XrayRayleigh")
 
virtual ~G4XrayRayleighModel ()
 
virtual void Initialise (const G4ParticleDefinition *, const G4DataVector &)
 
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)
 
- Public Member Functions inherited from G4VEmModel
 G4VEmModel (const G4String &nam)
 
virtual ~G4VEmModel ()
 
virtual void InitialiseLocal (const G4ParticleDefinition *, G4VEmModel *masterModel)
 
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 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 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 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

G4ParticleChangeForGamma * fParticleChange
 
- Protected Attributes inherited from G4VEmModel
G4ElementData * fElementData
 
G4VParticleChange * pParticleChange
 
G4PhysicsTable * xSectionTable
 
const std::vector< G4double > * theDensityFactor
 
const std::vector< G4int > * theDensityIdx
 
size_t idxTable
 

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 42 of file G4XrayRayleighModel.hh.

Constructor & Destructor Documentation

G4XrayRayleighModel::G4XrayRayleighModel ( const G4ParticleDefinition *  p = 0,
const G4String &  nam = "XrayRayleigh" 
)
explicit

Definition at line 49 of file G4XrayRayleighModel.cc.

51  :G4VEmModel(nam),isInitialised(false)
52 {
53  fParticleChange = 0;
54  lowEnergyLimit = 250*eV;
55  highEnergyLimit = 10.*MeV;
56  fFormFactor = 0.0;
57 
58  // SetLowEnergyLimit(lowEnergyLimit);
59  SetHighEnergyLimit(highEnergyLimit);
60  //
61  verboseLevel= 0;
62  // Verbosity scale:
63  // 0 = nothing
64  // 1 = warning for energy non-conservation
65  // 2 = details of energy budget
66  // 3 = calculation of cross sections, file openings, sampling of atoms
67  // 4 = entering in methods
68 
69  if(verboseLevel > 0)
70  {
71  G4cout << "Xray Rayleigh is constructed " << G4endl
72  << "Energy range: "
73  << lowEnergyLimit / eV << " eV - "
74  << highEnergyLimit / MeV << " MeV"
75  << G4endl;
76  }
77 }
G4XrayRayleighModel::fParticleChange
G4ParticleChangeForGamma * fParticleChange
Definition: G4XrayRayleighModel.hh:70
G4VEmModel::G4VEmModel
G4VEmModel(const G4String &nam)
Definition: G4VEmModel.cc:68
G4VEmModel::SetHighEnergyLimit
void SetHighEnergyLimit(G4double)
Definition: G4VEmModel.hh:724
G4cout
G4GLOB_DLL std::ostream G4cout
eV
static constexpr double eV
Definition: G4SIunits.hh:215
G4endl
#define G4endl
Definition: G4ios.hh:61
MeV
static constexpr double MeV
Definition: G4SIunits.hh:214

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G4XrayRayleighModel::~G4XrayRayleighModel ( )
virtual

Definition at line 81 of file G4XrayRayleighModel.cc.

82 {
83 
84 }

Member Function Documentation

G4double G4XrayRayleighModel::ComputeCrossSectionPerAtom ( const G4ParticleDefinition *  ,
G4double  kinEnergy,
G4double  Z,
G4double  A = 0,
G4double  cut = 0,
G4double  emax = DBL_MAX 
)
virtual

Reimplemented from G4VEmModel.

Definition at line 107 of file G4XrayRayleighModel.cc.

112 {
113  if (verboseLevel > 3)
114  {
115  G4cout << "Calling CrossSectionPerAtom() of G4XrayRayleighModel" << G4endl;
116  }
117  if (gammaEnergy < lowEnergyLimit || gammaEnergy > highEnergyLimit)
118  {
119  return 0.0;
120  }
121  G4double k = gammaEnergy/hbarc;
122  k *= Bohr_radius;
123  G4double p0 = 0.680654;
124  G4double p1 = -0.0224188;
125  G4double lnZ = std::log(Z);
126 
127  G4double lna = p0 + p1*lnZ;
128 
129  G4double alpha = std::exp(lna);
130 
131  G4double fo = std::pow(k, alpha);
132 
133  p0 = 3.68455;
134  p1 = -0.464806;
135  lna = p0 + p1*lnZ;
136 
137  fo *= 0.01*std::exp(lna);
138 
139  fFormFactor = fo;
140 
141  G4double b = 1. + 2.*fo;
142  G4double b2 = b*b;
143  G4double b3 = b*b2;
144 
145  G4double xsc = fCofR*Z*Z/b3;
146  xsc *= fo*fo + (1. + fo)*(1. + fo);
147 
148 
149  return xsc;
150 
151 }
CLHEP::Bohr_radius
static constexpr double Bohr_radius
Definition: PhysicalConstants.h:99
CLHEP::hbarc
static constexpr double hbarc
Definition: PhysicalConstants.h:65
G4cout
G4GLOB_DLL std::ostream G4cout
G4endl
#define G4endl
Definition: G4ios.hh:61
G4double
double G4double
Definition: G4Types.hh:76
alpha
static const G4double alpha
Definition: G4LivermoreBremsstrahlungModel.cc:79
Z
G4int Z
Definition: G4ParticleHPJENDLHEData.cc:262
void G4XrayRayleighModel::Initialise ( const G4ParticleDefinition *  particle,
const G4DataVector &  cuts 
)
virtual

Implements G4VEmModel.

Definition at line 88 of file G4XrayRayleighModel.cc.

