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25 // 25 //
26 // Calculation of the total, elastic and inel 26 // Calculation of the total, elastic and inelastic cross-sections
27 // of anti-nucleon and anti-nucleus interacti 27 // of anti-nucleon and anti-nucleus interactions with nuclei
28 // based on Glauber approach and V. Grishine 28 // based on Glauber approach and V. Grishine formulaes for
29 // interpolations (ref. V.M.Grichine, Eur.Phy 29 // interpolations (ref. V.M.Grichine, Eur.Phys.J., C62(2009) 399;
30 // NIM, B267 (2009) 2460) and our parametriza 30 // NIM, B267 (2009) 2460) and our parametrization of hadron-nucleon
31 // cross-sections 31 // cross-sections
32 // 32 //
33 // 33 //
34 // Created by A.Galoyan and V. Uzhinsky, 18. 34 // Created by A.Galoyan and V. Uzhinsky, 18.11.2010
35 35
36 36
37 #include "G4ComponentAntiNuclNuclearXS.hh" 37 #include "G4ComponentAntiNuclNuclearXS.hh"
38 38
39 #include "G4PhysicalConstants.hh" 39 #include "G4PhysicalConstants.hh"
40 #include "G4SystemOfUnits.hh" 40 #include "G4SystemOfUnits.hh"
41 #include "G4ParticleTable.hh" 41 #include "G4ParticleTable.hh"
42 #include "G4IonTable.hh" 42 #include "G4IonTable.hh"
43 #include "G4ParticleDefinition.hh" 43 #include "G4ParticleDefinition.hh"
44 #include "G4HadronicException.hh" 44 #include "G4HadronicException.hh"
45 45
46 46
47 ////////////////////////////////////////////// 47 /////////////////////////////////////////////////////////////////////////////
48 48
49 G4ComponentAntiNuclNuclearXS::G4ComponentAntiN 49 G4ComponentAntiNuclNuclearXS::G4ComponentAntiNuclNuclearXS()
50 : G4VComponentCrossSection("AntiAGlauber"), 50 : G4VComponentCrossSection("AntiAGlauber"),
51 fRadiusEff(0.0), 51 fRadiusEff(0.0),
52 fTotalXsc(0.0), fElasticXsc(0.0), fInelastic 52 fTotalXsc(0.0), fElasticXsc(0.0), fInelasticXsc(0.0),
53 fAntiHadronNucleonTotXsc(0.0), fAntiHadronNu 53 fAntiHadronNucleonTotXsc(0.0), fAntiHadronNucleonElXsc(0.0),
54 Elab(0.0), S(0.0), SqrtS(0) 54 Elab(0.0), S(0.0), SqrtS(0)
55 { 55 {
56 theAProton = G4AntiProton::AntiProton(); 56 theAProton = G4AntiProton::AntiProton();
57 theANeutron = G4AntiNeutron::AntiNeutron(); 57 theANeutron = G4AntiNeutron::AntiNeutron();
58 theADeuteron = G4AntiDeuteron::AntiDeuteron( 58 theADeuteron = G4AntiDeuteron::AntiDeuteron();
59 theATriton = G4AntiTriton::AntiTriton(); 59 theATriton = G4AntiTriton::AntiTriton();
60 theAAlpha = G4AntiAlpha::AntiAlpha(); 60 theAAlpha = G4AntiAlpha::AntiAlpha();
61 theAHe3 = G4AntiHe3::AntiHe3(); 61 theAHe3 = G4AntiHe3::AntiHe3();
62 Mn = 0.93827231; // GeV 62 Mn = 0.93827231; // GeV
63 b0 = 11.92; // GeV^(-2) 63 b0 = 11.92; // GeV^(-2)
64 b2 = 0.3036; // GeV^(-2) 64 b2 = 0.3036; // GeV^(-2)
65 SqrtS0 = 20.74; // GeV 65 SqrtS0 = 20.74; // GeV
66 S0 = 33.0625; // GeV^2 66 S0 = 33.0625; // GeV^2
67 R0 = 1.0; // default va 67 R0 = 1.0; // default value (V.Ivanchenko)
68 } 68 }
69 69
70 70
71 ////////////////////////////////////////////// 71 /////////////////////////////////////////////////////////////////////////////
