G4DNASecondOrderReaction.hh

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// $Id: G4DNASecondOrderReaction.hh 100802 2016-11-02 14:55:27Z gcosmo $
//
// Author: Mathieu Karamitros

// The code is developed in the framework of the ESA AO7146
//
// We would be very happy hearing from you, send us your feedback! :)
//
// In order for Geant4-DNA to be maintained and still open-source,
// article citations are crucial. 
// If you use Geant4-DNA chemistry and you publish papers about your software, 
// in addition to the general paper on Geant4-DNA:
//
// Int. J. Model. Simul. Sci. Comput. 1 (2010) 157–178
//
// we would be very happy if you could please also cite the following
// reference papers on chemistry:
//
// J. Comput. Phys. 274 (2014) 841-882
// Prog. Nucl. Sci. Tec. 2 (2011) 503-508 


#ifndef G4DNASECONDORDERREACTION_HH
#define G4DNASECONDORDERREACTION_HH

#include "G4VITProcess.hh"

class G4MolecularConfiguration;

class G4DNASecondOrderReaction : public G4VITProcess
{
public:
    G4DNASecondOrderReaction(const G4String& aName =  "DNASecondOrderReaction",
                             G4ProcessType type = fDecay);
    virtual ~G4DNASecondOrderReaction();

    G4IT_ADD_CLONE(G4VITProcess,G4DNASecondOrderReaction)

    G4DNASecondOrderReaction(const G4DNASecondOrderReaction&);
    G4DNASecondOrderReaction& operator=(const G4DNASecondOrderReaction&);
    void StartTracking(G4Track*);

    void SetReaction(const G4MolecularConfiguration*, const G4Material*, double /*reactionRate*/);

public :
   virtual void BuildPhysicsTable(const G4ParticleDefinition&);
   virtual G4double PostStepGetPhysicalInteractionLength(
                           const G4Track& track,
               G4double   previousStepSize,
               G4ForceCondition* condition
              );

   virtual G4VParticleChange* PostStepDoIt(
               const G4Track& ,
               const G4Step&
              );

   virtual G4double AtRestGetPhysicalInteractionLength(
                           const G4Track& ,
               G4ForceCondition*
              ){ return -1.0; }

   virtual G4VParticleChange* AtRestDoIt(
               const G4Track& ,
               const G4Step&
              ){return 0;}

   //  no operation in  AlongStepDoIt
   virtual G4double AlongStepGetPhysicalInteractionLength(
                           const G4Track&,
               G4double  ,
               G4double  ,
               G4double& ,
                           G4GPILSelection*
                          ){ return -1.0; }

   //  no operation in  AlongStepDoIt
   virtual G4VParticleChange* AlongStepDoIt(
               const G4Track& ,
               const G4Step&
                          ) {return 0;}

protected:
    struct SecondOrderReactionState : public G4ProcessState
    {
        SecondOrderReactionState();
        virtual ~SecondOrderReactionState(){;}
        G4double fPreviousTimeAtPreStepPoint;
        G4bool fIsInGoodMaterial;
    };

private :
    void Create();

protected:
    G4bool fIsInitialized;

    G4double fReturnedValue;

    const std::vector<double>* fpMoleculeDensity;
    G4double fReactionRate;
    G4double fConcentration;
    G4double fMolarMassOfMaterial;
    G4ParticleChange fParticleChange;

    const G4MolecularConfiguration* fpMolecularConfiguration;
    const G4Material* fpMaterial;
};

#endif // G4DNASECONDORDERREACTION_HH