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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" <<
45 44
46 << 45 ///////////////////////////////////////////////////////////////////////////////
47 ////////////////////////////////////////////// <<
48 46
49 G4ComponentAntiNuclNuclearXS::G4ComponentAntiN 47 G4ComponentAntiNuclNuclearXS::G4ComponentAntiNuclNuclearXS()
50 : G4VComponentCrossSection("AntiAGlauber"), 48 : G4VComponentCrossSection("AntiAGlauber"),
51 fRadiusEff(0.0), << 49 // fUpperLimit(10000*GeV), fLowerLimit(10*MeV),
>> 50 fRadiusEff(0.0), fRadiusNN2(0.0),
52 fTotalXsc(0.0), fElasticXsc(0.0), fInelastic 51 fTotalXsc(0.0), fElasticXsc(0.0), fInelasticXsc(0.0),
53 fAntiHadronNucleonTotXsc(0.0), fAntiHadronNu 52 fAntiHadronNucleonTotXsc(0.0), fAntiHadronNucleonElXsc(0.0),
54 Elab(0.0), S(0.0), SqrtS(0) 53 Elab(0.0), S(0.0), SqrtS(0)
55 { 54 {
56 theAProton = G4AntiProton::AntiProton(); << 55 theAProton = G4AntiProton::AntiProton();
57 theANeutron = G4AntiNeutron::AntiNeutron(); << 56 theANeutron = G4AntiNeutron::AntiNeutron();
58 theADeuteron = G4AntiDeuteron::AntiDeuteron( << 57 theADeuteron = G4AntiDeuteron::AntiDeuteron();
59 theATriton = G4AntiTriton::AntiTriton(); << 58 theATriton = G4AntiTriton::AntiTriton();
60 theAAlpha = G4AntiAlpha::AntiAlpha(); << 59 theAAlpha = G4AntiAlpha::AntiAlpha();
61 theAHe3 = G4AntiHe3::AntiHe3(); << 60 theAHe3 = G4AntiHe3::AntiHe3();
62 Mn = 0.93827231; // GeV << 61
63 b0 = 11.92; // GeV^(-2) << 62 Mn = 0.93827231; // GeV
64 b2 = 0.3036; // GeV^(-2) << 63 b0 = 11.92; // GeV^(-2)
65 SqrtS0 = 20.74; // GeV << 64 b2 = 0.3036; // GeV^(-2)
66 S0 = 33.0625; // GeV^2 << 65 SqrtS0 = 20.74; // GeV
67 R0 = 1.0; // default va << 66 S0 = 33.0625; // GeV^2
>> 67 R0 = 1.0; // default value (V.Ivanchenko)
68 } 68 }
69 69
70 << 70 ///////////////////////////////////////////////////////////////////////////////////////
71 ////////////////////////////////////////////// << 71 //
>> 72 //
72 73
73 G4ComponentAntiNuclNuclearXS::~G4ComponentAnti 74 G4ComponentAntiNuclNuclearXS::~G4ComponentAntiNuclNuclearXS()
74 { 75 {
75 } 76 }
76 77
>> 78 ////////////////////////////////////////////////////////////////////////////////
77 79
78 ////////////////////////////////////////////// << 80
>> 81
>> 82 ////////////////////////////////////////////////////////////////////////////////
79 // 83 //
80 // Calculation of total CrossSection of Anti-N 84 // Calculation of total CrossSection of Anti-Nucleus - Nucleus
81 85
>> 86
82 G4double G4ComponentAntiNuclNuclearXS::GetTota 87 G4double G4ComponentAntiNuclNuclearXS::GetTotalElementCrossSection
83 (const G4ParticleDefinition* aParticle, G4doub 88 (const G4ParticleDefinition* aParticle, G4double kinEnergy, G4int Z, G4double A)
84 { 89 {
85 if ( aParticle == nullptr ) { << 90 G4double xsection, sigmaTotal, sigmaElastic;
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 <<
