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////////////////////////////////////////////////////////////////////////
// Ultra Cold Neutron (UCN) Multiple Scattering Class Definition
////////////////////////////////////////////////////////////////////////
//
// File:         G4UCNMultiScattering.hh
// Description:  Discrete Process -- MultiScattering of UCNs
// Version:      1.0
// Created:      2014-05-05
// Author:       Peter Gumplinger
// Adopted from: UCNMultiScattering by Peter Fierlinger 7.9.2004
// Updated:
// mail:         gum@triumf.ca
//
////////////////////////////////////////////////////////////////////////

#ifndef G4UCNMULTISCATTERING_HH
#define G4UCNMULTISCATTERING_HH 1

/////////////
// Includes
/////////////

#include "G4VDiscreteProcess.hh"

#include "G4Neutron.hh"

// Class Description:
// Discrete Process -- Multiple Scattering of Ultra Cold Neutrons.
// Multiple scatters UCN due to multi-scattering cross section of the material.
// Class inherits publicly from G4VDiscreteProcess.
// Class Description - End:

/////////////////////
// Class Definition
/////////////////////

class G4UCNMultiScattering : public G4VDiscreteProcess
{

public:

        ////////////////////////////////
        // Constructors and Destructor
        ////////////////////////////////

        G4UCNMultiScattering(const G4String& processName = "UCNMultiScattering",
                                      G4ProcessType type = fUCN);
	virtual ~G4UCNMultiScattering();

private:

        G4UCNMultiScattering(const G4UCNMultiScattering &right);

        //////////////
        // Operators
        //////////////

        G4UCNMultiScattering& operator=(const G4UCNMultiScattering &right);

public:

        ////////////
        // Methods
        ////////////

        G4bool IsApplicable(const G4ParticleDefinition& aParticleType);
        // Returns true -> 'is applicable' only for an UCN.

	G4double GetMeanFreePath(const G4Track& aTrack,
                                 G4double ,
                                 G4ForceCondition* condition);

	G4VParticleChange* PostStepDoIt(const G4Track& aTrack,
                                        const G4Step&  aStep);

        G4ThreeVector Scatter();

private:

};

////////////////////
// Inline methods
////////////////////

inline G4bool
G4UCNMultiScattering::IsApplicable(const G4ParticleDefinition& aParticleType)
{
   return ( &aParticleType == G4Neutron::NeutronDefinition() );
}

#endif /* G4UCNMULTISCATTERING_HH */
