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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: G4NeutronField.cc 29 // File name: G4NeutronField.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 "G4NeutronField.hh" 35 #include "G4NeutronField.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 39
>> 40
45 G4NeutronField::G4NeutronField(G4V3DNucleus * 41 G4NeutronField::G4NeutronField(G4V3DNucleus * aNucleus) :
46 G4VNuclearField(aNucleus), theDensity(theN 42 G4VNuclearField(aNucleus), theDensity(theNucleus->GetNuclearDensity())
47 { 43 {
48 theA = theNucleus->GetMassNumber(); 44 theA = theNucleus->GetMassNumber();
49 theZ = theNucleus->GetCharge(); 45 theZ = theNucleus->GetCharge();
50 theFermi.Init(theA, theZ); 46 theFermi.Init(theA, theZ);
51 theR = 2.*theNucleus->GetOuterRadius(); 47 theR = 2.*theNucleus->GetOuterRadius();
52 for (G4double aR=0.;aR<theR; aR+=0.3*fermi) << 48 G4double aR=0;
>> 49 while(aR<theR)
53 { 50 {
54 G4ThreeVector aPosition(0,0,aR); 51 G4ThreeVector aPosition(0,0,aR);
55 G4double density = GetDensity(aPosition); 52 G4double density = GetDensity(aPosition);
56 G4double fermiMom = GetFermiMomentum(densi 53 G4double fermiMom = GetFermiMomentum(density);
57 theFermiMomBuffer.push_back(fermiMom); 54 theFermiMomBuffer.push_back(fermiMom);
>> 55 aR+=0.3*fermi;
58 } 56 }
59 { 57 {
60 G4ThreeVector aPosition(0,0,theR); 58 G4ThreeVector aPosition(0,0,theR);
61 G4double density = GetDensity(aPosition); 59 G4double density = GetDensity(aPosition);
62 G4double fermiMom = GetFermiMomentum(density 60 G4double fermiMom = GetFermiMomentum(density);
63 theFermiMomBuffer.push_back(fermiMom); 61 theFermiMomBuffer.push_back(fermiMom);
64 } 62 }
65 { 63 {
66 G4ThreeVector aPosition(0,0,theR+0.001*fermi 64 G4ThreeVector aPosition(0,0,theR+0.001*fermi);
67 theFermiMomBuffer.push_back(0); 65 theFermiMomBuffer.push_back(0);
68 } 66 }
69 { 67 {
70 G4ThreeVector aPosition(0,0,1.*m); 68 G4ThreeVector aPosition(0,0,1.*m);
71 theFermiMomBuffer.push_back(0); 69 theFermiMomBuffer.push_back(0);
72 } 70 }
73 } 71 }
74 72
75 G4NeutronField::~G4NeutronField() 73 G4NeutronField::~G4NeutronField()
76 { } 74 { }
77 75
>> 76
>> 77 const G4NeutronField & G4NeutronField::operator=(const G4NeutronField &)
>> 78 {
>> 79 throw G4HadronicException(__FILE__, __LINE__, "G4NeutronField::operator= meant not to be accessible");
>> 80 return *this;
>> 81 }
>> 82
>> 83
>> 84 G4int G4NeutronField::operator==(const G4NeutronField &) const
>> 85 {
>> 86 throw G4HadronicException(__FILE__, __LINE__, "G4NeutronField::operator== meant not to be accessible");
>> 87 return 0;
>> 88 }
>> 89
>> 90
>> 91 G4int G4NeutronField::operator!=(const G4NeutronField &) const
>> 92 {
>> 93 throw G4HadronicException(__FILE__, __LINE__, "G4NeutronField::operator!= meant not to be accessible");
>> 94 return 1;
>> 95 }
>> 96
>> 97
78 G4double G4NeutronField::GetField(const G4Thre 98 G4double G4NeutronField::GetField(const G4ThreeVector & aPosition)
79 { 99 {
80 G4double x = aPosition.mag(); 100 G4double x = aPosition.mag();
81 unsigned int index = static_cast<unsigned in << 101 G4int index = static_cast<G4int>(x/(0.3*fermi) );
82 if( (index+2) > theFermiMomBuffer.size()) re << 102 if(index+2> static_cast<G4int>(theFermiMomBuffer.size())) return theFermiMomBuffer.back();
83 G4double y1 = theFermiMomBuffer[index]; 103 G4double y1 = theFermiMomBuffer[index];
84 G4double y2 = theFermiMomBuffer[index+1]; 104 G4double y2 = theFermiMomBuffer[index+1];
85 G4double x1 = (0.3*fermi)*index; 105 G4double x1 = (0.3*fermi)*index;
86 G4double x2 = (0.3*fermi)*(index+1); 106 G4double x2 = (0.3*fermi)*(index+1);
87 G4double fermiMom = y1 + (x-x1)*(y2-y1)/(x2- 107 G4double fermiMom = y1 + (x-x1)*(y2-y1)/(x2-x1);
88 return -1*(fermiMom*fermiMom)/(2*neutron_mas 108 return -1*(fermiMom*fermiMom)/(2*neutron_mass_c2);
89 } 109 }
>> 110
>> 111
90 112
91 G4double G4NeutronField::GetBarrier() 113 G4double G4NeutronField::GetBarrier()
92 { 114 {
93 /* 115 /*
94 * G4double A = theNucleus->GetMassNumber(); 116 * G4double A = theNucleus->GetMassNumber();
95 * G4double Z = theNucleus->GetCharge(); 117 * G4double Z = theNucleus->GetCharge();
96 * 118 *
97 * return G4NucleiPropertiesTable::GetBindin 119 * return G4NucleiPropertiesTable::GetBindingEnergy(Z, A)/A;
98 */ 120 */
99 return 0.; 121 return 0.;
100 } 122 }
101 123
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107 129