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// -------------------------------------------------------------------
//
// GEANT4 Class file
//
//
// File name:  G4hShellCrossSectionDoubleExp   
//
// Author:     Simona Saliceti (simona.saliceti@ge.infn.it)
// 
// History:
// -----------
// 31/05/2004 Simona Saliceti 1st implementation
// -------------------------------------------------------------------
// Class Description: 
// Empiric Model for K shell cross sections in proton ionisation
// 2nd iteration, refined model at low energy
// Based on Fitted empirical Reference Cross Sections for K-Shell Ionization 
// by Protons by H.Paul and J.Sacher, At. Data Nucl. Data Tables 42 (1989) 105
// 
// -------------------------------------------------------------------
// $Id: G4hShellCrossSectionDoubleExp.hh,v 1.3 2006/06/29 19:38:12 gunter Exp $
// GEANT4 tag $Name: geant4-09-04-beta-cand-01 $

#ifndef G4HSHELLCROSSSECTIONDOUBLEEXP_HH
#define G4HSHELLCROSSSECTIONDOUBLEEXP_HH 1

#include "globals.hh"
#include "G4VhShellCrossSection.hh" 
#include "G4hShellCrossSectionDoubleExpData.hh"

class G4hShellCrossSectionDoubleExp : public G4VhShellCrossSection
{
public:

  G4hShellCrossSectionDoubleExp();

  virtual ~G4hShellCrossSectionDoubleExp();

  virtual std::vector<G4double> GetCrossSection(G4int Z,
						G4double incidentEnergy,
						G4double mass,
						G4double deltaEnergy,
						G4bool testFlag = false) const;
 
  void SetTotalCS(G4double);
 
protected:

  virtual std::vector<G4double> Probabilities(G4int Z,
					      G4double incidentEnergy,
					      G4double mass,
					      G4double deltaEnergy) const;


private:

  G4double GetCrossSectionDoubleExp(G4int Z,
			            G4double incidentEnergy) const;

  // Hide copy constructor and assignment operator 
  G4hShellCrossSectionDoubleExp(const G4hShellCrossSectionDoubleExp&);
  G4hShellCrossSectionDoubleExp & operator = (const G4hShellCrossSectionDoubleExp &right);
  G4hShellCrossSectionDoubleExpData* kShellData;

  G4double atomTotalCrossSection;
};

#endif