72 72
73 G4ComponentAntiNuclNuclearXS::~G4ComponentAnti 73 G4ComponentAntiNuclNuclearXS::~G4ComponentAntiNuclNuclearXS()
74 { 74 {
75 } 75 }
76 76
77 77
78 ////////////////////////////////////////////// 78 /////////////////////////////////////////////////////////////////////////////
79 // 79 //
80 // Calculation of total CrossSection of Anti-N 80 // Calculation of total CrossSection of Anti-Nucleus - Nucleus
81 81
82 G4double G4ComponentAntiNuclNuclearXS::GetTota 82 G4double G4ComponentAntiNuclNuclearXS::GetTotalElementCrossSection
83 (const G4ParticleDefinition* aParticle, G4doub 83 (const G4ParticleDefinition* aParticle, G4double kinEnergy, G4int Z, G4double A)
84 { 84 {
85 if ( aParticle == nullptr ) { <<
86 G4ExceptionDescription ed; <<
87 ed << "anti-nucleus with nullptr particle <<
88 G4Exception( "G4ComponentAntiNuclNuclearXS <<
89 "antiNuclNuclearXS001", JustW <<
90 return 0.0; <<
91 } <<
92 <<
93 const G4ParticleDefinition* theParticle = aP 85 const G4ParticleDefinition* theParticle = aParticle;
94 G4double sigmaTotal = GetAntiHadronNucleonTo 86 G4double sigmaTotal = GetAntiHadronNucleonTotCrSc(theParticle,kinEnergy);
95 87
96 // calculation of squared radius of NN-coll 88 // calculation of squared radius of NN-collision
97 G4int i(-1), j(-1); 89 G4int i(-1), j(-1);
98 if ( theParticle == theAProton || 90 if ( theParticle == theAProton ||
99 theParticle == theANeutron ) { i=0; } 91 theParticle == theANeutron ) { i=0; }
100 else if ( theParticle == theADeuteron ) { i= 92 else if ( theParticle == theADeuteron ) { i=1; }
101 else if ( theParticle == theATriton ) { i= 93 else if ( theParticle == theATriton ) { i=2; }
102 else if ( theParticle == theAHe3 ) { i= 94 else if ( theParticle == theAHe3 ) { i=3; }
103 else if ( theParticle == theAAlpha ) { i= 95 else if ( theParticle == theAAlpha ) { i=4; }
104 else {}; 96 else {};
105 97
106 if ( i < 0 && ( ! theParticle->IsAntiHypern << 98 if ( i < 0 ) {
107 G4ExceptionDescription ed; 99 G4ExceptionDescription ed;
108 ed << "Unknown anti-nucleus : " << thePart << 100 ed << "Unknown anti-nucleus : "
>> 101 << ( theParticle != nullptr ? theParticle->GetParticleName() : "nullptr" ) << G4endl
109 << "Target (Z, A)=(" << Z << "," << A < 102 << "Target (Z, A)=(" << Z << "," << A << ")" << G4endl;
110 G4Exception( "G4ComponentAntiNuclNuclearXS 103 G4Exception( "G4ComponentAntiNuclNuclearXS::GetTotalElementCrossSection",
111 "antiNuclNuclearXS002", JustW << 104 "antiNuclNuclearXS001", JustWarning, ed );
112 } 105 }
113 106
114 G4int intA = static_cast<G4int>( A ); << 107 if ( Z == 1 && A == 1 ) { j=0; }
115 << 108 else if ( Z == 1 && A == 2 ) { j=1; }
116 if ( Z == 1 && intA == 1 ) { j=0; } << 109 else if ( Z == 1 && A == 3 ) { j=2; }
117 else if ( Z == 1 && intA == 2 ) { j=1; } << 110 else if ( Z == 2 && A == 3 ) { j=3; }
118 else if ( Z == 1 && intA == 3 ) { j=2; } << 111 else if ( Z == 2 && A == 4 ) { j=4; }
119 else if ( Z == 2 && intA == 3 ) { j=3; } <<
