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// $Id: G4FinalStateElasticBrennerZaider.hh,v 1.2 2008/07/14 20:47:34 sincerti Exp $
// GEANT4 tag $Name: geant4-09-02 $

#ifndef G4FINALSTATEELASTICBRENNERZAIDER_HH
#define G4FINALSTATEELASTICBRENNERZAIDER_HH 1
 
#include "G4FinalStateProduct.hh"
#include "Randomize.hh"

class G4Track;
class G4Step;

 class G4FinalStateElasticBrennerZaider
 {
 public:
   
   G4FinalStateElasticBrennerZaider();
   
   ~G4FinalStateElasticBrennerZaider();
   
   const G4FinalStateProduct& GenerateFinalState(const G4Track& track, const G4Step& step);
   
 private:
   
   G4double lowEnergyLimit;
   G4double highEnergyLimit;
   G4FinalStateProduct product;

   std::vector<G4double> betaCoeff;
   std::vector<G4double> deltaCoeff;
   std::vector<G4double> gamma035_10Coeff;
   std::vector<G4double> gamma10_100Coeff;
   std::vector<G4double> gamma100_200Coeff;

   G4double RandomizeCosTheta(G4double k);

   G4double CalculatePolynomial(G4double k, std::vector<G4double>& vec);
 };

#endif
