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25 // 25 //
26 // 18-Sep-2003 First version is written by T. 26 // 18-Sep-2003 First version is written by T. Koi
27 // 12-Nov-2003 Add energy check at lower side 27 // 12-Nov-2003 Add energy check at lower side T. Koi
28 // 15-Nov-2006 Above 10GeV/n Cross Section bec 28 // 15-Nov-2006 Above 10GeV/n Cross Section become constant T. Koi (SLAC/SCCS)
29 // 23-Dec-2006 Isotope dependence adde by D. W 29 // 23-Dec-2006 Isotope dependence adde by D. Wright
30 // 14-Mar-2011 Moved constructor, destructor a <<
31 // 19-Aug-2011 V.Ivanchenko move to new design <<
32 // 30 //
33 31
34 #include "G4IonsShenCrossSection.hh" 32 #include "G4IonsShenCrossSection.hh"
35 #include "G4PhysicalConstants.hh" << 33 #include "G4ParticleTable.hh"
36 #include "G4SystemOfUnits.hh" << 34 #include "G4IonTable.hh"
37 #include "G4DynamicParticle.hh" <<
38 #include "G4NucleiProperties.hh" <<
39 #include "G4HadTmpUtil.hh" <<
40 #include "G4NistManager.hh" <<
41 <<
42 G4IonsShenCrossSection::G4IonsShenCrossSection <<
43 : G4VCrossSectionDataSet("IonsShen"), <<
44 upperLimit( 10*GeV ), <<
45 // lowerLimit( 10*MeV ), <<
46 r0 ( 1.1 ) <<
47 {} <<
48 35
49 G4IonsShenCrossSection::~G4IonsShenCrossSectio <<
50 {} <<
51 <<
52 void <<
53 G4IonsShenCrossSection::CrossSectionDescriptio <<
54 { <<
55 outFile << "G4IonsShenCrossSection calculate <<
56 << "section for nucleus-nucleus scat <<
57 << "parameterization. It is valid f <<
58 << "all Z, and projectile energies u <<
59 << "the cross section is constant. <<
60 << "is returned.\n"; <<
61 } <<
62 <<
63 G4bool G4IonsShenCrossSection::IsElementApplic <<
64 G4int, const G4Material*) <<
65 { <<
66 return (1 <= aDP->GetDefinition()->GetBaryon <<
67 } <<
68 <<
69 G4double <<
70 G4IonsShenCrossSection::GetElementCrossSection <<
71 G4int Z, <<
72 const G4Material*) <<
73 { <<
74 G4int A = G4lrint(G4NistManager::Instance()- <<
75 return GetIsoCrossSection(aParticle, Z, A); <<
76 } <<
77 <<
78 G4double G4IonsShenCrossSection::GetIsoCrossSe <<
79 G4int Zt, G4int At, <<
80 const G4Isotope*, <<
81 const G4Element*, <<
82 const G4Material*) <<
83 36
>> 37 G4double G4IonsShenCrossSection::
>> 38 GetIsoZACrossSection(const G4DynamicParticle* aParticle, G4double ZZ,
>> 39 G4double AA, G4double /*temperature*/)
84 { 40 {
85 G4double xsection = 0.0; 41 G4double xsection = 0.0;
86 42
87 G4int Ap = aParticle->GetDefinition()->GetB 43 G4int Ap = aParticle->GetDefinition()->GetBaryonNumber();
88 G4int Zp = G4lrint(aParticle->GetDefinition << 44 G4int Zp = int ( aParticle->GetDefinition()->GetPDGCharge() / eplus + 0.5 );
89 G4double ke_per_N = aParticle->GetKineticEn 45 G4double ke_per_N = aParticle->GetKineticEnergy() / Ap;
90 if ( ke_per_N > upperLimit ) { ke_per_N = u << 46 if ( ke_per_N > 10*GeV ) ke_per_N = 10*GeV;
