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