//  Geant4 simulation for MuSR
//  AUTHOR: Toni SHIROKA, Paul Scherrer Institut, PSI
//  DATE  : 2008-05
//

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//  Muonium "Scattering"
//  Id    : lem4MuScatter.hh, v 1.4
//  Author: Taofiq PARAISO, T. Shiroka
//  Date  : 2007-12
//  Notes : Simplified model for Mu scattering. Spin effects have been excluded.
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/*!
 * lem4MuScatter class defines the Muonium scattering process. It implements a very 
 * basic model which assumes Muonium looses its electron as soon as it enters any 
 * material (except for vacuum and CFoil). The class has only a PostStepDoIt method.
 * The in-flight Muonium spin precession has been supressed. */

#ifndef lem4MuScatter_h
#define lem4MuScatter_h 1

#include "G4VDiscreteProcess.hh"

class lem4MuScatter : public G4VDiscreteProcess
{
 public:
   lem4MuScatter(const G4String& name="MuScatt", // process description
		G4ProcessType aType = fGeneral);
  
  ~lem4MuScatter();

  //! \mm The actions are taken at the end of the step.
  G4VParticleChange* PostStepDoIt(const G4Track&,
  				  const G4Step&);

  G4double GetMeanFreePath(const G4Track& aTrack,
			   G4double previousStepSize,
			   G4ForceCondition* condition);
  
  //! The condition for applying the process.
  G4bool CheckCondition(const G4Step& aStep);

  
  G4bool   condition;
  G4double itime, gtime, ftime,deltatime;
  G4String p_name;
  G4DynamicParticle *DP;
  G4ParticleChange  fParticleChange; 
 
  void  PrepareSecondary(const G4Track&);
  G4Track* aSecondary;

  void InitializeSecondaries(const G4Track&);
};

#endif