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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: G4SigmaZeroField.cc 32 // File name: G4SigmaZeroField.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 "G4SigmaZeroField.hh" 39 #include "G4SigmaZeroField.hh"
40 #include "G4PhysicalConstants.hh" 40 #include "G4PhysicalConstants.hh"
41 #include "G4NucleiProperties.hh" 41 #include "G4NucleiProperties.hh"
42 #include "G4VNuclearDensity.hh" 42 #include "G4VNuclearDensity.hh"
43 #include "G4FermiMomentum.hh" 43 #include "G4FermiMomentum.hh"
44 #include "G4SigmaZero.hh" 44 #include "G4SigmaZero.hh"
45 #include "G4HadTmpUtil.hh" 45 #include "G4HadTmpUtil.hh"
46 46
47 G4SigmaZeroField::G4SigmaZeroField(G4V3DNucleu 47 G4SigmaZeroField::G4SigmaZeroField(G4V3DNucleus * nucleus, G4double coeff)
48 : G4VNuclearField(nucleus) 48 : G4VNuclearField(nucleus)
49 { 49 {
50 theCoeff = coeff; 50 theCoeff = coeff;
51 } 51 }
52 52
53 G4SigmaZeroField::~G4SigmaZeroField() 53 G4SigmaZeroField::~G4SigmaZeroField()
54 { } 54 { }
55 55
56 G4double G4SigmaZeroField::GetField(const G4Th 56 G4double G4SigmaZeroField::GetField(const G4ThreeVector & aPosition)
57 { 57 {
58 // Field is 0 out of the nucleus! 58 // Field is 0 out of the nucleus!
59 if(aPosition.mag() >= radius) return 0.0; 59 if(aPosition.mag() >= radius) return 0.0;
60 60
61 G4double sigmaZeroMass = G4SigmaZero::SigmaZ 61 G4double sigmaZeroMass = G4SigmaZero::SigmaZero()->GetPDGMass();
62 62
63 G4int A = theNucleus->GetMassNumber(); 63 G4int A = theNucleus->GetMassNumber();
64 G4int Z = theNucleus->GetCharge(); 64 G4int Z = theNucleus->GetCharge();
65 G4double bindingEnergy = G4NucleiProperties: 65 G4double bindingEnergy = G4NucleiProperties::GetBindingEnergy(A, Z);
66 G4double nucleusMass = Z*proton_mass_c2+(A-Z 66 G4double nucleusMass = Z*proton_mass_c2+(A-Z)*neutron_mass_c2+bindingEnergy;
67 G4double reducedMass = sigmaZeroMass*nucleus 67 G4double reducedMass = sigmaZeroMass*nucleusMass/(sigmaZeroMass+nucleusMass);
68 68
69 const G4VNuclearDensity * nuclearDensity=the 69 const G4VNuclearDensity * nuclearDensity=theNucleus->GetNuclearDensity();
70 G4double density = nuclearDensity->GetDensit 70 G4double density = nuclearDensity->GetDensity(aPosition);
71 71
72 return -2.*pi*hbarc*hbarc/reducedMass*(2.0)* 72 return -2.*pi*hbarc*hbarc/reducedMass*(2.0)*theCoeff*density;
73 } 73 }
74 74
75 75
76 G4double G4SigmaZeroField::GetBarrier() 76 G4double G4SigmaZeroField::GetBarrier()
77 { 77 {
78 return 0.; 78 return 0.;
79 } 79 }
80 80
81 81