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// -------------------------------------------------------------------
//
//
// GEANT4 Class header file
//
//
// File name:     G4ICRU49NuclearStoppingModel
//
// Author:        V.Ivanchenko 
//
// Creation date: 20.07.2009 
//
// Modifications:
//
//
// Class Description:
//
// Implementation of the ICRU'49 model of nuclear stopping 

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

#ifndef G4ICRU49NuclearStoppingModel_h
#define G4ICRU49NuclearStoppingModel_h 1

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#include "G4VEmModel.hh"
#include "G4Threading.hh"

class G4ParticleChangeForLoss;
class G4Pow;

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class G4ICRU49NuclearStoppingModel : public G4VEmModel
{

public:

  explicit G4ICRU49NuclearStoppingModel(const G4String& nam = 
					"ICRU49NucStopping");

  virtual ~G4ICRU49NuclearStoppingModel();

  virtual void Initialise(const G4ParticleDefinition*, 
			  const G4DataVector&) final;

  // main method to compute dEdx
  virtual G4double ComputeDEDXPerVolume(const G4Material*,
                                        const G4ParticleDefinition*,
                                        G4double kineticEnergy,
                                        G4double cutEnergy = DBL_MAX) final;

  virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
				 const G4MaterialCutsCouple*,
				 const G4DynamicParticle*, 
				 G4double, G4double) final;

private:

  void InitialiseArray();

  G4double NuclearStoppingPower(G4double kineticEnergy,
				G4double Z1, G4double Z2,
				G4double A1, G4double A2);

  //  hide assignment operator
  G4ICRU49NuclearStoppingModel & operator=
  (const  G4ICRU49NuclearStoppingModel &right) = delete;
  G4ICRU49NuclearStoppingModel(const  G4ICRU49NuclearStoppingModel&) = delete;

  G4Pow* g4calc;
  G4double theZieglerFactor;
  static G4double Z23[100];

#ifdef G4MULTITHREADED
  static G4Mutex ICRU49NuclearMutex;
#endif
};

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#endif