94 G4double sigmaTotal = GetAntiHadronNucleonTo <<
95 91
96 // calculation of squared radius of NN-coll << 92 const G4ParticleDefinition* theParticle = aParticle;
97 G4int i(-1), j(-1); << 93
98 if ( theParticle == theAProton || << 94 sigmaTotal = GetAntiHadronNucleonTotCrSc(theParticle,kinEnergy);
99 theParticle == theANeutron ) { i=0; } << 95 sigmaElastic = GetAntiHadronNucleonElCrSc(theParticle,kinEnergy);
100 else if ( theParticle == theADeuteron ) { i= <<
101 else if ( theParticle == theATriton ) { i= <<
102 else if ( theParticle == theAHe3 ) { i= <<
103 else if ( theParticle == theAAlpha ) { i= <<
104 else {}; <<
105 <<
106 if ( i < 0 && ( ! theParticle->IsAntiHypern <<
107 G4ExceptionDescription ed; <<
108 ed << "Unknown anti-nucleus : " << thePart <<
109 << "Target (Z, A)=(" << Z << "," << A < <<
110 G4Exception( "G4ComponentAntiNuclNuclearXS <<
111 "antiNuclNuclearXS002", JustW <<
112 } <<
113 96
114 G4int intA = static_cast<G4int>( A ); << 97 // calculation of squared radius of NN-collision
>> 98 fRadiusNN2=sigmaTotal*sigmaTotal*0.1/(8.*sigmaElastic*pi) ; //fm^2
115 99
116 if ( Z == 1 && intA == 1 ) { j=0; } << 100 // calculation of effective nuclear radius for Pbar and Nbar interactions (can be changed)
117 else if ( Z == 1 && intA == 2 ) { j=1; } << 101
118 else if ( Z == 1 && intA == 3 ) { j=2; } << 102 //A.R. 29-Jan-2013 : use antiprotons/antineutrons as the default case,
119 else if ( Z == 2 && intA == 3 ) { j=3; } << 103 // to be used for instance, as first approximation
120 else if ( Z == 2 && intA == 4 ) { j=4; } << 104 // without validation, for anti-hyperons.
121 else {} << 105 //if ( (theParticle == theAProton) || (theParticle == theANeutron) ) {
122 << 106 if(A==1)
123 if ( i < 0 && j >= 0 ) { fRadiusEff = Ref << 107 { fTotalXsc = sigmaTotal * millibarn;
124 if ( i == 0 && j == 0 ) return sigmaTotal << 108 return fTotalXsc; }
125 if ( i >= 0 && j >= 0 ) { fRadiusEff = Ref << 109
126 << 110 fRadiusEff = 1.34*std::pow(A,0.23)+1.35/std::pow(A,1./3.); //fm
127 if ( j < 0 ) { << 111
128 if ( i == 0 ) { fRadiusEff = 1.34 * << 112 if( (Z==1) && (A==2) ) fRadiusEff = 3.800; //fm
129 + 1.35 / << 113 if( (Z==1) && (A==3) ) fRadiusEff = 3.300;
130 else if ( i == 1 ) { fRadiusEff = 1.46 * << 114 if( (Z==2) && (A==3) ) fRadiusEff = 3.300;
131 + 1.45 / << 115 if( (Z==2) && (A==4) ) fRadiusEff = 2.376;
132 else if ( i == 2 ) { fRadiusEff = 1.40 * << 116 //}
133 + 1.63 / << 117
134 else if ( i == 3 ) { fRadiusEff = 1.40 * << 118 //calculation of effective nuclear radius for AntiDeuteron interaction (can be changed)
135 + 1.63 / << 119 if (theParticle == theADeuteron)
136 else if ( i == 4 ) { fRadiusEff = 1.35 * << 120 { fRadiusEff = 1.46 * std::pow(A,0.21) + 1.45 / std::pow(A,1./3.);
137 + 1.10 / << 121
138 else if ( i < 0 ) { fRadiusEff = 1.35 * << 122 if( (Z==1) && (A==2) ) fRadiusEff = 3.238; //fm
