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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: G4PionZeroField.cc 32 // File name: G4PionZeroField.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 "G4PionZeroField.hh" 38 #include "G4PionZeroField.hh"
40 #include "G4PhysicalConstants.hh" << 39 #include "G4NucleiPropertiesTable.hh"
41 #include "G4NucleiProperties.hh" <<
42 #include "G4VNuclearDensity.hh" 40 #include "G4VNuclearDensity.hh"
43 #include "G4FermiMomentum.hh" 41 #include "G4FermiMomentum.hh"
44 #include "G4PionZero.hh" 42 #include "G4PionZero.hh"
45 #include "G4HadTmpUtil.hh" 43 #include "G4HadTmpUtil.hh"
46 44
>> 45
47 G4PionZeroField::G4PionZeroField(G4V3DNucleus 46 G4PionZeroField::G4PionZeroField(G4V3DNucleus * nucleus, G4double coeff)
48 : G4VNuclearField(nucleus) 47 : G4VNuclearField(nucleus)
49 { 48 {
50 theCoeff = coeff; 49 theCoeff = coeff;
51 } 50 }
52 51
53 52
54 G4PionZeroField::~G4PionZeroField() 53 G4PionZeroField::~G4PionZeroField()
55 { } 54 { }
56 55
>> 56
>> 57 const G4PionZeroField & G4PionZeroField::operator=(const G4PionZeroField &)
>> 58 {
>> 59 throw G4HadronicException(__FILE__, __LINE__, "G4PionZeroField::operator= meant not to be accessible");
>> 60 return *this;
>> 61 }
>> 62
>> 63
>> 64 G4int G4PionZeroField::operator==(const G4PionZeroField &) const
>> 65 {
>> 66 throw G4HadronicException(__FILE__, __LINE__, "G4PionZeroField::operator== meant not to be accessible");
>> 67 return 0;
>> 68 }
>> 69
>> 70
>> 71 G4int G4PionZeroField::operator!=(const G4PionZeroField &) const
>> 72 {
>> 73 throw G4HadronicException(__FILE__, __LINE__, "G4PionZeroField::operator!= meant not to be accessible");
>> 74 return 1;
>> 75 }
>> 76
>> 77
57 G4double G4PionZeroField::GetField(const G4Thr 78 G4double G4PionZeroField::GetField(const G4ThreeVector & aPosition)
58 { 79 {
59 // Field is 0 out of the nucleus! 80 // Field is 0 out of the nucleus!
60 if(aPosition.mag() >= radius) return 0.0; 81 if(aPosition.mag() >= radius) return 0.0;
61 82
62 G4double pionZeroMass = G4PionZero::PionZero 83 G4double pionZeroMass = G4PionZero::PionZero()->GetPDGMass();
63 G4int A = theNucleus->GetMassNumber(); << 84 G4double A = theNucleus->GetMassNumber();
64 G4int Z = theNucleus->GetCharge(); << 85 G4double Z = theNucleus->GetCharge();
65 86
66 G4double bindingEnergy = G4NucleiProperties: << 87 G4double bindingEnergy = G4NucleiPropertiesTable::GetBindingEnergy(G4lrint(Z), G4lrint(A));
67 G4double nucleusMass = Z*proton_mass_c2+(A-Z 88 G4double nucleusMass = Z*proton_mass_c2+(A-Z)*neutron_mass_c2+bindingEnergy;
68 G4double reducedMass = pionZeroMass*nucleusM 89 G4double reducedMass = pionZeroMass*nucleusMass/(pionZeroMass+nucleusMass);
69 90
70 91
71 G4double density = A*theNucleus->GetNuclearD 92 G4double density = A*theNucleus->GetNuclearDensity()->GetDensity(aPosition);
72 G4double nucleonMass = (proton_mass_c2+neutr 93 G4double nucleonMass = (proton_mass_c2+neutron_mass_c2)/2;
73 94
74 return 2.*pi*hbarc*hbarc/reducedMass*(1+pion 95 return 2.*pi*hbarc*hbarc/reducedMass*(1+pionZeroMass/nucleonMass)*theCoeff*density;
75 } 96 }
76 97
77 G4double G4PionZeroField::GetBarrier() 98 G4double G4PionZeroField::GetBarrier()
78 { 99 {
79 return 0; 100 return 0;
80 } 101 }
81 102