include/Geant4/G4NeutronElasticXS.hh

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0025 //
0026 //
0027 // -------------------------------------------------------------------
0028 //
0029 // GEANT4 Class header file
0030 //
0031 //
0032 // File name:    G4NeutronElasticXS
0033 //
0034 // Author  Ivantchenko, Geant4, 3-AUG-09
0035 //
0036
0037 // Class Description:
0038 // This is a base class for neutron elastic hadronic cross section based on
0039 // data files from G4PARTICLEXSDATA data set
0040 // Class Description - End
0041
0042 #ifndef G4NeutronElasticXS_h
0043 #define G4NeutronElasticXS_h 1
0044
0045 #include "G4VCrossSectionDataSet.hh"
0046 #include "globals.hh"
0047 #include "G4PhysicsVector.hh"
0048 #include <vector>
0049
0050 class G4DynamicParticle;
0051 class G4ParticleDefinition;
0052 class G4Element;
0053 class G4VComponentCrossSection;
0054
0055 class G4NeutronElasticXS final : public G4VCrossSectionDataSet
0056 {
0057 public:
0058
0059   G4NeutronElasticXS();
0060
0061   ~G4NeutronElasticXS() final;
0062
0063   static const char* Default_Name() {return "G4NeutronElasticXS";}
0064
0065   G4bool IsElementApplicable(const G4DynamicParticle*,
0066                  G4int Z, const G4Material*) final;
0067
0068   G4bool IsIsoApplicable(const G4DynamicParticle*, G4int Z, G4int A,
0069              const G4Element*, const G4Material*) final;
0070
0071   G4double GetElementCrossSection(const G4DynamicParticle*,
0072                       G4int Z, const G4Material*) final;
0073
0074   G4double GetIsoCrossSection(const G4DynamicParticle*, G4int Z, G4int A,
0075                               const G4Isotope* iso,
0076                               const G4Element* elm,
0077                               const G4Material* mat) final;
0078
0079   G4double ComputeCrossSectionPerElement(G4double kinEnergy, G4double loge,
0080                                          const G4ParticleDefinition*,
0081                                          const G4Element*,
0082                                          const G4Material*) final;
0083
0084   G4double ComputeIsoCrossSection(G4double kinEnergy, G4double loge,
0085                                   const G4ParticleDefinition*,
0086                                   G4int Z, G4int A,
0087                                   const G4Isotope* iso,
0088                                   const G4Element* elm,
0089                                   const G4Material* mat) final;
0090
0091   const G4Isotope* SelectIsotope(const G4Element*,
0092                                  G4double kinEnergy, G4double logE) final;
0093
0094   void BuildPhysicsTable(const G4ParticleDefinition&) final;
0095
0096   void CrossSectionDescription(std::ostream&) const final;
0097
0098   G4double ElementCrossSection(G4double kinEnergy, G4double loge, G4int Z);
0099
0100   G4NeutronElasticXS & operator=(const G4NeutronElasticXS &right) = delete;
0101   G4NeutronElasticXS(const G4NeutronElasticXS&) = delete;
0102
0103 private:
0104
0105   void Initialise(G4int Z);
0106
0107   void InitialiseOnFly(G4int Z);
0108
0109   const G4String& FindDirectoryPath();
0110
0111   inline G4PhysicsVector* GetPhysicsVector(G4int Z);
0112
0113   G4VComponentCrossSection* ggXsection = nullptr;
0114   const G4ParticleDefinition* neutron;
0115
0116   G4bool isFirst = false;
0117
0118   static const G4int MAXZEL = 93;
0119   static G4PhysicsVector* data[MAXZEL];
0120   static G4double coeff[MAXZEL];
0121   static G4String gDataDirectory;
0122   static G4bool fLock;
0123 };
0124
0125 inline
0126 G4PhysicsVector* G4NeutronElasticXS::GetPhysicsVector(G4int Z)
0127 {
0128   if(nullptr == data[Z]) { InitialiseOnFly(Z); }
0129   return data[Z];
0130 }
0131
0132 #endif