139 + 1.10 / theG4P << 123 if( (Z==1) && (A==3) ) fRadiusEff = 3.144;
140 else {} << 124 if( (Z==2) && (A==3) ) fRadiusEff = 3.144;
>> 125 if( (Z==2) && (A==4) ) fRadiusEff = 2.544;
>> 126 }
>> 127 // calculation of effective nuclear radius for AntiHe3 interaction (can be changed)
>> 128
>> 129 if( (theParticle ==theAHe3) || (theParticle ==theATriton) )
>> 130 { fRadiusEff = 1.40* std::pow(A,0.21)+1.63/std::pow(A,1./3.);
>> 131
>> 132 if( (Z==1) && (A==2) ) fRadiusEff = 3.144; //fm
>> 133 if( (Z==1) && (A==3) ) fRadiusEff = 3.075;
>> 134 if( (Z==2) && (A==3) ) fRadiusEff = 3.075;
>> 135 if( (Z==2) && (A==4) ) fRadiusEff = 2.589;
141 } 136 }
142 137
143 G4double R2 = fRadiusEff*fRadiusEff; << 138 //calculation of effective nuclear radius for AntiAlpha interaction (can be changed)
144 G4double ApAt = std::abs(theParticle->GetBar << 139
>> 140 if (theParticle == theAAlpha)
>> 141 {
>> 142 fRadiusEff = 1.35* std::pow(A,0.21)+1.1/std::pow(A,1./3.);
>> 143
>> 144 if( (Z==1) && (A==2) ) fRadiusEff = 2.544; //fm
>> 145 if( (Z==1) && (A==3) ) fRadiusEff = 2.589;
>> 146 if( (Z==2) && (A==3) ) fRadiusEff = 2.589;
>> 147 if( (Z==2) && (A==4) ) fRadiusEff = 2.241;
>> 148
>> 149 }
145 150
146 G4double xsection = millibarn*2.*pi*R2*10.*G << 151 G4double R2 = fRadiusEff*fRadiusEff;
147 fTotalXsc = xsection; << 152 G4double REf2 = R2+fRadiusNN2;
>> 153 G4double ApAt = std::abs(theParticle->GetBaryonNumber()) * A;
>> 154
>> 155 xsection = 2*pi*REf2*10.*std::log(1+(ApAt*sigmaTotal/(2*pi*REf2*10.))); //mb
>> 156 xsection =xsection *millibarn;
>> 157 fTotalXsc = xsection;
148 158
149 return fTotalXsc; 159 return fTotalXsc;
150 } 160 }
151 161
152 162
153 ////////////////////////////////////////////// << 163 ////////////////////////////////////////////////////////////////////////////////
154 // 164 //
155 // Calculation of total CrossSection of Anti-N 165 // Calculation of total CrossSection of Anti-Nucleus - Nucleus
156 << 166 //////////////////////////////////////////////////////////////////////////////
157 G4double G4ComponentAntiNuclNuclearXS::GetTota 167 G4double G4ComponentAntiNuclNuclearXS::GetTotalIsotopeCrossSection
158 (const G4ParticleDefinition* aParticle, G4doub 168 (const G4ParticleDefinition* aParticle, G4double kinEnergy, G4int Z, G4int A )
159 { << 169 { return GetTotalElementCrossSection(aParticle, kinEnergy, Z, (G4double) A); }
160 return GetTotalElementCrossSection(aParticle <<
161 } <<
162 <<
163 170
164 ////////////////////////////////////////////// << 171 ////////////////////////////////////////////////////////////////
165 // Calculation of inelastic CrossSection of An 172 // Calculation of inelastic CrossSection of Anti-Nucleus - Nucleus
>> 173 ////////////////////////////////////////////////////////////////
166 174
167 G4double G4ComponentAntiNuclNuclearXS::GetInel 175 G4double G4ComponentAntiNuclNuclearXS::GetInelasticElementCrossSection
