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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: G4PionPlusField.cc 29 // File name: G4PionPlusField.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 "G4PionPlusField.hh" 35 #include "G4PionPlusField.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 "G4PionPlus.hh" 39 #include "G4PionPlus.hh"
46 #include "G4HadTmpUtil.hh" 40 #include "G4HadTmpUtil.hh"
47 #include "G4Pow.hh" << 41
48 42
49 G4PionPlusField::G4PionPlusField(G4V3DNucleus 43 G4PionPlusField::G4PionPlusField(G4V3DNucleus * nucleus, G4double coeff)
50 : G4VNuclearField(nucleus) 44 : G4VNuclearField(nucleus)
51 { 45 {
52 theCoeff = coeff; 46 theCoeff = coeff;
53 } 47 }
54 48
55 49
56 G4PionPlusField::~G4PionPlusField() 50 G4PionPlusField::~G4PionPlusField()
57 { } 51 { }
58 52
>> 53
>> 54 const G4PionPlusField & G4PionPlusField::operator=(const G4PionPlusField &)
>> 55 {
>> 56 throw G4HadronicException(__FILE__, __LINE__, "G4PionPlusField::operator= meant not to be accessible");
>> 57 return *this;
>> 58 }
>> 59
>> 60
>> 61 G4int G4PionPlusField::operator==(const G4PionPlusField &) const
>> 62 {
>> 63 throw G4HadronicException(__FILE__, __LINE__, "G4PionPlusField::operator== meant not to be accessible");
>> 64 return 0;
>> 65 }
>> 66
>> 67
>> 68 G4int G4PionPlusField::operator!=(const G4PionPlusField &) const
>> 69 {
>> 70 throw G4HadronicException(__FILE__, __LINE__, "G4PionPlusField::operator!= meant not to be accessible");
>> 71 return 1;
>> 72 }
>> 73
>> 74
59 G4double G4PionPlusField::GetField(const G4Thr 75 G4double G4PionPlusField::GetField(const G4ThreeVector & aPosition)
60 { 76 {
61 // Field is 0 out of the nucleus! 77 // Field is 0 out of the nucleus!
62 if(aPosition.mag() >= radius) return 0.0; 78 if(aPosition.mag() >= radius) return 0.0;
63 79
64 G4double pionPlusMass = G4PionPlus::PionPlus 80 G4double pionPlusMass = G4PionPlus::PionPlus()->GetPDGMass();
65 81
66 G4int A = theNucleus->GetMassNumber(); << 82 G4double A = theNucleus->GetMassNumber();
67 G4int Z = theNucleus->GetCharge(); << 83 G4double Z = theNucleus->GetCharge();
68 G4double bindingEnergy = G4NucleiProperties: << 84 G4double bindingEnergy = G4NucleiPropertiesTable::GetBindingEnergy(G4lrint(Z), G4lrint(A));
69 G4double nucleusMass = Z*proton_mass_c2+(A-Z 85 G4double nucleusMass = Z*proton_mass_c2+(A-Z)*neutron_mass_c2+bindingEnergy;
70 G4double reducedMass = pionPlusMass*nucleusM 86 G4double reducedMass = pionPlusMass*nucleusMass/(pionPlusMass+nucleusMass);
71 87
72 G4double density = A*theNucleus->GetNuclearD 88 G4double density = A*theNucleus->GetNuclearDensity()->GetDensity(aPosition);
73 G4double nucleonMass = (proton_mass_c2+neutr 89 G4double nucleonMass = (proton_mass_c2+neutron_mass_c2)/2;
74 90
75 return 2.*pi*hbarc*hbarc/reducedMass*(1+pion 91 return 2.*pi*hbarc*hbarc/reducedMass*(1+pionPlusMass/nucleonMass)*theCoeff*density + GetBarrier();
76 } 92 }
77 93
78 94
79 G4double G4PionPlusField::GetBarrier() 95 G4double G4PionPlusField::GetBarrier()
80 { 96 {
81 G4int A = theNucleus->GetMassNumber(); << 97 G4double A = theNucleus->GetMassNumber();
82 G4int Z = theNucleus->GetCharge(); << 98 G4double Z = theNucleus->GetCharge();
83 G4double coulombBarrier = (1.44/1.14) * MeV << 99 G4double coulombBarrier = (1.44/1.14) * MeV * Z / (1.0 + pow(A,1./3.));
84 return coulombBarrier; 100 return coulombBarrier;
85 } 101 }
86 102