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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: G4AntiProtonField.cc 32 // File name: G4AntiProtonField.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 "G4AntiProtonField.hh" 38 #include "G4AntiProtonField.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 "G4ParticleDefinition.hh" 42 #include "G4ParticleDefinition.hh"
46 #include "G4AntiProton.hh" 43 #include "G4AntiProton.hh"
47 #include "G4HadTmpUtil.hh" 44 #include "G4HadTmpUtil.hh"
48 #include "G4Pow.hh" <<
49 45
50 G4AntiProtonField::G4AntiProtonField(G4V3DNucl 46 G4AntiProtonField::G4AntiProtonField(G4V3DNucleus * nucleus, G4double coeff)
51 : G4VNuclearField(nucleus) 47 : G4VNuclearField(nucleus)
52 { 48 {
53 theCoeff = coeff; 49 theCoeff = coeff;
54 } 50 }
55 51
56 52
57 G4AntiProtonField::~G4AntiProtonField() 53 G4AntiProtonField::~G4AntiProtonField()
58 { } 54 { }
59 55
60 56
>> 57 const G4AntiProtonField & G4AntiProtonField::operator=(const G4AntiProtonField & )
>> 58 {
>> 59 throw G4HadronicException(__FILE__, __LINE__, "G4AntiProtonField::operator= meant not to be accessible");
>> 60 return *this;
>> 61 }
>> 62
>> 63
>> 64 G4int G4AntiProtonField::operator==(const G4AntiProtonField & ) const
>> 65 {
>> 66 throw G4HadronicException(__FILE__, __LINE__, "G4AntiProtonField::operator== meant not to be accessible");
>> 67 return 0;
>> 68 }
>> 69
>> 70
>> 71 G4int G4AntiProtonField::operator!=(const G4AntiProtonField & ) const
>> 72 {
>> 73 throw G4HadronicException(__FILE__, __LINE__, "G4AntiProtonField::operator!= meant not to be accessible");
>> 74 return 1;
>> 75 }
>> 76
61 77
62 78
63 G4double G4AntiProtonField::GetField(const G4T 79 G4double G4AntiProtonField::GetField(const G4ThreeVector & aPosition)
64 { 80 {
65 // Field is 0 out of the nucleus! 81 // Field is 0 out of the nucleus!
66 if(aPosition.mag() >= radius) return 0.0; 82 if(aPosition.mag() >= radius) return 0.0;
67 83
68 const G4ParticleDefinition *anAntiProton = G << 84 G4ParticleDefinition *anAntiProton = G4AntiProton::AntiProtonDefinition();
69 G4double antiProtonMass = anAntiProton->GetP 85 G4double antiProtonMass = anAntiProton->GetPDGMass();
70 86
71 G4int A = theNucleus->GetMassNumber(); << 87 G4double A = theNucleus->GetMassNumber();
72 G4int Z = theNucleus->GetCharge(); << 88 G4double Z = theNucleus->GetCharge();
73 G4double bindingEnergy = G4NucleiProperties: << 89 G4double bindingEnergy = G4NucleiPropertiesTable::GetBindingEnergy(G4lrint(Z), G4lrint(A));
74 G4double nucleusMass = Z*proton_mass_c2+(A-Z 90 G4double nucleusMass = Z*proton_mass_c2+(A-Z)*neutron_mass_c2+bindingEnergy;
75 G4double reducedMass = antiProtonMass*nucleu 91 G4double reducedMass = antiProtonMass*nucleusMass/(antiProtonMass+nucleusMass);
76 92
77 G4double density = theNucleus->GetNuclearDen 93 G4double density = theNucleus->GetNuclearDensity()->GetDensity(aPosition);
78 94
79 return -2.*pi*hbarc*hbarc/reducedMass*(2.0)* 95 return -2.*pi*hbarc*hbarc/reducedMass*(2.0)*theCoeff*density+GetBarrier();
80 } 96 }
81 97
82 98
83 G4double G4AntiProtonField::GetBarrier() 99 G4double G4AntiProtonField::GetBarrier()
84 { 100 {
85 G4int A = theNucleus->GetMassNumber(); << 101 G4double A = theNucleus->GetMassNumber();
86 G4int Z = theNucleus->GetCharge(); << 102 G4double Z = theNucleus->GetCharge();
87 G4double coulombBarrier = (1.44/1.14) * MeV << 103 G4double coulombBarrier = (1.44/1.14) * MeV * Z / (1.0 + std::pow(A,1./3.));
88 return -coulombBarrier; 104 return -coulombBarrier;
89 } 105 }
90 106
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97 113