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This commit is contained in:
Gabriele Cosmo
2016-06-09 15:58:43 +02:00
parent 96c8bcd0af
commit b79225fb37
7544 changed files with 245407 additions and 91099 deletions
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source/processes/electromagnetic/standard/include/G4eCoulombScatteringModel.hh
+90 -45
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@@ -23,8 +23,8 @@
// * acceptance of all terms of the Geant4 Software license. *
// ********************************************************************
//
// $Id: G4eCoulombScatteringModel.hh,v 1.20 2007/10/24 10:42:05 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-01 $
// $Id: G4eCoulombScatteringModel.hh,v 1.36 2008/08/04 08:49:09 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-02 $
//
// -------------------------------------------------------------------
//
@@ -44,6 +44,7 @@
// 19.08.06 V.Ivanchenko add inline function ScreeningParameter and
// make some members protected
// 09.10.07 V.Ivanchenko reorganized methods, add cut dependence in scattering off e-
// 09.06.08 V.Ivanchenko add SelectIsotope and sampling of the recoil ion
//
// Class Description:
//
@@ -74,9 +75,7 @@ class G4eCoulombScatteringModel : public G4VEmModel
public:
G4eCoulombScatteringModel(G4double thetaMin = 0.0, G4double thetaMax = pi,
G4bool build = false, G4double tlim = TeV*TeV,
const G4String& nam = "eCoulombScattering");
G4eCoulombScatteringModel(const G4String& nam = "eCoulombScattering");
virtual ~G4eCoulombScatteringModel();
@@ -96,48 +95,57 @@ public:
G4double tmin,
G4double maxEnergy);
inline void SetRecoilThreshold(G4double eth);
protected:
G4double ComputeElectronXSectionPerAtom(
const G4ParticleDefinition*,
G4double kinEnergy,
G4double Z,
G4double A,
G4double cut);
G4double CrossSectionPerAtom();
virtual G4double CalculateCrossSectionPerAtom(
const G4ParticleDefinition*,
G4double kinEnergy,
G4double Z, G4double A);
G4double SampleCosineTheta();
inline void DefineMaterial(const G4MaterialCutsCouple*);
inline void SetupParticle(const G4ParticleDefinition*);
inline void SetupKinematic(G4double kinEnergy);
inline void SetupKinematic(G4double kinEnergy, G4double cut);
inline void SetupTarget(G4double Z, G4double A, G4double kinEnergy);
inline void SetupTarget(G4double Z, G4double kinEnergy);
private:
void ComputeMaxElectronScattering(G4double cut);
// hide assignment operator
G4eCoulombScatteringModel & operator=(const G4eCoulombScatteringModel &right);
G4eCoulombScatteringModel(const G4eCoulombScatteringModel&);
protected:
const G4ParticleDefinition* theProton;
const G4ParticleDefinition* theElectron;
const G4ParticleDefinition* thePositron;
G4ParticleTable* theParticleTable;
G4ParticleChangeForGamma* fParticleChange;
G4NistManager* fNistManager;
const G4DataVector* currentCuts;
const G4MaterialCutsCouple* currentCouple;
const G4Material* currentMaterial;
const G4Element* currentElement;
G4int currentMaterialIndex;
G4double coeff;
G4double constn;
G4double cosThetaMin;
G4double cosThetaMax;
G4double cosTetMinNuc;
G4double cosTetMaxNuc;
G4double cosTetMaxNuc2;
G4double cosTetMaxElec;
G4double cosTetMaxElec2;
G4double q2Limit;
G4double recoilThreshold;
G4double elecXSection;
G4double nucXSection;
G4double ecut;
@@ -151,33 +159,39 @@ protected:
