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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: G4SigmaMinusField.cc 29 // File name: G4SigmaMinusField.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 "G4SigmaMinusField.hh" 35 #include "G4SigmaMinusField.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 "G4SigmaMinus.hh" 39 #include "G4SigmaMinus.hh"
46 #include "G4HadTmpUtil.hh" 40 #include "G4HadTmpUtil.hh"
47 #include "G4Pow.hh" <<
48 41
49 G4SigmaMinusField::G4SigmaMinusField(G4V3DNucl 42 G4SigmaMinusField::G4SigmaMinusField(G4V3DNucleus * nucleus, G4double coeff)
50 : G4VNuclearField(nucleus) 43 : G4VNuclearField(nucleus)
51 { 44 {
52 theCoeff = coeff; 45 theCoeff = coeff;
53 } 46 }
54 47
55 G4SigmaMinusField::~G4SigmaMinusField() 48 G4SigmaMinusField::~G4SigmaMinusField()
56 { } 49 { }
57 50
>> 51
>> 52 const G4SigmaMinusField & G4SigmaMinusField::operator=(const G4SigmaMinusField &)
>> 53 {
>> 54 throw G4HadronicException(__FILE__, __LINE__, "G4SigmaMinusField::operator= meant not to be accessible");
>> 55 return *this;
>> 56 }
>> 57
>> 58
>> 59 G4int G4SigmaMinusField::operator==(const G4SigmaMinusField &) const
>> 60 {
>> 61 throw G4HadronicException(__FILE__, __LINE__, "G4SigmaMinusField::operator== meant not to be accessible");
>> 62 return 0;
>> 63 }
>> 64
>> 65
>> 66 G4int G4SigmaMinusField::operator!=(const G4SigmaMinusField &) const
>> 67 {
>> 68 throw G4HadronicException(__FILE__, __LINE__, "G4SigmaMinusField::operator!= meant not to be accessible");
>> 69 return 1;
>> 70 }
>> 71
>> 72
>> 73
58 G4double G4SigmaMinusField::GetField(const G4T 74 G4double G4SigmaMinusField::GetField(const G4ThreeVector & aPosition)
59 { 75 {
60 // Field is 0 out of the nucleus! 76 // Field is 0 out of the nucleus!
61 if(aPosition.mag() >= radius) return 0.0; 77 if(aPosition.mag() >= radius) return 0.0;
62 78
63 G4double sigmaMinusMass = G4SigmaMinus::Sigm 79 G4double sigmaMinusMass = G4SigmaMinus::SigmaMinus()->GetPDGMass();
64 80
65 G4int A = theNucleus->GetMassNumber(); << 81 G4double A = theNucleus->GetMassNumber();
66 G4int Z = theNucleus->GetCharge(); << 82 G4double Z = theNucleus->GetCharge();
67 G4double bindingEnergy = G4NucleiProperties: << 83 G4double bindingEnergy = G4NucleiPropertiesTable::GetBindingEnergy(G4lrint(Z), G4lrint(A));
68 G4double nucleusMass = Z*proton_mass_c2+(A-Z 84 G4double nucleusMass = Z*proton_mass_c2+(A-Z)*neutron_mass_c2+bindingEnergy;
69 G4double reducedMass = sigmaMinusMass*nucleu 85 G4double reducedMass = sigmaMinusMass*nucleusMass/(sigmaMinusMass+nucleusMass);
70 86
71 const G4VNuclearDensity * nuclearDensity=the 87 const G4VNuclearDensity * nuclearDensity=theNucleus->GetNuclearDensity();
72 G4double density = nuclearDensity->GetDensit 88 G4double density = nuclearDensity->GetDensity(aPosition);
73 89
74 return -2.*pi*hbarc*hbarc/reducedMass*(2.0)* 90 return -2.*pi*hbarc*hbarc/reducedMass*(2.0)*theCoeff*density+GetBarrier();
75 } 91 }
76 92
>> 93
77 G4double G4SigmaMinusField::GetBarrier() 94 G4double G4SigmaMinusField::GetBarrier()
78 { 95 {
79 G4double A = theNucleus->GetMassNumber(); 96 G4double A = theNucleus->GetMassNumber();
80 G4double Z = theNucleus->GetCharge(); 97 G4double Z = theNucleus->GetCharge();
81 G4double coulombBarrier = (1.44/1.14) * MeV << 98 G4double coulombBarrier = (1.44/1.14) * MeV * Z / (1.0 + pow(A,1./3.));
82 return -coulombBarrier; 99 return -coulombBarrier;
83 } 100 }
84 101
85 102