120 else if ( Z == 2 && intA == 4 ) { j=4; } <<
121 else {} 112 else {}
122 113
123 if ( i < 0 && j >= 0 ) { fRadiusEff = Ref <<
124 if ( i == 0 && j == 0 ) return sigmaTotal 114 if ( i == 0 && j == 0 ) return sigmaTotal * millibarn; // Pbar/Nbar + P
125 if ( i >= 0 && j >= 0 ) { fRadiusEff = Ref << 115 if ( i > 0 && j >= 0 ) { fRadiusEff = ReffTot[i][j]; } // Light anti-nuclei + Light nuclei
126 116
127 if ( j < 0 ) { 117 if ( j < 0 ) {
128 if ( i == 0 ) { fRadiusEff = 1.34 * << 118 if ( i == 0 ) { fRadiusEff = 1.34 * theG4Pow->powA(A, 0.23) // Anti-proton/Anti-neutron + Nucleus
129 + 1.35 / << 119 + 1.35 / theG4Pow->A13(A); }
130 else if ( i == 1 ) { fRadiusEff = 1.46 * << 120 else if ( i == 1 ) { fRadiusEff = 1.46 * theG4Pow->powA(A, 0.21) // Anti-deuteron + Nucleus
131 + 1.45 / << 121 + 1.45 / theG4Pow->A13(A); }
132 else if ( i == 2 ) { fRadiusEff = 1.40 * << 122 else if ( i == 2 ) { fRadiusEff = 1.40 * theG4Pow->powA(A, 0.21) // Anti-Tritium + Nucleus
133 + 1.63 / << 123 + 1.63 / theG4Pow->A13(A); }
134 else if ( i == 3 ) { fRadiusEff = 1.40 * << 124 else if ( i == 3 ) { fRadiusEff = 1.40 * theG4Pow->powA(A, 0.21) // Anti-He3 + Nucleus
135 + 1.63 / << 125 + 1.63 / theG4Pow->A13(A); }
136 else if ( i == 4 ) { fRadiusEff = 1.35 * << 126 else if ( i == 4 ) { fRadiusEff = 1.35 * theG4Pow->powA(A, 0.21) // Anti-Tritium + Nucleus
137 + 1.10 / << 127 + 1.10 / theG4Pow->A13(A); }
138 else if ( i < 0 ) { fRadiusEff = 1.35 * <<
139 + 1.10 / theG4P <<
140 else {} 128 else {}
141 } 129 }
142 130
143 G4double R2 = fRadiusEff*fRadiusEff; 131 G4double R2 = fRadiusEff*fRadiusEff;
144 G4double ApAt = std::abs(theParticle->GetBar 132 G4double ApAt = std::abs(theParticle->GetBaryonNumber()) * A;
145 133
146 G4double xsection = millibarn*2.*pi*R2*10.*G 134 G4double xsection = millibarn*2.*pi*R2*10.*G4Log(1.+(ApAt*sigmaTotal/(2.*pi*R2*10.))); //mb
147 fTotalXsc = xsection; 135 fTotalXsc = xsection;
148 136
149 return fTotalXsc; 137 return fTotalXsc;
150 } 138 }
151 139
152 140
153 ////////////////////////////////////////////// 141 /////////////////////////////////////////////////////////////////////////////
154 // 142 //
155 // Calculation of total CrossSection of Anti-N 143 // Calculation of total CrossSection of Anti-Nucleus - Nucleus
156 144
157 G4double G4ComponentAntiNuclNuclearXS::GetTota 145 G4double G4ComponentAntiNuclNuclearXS::GetTotalIsotopeCrossSection
158 (const G4ParticleDefinition* aParticle, G4doub 146 (const G4ParticleDefinition* aParticle, G4double kinEnergy, G4int Z, G4int A )
159 { 147 {
160 return GetTotalElementCrossSection(aParticle 148 return GetTotalElementCrossSection(aParticle, kinEnergy, Z, (G4double) A);
161 } 149 }
162 150
163 151
164 ////////////////////////////////////////////// 152 /////////////////////////////////////////////////////////////////////////////
165 // Calculation of inelastic CrossSection of An 153 // Calculation of inelastic CrossSection of Anti-Nucleus - Nucleus
166 154
