G4PhotonEvaporation.hh

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// -------------------------------------------------------------------
//
//      GEANT4 class file
//
//      CERN, Geneva, Switzerland
//
//      File name:     G4PhotonEvaporation
//
//      Author:        Vladimir Ivantchenko
//
//      Creation date: 22 October 2015 
//
// -------------------------------------------------------------------
//
// This is gamma deexcitation model based on the nuclear levels data
//
 
#ifndef G4PHOTONEVAPORATION_HH
#define G4PHOTONEVAPORATION_HH 1
 
#include "globals.hh"
#include "G4VEvaporationChannel.hh"
#include "G4NuclearLevelData.hh"
#include "G4LevelManager.hh"
#include "G4Fragment.hh"
 
const G4int MAXDEPOINT = 10;
const G4int MAXGRDATA = 300;
 
class G4GammaTransition;
 
class G4PhotonEvaporation : public G4VEvaporationChannel {
 
public:
 
  explicit G4PhotonEvaporation(G4GammaTransition* ptr=nullptr);
 
  ~G4PhotonEvaporation() override;
 
  void Initialise() override;
 
  // one photon or e- emission
  G4Fragment* EmittedFragment(G4Fragment* theNucleus) override;
 
  // returns "false", emitted gamma and e- are added to the results
  G4bool 
  BreakUpChain(G4FragmentVector* theResult, G4Fragment* theNucleus) override;
 
  // emitted gamma, e-, and residual fragment are added to the results
  G4FragmentVector* BreakItUp(const G4Fragment& theNucleus);
 
  // compute emission probability for both continum and discrete cases
  // must be called before any method above
  G4double GetEmissionProbability(G4Fragment* theNucleus) override;
 
  // methods for unit tests
  G4double ComputeInverseXSection(G4Fragment* theNucleus, 
                                  G4double kinEnergy) override;
  G4double ComputeProbability(G4Fragment* theNucleus, 
                  G4double kinEnergy) override;
 
  G4double GetFinalLevelEnergy(G4int Z, G4int A, G4double energy);
 
  G4double GetUpperLevelEnergy(G4int Z, G4int A);
 
  void SetGammaTransition(G4GammaTransition*);
 
  void SetICM(G4bool) override;
 
  void RDMForced (G4bool) override;
  
  inline void SetVerboseLevel(G4int verbose);
 
  inline G4int GetVacantShellNumber() const;
 
  G4PhotonEvaporation(const G4PhotonEvaporation & right) = delete;
  const G4PhotonEvaporation & operator = 
    (const G4PhotonEvaporation & right) = delete;
 
private:
 
  void InitialiseGRData();
 
  G4Fragment* GenerateGamma(G4Fragment* nucleus);
 
  inline void InitialiseLevelManager(G4int Z, G4int A);
 
  G4NuclearLevelData*   fNuclearLevelData;
  const G4LevelManager* fLevelManager;
  G4GammaTransition*    fTransition;
 
  // fPolarization stores polarization tensor for consecutive
  // decays of a nucleus 
  G4NuclearPolarization* fPolarization;
 
  G4int    fVerbose;
  G4int    theZ;
  G4int    theA;
  G4int    fPoints;
  G4int    fCode;
  G4int    vShellNumber;
  size_t   fIndex;
 
  G4int fSecID;  // Creator model ID for the secondaries created by this model
 
  static G4float GREnergy[MAXGRDATA];
  static G4float GRWidth[MAXGRDATA];
 
  G4double fCummProbability[MAXDEPOINT]; 
 
  G4double fLevelEnergyMax;
  G4double fExcEnergy;
  G4double fProbability;
  G4double fStep;
  G4double fMaxLifeTime;
 
  G4double fTolerance;
 
  G4bool   fICM;
  G4bool   fRDM;
  G4bool   fSampleTime;
  G4bool   fCorrelatedGamma;
  G4bool   isInitialised;
};
 
inline void G4PhotonEvaporation::SetVerboseLevel(G4int verbose)
{
  fVerbose = verbose;
}
 
inline void 
G4PhotonEvaporation::InitialiseLevelManager(G4int Z, G4int A)
{
  if(Z != theZ || A != theA) {
    theZ = Z;
    theA = A;
    fIndex = 0;
    fLevelManager = fNuclearLevelData->GetLevelManager(theZ, theA);
    fLevelEnergyMax = fLevelManager ? fLevelManager->MaxLevelEnergy() : 0.0;
  }
}
 
inline G4int G4PhotonEvaporation::GetVacantShellNumber() const 
{ 
  return vShellNumber;
}
 
#endif