91 47
92 // Apply energy check, if less than lower l << 48 // Apply energy check, if less than lower limit then 0 value is returned
93 //if ( ke_per_N < lowerLimit ) { return xs << 49 if ( ke_per_N < lowerLimit )
>> 50 return xsection;
94 51
95 G4Pow* g4pow = G4Pow::GetInstance(); << 52 G4int At = G4int(AA);
96 << 53 G4int Zt = G4int(ZZ);
97 G4double cubicrAt = g4pow->Z13(At); <<
98 G4double cubicrAp = g4pow->Z13(Ap); <<
99 54
>> 55 G4double one_third = 1.0 / 3.0;
>> 56
>> 57 G4double cubicrAt = std::pow ( G4double(At) , G4double(one_third) );
>> 58 G4double cubicrAp = std::pow ( G4double(Ap) , G4double(one_third) );
>> 59
100 G4double Rt = 1.12 * cubicrAt - 0.94 * ( 1. 60 G4double Rt = 1.12 * cubicrAt - 0.94 * ( 1.0 / cubicrAt );
101 G4double Rp = 1.12 * cubicrAp - 0.94 * ( 1. 61 G4double Rp = 1.12 * cubicrAp - 0.94 * ( 1.0 / cubicrAp );
102 62
103 G4double r = Rt + Rp + 3.2; // in fm 63 G4double r = Rt + Rp + 3.2; // in fm
104 G4double b = 1.0; // in MeV/fm 64 G4double b = 1.0; // in MeV/fm
105 G4double targ_mass = G4NucleiProperties::Ge <<
106 <<
107 G4double proj_mass = aParticle->GetMass(); <<
108 G4double proj_momentum = aParticle->GetMome <<
109 <<
110 G4double Ecm = calEcmValue (proj_mass, targ <<
111 65
112 G4double B = 1.44 * Zt * Zp / r - b * Rt * 66 G4double B = 1.44 * Zt * Zp / r - b * Rt * Rp / ( Rt + Rp );
113 if(Ecm <= B) { return xsection; } << 67
>> 68 //G4double ke_per_N = aParticle->GetKineticEnergy() / Ap;
114 69
115 G4double c = calCeValue ( ke_per_N / MeV ) 70 G4double c = calCeValue ( ke_per_N / MeV );
116 71
117 G4double R1 = r0 * (cubicrAt + cubicrAp + 1 << 72 G4double R1 = r0 * ( cubicrAt + cubicrAp + 1.85 * cubicrAt * cubicrAp / ( cubicrAt + cubicrAp ) - c);
118 73
119 G4double R2 = 1.0 * ( At - 2 * Zt ) * Zp / 74 G4double R2 = 1.0 * ( At - 2 * Zt ) * Zp / ( Ap * At );
120 75
>> 76 G4double targ_mass = G4ParticleTable::GetParticleTable()->GetIonTable()->GetIonMass( Zt , At );
>> 77 G4double proj_mass = aParticle->GetMass();
>> 78 G4double proj_momentum = aParticle->GetMomentum().mag();
>> 79
>> 80 G4double Ecm = calEcmValue ( proj_mass , targ_mass , proj_momentum );
121 81
122 G4double R3 = (0.176 / g4pow->A13(Ecm)) * c << 82 G4double R3 = 0.176 / std::pow ( G4double(Ecm) , G4double(one_third) ) * cubicrAt * cubicrAp / ( cubicrAt + cubicrAp );
123 83
124 G4double R = R1 + R2 + R3; 84 G4double R = R1 + R2 + R3;
125 85
126 xsection = 10 * pi * R * R * ( 1 - B / Ecm 86 xsection = 10 * pi * R * R * ( 1 - B / Ecm );
127 xsection = xsection * millibarn; // mulit << 87 xsection = xsection * millibarn; // mulitply xsection by millibarn
128 << 88
129 return xsection; 89 return xsection;
130 } 90 }
131 91
132 G4double << 92
133 G4IonsShenCrossSection::calEcmValue(const G4do << 93 G4double G4IonsShenCrossSection::
