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This commit is contained in:
Gabriele Cosmo
2016-06-09 14:55:03 +02:00
parent 216a75eeb1
commit fe73f43734
6714 changed files with 118229 additions and 68144 deletions
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source/processes/electromagnetic/standard/include/G4eCoulombScatteringModel.hh
+51 -18
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@@ -23,8 +23,8 @@
// * acceptance of all terms of the Geant4 Software license. *
// ********************************************************************
//
// $Id: G4eCoulombScatteringModel.hh,v 1.2 2006/06/29 19:52:06 gunter Exp $
// GEANT4 tag $Name: geant4-08-01 $
// $Id: G4eCoulombScatteringModel.hh,v 1.5 2006/10/19 09:44:27 vnivanch Exp $
// GEANT4 tag $Name: geant4-08-02 $
//
// -------------------------------------------------------------------
//
@@ -38,12 +38,20 @@
// Creation date: 19.02.2006
//
// Modifications:
// 01.08.06 V.Ivanchenko extend upper limit of table to TeV and review the
// logic of building - only elements from G4ElementTable
// 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
//
// Class Description:
//
// Implementation of eCoulombScattering of pointlike charge particle
// on Atomic Nucleus for interval of scattering anles in Lab system
// thetaMin - ThetaMax, nucleus recoil is neglected
// thetaMin - ThetaMax, nucleus recoil is neglected.
// The model based on analysis of J.M.Fernandez-Varea et al.
// NIM B73(1993)447 originated from G.Wentzel Z.Phys. 40(1927)590 with
// screening parameter from H.A.Bethe Phys. Rev. 89 (1953) 1256.
//
// -------------------------------------------------------------------
@@ -54,6 +62,7 @@
#include "G4VEmModel.hh"
#include "G4PhysicsTable.hh"
#include "globals.hh"
class G4ParticleChangeForGamma;
@@ -84,6 +93,11 @@ public:
G4double tmin,
G4double maxEnergy);
protected:
G4double ScreeningParameter(G4double Z, G4double q2,
G4double mom2, G4double invbeta2);
private:
G4double CalculateCrossSectionPerAtom(const G4ParticleDefinition*,
@@ -94,19 +108,29 @@ private:
G4eCoulombScatteringModel & operator=(const G4eCoulombScatteringModel &right);
G4eCoulombScatteringModel(const G4eCoulombScatteringModel&);
protected:
G4ParticleChangeForGamma* fParticleChange;
G4PhysicsTable* theCrossSectionTable;
G4double coeff;
G4double a0;
G4double cosThetaMin;
G4double cosThetaMax;
G4double lowMomentum;
G4double highMomentum;
G4double q2Limit;
private:
G4PhysicsTable* theCrossSectionTable;
G4double a0;
G4double lowKEnergy;
G4double highKEnergy;
G4double alpha2;
G4double faclim;
G4int nbins;
G4int nmax;
G4int index[100];
G4bool buildTable;
G4bool isInitialised;
@@ -115,24 +139,33 @@ private:
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
inline G4double G4eCoulombScatteringModel::ComputeCrossSectionPerAtom(
const G4ParticleDefinition* p,
G4double kinEnergy,
G4double Z, G4double,
G4double, G4double)
const G4ParticleDefinition* p,
G4double kinEnergy,
G4double Z, G4double,
G4double, G4double)
{
G4double x;
G4bool b;
if(theCrossSectionTable) {
G4bool b;
G4double mass = p->GetPDGMass();
G4double momentum2 = kinEnergy*(kinEnergy + 2.0*mass);
G4double e = kinEnergy + mass;
G4double beta2 = momentum2/(e*e);
x = (((*theCrossSectionTable)[G4int(Z)]))->GetValue(momentum2, b)
/ (momentum2*beta2);
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;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
#endif