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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: G4PionZeroField.cc 29 // File name: G4PionZeroField.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 "G4PionZeroField.hh" 35 #include "G4PionZeroField.hh"
40 #include "G4PhysicalConstants.hh" << 36 #include "G4NucleiPropertiesTable.hh"
41 #include "G4NucleiProperties.hh" <<
42 #include "G4VNuclearDensity.hh" 37 #include "G4VNuclearDensity.hh"
43 #include "G4FermiMomentum.hh" 38 #include "G4FermiMomentum.hh"
44 #include "G4PionZero.hh" 39 #include "G4PionZero.hh"
45 #include "G4HadTmpUtil.hh" 40 #include "G4HadTmpUtil.hh"
46 41
>> 42
47 G4PionZeroField::G4PionZeroField(G4V3DNucleus 43 G4PionZeroField::G4PionZeroField(G4V3DNucleus * nucleus, G4double coeff)
48 : G4VNuclearField(nucleus) 44 : G4VNuclearField(nucleus)
49 { 45 {
50 theCoeff = coeff; 46 theCoeff = coeff;
51 } 47 }
52 48
53 49
54 G4PionZeroField::~G4PionZeroField() 50 G4PionZeroField::~G4PionZeroField()
55 { } 51 { }
56 52
>> 53
>> 54 const G4PionZeroField & G4PionZeroField::operator=(const G4PionZeroField &)
>> 55 {
>> 56 throw G4HadronicException(__FILE__, __LINE__, "G4PionZeroField::operator= meant not to be accessible");
>> 57 return *this;
>> 58 }
>> 59
>> 60
>> 61 G4int G4PionZeroField::operator==(const G4PionZeroField &) const
>> 62 {
>> 63 throw G4HadronicException(__FILE__, __LINE__, "G4PionZeroField::operator== meant not to be accessible");
>> 64 return 0;
>> 65 }
>> 66
>> 67
>> 68 G4int G4PionZeroField::operator!=(const G4PionZeroField &) const
>> 69 {
>> 70 throw G4HadronicException(__FILE__, __LINE__, "G4PionZeroField::operator!= meant not to be accessible");
>> 71 return 1;
>> 72 }
>> 73
>> 74
57 G4double G4PionZeroField::GetField(const G4Thr 75 G4double G4PionZeroField::GetField(const G4ThreeVector & aPosition)
58 { 76 {
59 // Field is 0 out of the nucleus! 77 // Field is 0 out of the nucleus!
60 if(aPosition.mag() >= radius) return 0.0; 78 if(aPosition.mag() >= radius) return 0.0;
61 79
62 G4double pionZeroMass = G4PionZero::PionZero 80 G4double pionZeroMass = G4PionZero::PionZero()->GetPDGMass();
63 G4int A = theNucleus->GetMassNumber(); << 81 G4double A = theNucleus->GetMassNumber();
64 G4int Z = theNucleus->GetCharge(); << 82 G4double Z = theNucleus->GetCharge();
65 83
66 G4double bindingEnergy = G4NucleiProperties: << 84 G4double bindingEnergy = G4NucleiPropertiesTable::GetBindingEnergy(G4lrint(Z), G4lrint(A));
67 G4double nucleusMass = Z*proton_mass_c2+(A-Z 85 G4double nucleusMass = Z*proton_mass_c2+(A-Z)*neutron_mass_c2+bindingEnergy;
68 G4double reducedMass = pionZeroMass*nucleusM 86 G4double reducedMass = pionZeroMass*nucleusMass/(pionZeroMass+nucleusMass);
69 87
70 88
71 G4double density = A*theNucleus->GetNuclearD 89 G4double density = A*theNucleus->GetNuclearDensity()->GetDensity(aPosition);
72 G4double nucleonMass = (proton_mass_c2+neutr 90 G4double nucleonMass = (proton_mass_c2+neutron_mass_c2)/2;
73 91
74 return 2.*pi*hbarc*hbarc/reducedMass*(1+pion 92 return 2.*pi*hbarc*hbarc/reducedMass*(1+pionZeroMass/nucleonMass)*theCoeff*density;
75 } 93 }
76 94
77 G4double G4PionZeroField::GetBarrier() 95 G4double G4PionZeroField::GetBarrier()
78 { 96 {
79 return 0; 97 return 0;
80 } 98 }
81 99