168 (const G4ParticleDefinition* aParticle, G4doub 176 (const G4ParticleDefinition* aParticle, G4double kinEnergy, G4int Z, G4double A)
169 { 177 {
170 if ( aParticle == nullptr ) { << 178 G4double inelxsection, sigmaTotal, sigmaElastic;
171 G4ExceptionDescription ed; << 179
172 ed << "anti-nucleus with nullptr particle <<
173 G4Exception( "G4ComponentAntiNuclNuclearXS <<
174 "antiNuclNuclearXS003", JustW <<
175 return 0.0; <<
176 } <<
177 <<
178 const G4ParticleDefinition* theParticle = aP 180 const G4ParticleDefinition* theParticle = aParticle;
179 G4double sigmaTotal = GetAntiHadronNucleon << 181
180 G4double sigmaElastic = GetAntiHadronNucleon << 182 sigmaTotal = GetAntiHadronNucleonTotCrSc(theParticle,kinEnergy);
>> 183 sigmaElastic = GetAntiHadronNucleonElCrSc(theParticle,kinEnergy);
181 184
182 // calculation of sqr of radius NN-collision << 185 // calculation of sqr of radius NN-collision
183 G4int i(-1), j(-1); << 186 fRadiusNN2=sigmaTotal*sigmaTotal*0.1/(8.*sigmaElastic*pi); // fm^2
184 if ( theParticle == theAProton || <<
185 theParticle == theANeutron ) { i=0; } <<
186 else if ( theParticle == theADeuteron ) { i= <<
187 else if ( theParticle == theATriton ) { i= <<
188 else if ( theParticle == theAHe3 ) { i= <<
189 else if ( theParticle == theAAlpha ) { i= <<
190 else {}; <<
191 <<
192 if ( i < 0 && ( ! theParticle->IsAntiHypern <<
193 G4ExceptionDescription ed; <<
194 ed << "Unknown anti-nucleus : " << thePart <<
195 << "Target (Z, A)=(" << Z << "," << A < <<
196 G4Exception( "G4ComponentAntiNuclNuclearXS <<
197 "antiNuclNuclearXS004", JustW <<
198 } <<
199 187
200 G4int intA = static_cast<G4int>( A ); <<
201 188
202 if ( Z == 1 && intA == 1 ) { j=0; } << 189 // calculation of effective nuclear radius for Pbar and Nbar interaction (can be changed)
203 else if ( Z == 1 && intA == 2 ) { j=1; } <<
204 else if ( Z == 1 && intA == 3 ) { j=2; } <<
205 else if ( Z == 2 && intA == 3 ) { j=3; } <<
206 else if ( Z == 2 && intA == 4 ) { j=4; } <<
207 else {} <<
208 <<
209 if ( i < 0 && j >= 0 ) { fRadiusEff = Ref <<
210 if ( i == 0 && j == 0 ) return (sigmaTotal <<
211 if ( i >= 0 && j >= 0 ) { fRadiusEff = Ref <<
212 <<
213 if ( j < 0) { <<
214 if ( i == 0 ) { fRadiusEff = 1.31*th <<
215 + 0.90/th <<
216 else if ( i == 1 ) { fRadiusEff = 1.38*th <<
217 + 1.55/th <<
218 else if ( i == 2 ) { fRadiusEff = 1.34*th <<
219 + 1.51/th <<
220 else if ( i == 3 ) { fRadiusEff = 1.34*th <<
221 + 1.51/th <<
222 else if ( i == 4 ) { fRadiusEff = 1.30*th <<
223 + 1.05/th <<
224 else if ( i < 0 ) { fRadiusEff = 1.30*th <<
225 + 1.05/th <<
226 else {} <<
227 } <<
228 190
229 G4double R2 = fRadiusEff*fRadiusEff; << 191 //A.R. 29-Jan-2013 : use antiprotons/antineutrons as the default case,
230 G4double ApAt = std::abs(theParticle->GetBar << 192 // to be used for instance, as first approximation
>> 193 // without validation, for anti-hyperons.
