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//
// $Id$
//
// Author: Maria Grazia Pia (Maria.Grazia.Pia@cern.ch)
//         V. Ivanchenko 
//         Values of the parameters from A. Forti's fit
//
// History:
// -----------
// 31 Jul 2001   MGP        Created
// 12.09.01 V.Ivanchenko    Add param and interpolation of parametersVI  
// 10.10.2001 MGP           Revision to improve code quality and 
//                          consistency with design
// 29.11.01  V.Ivanchenko    Parametrisation is updated
//
// -------------------------------------------------------------------

// Class description:
// Low Energy Electromagnetic Physics
// Set of parameters for LowEnergyIonisation described spectrum 
// of delta-electrons retrieved from EEDL database.
// Further documentation available from http://www.ge.infn.it/geant4/lowE

// -------------------------------------------------------------------

#ifndef G4IONISATIONPARAMETERS_HH
#define G4IONISATIONPARAMETERS_HH 1

#include "globals.hh"
#include "G4DataVector.hh"
#include <map>

class G4VDataSetAlgorithm;
class G4VEMDataSet;

class G4eIonisationParameters {
 
public:

  G4eIonisationParameters(G4int minZ = 1, G4int maxZ = 99);

  ~G4eIonisationParameters();
 
  G4double Parameter(G4int Z, G4int shellIndex, 
		     G4int parameterIndex, G4double e) const;

  G4double Excitation(G4int Z, G4double e) const;
  
  void PrintData() const;

private:

  // Hide copy constructor and assignment operator 
  G4eIonisationParameters(const G4eIonisationParameters&);
  G4eIonisationParameters & operator=(const G4eIonisationParameters &right);

  void LoadData();

  G4int zMin;
  G4int zMax;

  G4DataVector activeZ;

  // Parameters of the energy spectra
  std::map<G4int,G4VEMDataSet*,std::less<G4int> > param;
  std::map<G4int,G4VEMDataSet*,std::less<G4int> > excit;

  size_t length;
};
 
#endif