G4AtimaEnergyLossModel.hh

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//
// GEANT4 Class header file
//
// File name:     G4AtimaEnergyLossModel
//
// Author:        Jose Luis Rodriguez Sanchez on base of ATIMA code
//
// Creation date: 16.01.2018
//
// Modifications:
//
//
// Class Description:
//
// Implementation of ATIMA model of energy loss 
// by heavy charged particles
 
// -------------------------------------------------------------------
//
 
#ifndef G4AtimaEnergyLossModel_h
#define G4AtimaEnergyLossModel_h 1
 
#include <CLHEP/Units/SystemOfUnits.h>
 
#include "G4VEmModel.hh"
#include "G4NistManager.hh"
 
class G4EmCorrections;
class G4ParticleChangeForLoss;
 
class G4AtimaEnergyLossModel : public G4VEmModel
{
 
public:
 
  explicit G4AtimaEnergyLossModel(const G4ParticleDefinition* p = nullptr,
                                  const G4String& nam = "Atima");
 
  ~G4AtimaEnergyLossModel() override;
 
  void Initialise(const G4ParticleDefinition*, const G4DataVector&) override;
 
  G4double MinEnergyCut(const G4ParticleDefinition*,
            const G4MaterialCutsCouple* couple) override;
 
  G4double ComputeCrossSectionPerElectron(
                 const G4ParticleDefinition*,
                 G4double kineticEnergy,
                 G4double cutEnergy,
                 G4double maxEnergy);
                 
  G4double ComputeCrossSectionPerAtom(
                 const G4ParticleDefinition*,
                 G4double kineticEnergy,
                 G4double Z, G4double A,
                 G4double cutEnergy,
                 G4double maxEnergy) override;
                                 
  G4double CrossSectionPerVolume(const G4Material*,
                 const G4ParticleDefinition*,
                 G4double kineticEnergy,
                 G4double cutEnergy,
                 G4double maxEnergy) override;
                 
  G4double ComputeDEDXPerVolume(const G4Material*,
                const G4ParticleDefinition*,
                G4double kineticEnergy,
                G4double) override;
 
  G4double GetChargeSquareRatio(const G4ParticleDefinition* p,
                const G4Material* mat,
                G4double kineticEnergy) override;
 
  G4double GetParticleCharge(const G4ParticleDefinition* p,
                 const G4Material* mat,
                 G4double kineticEnergy) override;
 
  void CorrectionsAlongStep(const G4MaterialCutsCouple*,
                const G4DynamicParticle*,
                const G4double&,
                G4double&) override;
 
  void SampleSecondaries(std::vector<G4DynamicParticle*>*,
             const G4MaterialCutsCouple*,
             const G4DynamicParticle*,
             G4double tmin,
             G4double maxEnergy) override;
 
protected:
 
  G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
                  G4double kinEnergy) override;
 
  inline G4double GetChargeSquareRatio() const;
 
  inline void SetChargeSquareRatio(G4double val);
 
private:
 
  void SetupParameters();
 
  inline void SetParticle(const G4ParticleDefinition* p);
 
  inline void SetGenericIon(const G4ParticleDefinition* p);
 
  G4double StoppingPower(G4double ap, G4double zp, G4double ep, G4double at, G4double zt);
  G4double Bethek_dedx_e(G4double ap,G4double zp,G4double ep,G4double at,G4double zt);
  G4double dedx_n(const G4double ap, const G4double zp, const G4double ep, const G4double at, const G4double zt);
  G4double sezi_dedx_e(const G4double zp, const G4double ep, const G4double at, const G4double zt);
  G4double sezi_p_se(const G4double energy, const G4double at, const G4double zt);
  G4double EnergyTable_interpolate(G4double xval, const G4double* y);
 
  // hide assignment operator
  G4AtimaEnergyLossModel & operator=(const  G4AtimaEnergyLossModel &right) = delete;
  G4AtimaEnergyLossModel(const  G4AtimaEnergyLossModel&) = delete;
 
  const G4ParticleDefinition* particle;
  const G4ParticleDefinition* theElectron;
  G4EmCorrections*            corr;
  G4ParticleChangeForLoss*    fParticleChange;
  G4NistManager*              nist;
  G4Pow* g4calc;
 
  G4double mass = 0.0;
  G4double tlimit = DBL_MAX;
  G4double spin = 0.0;
  G4double magMoment2 = 0.0;
  G4double chargeSquare = 1.0;
  G4double ratio = 1.0;
  G4double formfact = 0.0;
  G4double corrFactor = 1.0;
  G4double MLN10;
  G4double atomic_mass_unit;
  G4double dedx_constant;
  G4double electron_mass;
  G4double fine_structure;
  G4double domega2dx_constant;
 
  G4bool   isIon = false;
 
  static G4double stepE;
  static G4double tableE[200];
  static const G4double element_atomic_weights[110];
  static const G4double ls_coefficients_a[110][200];
  static const G4double ls_coefficients_ahi[110][200];
  static const G4double proton_stopping_coef[92][8];
  static const G4double ionisation_potentials_z[121];
 
  static const G4double atima_vfermi[92];
  static const G4double atima_lambda_screening[92];
  static const G4double x0[92];
  static const G4double x1[92];
  static const G4double afermi[92];
  static const G4double c[92];
  static const G4double m0[92];
  static const G4double del_0[92];
 
};
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 
inline void G4AtimaEnergyLossModel::SetParticle(const G4ParticleDefinition* p)
{
  if(particle != p) {
    particle = p;
    if(p->GetBaryonNumber() > 3 || p->GetPDGCharge() > CLHEP::eplus) 
      { isIon = true; } 
    SetupParameters();
  }
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 
inline void G4AtimaEnergyLossModel::SetGenericIon(const G4ParticleDefinition* p)
{
  if(p && p->GetParticleName() == "GenericIon") { isIon = true; }
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 
inline G4double G4AtimaEnergyLossModel::GetChargeSquareRatio() const
{
  return chargeSquare;
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 
inline void G4AtimaEnergyLossModel::SetChargeSquareRatio(G4double val)
{
  chargeSquare = val;
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 
#endif