167 G4double G4ComponentAntiNuclNuclearXS::GetInel 155 G4double G4ComponentAntiNuclNuclearXS::GetInelasticElementCrossSection
168 (const G4ParticleDefinition* aParticle, G4doub 156 (const G4ParticleDefinition* aParticle, G4double kinEnergy, G4int Z, G4double A)
169 { 157 {
170 if ( aParticle == nullptr ) { <<
171 G4ExceptionDescription ed; <<
172 ed << "anti-nucleus with nullptr particle <<
173 G4Exception( "G4ComponentAntiNuclNuclearXS <<
174 "antiNuclNuclearXS003", JustW <<
175 return 0.0; <<
176 } <<
177 <<
178 const G4ParticleDefinition* theParticle = aP 158 const G4ParticleDefinition* theParticle = aParticle;
179 G4double sigmaTotal = GetAntiHadronNucleon 159 G4double sigmaTotal = GetAntiHadronNucleonTotCrSc(theParticle,kinEnergy);
180 G4double sigmaElastic = GetAntiHadronNucleon 160 G4double sigmaElastic = GetAntiHadronNucleonElCrSc(theParticle,kinEnergy);
181 161
182 // calculation of sqr of radius NN-collision 162 // calculation of sqr of radius NN-collision
183 G4int i(-1), j(-1); 163 G4int i(-1), j(-1);
184 if ( theParticle == theAProton || 164 if ( theParticle == theAProton ||
185 theParticle == theANeutron ) { i=0; } 165 theParticle == theANeutron ) { i=0; }
186 else if ( theParticle == theADeuteron ) { i= 166 else if ( theParticle == theADeuteron ) { i=1; }
187 else if ( theParticle == theATriton ) { i= 167 else if ( theParticle == theATriton ) { i=2; }
188 else if ( theParticle == theAHe3 ) { i= 168 else if ( theParticle == theAHe3 ) { i=3; }
189 else if ( theParticle == theAAlpha ) { i= 169 else if ( theParticle == theAAlpha ) { i=4; }
190 else {}; 170 else {};
191 171
192 if ( i < 0 && ( ! theParticle->IsAntiHypern << 172 if ( i < 0 ) {
193 G4ExceptionDescription ed; 173 G4ExceptionDescription ed;
194 ed << "Unknown anti-nucleus : " << thePart << 174 ed << "Unknown anti-nucleus : "
>> 175 << ( theParticle != nullptr ? theParticle->GetParticleName() : "nullptr" ) << G4endl
195 << "Target (Z, A)=(" << Z << "," << A < 176 << "Target (Z, A)=(" << Z << "," << A << ")" << G4endl;
196 G4Exception( "G4ComponentAntiNuclNuclearXS 177 G4Exception( "G4ComponentAntiNuclNuclearXS::GetInelasticElementCrossSection",
197 "antiNuclNuclearXS004", JustW << 178 "antiNuclNuclearXS002", JustWarning, ed );
198 } 179 }
199 180
200 G4int intA = static_cast<G4int>( A ); << 181 if ( Z == 1 && A == 1 ) { j=0; }
201 << 182 else if ( Z == 1 && A == 2 ) { j=1; }
202 if ( Z == 1 && intA == 1 ) { j=0; } << 183 else if ( Z == 1 && A == 3 ) { j=2; }
203 else if ( Z == 1 && intA == 2 ) { j=1; } << 184 else if ( Z == 2 && A == 3 ) { j=3; }
204 else if ( Z == 1 && intA == 3 ) { j=2; } << 185 else if ( Z == 2 && A == 4 ) { j=4; }
205 else if ( Z == 2 && intA == 3 ) { j=3; } <<
206 else if ( Z == 2 && intA == 4 ) { j=4; } <<
207 else {} 186 else {}
208 187
209 if ( i < 0 && j >= 0 ) { fRadiusEff = Ref <<
210 if ( i == 0 && j == 0 ) return (sigmaTotal 188 if ( i == 0 && j == 0 ) return (sigmaTotal - sigmaElastic) * millibarn; // Pbar/Nbar + P