>> 194 //if ( (theParticle == theAProton) || (theParticle == theANeutron) ) {
>> 195 if (A==1)
>> 196 { fInelasticXsc = (sigmaTotal - sigmaElastic) * millibarn;
>> 197 return fInelasticXsc;
>> 198 }
>> 199 fRadiusEff = 1.31*std::pow(A, 0.22)+0.9/std::pow(A, 1./3.); //fm
>> 200
>> 201 if( (Z==1) && (A==2) ) fRadiusEff = 3.582; //fm
>> 202 if( (Z==1) && (A==3) ) fRadiusEff = 3.105;
>> 203 if( (Z==2) && (A==3) ) fRadiusEff = 3.105;
>> 204 if( (Z==2) && (A==4) ) fRadiusEff = 2.209;
>> 205 //}
231 206
232 G4double inelxsection = millibarn*pi*R2*10.* << 207 //calculation of effective nuclear radius for AntiDeuteron interaction (can be changed)
233 fInelasticXsc = inelxsection; <<
234 208
235 return fInelasticXsc; << 209 if (theParticle ==theADeuteron)
236 } << 210 {
>> 211 fRadiusEff = 1.38*std::pow(A, 0.21)+1.55/std::pow(A, 1./3.);
>> 212
>> 213 if( (Z==1) && (A==2) ) fRadiusEff = 3.169; //fm
>> 214 if( (Z==1) && (A==3) ) fRadiusEff = 3.066;
>> 215 if( (Z==2) && (A==3) ) fRadiusEff = 3.066;
>> 216 if( (Z==2) && (A==4) ) fRadiusEff = 2.498;
>> 217 }
>> 218
>> 219 //calculation of effective nuclear radius for AntiHe3 interaction (can be changed)
>> 220
>> 221 if( (theParticle ==theAHe3) || (theParticle ==theATriton) )
>> 222 {
>> 223 fRadiusEff = 1.34 * std::pow(A, 0.21)+1.51/std::pow(A, 1./3.);
>> 224
>> 225 if( (Z==1) && (A==2) ) fRadiusEff = 3.066; //fm
>> 226 if( (Z==1) && (A==3) ) fRadiusEff = 2.973;
>> 227 if( (Z==2) && (A==3) ) fRadiusEff = 2.973;
>> 228 if( (Z==2) && (A==4) ) fRadiusEff = 2.508;
>> 229
>> 230 }
>> 231
>> 232 //calculation of effective nuclear radius for AntiAlpha interaction (can be changed)
237 233
>> 234 if (theParticle == theAAlpha)
>> 235 {
>> 236 fRadiusEff = 1.3*std::pow(A, 0.21)+1.05/std::pow(A, 1./3.);
>> 237
>> 238 if( (Z==1) && (A==2) ) fRadiusEff = 2.498; //fm
>> 239 if( (Z==1) && (A==3) ) fRadiusEff = 2.508;
>> 240 if( (Z==2) && (A==3) ) fRadiusEff = 2.508;
>> 241 if( (Z==2) && (A==4) ) fRadiusEff = 2.158;
>> 242 }
>> 243 G4double R2 = fRadiusEff*fRadiusEff;
>> 244 G4double REf2 = R2+fRadiusNN2;
>> 245 G4double ApAt= std::abs(theParticle->GetBaryonNumber()) * A;
>> 246
>> 247 inelxsection = pi*REf2 *10* std::log(1+(ApAt*sigmaTotal/(pi*REf2*10.))); //mb
>> 248 inelxsection = inelxsection * millibarn;
>> 249 fInelasticXsc = inelxsection;
>> 250 return fInelasticXsc;
>> 251 }
238 252
239 ////////////////////////////////////////////// << 253 ///////////////////////////////////////////////////////////////////////////////
240 // 254 //
241 // Calculates Inelastic Anti-nucleus-Nucleus c 255 // Calculates Inelastic Anti-nucleus-Nucleus cross-section
242 << 256 //
243 G4double G4ComponentAntiNuclNuclearXS::GetInel 257 G4double G4ComponentAntiNuclNuclearXS::GetInelasticIsotopeCrossSection
244 (const G4ParticleDefinition* aParticle, G4doub 258 (const G4ParticleDefinition* aParticle, G4double kinEnergy, G4int Z, G4int A)
245 { << 259 {return GetInelasticElementCrossSection(aParticle, kinEnergy, Z, (G4double) A); }
246 return GetInelasticElementCrossSection(aPart << 260
247 } <<
248 261
249 262
250 ////////////////////////////////////////////// << 263 ///////////////////////////////////////////////////////////////////////////////
251 // 264 //
252 // Calculates elastic Anti-nucleus-Nucleus cro 265 // Calculates elastic Anti-nucleus-Nucleus cross-section as Total - Inelastic
253 << 266 //
254 G4double G4ComponentAntiNuclNuclearXS::GetElas 267 G4double G4ComponentAntiNuclNuclearXS::GetElasticElementCrossSection