90 {
91  if (verboseLevel > 3)
92  {
93  G4cout << "Calling G4XrayRayleighModel::Initialise()" << G4endl;
94  }
95 
96  InitialiseElementSelectors(particle,cuts);
97 
98 
99  if(isInitialised) return;
100  fParticleChange = GetParticleChangeForGamma();
101  isInitialised = true;
102 
103 }
G4XrayRayleighModel::fParticleChange
G4ParticleChangeForGamma * fParticleChange
Definition: G4XrayRayleighModel.hh:70
G4VEmModel::InitialiseElementSelectors
void InitialiseElementSelectors(const G4ParticleDefinition *, const G4DataVector &)
Definition: G4VEmModel.cc:146
G4cout
G4GLOB_DLL std::ostream G4cout
G4endl
#define G4endl
Definition: G4ios.hh:61
G4VEmModel::GetParticleChangeForGamma
G4ParticleChangeForGamma * GetParticleChangeForGamma()
Definition: G4VEmModel.cc:132

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void G4XrayRayleighModel::SampleSecondaries ( std::vector< G4DynamicParticle * > *  ,
const G4MaterialCutsCouple *  couple,
const G4DynamicParticle *  aDynamicGamma,
G4double  tmin,
G4double  maxEnergy 
)
virtual

Implements G4VEmModel.

Definition at line 155 of file G4XrayRayleighModel.cc.

160 {
161  if ( verboseLevel > 3)
162  {
163  G4cout << "Calling SampleSecondaries() of G4XrayRayleighModel" << G4endl;
164  }
165  G4double photonEnergy0 = aDynamicGamma->GetKineticEnergy();
166 
167  G4ParticleMomentum photonDirection0 = aDynamicGamma->GetMomentumDirection();
168 
169 
170  // Sample the angle of the scattered photon
171  // according to 1 + cosTheta*cosTheta distribution
172 
173  G4double cosDipole, cosTheta, sinTheta;
174  G4double c, delta, cofA, signc = 1., a, power = 1./3.;
175 
176  c = 4. - 8.*G4UniformRand();
177  a = c;
178 
179  if( c < 0. )
180  {
181  signc = -1.;
182  a = -c;
183  }
184  delta = std::sqrt(a*a+4.);
185  delta += a;
186  delta *= 0.5;
187  cofA = -signc*std::pow(delta, power);
188  cosDipole = cofA - 1./cofA;
189 
190  // select atom
191  const G4Element* elm = SelectRandomAtom(couple, aDynamicGamma->GetParticleDefinition(), photonEnergy0);
192  G4double Z = elm->GetZ();
193 
194  G4double k = photonEnergy0/hbarc;
195  k *= Bohr_radius;
196  G4double p0 = 0.680654;
197  G4double p1 = -0.0224188;
198  G4double lnZ = std::log(Z);
199 
200  G4double lna = p0 + p1*lnZ;
201 
202  G4double alpha = std::exp(lna);
203 
204  G4double fo = std::pow(k, alpha);
205 
206  p0 = 3.68455;
207  p1 = -0.464806;
208  lna = p0 + p1*lnZ;
209 
210  fo *= 0.01*pi*std::exp(lna);
211 
212 
213  G4double beta = fo/(1 + fo);
214 
215  cosTheta = (cosDipole + beta)/(1. + cosDipole*beta);
216 
217 
218  if( cosTheta > 1.) cosTheta = 1.;
219  if( cosTheta < -1.) cosTheta = -1.;
220 
221  sinTheta = std::sqrt( (1. - cosTheta)*(1. + cosTheta) );
222 
223  // Scattered photon angles. ( Z - axis along the parent photon)
224 
225  G4double phi = twopi * G4UniformRand() ;
226  G4double dirX = sinTheta*std::cos(phi);
227  G4double dirY = sinTheta*std::sin(phi);
228  G4double dirZ = cosTheta;
229 
230  // Update G4VParticleChange for the scattered photon
231 
232  G4ThreeVector photonDirection1(dirX, dirY, dirZ);
233  photonDirection1.rotateUz(photonDirection0);
234  fParticleChange->ProposeMomentumDirection(photonDirection1);
235 
236  fParticleChange->SetProposedKineticEnergy(photonEnergy0);
237 }
G4XrayRayleighModel::fParticleChange
G4ParticleChangeForGamma * fParticleChange
Definition: G4XrayRayleighModel.hh:70
G4DynamicParticle::GetKineticEnergy
G4double GetKineticEnergy() const
CLHEP::Bohr_radius
static constexpr double Bohr_radius
Definition: PhysicalConstants.h:99
CLHEP::hbarc
static constexpr double hbarc
Definition: PhysicalConstants.h:65
G4Element::GetZ
G4double GetZ() const
Definition: G4Element.hh:131
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
G4cout
G4GLOB_DLL std::ostream G4cout
G4DynamicParticle::GetMomentumDirection
const G4ThreeVector & GetMomentumDirection() const
G4DynamicParticle::GetParticleDefinition
const G4ParticleDefinition * GetParticleDefinition() const
G4ParticleChangeForGamma::SetProposedKineticEnergy
void SetProposedKineticEnergy(G4double proposedKinEnergy)
Definition: G4ParticleChangeForGamma.hh:129
G4endl
#define G4endl
Definition: G4ios.hh:61
pi
static constexpr double pi
Definition: G4SIunits.hh:75
G4double
double G4double
Definition: G4Types.hh:76
alpha
static const G4double alpha
Definition: G4LivermoreBremsstrahlungModel.cc:79
G4VEmModel::SelectRandomAtom
const G4Element * SelectRandomAtom(const G4MaterialCutsCouple *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
Definition: G4VEmModel.hh:541
Z
G4int Z
Definition: G4ParticleHPJENDLHEData.cc:262

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Member Data Documentation

G4ParticleChangeForGamma* G4XrayRayleighModel::fParticleChange
protected

Definition at line 70 of file G4XrayRayleighModel.hh.

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