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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: G4SigmaPlusField.cc 32 // File name: G4SigmaPlusField.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 "G4SigmaPlusField.hh" 38 #include "G4SigmaPlusField.hh"
40 #include "G4PhysicalConstants.hh" << 39 #include "G4NucleiPropertiesTable.hh"
41 #include "G4SystemOfUnits.hh" <<
42 #include "G4NucleiProperties.hh" <<
43 #include "G4VNuclearDensity.hh" 40 #include "G4VNuclearDensity.hh"
44 #include "G4FermiMomentum.hh" 41 #include "G4FermiMomentum.hh"
45 #include "G4SigmaPlus.hh" 42 #include "G4SigmaPlus.hh"
46 #include "G4HadTmpUtil.hh" 43 #include "G4HadTmpUtil.hh"
47 #include "G4Pow.hh" <<
48 44
49 G4SigmaPlusField::G4SigmaPlusField(G4V3DNucleu 45 G4SigmaPlusField::G4SigmaPlusField(G4V3DNucleus * nucleus, G4double coeff)
50 : G4VNuclearField(nucleus) 46 : G4VNuclearField(nucleus)
51 { 47 {
52 theCoeff = coeff; 48 theCoeff = coeff;
53 } 49 }
54 50
55 51
56 G4SigmaPlusField::~G4SigmaPlusField() 52 G4SigmaPlusField::~G4SigmaPlusField()
57 { } 53 { }
58 54
>> 55
>> 56 const G4SigmaPlusField & G4SigmaPlusField::operator=(const G4SigmaPlusField &)
>> 57 {
>> 58 throw G4HadronicException(__FILE__, __LINE__, "G4SigmaPlusField::operator= meant not to be accessible");
>> 59 return *this;
>> 60 }
>> 61
>> 62
>> 63 G4int G4SigmaPlusField::operator==(const G4SigmaPlusField &) const
>> 64 {
>> 65 throw G4HadronicException(__FILE__, __LINE__, "G4SigmaPlusField::operator== meant not to be accessible");
>> 66 return 0;
>> 67 }
>> 68
>> 69
>> 70 G4int G4SigmaPlusField::operator!=(const G4SigmaPlusField &) const
>> 71 {
>> 72 throw G4HadronicException(__FILE__, __LINE__, "G4SigmaPlusField::operator!= meant not to be accessible");
>> 73 return 1;
>> 74 }
>> 75
>> 76
>> 77
59 G4double G4SigmaPlusField::GetField(const G4Th 78 G4double G4SigmaPlusField::GetField(const G4ThreeVector & aPosition)
60 { 79 {
61 // Field is 0 out of the nucleus! 80 // Field is 0 out of the nucleus!
62 if(aPosition.mag() >= radius) return 0.0; 81 if(aPosition.mag() >= radius) return 0.0;
63 82
64 G4double sigmaPlusMass = G4SigmaPlus::SigmaP 83 G4double sigmaPlusMass = G4SigmaPlus::SigmaPlus()->GetPDGMass();
65 84
66 G4int A = theNucleus->GetMassNumber(); << 85 G4double A = theNucleus->GetMassNumber();
67 G4int Z = theNucleus->GetCharge(); << 86 G4double Z = theNucleus->GetCharge();
68 G4double bindingEnergy = G4NucleiProperties: << 87 G4double bindingEnergy = G4NucleiPropertiesTable::GetBindingEnergy(G4lrint(Z), G4lrint(A));
69 G4double nucleusMass = Z*proton_mass_c2+(A-Z 88 G4double nucleusMass = Z*proton_mass_c2+(A-Z)*neutron_mass_c2+bindingEnergy;
70 G4double reducedMass = sigmaPlusMass*nucleus 89 G4double reducedMass = sigmaPlusMass*nucleusMass/(sigmaPlusMass+nucleusMass);
71 90
72 const G4VNuclearDensity * nuclearDensity=the 91 const G4VNuclearDensity * nuclearDensity=theNucleus->GetNuclearDensity();
73 G4double density = nuclearDensity->GetDensit 92 G4double density = nuclearDensity->GetDensity(aPosition);
74 93
75 return -2.*pi*hbarc*hbarc/reducedMass*(2.0)* 94 return -2.*pi*hbarc*hbarc/reducedMass*(2.0)*theCoeff*density+GetBarrier();
76 } 95 }
77 96
>> 97
78 G4double G4SigmaPlusField::GetBarrier() 98 G4double G4SigmaPlusField::GetBarrier()
79 { 99 {
80 G4double A = theNucleus->GetMassNumber(); 100 G4double A = theNucleus->GetMassNumber();
81 G4double Z = theNucleus->GetCharge(); 101 G4double Z = theNucleus->GetCharge();
82 G4double coulombBarrier = (1.44/1.14) * MeV << 102 G4double coulombBarrier = (1.44/1.14) * MeV * Z / (1.0 + std::pow(A,1./3.));
83 return coulombBarrier; 103 return coulombBarrier;
84 } 104 }
85 105
86 106
87 107
88 108
89 109