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26 // 23 //
27 // ------------------------------------------- 24 // -------------------------------------------------------------------
28 // GEANT 4 class implementation file 25 // GEANT 4 class implementation file
29 // 26 //
30 // CERN, Geneva, Switzerland 27 // CERN, Geneva, Switzerland
31 // 28 //
32 // File name: G4SigmaPlusField.cc 29 // File name: G4SigmaPlusField.cc
33 // 30 //
34 // Author: Alessandro Brunengo (Al 31 // Author: Alessandro Brunengo (Alessandro.Brunengo@ge.infn.it)
35 // 32 //
36 // Creation date: 5 June 2000 33 // Creation date: 5 June 2000
37 // ------------------------------------------- 34 // -------------------------------------------------------------------
38 <<
39 #include "G4SigmaPlusField.hh" 35 #include "G4SigmaPlusField.hh"
40 #include "G4PhysicalConstants.hh" << 36 #include "G4NucleiPropertiesTable.hh"
41 #include "G4SystemOfUnits.hh" <<
42 #include "G4NucleiProperties.hh" <<
43 #include "G4VNuclearDensity.hh" 37 #include "G4VNuclearDensity.hh"
44 #include "G4FermiMomentum.hh" 38 #include "G4FermiMomentum.hh"
45 #include "G4SigmaPlus.hh" 39 #include "G4SigmaPlus.hh"
46 #include "G4HadTmpUtil.hh" 40 #include "G4HadTmpUtil.hh"
47 #include "G4Pow.hh" <<
48 41
49 G4SigmaPlusField::G4SigmaPlusField(G4V3DNucleu 42 G4SigmaPlusField::G4SigmaPlusField(G4V3DNucleus * nucleus, G4double coeff)
50 : G4VNuclearField(nucleus) 43 : G4VNuclearField(nucleus)
51 { 44 {
52 theCoeff = coeff; 45 theCoeff = coeff;
53 } 46 }
54 47
55 48
56 G4SigmaPlusField::~G4SigmaPlusField() 49 G4SigmaPlusField::~G4SigmaPlusField()
57 { } 50 { }
58 51
>> 52
>> 53 const G4SigmaPlusField & G4SigmaPlusField::operator=(const G4SigmaPlusField &)
>> 54 {
>> 55 throw G4HadronicException(__FILE__, __LINE__, "G4SigmaPlusField::operator= meant not to be accessible");
>> 56 return *this;
>> 57 }
>> 58
>> 59
>> 60 G4int G4SigmaPlusField::operator==(const G4SigmaPlusField &) const
>> 61 {
>> 62 throw G4HadronicException(__FILE__, __LINE__, "G4SigmaPlusField::operator== meant not to be accessible");
>> 63 return 0;
>> 64 }
>> 65
>> 66
>> 67 G4int G4SigmaPlusField::operator!=(const G4SigmaPlusField &) const
>> 68 {
>> 69 throw G4HadronicException(__FILE__, __LINE__, "G4SigmaPlusField::operator!= meant not to be accessible");
>> 70 return 1;
>> 71 }
>> 72
>> 73
>> 74
59 G4double G4SigmaPlusField::GetField(const G4Th 75 G4double G4SigmaPlusField::GetField(const G4ThreeVector & aPosition)
60 { 76 {
61 // Field is 0 out of the nucleus! 77 // Field is 0 out of the nucleus!
62 if(aPosition.mag() >= radius) return 0.0; 78 if(aPosition.mag() >= radius) return 0.0;
63 79
64 G4double sigmaPlusMass = G4SigmaPlus::SigmaP 80 G4double sigmaPlusMass = G4SigmaPlus::SigmaPlus()->GetPDGMass();
65 81
66 G4int A = theNucleus->GetMassNumber(); << 82 G4double A = theNucleus->GetMassNumber();
67 G4int Z = theNucleus->GetCharge(); << 83 G4double Z = theNucleus->GetCharge();
68 G4double bindingEnergy = G4NucleiProperties: << 84 G4double bindingEnergy = G4NucleiPropertiesTable::GetBindingEnergy(G4lrint(Z), G4lrint(A));
69 G4double nucleusMass = Z*proton_mass_c2+(A-Z 85 G4double nucleusMass = Z*proton_mass_c2+(A-Z)*neutron_mass_c2+bindingEnergy;
70 G4double reducedMass = sigmaPlusMass*nucleus 86 G4double reducedMass = sigmaPlusMass*nucleusMass/(sigmaPlusMass+nucleusMass);
71 87
72 const G4VNuclearDensity * nuclearDensity=the 88 const G4VNuclearDensity * nuclearDensity=theNucleus->GetNuclearDensity();
73 G4double density = nuclearDensity->GetDensit 89 G4double density = nuclearDensity->GetDensity(aPosition);
74 90
75 return -2.*pi*hbarc*hbarc/reducedMass*(2.0)* 91 return -2.*pi*hbarc*hbarc/reducedMass*(2.0)*theCoeff*density+GetBarrier();
76 } 92 }
77 93
>> 94
78 G4double G4SigmaPlusField::GetBarrier() 95 G4double G4SigmaPlusField::GetBarrier()
79 { 96 {
80 G4double A = theNucleus->GetMassNumber(); 97 G4double A = theNucleus->GetMassNumber();
81 G4double Z = theNucleus->GetCharge(); 98 G4double Z = theNucleus->GetCharge();
82 G4double coulombBarrier = (1.44/1.14) * MeV << 99 G4double coulombBarrier = (1.44/1.14) * MeV * Z / (1.0 + std::pow(A,1./3.));
83 return coulombBarrier; 100 return coulombBarrier;
84 } 101 }
85 102
86 103
87 104
88 105
89 106