G4DNAScreenedRutherfordElasticModel.hh

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// $Id$
//
 
#ifndef G4DNAScreenedRutherfordElasticModel_h
#define G4DNAScreenedRutherfordElasticModel_h 1
 
#include <CLHEP/Units/SystemOfUnits.h>
 
#include "G4VEmModel.hh"
#include "G4ParticleChangeForGamma.hh"
#include "G4ProductionCutsTable.hh"
#include "G4NistManager.hh"
 
class G4DNAScreenedRutherfordElasticModel : public G4VEmModel
{
 
public:
 
  G4DNAScreenedRutherfordElasticModel(const G4ParticleDefinition* p = 0, 
                  const G4String& nam = "DNAScreenedRutherfordElasticModel");
 
  virtual ~G4DNAScreenedRutherfordElasticModel();
 
  virtual void Initialise(const G4ParticleDefinition*, const G4DataVector&);
 
  virtual G4double CrossSectionPerVolume(const G4Material* material,
                       const G4ParticleDefinition* p,
                       G4double ekin,
                       G4double emin,
                       G4double emax);
 
  virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
                 const G4MaterialCutsCouple*,
                 const G4DynamicParticle*,
                 G4double tmin,
                 G4double maxEnergy);
 
  inline void SetKillBelowThreshold (G4double threshold);        
  G4double GetKillBelowThreshold () { return killBelowEnergy; }      
 
protected:
 
  G4ParticleChangeForGamma* fParticleChangeForGamma;
 
private:
  // Water density table
  const std::vector<G4double>* fpWaterDensity;
 
  G4double killBelowEnergy;  
  G4double lowEnergyLimit;  
  G4double intermediateEnergyLimit;
  G4double highEnergyLimit; 
  G4bool isInitialised;
  G4int verboseLevel;
  
  // Cross section
  
  G4double RutherfordCrossSection(G4double energy, G4double z);
  
  G4double ScreeningFactor(G4double energy, G4double z);
  
  // Final state according to Brenner & Zaider
 
  G4double BrennerZaiderRandomizeCosTheta(G4double k);
  G4double CalculatePolynomial(G4double k, std::vector<G4double>& vec);
  std::vector<G4double> betaCoeff;
  std::vector<G4double> deltaCoeff;
  std::vector<G4double> gamma035_10Coeff;
  std::vector<G4double> gamma10_100Coeff;
  std::vector<G4double> gamma100_200Coeff;
   
  // Final state according to Screened Rutherford
 
  G4double ScreenedRutherfordRandomizeCosTheta(G4double k, G4double z);
 
  //
   
  G4DNAScreenedRutherfordElasticModel & operator=(const  G4DNAScreenedRutherfordElasticModel &right);
  G4DNAScreenedRutherfordElasticModel(const  G4DNAScreenedRutherfordElasticModel&);
 
};
 
inline void G4DNAScreenedRutherfordElasticModel::SetKillBelowThreshold (G4double threshold) 
{ 
    killBelowEnergy = threshold; 
    if (threshold < 9*CLHEP::eV)
     G4Exception ("*** WARNING : the G4DNAScreenedRutherfordElasticModel class is not validated below 9 eV !","",JustWarning,"") ;   
}        
 
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#endif