211 if ( i >= 0 && j >= 0 ) { fRadiusEff = Ref << 189 if ( i > 0 && j >= 0 ) { fRadiusEff = ReffInel[i][j]; } // Light anti-nuclei + Light nuclei
212 190
213 if ( j < 0) { 191 if ( j < 0) {
214 if ( i == 0 ) { fRadiusEff = 1.31*th << 192 if ( i == 0 ) { fRadiusEff = 1.31*theG4Pow->powA(A, 0.22) // Anti-proton/Anti-neutron + Nucleus
215 + 0.90/th << 193 + 0.90/theG4Pow->A13(A); }
216 else if ( i == 1 ) { fRadiusEff = 1.38*th << 194 else if ( i == 1 ) { fRadiusEff = 1.38*theG4Pow->powA(A, 0.21) // Anti-deuteron + Nucleus
217 + 1.55/th << 195 + 1.55/theG4Pow->A13(A); }
218 else if ( i == 2 ) { fRadiusEff = 1.34*th << 196 else if ( i == 2 ) { fRadiusEff = 1.34*theG4Pow->powA(A, 0.21) // Anti-Tritium + Nucleus
219 + 1.51/th << 197 + 1.51/theG4Pow->A13(A); }
220 else if ( i == 3 ) { fRadiusEff = 1.34*th << 198 else if ( i == 3 ) { fRadiusEff = 1.34*theG4Pow->powA(A, 0.21) // Anti-He3 + Nucleus
221 + 1.51/th << 199 + 1.51/theG4Pow->A13(A); }
222 else if ( i == 4 ) { fRadiusEff = 1.30*th << 200 else if ( i == 4 ) { fRadiusEff = 1.30*theG4Pow->powA(A, 0.21) // Anti-Tritium + Nucleus
223 + 1.05/th << 201 + 1.05/theG4Pow->A13(A); }
224 else if ( i < 0 ) { fRadiusEff = 1.30*th <<
225 + 1.05/th <<
226 else {} 202 else {}
227 } 203 }
228 204
229 G4double R2 = fRadiusEff*fRadiusEff; 205 G4double R2 = fRadiusEff*fRadiusEff;
230 G4double ApAt = std::abs(theParticle->GetBar 206 G4double ApAt = std::abs(theParticle->GetBaryonNumber()) * A;
231 207
232 G4double inelxsection = millibarn*pi*R2*10.* 208 G4double inelxsection = millibarn*pi*R2*10.*G4Log(1.+(ApAt*sigmaTotal/(pi*R2*10.))); //mb
233 fInelasticXsc = inelxsection; 209 fInelasticXsc = inelxsection;
234 210
235 return fInelasticXsc; 211 return fInelasticXsc;
236 } 212 }
237 213
238 214
239 ////////////////////////////////////////////// 215 /////////////////////////////////////////////////////////////////////////////
240 // 216 //
241 // Calculates Inelastic Anti-nucleus-Nucleus c 217 // Calculates Inelastic Anti-nucleus-Nucleus cross-section
242 218
243 G4double G4ComponentAntiNuclNuclearXS::GetInel 219 G4double G4ComponentAntiNuclNuclearXS::GetInelasticIsotopeCrossSection
244 (const G4ParticleDefinition* aParticle, G4doub 220 (const G4ParticleDefinition* aParticle, G4double kinEnergy, G4int Z, G4int A)
245 { 221 {
246 return GetInelasticElementCrossSection(aPart 222 return GetInelasticElementCrossSection(aParticle, kinEnergy, Z, (G4double) A);
247 } 223 }
248 224
249 225
250 ////////////////////////////////////////////// 226 /////////////////////////////////////////////////////////////////////////////
251 // 227 //
252 // Calculates elastic Anti-nucleus-Nucleus cro 228 // Calculates elastic Anti-nucleus-Nucleus cross-section as Total - Inelastic
253 229
254 G4double G4ComponentAntiNuclNuclearXS::GetElas 230 G4double G4ComponentAntiNuclNuclearXS::GetElasticElementCrossSection
255 (const G4ParticleDefinition* aParticle, G4doub 231 (const G4ParticleDefinition* aParticle, G4double kinEnergy, G4int Z, G4double A)
