G4NeutronElasticXS.hh

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// -------------------------------------------------------------------
//
// GEANT4 Class header file
//
//
// File name:    G4NeutronElasticXS
//
// Author  Ivantchenko, Geant4, 3-AUG-09
//
 
// Class Description:
// This is a base class for neutron elastic hadronic cross section based on
// data files from G4PARTICLEXSDATA data set 
// Class Description - End

#ifndef G4NeutronElasticXS_h
#define G4NeutronElasticXS_h 1

#include "G4VCrossSectionDataSet.hh"
#include "globals.hh"
#include "G4Threading.hh"
#include <vector>

const G4int MAXZEL = 93;

class G4DynamicParticle;
class G4ParticleDefinition;
class G4Element;
class G4PhysicsVector;
class G4ComponentGGHadronNucleusXsc;
class G4NistManager;

class G4NeutronElasticXS : public G4VCrossSectionDataSet
{
public: 

  explicit G4NeutronElasticXS();

  ~G4NeutronElasticXS() final;
    
  static const char* Default_Name() {return "G4NeutronElasticXS";}

  G4bool IsElementApplicable(const G4DynamicParticle*, 
           G4int Z, const G4Material*) final;

  G4bool IsIsoApplicable(const G4DynamicParticle*, G4int Z, G4int A,
       const G4Element*, const G4Material*) final;

  G4double GetElementCrossSection(const G4DynamicParticle*, 
                G4int Z, const G4Material*) final; 

  G4double GetIsoCrossSection(const G4DynamicParticle*, G4int Z, G4int A,
                              const G4Isotope* iso,
                              const G4Element* elm,
                              const G4Material* mat) final;

  const G4Isotope* SelectIsotope(const G4Element*, 
                                 G4double kinEnergy, G4double logE) final;

  void BuildPhysicsTable(const G4ParticleDefinition&) final;

  void CrossSectionDescription(std::ostream&) const final;

  G4double IsoCrossSection(G4double ekin, G4double logE, G4int Z, G4int A);

private: 

  void Initialise(G4int Z);

  void InitialiseOnFly(G4int Z);

  const G4String& FindDirectoryPath();

  G4PhysicsVector* GetPhysicsVector(G4int Z);

  G4NeutronElasticXS & operator=(const G4NeutronElasticXS &right);
  G4NeutronElasticXS(const G4NeutronElasticXS&);
  
  G4NistManager* nist;
  G4ComponentGGHadronNucleusXsc* ggXsection;
  const G4ParticleDefinition* neutron;

  std::vector<G4double> temp;

  static G4PhysicsVector* data[MAXZEL];
  static G4double coeff[MAXZEL];
  static G4double aeff[MAXZEL];
  static G4String gDataDirectory;

  G4bool  isMaster;

#ifdef G4MULTITHREADED
  static G4Mutex neutronElasticXSMutex;
#endif
};

#endif