134 const G4do << 94 GetCrossSection(const G4DynamicParticle* aParticle, const G4Element* anElement,
>> 95 G4double temperature)
>> 96 {
>> 97 G4int nIso = anElement->GetNumberOfIsotopes();
>> 98 G4double xsection = 0;
>> 99
>> 100 if (nIso) {
>> 101 G4double sig;
>> 102 G4IsotopeVector* isoVector = anElement->GetIsotopeVector();
>> 103 G4double* abundVector = anElement->GetRelativeAbundanceVector();
>> 104 G4double ZZ;
>> 105 G4double AA;
>> 106
>> 107 for (G4int i = 0; i < nIso; i++) {
>> 108 ZZ = G4double( (*isoVector)[i]->GetZ() );
>> 109 AA = G4double( (*isoVector)[i]->GetN() );
>> 110 sig = GetIsoZACrossSection(aParticle, ZZ, AA, temperature);
>> 111 xsection += sig*abundVector[i];
>> 112 }
>> 113
>> 114 } else {
>> 115 xsection =
>> 116 GetIsoZACrossSection(aParticle, anElement->GetZ(), anElement->GetN(),
>> 117 temperature);
>> 118 }
>> 119
>> 120 return xsection;
>> 121 }
>> 122
>> 123
>> 124 G4double G4IonsShenCrossSection::calEcmValue( const G4double mp , const G4double mt , const G4double Plab )
135 { 125 {
136 G4double Elab = std::sqrt ( mp * mp + Plab 126 G4double Elab = std::sqrt ( mp * mp + Plab * Plab );
137 G4double Ecm = std::sqrt ( mp * mp + mt * m 127 G4double Ecm = std::sqrt ( mp * mp + mt * mt + 2 * Elab * mt );
138 G4double Pcm = Plab * mt / Ecm; 128 G4double Pcm = Plab * mt / Ecm;
139 G4double KEcm = std::sqrt ( Pcm * Pcm + mp 129 G4double KEcm = std::sqrt ( Pcm * Pcm + mp * mp ) - mp;
140 return KEcm; 130 return KEcm;
141 } 131 }
142 132
143 133
144 G4double G4IonsShenCrossSection::calCeValue(co << 134 G4double G4IonsShenCrossSection::calCeValue( const G4double ke )
145 { 135 {
146 // Calculate c value << 136 // Calculate c value
147 // This value is indepenent from projectile << 137 // This value is indepenent from projectile and target particle
148 // ke is projectile kinetic energy per nucle << 138 // ke is projectile kinetic energy per nucleon in the Lab system with MeV unit
149 // with MeV unit << 139 // fitting function is made by T. Koi
150 // fitting function is made by T. Koi << 140 // There are no data below 30 MeV/n in Kox et al.,
151 // There are no data below 30 MeV/n in Kox e <<
152 141
153 G4double Ce; 142 G4double Ce;
154 G4double log10_ke = std::log10 ( ke ); 143 G4double log10_ke = std::log10 ( ke );
155 if (log10_ke > 1.5) << 144 if ( log10_ke > 1.5 )
156 { 145 {
157 Ce = -10.0/std::pow(G4double(log10_ke), G << 146 Ce = - 10.0 / std::pow ( G4double(log10_ke) , G4double(5) ) + 2.0;
158 } 147 }
159 else 148 else
160 { 149 {
161 Ce = (-10.0/std::pow(G4double(1.5), G4dou << 150 Ce = ( - 10.0 / std::pow ( G4double(1.5) , G4double(5) ) + 2.0 ) / std::pow ( G4double(1.5) , G4double(3) ) * std::pow ( G4double(log10_ke) , G4double(3) );
162 std::pow(G4double(1.5) , G4double(3)) <<
163 } 151 }
164 return Ce; 152 return Ce;
165 } 153 }
166 <<
167 154