G4double tkin;
G4double mom2;
G4double invbeta2;
G4double etag;
G4double lowEnergyLimit;
// target
G4double targetZ;
G4double targetA;
G4double screenZ;
G4double formfactA;
G4int idxelm;
private:
G4PhysicsTable* theCrossSectionTable;
G4double a0;
G4double lowKEnergy;
G4double highKEnergy;
G4double alpha2;
G4double faclim;
G4double FF[100];
G4int nbins;
G4int nmax;
G4int index[100];
G4bool buildTable;
G4bool isInitialised;
};
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
inline
void G4eCoulombScatteringModel::DefineMaterial(const G4MaterialCutsCouple* cup)
{
if(cup != currentCouple) {
currentCouple = cup;
currentMaterial = cup->GetMaterial();
currentMaterialIndex = currentCouple->GetIndex();
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
inline
void G4eCoulombScatteringModel::SetupParticle(const G4ParticleDefinition* p)
{
@@ -189,40 +203,71 @@ void G4eCoulombScatteringModel::SetupParticle(const G4ParticleDefinition* p)
G4double q = particle->GetPDGCharge()/eplus;
chargeSquare = q*q;
tkin = 0.0;
lowEnergyLimit = keV*mass/electron_mass_c2;
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
inline void G4eCoulombScatteringModel::SetupKinematic(G4double ekin)
inline void G4eCoulombScatteringModel::SetupKinematic(G4double ekin,
G4double cut)
{
if(ekin != tkin) {
tkin = ekin;
mom2 = tkin*(tkin + 2.0*mass);
if(ekin != tkin || ecut != cut) {
tkin = ekin;
mom2 = tkin*(tkin + 2.0*mass);
invbeta2 = 1.0 + mass*mass/mom2;
}
cosTetMinNuc = cosThetaMin;
cosTetMaxNuc = cosThetaMax;
if(ekin <= 10.*cut && mass < MeV && cosThetaMin < 1.0) {
cosTetMinNuc = ekin*(cosThetaMin + 1.0)/(10.*cut) - 1.0;
}
ComputeMaxElectronScattering(cut);
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
inline void G4eCoulombScatteringModel::SetupTarget(G4double Z, G4double A,
G4double e)
inline void G4eCoulombScatteringModel::SetupTarget(G4double Z, G4double e)
{
if(e != tkin || Z != targetZ || A != targetA) {
if(Z != targetZ || e != etag) {
etag = e;
targetZ = Z;
targetA = A;
SetupKinematic(e);
cosTetMaxNuc = std::max(cosThetaMax, 1.0 - 0.5*q2Limit/mom2);
G4double x = fNistManager->GetZ13(Z);
screenZ = a0*x*x*(1.13 + 3.76*invbeta2*Z*Z*chargeSquare*alpha2)/mom2;
if(particle == theProton && A < 1.5 && cosTetMaxNuc < 0.0)
cosTetMaxNuc = 0.0;
G4int iz= G4int(Z);
if(iz > 99) iz = 99;
G4double x = fNistManager->GetZ13(iz);
screenZ = a0*x*x/mom2;
if(iz > 1) screenZ *=(1.13 + 3.76*invbeta2*Z*Z*chargeSquare*alpha2);
//screenZ = a0*x*x*(1.13 + 3.76*Z*Z*chargeSquare*alpha2)/mom2;
// A.V. Butkevich et al., NIM A 488 (2002) 282
x = fNistManager->GetLOGA(A);
formfactA = mom2*constn*std::exp(0.54*x);
formfactA = FF[iz];
if(formfactA == 0.0) {
x = fNistManager->GetA27(iz);
formfactA = constn*x*x;
FF[iz] = formfactA;
}
formfactA *= mom2;
cosTetMaxNuc2 = cosTetMaxNuc;
if(particle == theProton && 1 == iz && cosTetMaxNuc2 < 0.0) {
cosTetMaxNuc2 = 0.0;
}
/*
G4double ee = 10.*eV*Z;
if(1 == iz) ee *= 2.0;
G4double z = std::min(cosTetMaxElec, 1.0 - std::max(ecut,ee)*amu_c2
*fNistManager->GetAtomicMassAmu(iz)/mom2);
cosTetMaxElec2 = std::max(cosTetMaxNuc2, z);
*/
cosTetMaxElec2 = cosTetMaxElec;
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
inline void G4eCoulombScatteringModel::SetRecoilThreshold(G4double eth)
{
recoilThreshold = eth;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
#endif