256 { 232 {
257 fElasticXsc = GetTotalElementCrossSection(aP 233 fElasticXsc = GetTotalElementCrossSection(aParticle, kinEnergy, Z, A)-
258 GetInelasticElementCrossSectio 234 GetInelasticElementCrossSection(aParticle, kinEnergy, Z, A);
259 if (fElasticXsc < 0.) fElasticXsc = 0.; 235 if (fElasticXsc < 0.) fElasticXsc = 0.;
260 return fElasticXsc; 236 return fElasticXsc;
261 } 237 }
262 238
263 239
264 ////////////////////////////////////////////// 240 /////////////////////////////////////////////////////////////////////////////
265 // 241 //
266 // Calculates elastic Anti-nucleus-Nucleus cro 242 // Calculates elastic Anti-nucleus-Nucleus cross-section
267 243
268 G4double G4ComponentAntiNuclNuclearXS::GetElas 244 G4double G4ComponentAntiNuclNuclearXS::GetElasticIsotopeCrossSection
269 (const G4ParticleDefinition* aParticle, G4doub 245 (const G4ParticleDefinition* aParticle, G4double kinEnergy, G4int Z, G4int A)
270 { 246 {
271 return GetElasticElementCrossSection(aPartic 247 return GetElasticElementCrossSection(aParticle, kinEnergy, Z, (G4double) A);
272 } 248 }
273 249
274 250
275 ////////////////////////////////////////////// 251 /////////////////////////////////////////////////////////////////////////////
276 // Calculation of Antihadron - hadron Total C 252 // Calculation of Antihadron - hadron Total Cross-section
277 253
278 G4double G4ComponentAntiNuclNuclearXS::GetAnti 254 G4double G4ComponentAntiNuclNuclearXS::GetAntiHadronNucleonTotCrSc
279 (const G4ParticleDefinition* aParticle, G4doub 255 (const G4ParticleDefinition* aParticle, G4double kinEnergy)
280 { 256 {
281 G4double xsection, Pmass, Energy, momentum; 257 G4double xsection, Pmass, Energy, momentum;
282 const G4ParticleDefinition* theParticle = aP 258 const G4ParticleDefinition* theParticle = aParticle;
283 Pmass=theParticle->GetPDGMass(); 259 Pmass=theParticle->GetPDGMass();
284 Energy=Pmass+kinEnergy; 260 Energy=Pmass+kinEnergy;
285 momentum=std::sqrt(Energy*Energy-Pmass*Pmass 261 momentum=std::sqrt(Energy*Energy-Pmass*Pmass)/std::abs(theParticle->GetBaryonNumber());
286 G4double Plab = momentum / GeV; 262 G4double Plab = momentum / GeV;
287 263
288 G4double B, SigAss; 264 G4double B, SigAss;
289 G4double C, d1, d2, d3; 265 G4double C, d1, d2, d3;
290 Elab = std::sqrt(Mn*Mn + Plab*Plab); / 266 Elab = std::sqrt(Mn*Mn + Plab*Plab); // GeV
291 S = 2.*Mn*Mn + 2. *Mn*Elab; / 267 S = 2.*Mn*Mn + 2. *Mn*Elab; // GeV^2
292 SqrtS = std::sqrt(S); / 268 SqrtS = std::sqrt(S); // GeV
293 B = b0+b2*G4Log(SqrtS/SqrtS0)*G4Log(S 269 B = b0+b2*G4Log(SqrtS/SqrtS0)*G4Log(SqrtS/SqrtS0); //GeV^(-2)
294 SigAss = 36.04 +0.304*G4Log(S/S0)*G4Log(S/ 270 SigAss = 36.04 +0.304*G4Log(S/S0)*G4Log(S/S0); //mb
295 R0 = std::sqrt(0.40874044*SigAss - B); 271 R0 = std::sqrt(0.40874044*SigAss - B); //GeV^(-2)
296 C = 13.55; 272 C = 13.55;
297 d1 = -4.47; 273 d1 = -4.47;
298 d2 = 12.38; 274 d2 = 12.38;
299 d3 = -12.43; 275 d3 = -12.43;
300 276
