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G4NeutronElectronElModel.hh
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25 //
26 //
27 //
28 // Geant4 Header : G4NeutronElectronElModel
29 //
30 // 16.5.17 V.Grichine
31 //
32 // Modified:
33 //
34 // Class Description
35 // Default model for neutron-electron elastic scattering;
36 // Class Description - End
37 
38 #ifndef G4NeutronElectronElModel_h
39 #define G4NeutronElectronElModel_h 1
40 
41 #include "globals.hh"
42 #include "G4HadronElastic.hh"
43 #include "G4HadProjectile.hh"
44 #include "G4Nucleus.hh"
45 #include "G4NucleiProperties.hh"
46 
48 class G4PhysicsLogVector;
49 class G4PhysicsTable;
50 
52 {
53 public:
54 
55  G4NeutronElectronElModel(const G4String& name = "nu-e-elastic");
56 
57  virtual ~G4NeutronElectronElModel();
58 
59  virtual G4bool IsApplicable(const G4HadProjectile & aTrack,
60  G4Nucleus & targetNucleus);
61 
62  virtual G4HadFinalState * ApplyYourself(const G4HadProjectile & aTrack,
63  G4Nucleus & targetNucleus);
64 
65  void Initialise();
66 
68 
70 
71  inline G4double GetAm(){return fAm;};
72 
73 
74  // sample recoil electron energy in lab frame
75 
77  G4double GetTransfer( G4int iTkin, G4int iTransfer, G4double position );
78 
81 
82 
83 
84  virtual void ModelDescription(std::ostream&) const;
85 
86 private:
87 
92  G4double fCutEnergy; // minimal recoil electron energy detected
95 };
96 
98 //
99 // return Wentzel atom screening correction for neutron-electron scattering
100 
102 {
103  fee = (Tkin+fM)*fme/fM;
104  // G4cout<<"fee = "<<fee<<" MeV"<<G4endl;
105  fee2 = fee*fee;
106  G4double momentum = std::sqrt( fee2 - fme2 );
107  G4double k = momentum/CLHEP::hbarc;
108  G4double ch = 1.13;
109  G4double zn = 1.77*k*CLHEP::Bohr_radius;
110  G4double zn2 = zn*zn;
111  fAm = ch/zn2;
112 
113  return fAm;
114 }
115 
116 
117 #endif