G4eSingleCoulombScatteringModel.hh

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//  G4eSingleCoulombScatteringModel.hh
// -------------------------------------------------------------------
//
// GEANT4 Class header file
//
// File name:    G4eSingleCoulombScatteringModel 
//
// Author:  Cristina Consolandi
//
// Creation date: 20.10.2011  
//              
// Class Description:
//      Single Scattering model for electron-nuclei interaction.
//      Suitable for high energy electrons and low scattering angles.
// 
// Reference:
//      M.J. Boschini et al.
//      "Non Ionizing Energy Loss induced by Electrons in the Space Environment"
//       Proc. of the 13th International Conference on Particle Physics and Advanced Technology 
//       (13th ICPPAT, Como 3-7/10/2011), World Scientific (Singapore).
//      Available at: http://arxiv.org/abs/1111.4042v4
//
//
// -------------------------------------------------------------------
//

#ifndef G4eSingleCoulombScatteringModel_h
#define G4eSingleCoulombScatteringModel_h 1

#include "G4VEmModel.hh"
#include "globals.hh"
#include "G4ScreeningMottCrossSection.hh"

#include <vector>
using namespace std;

class G4ParticleChangeForGamma;
class G4ParticleDefinition;
class G4IonTable;
class G4Nistmanager;

class G4eSingleCoulombScatteringModel : public G4VEmModel
{

public:

    G4eSingleCoulombScatteringModel(const G4String& nam = "eSingleCoulombScattering");
 
    virtual ~G4eSingleCoulombScatteringModel();

    virtual void Initialise(const G4ParticleDefinition*, const G4DataVector&);
 
    virtual G4double ComputeCrossSectionPerAtom(
                                const G4ParticleDefinition*,
                G4double kinEnergy, 
                G4double Z, 
                G4double A, 
                G4double cut,
                G4double emax);

    virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
                 const G4MaterialCutsCouple*,
                 const G4DynamicParticle*,
                 G4double tmin,
                 G4double maxEnergy);
    
    inline void SetRecoilThreshold(G4double eth);

protected: 
     
    inline void DefineMaterial(const G4MaterialCutsCouple*);
    inline void SetupParticle(const G4ParticleDefinition*);

private:

    // hide assignment operator
  G4eSingleCoulombScatteringModel & operator=(const G4eSingleCoulombScatteringModel &right);
  G4eSingleCoulombScatteringModel(const  G4eSingleCoulombScatteringModel&);

    G4IonTable*               theIonTable;
    G4ParticleChangeForGamma* fParticleChange; 
    G4NistManager*            fNistManager;
    G4ScreeningMottCrossSection* Mottcross;   

        const std::vector<G4double>* pCuts;
    const G4MaterialCutsCouple* currentCouple; 
    const G4Material*           currentMaterial;
    const G4Element*            currentElement;
        G4int                       currentMaterialIndex;


    G4double                  cosThetaMin;
    G4double                  recoilThreshold;
                

    // projectile
    const G4ParticleDefinition* particle;       
    G4double                  mass;     
    G4double                  lowEnergyLimit;


private:

    G4bool                    isInitialised;    

};

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

inline
void G4eSingleCoulombScatteringModel::DefineMaterial(const G4MaterialCutsCouple* cup)
{ 
    if(cup != currentCouple) {
            currentCouple = cup;
            currentMaterial = cup->GetMaterial();
                currentMaterialIndex = currentCouple->GetIndex();

        }
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

inline
void G4eSingleCoulombScatteringModel::SetupParticle(const G4ParticleDefinition* p)
{
    if(p != particle) {
            particle = p;
            mass = particle->GetPDGMass();
        Mottcross->SetupParticle(p);
        }
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

inline void G4eSingleCoulombScatteringModel::SetRecoilThreshold(G4double eth)
{
    recoilThreshold = eth;
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

#endif