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This commit is contained in:
Gabriele Cosmo
2016-06-09 15:37:50 +02:00
parent a8e9364cea
commit 96c8bcd0af
6923 changed files with 198390 additions and 41849 deletions
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source/processes/electromagnetic/standard/include/G4eCoulombScatteringModel.hh
+97 -40
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@@ -23,8 +23,8 @@
// * acceptance of all terms of the Geant4 Software license. *
// ********************************************************************
//
// $Id: G4eCoulombScatteringModel.hh,v 1.6 2007/05/22 17:34:36 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-00 $
// $Id: G4eCoulombScatteringModel.hh,v 1.20 2007/10/24 10:42:05 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-01 $
//
// -------------------------------------------------------------------
//
@@ -43,6 +43,7 @@
// 08.08.06 V.Ivanchenko build internal table in ekin scale, introduce faclim
// 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-
//
// Class Description:
//
@@ -62,9 +63,11 @@
#include "G4VEmModel.hh"
#include "G4PhysicsTable.hh"
#include "G4NistManager.hh"
#include "globals.hh"
class G4ParticleChangeForGamma;
class G4ParticleDefinition;
class G4eCoulombScatteringModel : public G4VEmModel
{
@@ -72,7 +75,7 @@ class G4eCoulombScatteringModel : public G4VEmModel
public:
G4eCoulombScatteringModel(G4double thetaMin = 0.0, G4double thetaMax = pi,
G4bool build = true, G4double tlim = TeV*TeV,
G4bool build = false, G4double tlim = TeV*TeV,
const G4String& nam = "eCoulombScattering");
virtual ~G4eCoulombScatteringModel();
@@ -81,11 +84,11 @@ public:
virtual G4double ComputeCrossSectionPerAtom(
const G4ParticleDefinition*,
G4double kinEnergy,
G4double Z,
G4double A,
G4double cut,
G4double emax);
G4double kinEnergy,
G4double Z,
G4double A,
G4double cut,
G4double emax);
virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
const G4MaterialCutsCouple*,
@@ -95,28 +98,65 @@ public:
protected:
G4double ScreeningParameter(G4double Z, G4double q2,
G4double mom2, G4double invbeta2);
G4double ComputeElectronXSectionPerAtom(
const G4ParticleDefinition*,
G4double kinEnergy,
G4double Z,
G4double A,
G4double cut);
virtual G4double CalculateCrossSectionPerAtom(
const G4ParticleDefinition*,
G4double kinEnergy,
G4double Z, G4double A);
inline void SetupParticle(const G4ParticleDefinition*);
inline void SetupKinematic(G4double kinEnergy);
inline void SetupTarget(G4double Z, G4double A, G4double kinEnergy);
private:
G4double CalculateCrossSectionPerAtom(const G4ParticleDefinition*,
G4double kinEnergy,
G4double Z);
// hide assignment operator
G4eCoulombScatteringModel & operator=(const G4eCoulombScatteringModel &right);
G4eCoulombScatteringModel(const G4eCoulombScatteringModel&);
protected:
const G4ParticleDefinition* theProton;
const G4ParticleDefinition* theElectron;
const G4ParticleDefinition* thePositron;
G4ParticleChangeForGamma* fParticleChange;
G4NistManager* fNistManager;
G4double coeff;
G4double constn;
G4double cosThetaMin;
G4double cosThetaMax;
G4double cosTetMaxNuc;
G4double cosTetMaxElec;
G4double q2Limit;
G4double elecXSection;
G4double nucXSection;
G4double ecut;
// projectile
const G4ParticleDefinition* particle;
G4double chargeSquare;
G4double spin;
G4double mass;
G4double tkin;
G4double mom2;
G4double invbeta2;
// target
G4double targetZ;
G4double targetA;
G4double screenZ;
G4double formfactA;
private:
@@ -136,36 +176,53 @@ private:
G4bool isInitialised;
};
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
inline G4double G4eCoulombScatteringModel::ComputeCrossSectionPerAtom(
const G4ParticleDefinition* p,
G4double kinEnergy,
G4double Z, G4double,
G4double, G4double)
inline
void G4eCoulombScatteringModel::SetupParticle(const G4ParticleDefinition* p)
{
G4double x;
G4bool b;
if(theCrossSectionTable) {
x = std::exp((((*theCrossSectionTable)[index[G4int(Z)]]))
->GetValue(kinEnergy, b));
} else x = CalculateCrossSectionPerAtom(p, kinEnergy, Z);
// G4cout << "G4eCoulombScatteringModel: e= " << kinEnergy
// << " cs= " << x << G4endl;
return x;
}
inline G4double G4eCoulombScatteringModel::ScreeningParameter(
G4double Z,
G4double q2,
G4double mom2,
G4double invbeta2)
{
G4double a = invbeta2*Z*Z*q2*alpha2;
return std::pow(Z,0.6666667)*a0*(1.13 + 3.76*a)/mom2;
// Initialise mass and charge
if(p != particle) {
particle = p;
mass = particle->GetPDGMass();
spin = particle->GetPDGSpin();
G4double q = particle->GetPDGCharge()/eplus;
chargeSquare = q*q;
tkin = 0.0;
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
inline void G4eCoulombScatteringModel::SetupKinematic(G4double ekin)
{
if(ekin != tkin) {
tkin = ekin;
mom2 = tkin*(tkin + 2.0*mass);
invbeta2 = 1.0 + mass*mass/mom2;
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
inline void G4eCoulombScatteringModel::SetupTarget(G4double Z, G4double A,
G4double e)
{
if(e != tkin || Z != targetZ || A != targetA) {
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;
// A.V. Butkevich et al., NIM A 488 (2002) 282
x = fNistManager->GetLOGA(A);
formfactA = mom2*constn*std::exp(0.54*x);
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
#endif