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27 // ------------------------------------------- 27 // -------------------------------------------------------------------
28 // GEANT 4 class implementation file 28 // GEANT 4 class implementation file
29 // 29 //
30 // CERN, Geneva, Switzerland 30 // CERN, Geneva, Switzerland
31 // 31 //
32 // File name: G4KaonMinusField.cc 32 // File name: G4KaonMinusField.cc
33 // 33 //
34 // Author: Alessandro Brunengo (Al 34 // Author: Alessandro Brunengo (Alessandro.Brunengo@ge.infn.it)
35 // 35 //
36 // Creation date: 5 June 2000 36 // Creation date: 5 June 2000
37 // ------------------------------------------- 37 // -------------------------------------------------------------------
38 38
39 #include "G4KaonMinusField.hh" 39 #include "G4KaonMinusField.hh"
40 #include "G4PhysicalConstants.hh" 40 #include "G4PhysicalConstants.hh"
41 #include "G4SystemOfUnits.hh" 41 #include "G4SystemOfUnits.hh"
42 #include "G4NucleiProperties.hh" 42 #include "G4NucleiProperties.hh"
43 #include "G4VNuclearDensity.hh" 43 #include "G4VNuclearDensity.hh"
44 #include "G4FermiMomentum.hh" 44 #include "G4FermiMomentum.hh"
45 #include "G4KaonMinus.hh" 45 #include "G4KaonMinus.hh"
46 #include "G4HadTmpUtil.hh" 46 #include "G4HadTmpUtil.hh"
47 #include "G4Pow.hh" <<
48 47
49 G4KaonMinusField::G4KaonMinusField(G4V3DNucleu 48 G4KaonMinusField::G4KaonMinusField(G4V3DNucleus * nucleus, G4double coeff)
50 : G4VNuclearField(nucleus) 49 : G4VNuclearField(nucleus)
51 { 50 {
52 theCoeff = coeff; 51 theCoeff = coeff;
53 } 52 }
54 53
55 54
56 G4KaonMinusField::~G4KaonMinusField() 55 G4KaonMinusField::~G4KaonMinusField()
57 { } 56 { }
58 57
59 58
60 G4double G4KaonMinusField::GetField(const G4Th 59 G4double G4KaonMinusField::GetField(const G4ThreeVector & aPosition)
61 { 60 {
62 // Field is 0 out of the nucleus! 61 // Field is 0 out of the nucleus!
63 if(aPosition.mag() >= radius) return 0.0; 62 if(aPosition.mag() >= radius) return 0.0;
64 63
65 G4double kaonMass = G4KaonMinus::KaonMinus() 64 G4double kaonMass = G4KaonMinus::KaonMinus()->GetPDGMass();
66 65
67 G4int A = theNucleus->GetMassNumber(); 66 G4int A = theNucleus->GetMassNumber();
68 G4int Z = theNucleus->GetCharge(); 67 G4int Z = theNucleus->GetCharge();
69 G4double bindingEnergy = G4NucleiProperties: 68 G4double bindingEnergy = G4NucleiProperties::GetBindingEnergy(A, Z);
70 G4double nucleusMass = Z*proton_mass_c2+(A-Z 69 G4double nucleusMass = Z*proton_mass_c2+(A-Z)*neutron_mass_c2+bindingEnergy;
71 G4double reducedMass = kaonMass*nucleusMass/ 70 G4double reducedMass = kaonMass*nucleusMass/(kaonMass+nucleusMass);
72 71
73 G4double density = theNucleus->GetNuclearDen 72 G4double density = theNucleus->GetNuclearDensity()->GetDensity(aPosition);
74 73
75 return -2.*pi*hbarc*hbarc/reducedMass*(2.0)* 74 return -2.*pi*hbarc*hbarc/reducedMass*(2.0)*theCoeff*density+GetBarrier();
76 } 75 }
77 76
78 77
79 G4double G4KaonMinusField::GetBarrier() 78 G4double G4KaonMinusField::GetBarrier()
80 { 79 {
81 G4int A = theNucleus->GetMassNumber(); 80 G4int A = theNucleus->GetMassNumber();
82 G4int Z = theNucleus->GetCharge(); 81 G4int Z = theNucleus->GetCharge();
83 G4double coulombBarrier = (1.44/1.14) * MeV << 82 G4double coulombBarrier = (1.44/1.14) * MeV * Z / (1.0 + std::pow(A,1./3.));
84 return -coulombBarrier; 83 return -coulombBarrier;
85 } 84 }
86 85
87 86