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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: G4ProtonField.cc 29 // File name: G4ProtonField.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 "G4ProtonField.hh" 35 #include "G4ProtonField.hh"
40 #include "G4PhysicalConstants.hh" << 36 #include "G4NucleiPropertiesTable.hh"
41 #include "G4SystemOfUnits.hh" <<
42 #include "G4VNuclearDensity.hh" 37 #include "G4VNuclearDensity.hh"
43 #include "G4FermiMomentum.hh" 38 #include "G4FermiMomentum.hh"
44 #include "G4V3DNucleus.hh" 39 #include "G4V3DNucleus.hh"
45 #include "G4Pow.hh" <<
46 40
47 G4ProtonField::G4ProtonField(G4V3DNucleus * aN 41 G4ProtonField::G4ProtonField(G4V3DNucleus * aNucleus) :
48 G4VNuclearField(aNucleus), theDensity(theNu 42 G4VNuclearField(aNucleus), theDensity(theNucleus->GetNuclearDensity())
49 { 43 {
50 theA = theNucleus->GetMassNumber(); 44 theA = theNucleus->GetMassNumber();
51 theZ = theNucleus->GetCharge(); 45 theZ = theNucleus->GetCharge();
52 theBarrier = GetBarrier(); 46 theBarrier = GetBarrier();
53 theRadius = 2.*theNucleus->GetOuterRadius(); 47 theRadius = 2.*theNucleus->GetOuterRadius();
54 theFermi.Init(theA, theZ); 48 theFermi.Init(theA, theZ);
55 for (G4double aR=0.;aR<theRadius; aR+=0.3*fe << 49 G4double aR=0;
>> 50 while(aR<theRadius)
56 { 51 {
57 G4ThreeVector aPosition(0,0,aR); 52 G4ThreeVector aPosition(0,0,aR);
58 G4double density = GetDensity(aPosition); 53 G4double density = GetDensity(aPosition);
59 G4double fermiMom = GetFermiMomentum(densi 54 G4double fermiMom = GetFermiMomentum(density);
60 theFermiMomBuffer.push_back(fermiMom); 55 theFermiMomBuffer.push_back(fermiMom);
>> 56 aR+=0.3*fermi;
61 } 57 }
62 { 58 {
63 G4ThreeVector aPosition(0,0,theRadius); 59 G4ThreeVector aPosition(0,0,theRadius);
64 G4double density = GetDensity(aPosition); 60 G4double density = GetDensity(aPosition);
65 G4double fermiMom = GetFermiMomentum(density 61 G4double fermiMom = GetFermiMomentum(density);
66 theFermiMomBuffer.push_back(fermiMom); 62 theFermiMomBuffer.push_back(fermiMom);
67 } 63 }
68 { 64 {
69 G4ThreeVector aPosition(0,0,theRadius+0.001* 65 G4ThreeVector aPosition(0,0,theRadius+0.001*fermi);
70 theFermiMomBuffer.push_back(0); 66 theFermiMomBuffer.push_back(0);
71 } 67 }
72 { 68 {
73 G4ThreeVector aPosition(0,0,1.*m); 69 G4ThreeVector aPosition(0,0,1.*m);
74 theFermiMomBuffer.push_back(0); 70 theFermiMomBuffer.push_back(0);
75 } 71 }
76 } 72 }
77 73
78 74
79 G4ProtonField::~G4ProtonField() 75 G4ProtonField::~G4ProtonField()
80 { } 76 { }
81 77
>> 78
>> 79 const G4ProtonField & G4ProtonField::operator=(const G4ProtonField &)
>> 80 {
>> 81 throw G4HadronicException(__FILE__, __LINE__, "G4ProtonField::operator= meant not to be accessible");
>> 82 return *this;
>> 83 }
>> 84
>> 85
>> 86 G4int G4ProtonField::operator==(const G4ProtonField &) const
>> 87 {
>> 88 throw G4HadronicException(__FILE__, __LINE__, "G4ProtonField::operator== meant not to be accessible");
>> 89 return 0;
>> 90 }
>> 91
>> 92
>> 93 G4int G4ProtonField::operator!=(const G4ProtonField &) const
>> 94 {
>> 95 throw G4HadronicException(__FILE__, __LINE__, "G4ProtonField::operator!= meant not to be accessible");
>> 96 return 1;
>> 97 }
>> 98
>> 99
82 G4double G4ProtonField::GetField(const G4Three 100 G4double G4ProtonField::GetField(const G4ThreeVector & aPosition)
83 { 101 {
84 //G4cout << " Fermi Potential " << (fermiMom*f 102 //G4cout << " Fermi Potential " << (fermiMom*fermiMom)/(2*proton_mass_c2) <<G4endl;
85 G4double x = aPosition.mag(); 103 G4double x = aPosition.mag();
86 unsigned int index = static_cast<unsigned in << 104 G4int index = static_cast<G4int>(x/(0.3*fermi) );
87 if((index+2) > theFermiMomBuffer.size()) ret << 105 if(index+2>static_cast<G4int>(theFermiMomBuffer.size())) return theFermiMomBuffer.back();
88 G4double y1 = theFermiMomBuffer[index]; 106 G4double y1 = theFermiMomBuffer[index];
89 G4double y2 = theFermiMomBuffer[index+1]; 107 G4double y2 = theFermiMomBuffer[index+1];
90 G4double x1 = (0.3*fermi)*index; 108 G4double x1 = (0.3*fermi)*index;
91 G4double x2 = (0.3*fermi)*(index+1); 109 G4double x2 = (0.3*fermi)*(index+1);
92 G4double fermiMom = y1 + (x-x1)*(y2-y1)/(x2- 110 G4double fermiMom = y1 + (x-x1)*(y2-y1)/(x2-x1);
93 G4double y = -1*(fermiMom*fermiMom)/(2*proto 111 G4double y = -1*(fermiMom*fermiMom)/(2*proton_mass_c2)+theBarrier;
94 // G4cout <<" Protonfield test "<<index<<" "< 112 // G4cout <<" Protonfield test "<<index<<" "<< x1<<" "<<y1<<" "<<x2<<" "<<y2<<" "<<x<<" "<<y<<" "<<theBarrier<<G4endl;
95 return y; 113 return y;
96 } 114 }
97 115
>> 116
>> 117
98 G4double G4ProtonField::GetBarrier() 118 G4double G4ProtonField::GetBarrier()
99 { 119 {
100 G4double coulombBarrier = (1.44/1.14) * MeV << 120 G4double coulombBarrier = (1.44/1.14) * MeV * theZ / (1.0 + std::pow(theA,1./3.));
101 //GF G4double bindingEnergy = G4NucleiProper 121 //GF G4double bindingEnergy = G4NucleiPropertiesTable::GetBindingEnergy(Z, A);
102 G4double bindingEnergy =0; 122 G4double bindingEnergy =0;
103 /* 123 /*
104 * G4cout << " coulombBarrier/bindingEnergy 124 * G4cout << " coulombBarrier/bindingEnergy : "
105 * << coulombBarrier << " /" << bindingEne 125 * << coulombBarrier << " /" << bindingEnergy << G4endl;
106 */ 126 */
107 return bindingEnergy/theA+coulombBarrier; 127 return bindingEnergy/theA+coulombBarrier;
108 } 128 }
>> 129
>> 130
109 131