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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 <<
39 #include "G4SigmaZeroField.hh" 38 #include "G4SigmaZeroField.hh"
40 #include "G4PhysicalConstants.hh" <<
41 #include "G4NucleiProperties.hh" 39 #include "G4NucleiProperties.hh"
42 #include "G4VNuclearDensity.hh" 40 #include "G4VNuclearDensity.hh"
43 #include "G4FermiMomentum.hh" 41 #include "G4FermiMomentum.hh"
44 #include "G4SigmaZero.hh" 42 #include "G4SigmaZero.hh"
45 #include "G4HadTmpUtil.hh" 43 #include "G4HadTmpUtil.hh"
46 44
47 G4SigmaZeroField::G4SigmaZeroField(G4V3DNucleu 45 G4SigmaZeroField::G4SigmaZeroField(G4V3DNucleus * nucleus, G4double coeff)
48 : G4VNuclearField(nucleus) 46 : G4VNuclearField(nucleus)
49 { 47 {
50 theCoeff = coeff; 48 theCoeff = coeff;
51 } 49 }
52 50
>> 51
53 G4SigmaZeroField::~G4SigmaZeroField() 52 G4SigmaZeroField::~G4SigmaZeroField()
54 { } 53 { }
>> 54
>> 55
>> 56 const G4SigmaZeroField & G4SigmaZeroField::operator=(const G4SigmaZeroField &)
>> 57 {
>> 58 throw G4HadronicException(__FILE__, __LINE__, "G4SigmaZeroField::operator= meant not to be accessible");
>> 59 return *this;
>> 60 }
>> 61
>> 62
>> 63 G4int G4SigmaZeroField::operator==(const G4SigmaZeroField &) const
>> 64 {
>> 65 throw G4HadronicException(__FILE__, __LINE__, "G4SigmaZeroField::operator== meant not to be accessible");
>> 66 return 0;
>> 67 }
>> 68
>> 69
>> 70 G4int G4SigmaZeroField::operator!=(const G4SigmaZeroField &) const
>> 71 {
>> 72 throw G4HadronicException(__FILE__, __LINE__, "G4SigmaZeroField::operator!= meant not to be accessible");
>> 73 return 1;
>> 74 }
>> 75
>> 76
55 77
56 G4double G4SigmaZeroField::GetField(const G4Th 78 G4double G4SigmaZeroField::GetField(const G4ThreeVector & aPosition)
57 { 79 {
58 // Field is 0 out of the nucleus! 80 // Field is 0 out of the nucleus!
59 if(aPosition.mag() >= radius) return 0.0; 81 if(aPosition.mag() >= radius) return 0.0;
60 82
61 G4double sigmaZeroMass = G4SigmaZero::SigmaZ 83 G4double sigmaZeroMass = G4SigmaZero::SigmaZero()->GetPDGMass();
62 84
63 G4int A = theNucleus->GetMassNumber(); 85 G4int A = theNucleus->GetMassNumber();
64 G4int Z = theNucleus->GetCharge(); 86 G4int Z = theNucleus->GetCharge();
65 G4double bindingEnergy = G4NucleiProperties: 87 G4double bindingEnergy = G4NucleiProperties::GetBindingEnergy(A, Z);
66 G4double nucleusMass = Z*proton_mass_c2+(A-Z 88 G4double nucleusMass = Z*proton_mass_c2+(A-Z)*neutron_mass_c2+bindingEnergy;
67 G4double reducedMass = sigmaZeroMass*nucleus 89 G4double reducedMass = sigmaZeroMass*nucleusMass/(sigmaZeroMass+nucleusMass);
68 90
69 const G4VNuclearDensity * nuclearDensity=the 91 const G4VNuclearDensity * nuclearDensity=theNucleus->GetNuclearDensity();
70 G4double density = nuclearDensity->GetDensit 92 G4double density = nuclearDensity->GetDensity(aPosition);
71 93
72 return -2.*pi*hbarc*hbarc/reducedMass*(2.0)* 94 return -2.*pi*hbarc*hbarc/reducedMass*(2.0)*theCoeff*density;
73 } 95 }
74 96
75 97
76 G4double G4SigmaZeroField::GetBarrier() 98 G4double G4SigmaZeroField::GetBarrier()
77 { 99 {
78 return 0.; 100 return 0.;
79 } 101 }
80 102
81 103