301 xsection = SigAss * ( 1 + 1./(std::sqrt(S-4. 277 xsection = SigAss * ( 1 + 1./(std::sqrt(S-4.*Mn*Mn)) / (theG4Pow->powN(R0, 3))
302 * C * ( 1 + d1/SqrtS + 278 * C * ( 1 + d1/SqrtS + d2/(theG4Pow->powN(SqrtS, 2))
303 + d3/(theG4Pow 279 + d3/(theG4Pow->powN(SqrtS, 3)) ) );
304 280
305 //xsection *= millibarn; 281 //xsection *= millibarn;
306 fAntiHadronNucleonTotXsc = xsection; 282 fAntiHadronNucleonTotXsc = xsection;
307 283
308 return fAntiHadronNucleonTotXsc; 284 return fAntiHadronNucleonTotXsc;
309 } 285 }
310 286
311 287
312 // /////////////////////////////////////////// 288 // //////////////////////////////////////////////////////////////////////////
313 // Calculation of Antihadron - hadron Elastic 289 // Calculation of Antihadron - hadron Elastic Cross-section
314 290
315 G4double G4ComponentAntiNuclNuclearXS :: 291 G4double G4ComponentAntiNuclNuclearXS ::
316 GetAntiHadronNucleonElCrSc(const G4ParticleDef 292 GetAntiHadronNucleonElCrSc(const G4ParticleDefinition* aParticle, G4double kinEnergy)
317 { 293 {
318 G4double xsection; 294 G4double xsection;
319 G4double SigAss; 295 G4double SigAss;
320 G4double C, d1, d2, d3; 296 G4double C, d1, d2, d3;
321 GetAntiHadronNucleonTotCrSc(aParticle,kinEne 297 GetAntiHadronNucleonTotCrSc(aParticle,kinEnergy);
322 SigAss = 4.5 + 0.101*G4Log(S/S0)*G4Log(S/S 298 SigAss = 4.5 + 0.101*G4Log(S/S0)*G4Log(S/S0); //mb
323 C = 59.27; 299 C = 59.27;
324 d1 = -6.95; 300 d1 = -6.95;
325 d2 = 23.54; 301 d2 = 23.54;
326 d3 = -25.34; 302 d3 = -25.34;
327 303
328 xsection = SigAss * ( 1 + 1. / (std::sqrt(S- 304 xsection = SigAss * ( 1 + 1. / (std::sqrt(S-4.*Mn*Mn)) / (theG4Pow->powN(R0, 3))
329 * C * ( 1 + d1/SqrtS + 305 * C * ( 1 + d1/SqrtS + d2/(theG4Pow->powN(SqrtS, 2))
330 + d3/(theG4Pow 306 + d3/(theG4Pow->powN(SqrtS, 3)) ) );
331 307
332 //xsection *= millibarn; 308 //xsection *= millibarn;
333 fAntiHadronNucleonElXsc = xsection; 309 fAntiHadronNucleonElXsc = xsection;
334 310
335 return fAntiHadronNucleonElXsc; 311 return fAntiHadronNucleonElXsc;
336 } 312 }
337 313
338 314
339 ////////////////////////////////////////////// 315 /////////////////////////////////////////////////////////////////////////////
340 316
341 void G4ComponentAntiNuclNuclearXS::CrossSectio 317 void G4ComponentAntiNuclNuclearXS::CrossSectionDescription(std::ostream& outFile) const
342 { 318 {
343 outFile << "The G4ComponentAntiNuclNuclearXS 319 outFile << "The G4ComponentAntiNuclNuclearXS calculates total,\n"
344 << "inelastic, elastic cross section 320 << "inelastic, elastic cross sections of anti-nucleons and light \n"
345 << "anti-nucleus interactions with n 321 << "anti-nucleus interactions with nuclei using Glauber's approach.\n"
346 << "It uses parametrizations of anti 322 << "It uses parametrizations of antiproton-proton total and elastic \n"
347 << "cross sections and Wood-Saxon di 323 << "cross sections and Wood-Saxon distribution of nuclear density.\n"
348 << "See details in Phys.Lett. B705 ( 324 << "See details in Phys.Lett. B705 (2011) 235. \n";
349 } 325 }
350 326
351 327