255 (const G4ParticleDefinition* aParticle, G4doub 268 (const G4ParticleDefinition* aParticle, G4double kinEnergy, G4int Z, G4double A)
256 { 269 {
257 fElasticXsc = GetTotalElementCrossSection(aP << 270 fElasticXsc = GetTotalElementCrossSection(aParticle, kinEnergy, Z, A)-
258 GetInelasticElementCrossSectio << 271 GetInelasticElementCrossSection(aParticle, kinEnergy, Z, A);
259 if (fElasticXsc < 0.) fElasticXsc = 0.; << 272
260 return fElasticXsc; << 273 if (fElasticXsc < 0.) fElasticXsc = 0.;
261 } <<
262 274
>> 275 return fElasticXsc;
>> 276 }
263 277
264 ////////////////////////////////////////////// << 278 ///////////////////////////////////////////////////////////////////////////////
265 // 279 //
266 // Calculates elastic Anti-nucleus-Nucleus cro 280 // Calculates elastic Anti-nucleus-Nucleus cross-section
267 << 281 //
268 G4double G4ComponentAntiNuclNuclearXS::GetElas 282 G4double G4ComponentAntiNuclNuclearXS::GetElasticIsotopeCrossSection
269 (const G4ParticleDefinition* aParticle, G4doub 283 (const G4ParticleDefinition* aParticle, G4double kinEnergy, G4int Z, G4int A)
270 { << 284 { return GetElasticElementCrossSection(aParticle, kinEnergy, Z, (G4double) A); }
271 return GetElasticElementCrossSection(aPartic <<
272 } <<
273 285
274 286
275 ////////////////////////////////////////////// << 287 ///////////////////////////////////////////////////////////////////////////////////
276 // Calculation of Antihadron - hadron Total C 288 // Calculation of Antihadron - hadron Total Cross-section
277 289
278 G4double G4ComponentAntiNuclNuclearXS::GetAnti 290 G4double G4ComponentAntiNuclNuclearXS::GetAntiHadronNucleonTotCrSc
279 (const G4ParticleDefinition* aParticle, G4doub 291 (const G4ParticleDefinition* aParticle, G4double kinEnergy)
280 { 292 {
281 G4double xsection, Pmass, Energy, momentum; 293 G4double xsection, Pmass, Energy, momentum;
282 const G4ParticleDefinition* theParticle = aP 294 const G4ParticleDefinition* theParticle = aParticle;
283 Pmass=theParticle->GetPDGMass(); 295 Pmass=theParticle->GetPDGMass();
284 Energy=Pmass+kinEnergy; 296 Energy=Pmass+kinEnergy;
285 momentum=std::sqrt(Energy*Energy-Pmass*Pmass 297 momentum=std::sqrt(Energy*Energy-Pmass*Pmass)/std::abs(theParticle->GetBaryonNumber());
286 G4double Plab = momentum / GeV; 298 G4double Plab = momentum / GeV;
287 299
288 G4double B, SigAss; << 300 G4double B, SigAss;
289 G4double C, d1, d2, d3; << 301 G4double C, d1, d2, d3 ;
290 Elab = std::sqrt(Mn*Mn + Plab*Plab); / <<
291 S = 2.*Mn*Mn + 2. *Mn*Elab; / <<
292 SqrtS = std::sqrt(S); / <<
293 B = b0+b2*G4Log(SqrtS/SqrtS0)*G4Log(S <<
294 SigAss = 36.04 +0.304*G4Log(S/S0)*G4Log(S/ <<
295 R0 = std::sqrt(0.40874044*SigAss - B); <<
296 C = 13.55; <<
297 d1 = -4.47; <<
298 d2 = 12.38; <<
299 d3 = -12.43; <<
300 <<
301 xsection = SigAss * ( 1 + 1./(std::sqrt(S-4. <<
302 * C * ( 1 + d1/SqrtS + <<
303 + d3/(theG4Pow <<
304 302
305 //xsection *= millibarn; << 303 Elab = std::sqrt(Mn*Mn + Plab*Plab); // GeV
306 fAntiHadronNucleonTotXsc = xsection; << 304 S = 2.*Mn*Mn + 2. *Mn*Elab; // GeV^2
>> 305 SqrtS = std::sqrt(S); // GeV
>> 306
>> 307 B = b0+b2*std::log(SqrtS/SqrtS0)*std::log(SqrtS/SqrtS0); //GeV^(-2)
>> 308 SigAss = 36.04 +0.304*std::log(S/S0)*std::log(S/S0); //mb
>> 309 R0 = std::sqrt(0.40874044*SigAss - B); //GeV^(-2)
>> 310
>> 311 C = 13.55;
>> 312 d1 = -4.47;
>> 313 d2 = 12.38;
>> 314 d3 = -12.43;
>> 315 xsection = SigAss*(1 + 1./(std::sqrt(S-4.*Mn*Mn)) / (std::pow(R0, 3.))
