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// $Id: G4PhotoElectricEffect.hh,v 1.18 2005/05/04 16:16:12 vnivanch Exp $
// GEANT4 tag $Name: geant4-07-01 $
//
//
//------------------ G4PhotoElectricEffect physics process ------------------
//                   by Michel Maire, 24 May 1996
//
// 12-06-96, Added SelectRandomAtom() method and new data member
//           for cumulative total cross section, by M.Maire
// 21-06-96, SetCuts implementation, M.Maire
// 17-09-96, Dynamic array PartialSumSigma
//           split ComputeBindingEnergy(), M.Maire
// 08-01-97, crossection table + meanfreepath table, M.Maire
// 13-03-97, adapted for the new physics scheme, M.Maire
// 13-08-98, new methods SetBining() PrintInfo()
// 17-11-98, use table of atomic shells in PostStepDoIt, mma
// 06-01-99, Sandia crossSection below 50 keV, V.Grichine mma
// 03-08-01, new methods Store/Retrieve PhysicsTable (mma)
// 06-08-01, BuildThePhysicsTable() called from constructor (mma)
// 19-09-01, come back to previous process name "phot"
// 20-09-01, DoIt: fminimalEnergy = 1*eV (mma)
// 01-10-01, come back to BuildPhysicsTable(const G4ParticleDefinition&)
// 10-01-02, moved few function from icc to cc
// 17-04-02, Keep only Sandia crossSections. Remove BuildPhysicsTables.
//           Simplify public interface (mma)
// 29-04-02, Generate theta angle of the photoelectron from Sauter-Gavrila
//           distribution (mma)
// 13-08-04, suppress icc file; make public ComputeCrossSectionPerAtom() (mma)
// 21-04-05, Redesign - use G4VEmProcess interface (V.Ivanchenko)
// 02-05-05, move ParticleChange actions in model (mma)
// 04-05-05, Make class to be default (V.Ivanchenko)
// -----------------------------------------------------------------------------

// class description
//

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#ifndef G4PhotoElectricEffect_h
#define G4PhotoElectricEffect_h 1

#include "globals.hh"
#include "G4VEmProcess.hh"
#include "G4Gamma.hh"

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class G4ParticleDefinition;
class G4VEmModel;
class G4MaterialCutsCouple;
class G4DynamicParticle;

class G4PhotoElectricEffect : public G4VEmProcess

{
public:  // with description

  G4PhotoElectricEffect(const G4String& processName ="phot",
		          G4ProcessType type = fElectromagnetic);

  virtual ~G4PhotoElectricEffect();

  // true for Gamma only.
  G4bool IsApplicable(const G4ParticleDefinition&);

  // Print few lines of informations about the process: validity range,
  void PrintInfo();

protected:

  void InitialiseProcess(const G4ParticleDefinition*);

  std::vector<G4DynamicParticle*>* SecondariesPostStep(
                                   G4VEmModel*,
                             const G4MaterialCutsCouple*,
                             const G4DynamicParticle*);

private:

  G4bool          isInitialised;
};

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inline G4bool G4PhotoElectricEffect::IsApplicable(const G4ParticleDefinition& p)
{
  return (&p == G4Gamma::Gamma());
}

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inline std::vector<G4DynamicParticle*>* G4PhotoElectricEffect::SecondariesPostStep(
                                   G4VEmModel* model,
                             const G4MaterialCutsCouple* couple,
                             const G4DynamicParticle* dp)
{
  return model->SampleSecondaries(couple, dp);
}

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#endif