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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: G4ProtonField.cc 32 // File name: G4ProtonField.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 "G4ProtonField.hh" 38 #include "G4ProtonField.hh"
40 #include "G4PhysicalConstants.hh" << 39 #include "G4NucleiPropertiesTable.hh"
41 #include "G4SystemOfUnits.hh" <<
42 #include "G4VNuclearDensity.hh" 40 #include "G4VNuclearDensity.hh"
43 #include "G4FermiMomentum.hh" 41 #include "G4FermiMomentum.hh"
44 #include "G4V3DNucleus.hh" 42 #include "G4V3DNucleus.hh"
45 #include "G4Pow.hh" <<
46 43
47 G4ProtonField::G4ProtonField(G4V3DNucleus * aN 44 G4ProtonField::G4ProtonField(G4V3DNucleus * aNucleus) :
48 G4VNuclearField(aNucleus), theDensity(theNu 45 G4VNuclearField(aNucleus), theDensity(theNucleus->GetNuclearDensity())
49 { 46 {
50 theA = theNucleus->GetMassNumber(); 47 theA = theNucleus->GetMassNumber();
51 theZ = theNucleus->GetCharge(); 48 theZ = theNucleus->GetCharge();
52 theBarrier = GetBarrier(); 49 theBarrier = GetBarrier();
53 theRadius = 2.*theNucleus->GetOuterRadius(); 50 theRadius = 2.*theNucleus->GetOuterRadius();
54 theFermi.Init(theA, theZ); 51 theFermi.Init(theA, theZ);
55 for (G4double aR=0.;aR<theRadius; aR+=0.3*fe << 52 G4double aR=0;
>> 53 while(aR<theRadius)
56 { 54 {
57 G4ThreeVector aPosition(0,0,aR); 55 G4ThreeVector aPosition(0,0,aR);
58 G4double density = GetDensity(aPosition); 56 G4double density = GetDensity(aPosition);
59 G4double fermiMom = GetFermiMomentum(densi 57 G4double fermiMom = GetFermiMomentum(density);
60 theFermiMomBuffer.push_back(fermiMom); 58 theFermiMomBuffer.push_back(fermiMom);
>> 59 aR+=0.3*fermi;
61 } 60 }
62 { 61 {
63 G4ThreeVector aPosition(0,0,theRadius); 62 G4ThreeVector aPosition(0,0,theRadius);
64 G4double density = GetDensity(aPosition); 63 G4double density = GetDensity(aPosition);
65 G4double fermiMom = GetFermiMomentum(density 64 G4double fermiMom = GetFermiMomentum(density);
66 theFermiMomBuffer.push_back(fermiMom); 65 theFermiMomBuffer.push_back(fermiMom);
67 } 66 }
68 { 67 {
69 G4ThreeVector aPosition(0,0,theRadius+0.001* 68 G4ThreeVector aPosition(0,0,theRadius+0.001*fermi);
70 theFermiMomBuffer.push_back(0); 69 theFermiMomBuffer.push_back(0);
71 } 70 }
72 { 71 {
73 G4ThreeVector aPosition(0,0,1.*m); 72 G4ThreeVector aPosition(0,0,1.*m);
74 theFermiMomBuffer.push_back(0); 73 theFermiMomBuffer.push_back(0);
75 } 74 }
76 } 75 }
77 76
78 77
79 G4ProtonField::~G4ProtonField() 78 G4ProtonField::~G4ProtonField()
80 { } 79 { }
81 80
>> 81
>> 82 const G4ProtonField & G4ProtonField::operator=(const G4ProtonField &)
>> 83 {
>> 84 throw G4HadronicException(__FILE__, __LINE__, "G4ProtonField::operator= meant not to be accessible");
>> 85 return *this;
>> 86 }
>> 87
>> 88
>> 89 G4int G4ProtonField::operator==(const G4ProtonField &) const
>> 90 {
>> 91 throw G4HadronicException(__FILE__, __LINE__, "G4ProtonField::operator== meant not to be accessible");
>> 92 return 0;
>> 93 }
>> 94
>> 95
>> 96 G4int G4ProtonField::operator!=(const G4ProtonField &) const
>> 97 {
>> 98 throw G4HadronicException(__FILE__, __LINE__, "G4ProtonField::operator!= meant not to be accessible");
>> 99 return 1;
>> 100 }
>> 101
>> 102
82 G4double G4ProtonField::GetField(const G4Three 103 G4double G4ProtonField::GetField(const G4ThreeVector & aPosition)
83 { 104 {
84 //G4cout << " Fermi Potential " << (fermiMom*f 105 //G4cout << " Fermi Potential " << (fermiMom*fermiMom)/(2*proton_mass_c2) <<G4endl;
85 G4double x = aPosition.mag(); 106 G4double x = aPosition.mag();
86 unsigned int index = static_cast<unsigned in << 107 G4int index = static_cast<G4int>(x/(0.3*fermi) );
87 if((index+2) > theFermiMomBuffer.size()) ret << 108 if(index+2>static_cast<G4int>(theFermiMomBuffer.size())) return theFermiMomBuffer.back();
88 G4double y1 = theFermiMomBuffer[index]; 109 G4double y1 = theFermiMomBuffer[index];
89 G4double y2 = theFermiMomBuffer[index+1]; 110 G4double y2 = theFermiMomBuffer[index+1];
90 G4double x1 = (0.3*fermi)*index; 111 G4double x1 = (0.3*fermi)*index;
91 G4double x2 = (0.3*fermi)*(index+1); 112 G4double x2 = (0.3*fermi)*(index+1);
92 G4double fermiMom = y1 + (x-x1)*(y2-y1)/(x2- 113 G4double fermiMom = y1 + (x-x1)*(y2-y1)/(x2-x1);
93 G4double y = -1*(fermiMom*fermiMom)/(2*proto 114 G4double y = -1*(fermiMom*fermiMom)/(2*proton_mass_c2)+theBarrier;
94 // G4cout <<" Protonfield test "<<index<<" "< 115 // G4cout <<" Protonfield test "<<index<<" "<< x1<<" "<<y1<<" "<<x2<<" "<<y2<<" "<<x<<" "<<y<<" "<<theBarrier<<G4endl;
95 return y; 116 return y;
96 } 117 }
97 118
>> 119
>> 120
98 G4double G4ProtonField::GetBarrier() 121 G4double G4ProtonField::GetBarrier()
99 { 122 {
100 G4double coulombBarrier = (1.44/1.14) * MeV << 123 G4double coulombBarrier = (1.44/1.14) * MeV * theZ / (1.0 + std::pow(theA,1./3.));
101 //GF G4double bindingEnergy = G4NucleiProper 124 //GF G4double bindingEnergy = G4NucleiPropertiesTable::GetBindingEnergy(Z, A);
102 G4double bindingEnergy =0; 125 G4double bindingEnergy =0;
103 /* 126 /*
104 * G4cout << " coulombBarrier/bindingEnergy 127 * G4cout << " coulombBarrier/bindingEnergy : "
105 * << coulombBarrier << " /" << bindingEne 128 * << coulombBarrier << " /" << bindingEnergy << G4endl;
106 */ 129 */
107 return bindingEnergy/theA+coulombBarrier; 130 return bindingEnergy/theA+coulombBarrier;
108 } 131 }
>> 132
>> 133
109 134