>> 316 *C* (1+d1/SqrtS+d2/(std::pow(SqrtS,2.))+d3/(std::pow(SqrtS,3.)) ));
>> 317
>> 318 // xsection *= millibarn;
307 319
>> 320 fAntiHadronNucleonTotXsc = xsection;
308 return fAntiHadronNucleonTotXsc; 321 return fAntiHadronNucleonTotXsc;
309 } 322 }
310 323
311 324
312 // /////////////////////////////////////////// << 325 //
>> 326 // /////////////////////////////////////////////////////////////////////////////////
313 // Calculation of Antihadron - hadron Elastic 327 // Calculation of Antihadron - hadron Elastic Cross-section
314 328
315 G4double G4ComponentAntiNuclNuclearXS :: 329 G4double G4ComponentAntiNuclNuclearXS ::
316 GetAntiHadronNucleonElCrSc(const G4ParticleDef 330 GetAntiHadronNucleonElCrSc(const G4ParticleDefinition* aParticle, G4double kinEnergy)
317 { 331 {
318 G4double xsection; << 332 G4double xsection;
319 G4double SigAss; <<
320 G4double C, d1, d2, d3; <<
321 GetAntiHadronNucleonTotCrSc(aParticle,kinEne <<
322 SigAss = 4.5 + 0.101*G4Log(S/S0)*G4Log(S/S <<
323 C = 59.27; <<
324 d1 = -6.95; <<
325 d2 = 23.54; <<
326 d3 = -25.34; <<
327 <<
328 xsection = SigAss * ( 1 + 1. / (std::sqrt(S- <<
329 * C * ( 1 + d1/SqrtS + <<
330 + d3/(theG4Pow <<
331 333
332 //xsection *= millibarn; << 334 G4double SigAss;
333 fAntiHadronNucleonElXsc = xsection; << 335 G4double C, d1, d2, d3 ;
334 336
335 return fAntiHadronNucleonElXsc; << 337 GetAntiHadronNucleonTotCrSc(aParticle,kinEnergy);
336 } << 338
>> 339 SigAss = 4.5 + 0.101*std::log(S/S0)*std::log(S/S0); //mb
>> 340
>> 341 C = 59.27;
>> 342 d1 = -6.95;
>> 343 d2 = 23.54;
>> 344 d3 = -25.34;
>> 345
>> 346 xsection = SigAss* (1 + 1. / (std::sqrt(S-4.*Mn*Mn)) / (std::pow(R0, 3.))
>> 347 *C* ( 1+d1/SqrtS+d2/(std::pow(SqrtS,2.))+d3/(std::pow(SqrtS,3.)) ));
337 348
>> 349 // xsection *= millibarn;
338 350
339 ////////////////////////////////////////////// << 351 fAntiHadronNucleonElXsc = xsection;
>> 352 return fAntiHadronNucleonElXsc;
>> 353 }
340 354
341 void G4ComponentAntiNuclNuclearXS::CrossSectio 355 void G4ComponentAntiNuclNuclearXS::CrossSectionDescription(std::ostream& outFile) const
342 { 356 {
343 outFile << "The G4ComponentAntiNuclNuclearXS 357 outFile << "The G4ComponentAntiNuclNuclearXS calculates total,\n"
344 << "inelastic, elastic cross section 358 << "inelastic, elastic cross sections of anti-nucleons and light \n"
345 << "anti-nucleus interactions with n << 359 << "anti-nucleus interactions with nuclei using Glauber's approach.\n"
346 << "It uses parametrizations of anti 360 << "It uses parametrizations of antiproton-proton total and elastic \n"
347 << "cross sections and Wood-Saxon di << 361 << "cross sections and Wood-Saxon distribution of nuclear density.\n"
>> 362 << "The lower limit is 10 MeV, the upper limit is 10 TeV. \n"
348 << "See details in Phys.Lett. B705 ( 363 << "See details in Phys.Lett. B705 (2011) 235. \n";
349 } 364 }
350 <<
351 365