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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: G4AntiProtonField.cc 29 // File name: G4AntiProtonField.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 "G4AntiProtonField.hh" 35 #include "G4AntiProtonField.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 "G4ParticleDefinition.hh" 39 #include "G4ParticleDefinition.hh"
46 #include "G4AntiProton.hh" 40 #include "G4AntiProton.hh"
47 #include "G4HadTmpUtil.hh" 41 #include "G4HadTmpUtil.hh"
48 #include "G4Pow.hh" <<
49 42
50 G4AntiProtonField::G4AntiProtonField(G4V3DNucl 43 G4AntiProtonField::G4AntiProtonField(G4V3DNucleus * nucleus, G4double coeff)
51 : G4VNuclearField(nucleus) 44 : G4VNuclearField(nucleus)
52 { 45 {
53 theCoeff = coeff; 46 theCoeff = coeff;
54 } 47 }
55 48
56 49
57 G4AntiProtonField::~G4AntiProtonField() 50 G4AntiProtonField::~G4AntiProtonField()
58 { } 51 { }
59 52
60 53
>> 54 const G4AntiProtonField & G4AntiProtonField::operator=(const G4AntiProtonField & )
>> 55 {
>> 56 throw G4HadronicException(__FILE__, __LINE__, "G4AntiProtonField::operator= meant not to be accessible");
>> 57 return *this;
>> 58 }
>> 59
>> 60
>> 61 G4int G4AntiProtonField::operator==(const G4AntiProtonField & ) const
>> 62 {
>> 63 throw G4HadronicException(__FILE__, __LINE__, "G4AntiProtonField::operator== meant not to be accessible");
>> 64 return 0;
>> 65 }
>> 66
>> 67
>> 68 G4int G4AntiProtonField::operator!=(const G4AntiProtonField & ) const
>> 69 {
>> 70 throw G4HadronicException(__FILE__, __LINE__, "G4AntiProtonField::operator!= meant not to be accessible");
>> 71 return 1;
>> 72 }
>> 73
61 74
62 75
63 G4double G4AntiProtonField::GetField(const G4T 76 G4double G4AntiProtonField::GetField(const G4ThreeVector & aPosition)
64 { 77 {
65 // Field is 0 out of the nucleus! 78 // Field is 0 out of the nucleus!
66 if(aPosition.mag() >= radius) return 0.0; 79 if(aPosition.mag() >= radius) return 0.0;
67 80
68 const G4ParticleDefinition *anAntiProton = G << 81 G4ParticleDefinition *anAntiProton = G4AntiProton::AntiProtonDefinition();
69 G4double antiProtonMass = anAntiProton->GetP 82 G4double antiProtonMass = anAntiProton->GetPDGMass();
70 83
71 G4int A = theNucleus->GetMassNumber(); << 84 G4double A = theNucleus->GetMassNumber();
72 G4int Z = theNucleus->GetCharge(); << 85 G4double Z = theNucleus->GetCharge();
73 G4double bindingEnergy = G4NucleiProperties: << 86 G4double bindingEnergy = G4NucleiPropertiesTable::GetBindingEnergy(G4lrint(Z), G4lrint(A));
74 G4double nucleusMass = Z*proton_mass_c2+(A-Z 87 G4double nucleusMass = Z*proton_mass_c2+(A-Z)*neutron_mass_c2+bindingEnergy;
75 G4double reducedMass = antiProtonMass*nucleu 88 G4double reducedMass = antiProtonMass*nucleusMass/(antiProtonMass+nucleusMass);
76 89
77 G4double density = theNucleus->GetNuclearDen 90 G4double density = theNucleus->GetNuclearDensity()->GetDensity(aPosition);
78 91
79 return -2.*pi*hbarc*hbarc/reducedMass*(2.0)* 92 return -2.*pi*hbarc*hbarc/reducedMass*(2.0)*theCoeff*density+GetBarrier();
80 } 93 }
81 94
82 95
83 G4double G4AntiProtonField::GetBarrier() 96 G4double G4AntiProtonField::GetBarrier()
84 { 97 {
85 G4int A = theNucleus->GetMassNumber(); << 98 G4double A = theNucleus->GetMassNumber();
86 G4int Z = theNucleus->GetCharge(); << 99 G4double Z = theNucleus->GetCharge();
87 G4double coulombBarrier = (1.44/1.14) * MeV << 100 G4double coulombBarrier = (1.44/1.14) * MeV * Z / (1.0 + std::pow(A,1./3.));
88 return -coulombBarrier; 101 return -coulombBarrier;
89 } 102 }
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97 110