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25 // 25 //
26 // 24.11.08 V. Grichine - first implementation 26 // 24.11.08 V. Grichine - first implementation
27 // 27 //
28 // 04.09.18 V. Ivantchenko Major revision of i 28 // 04.09.18 V. Ivantchenko Major revision of interfaces and implementation
29 // 27.05.19 V. Ivantchenko Removed obsolete me 29 // 27.05.19 V. Ivantchenko Removed obsolete methods and members
30 30
31 #include "G4ComponentGGNuclNuclXsc.hh" 31 #include "G4ComponentGGNuclNuclXsc.hh"
32 32
33 #include "G4PhysicalConstants.hh" 33 #include "G4PhysicalConstants.hh"
34 #include "G4SystemOfUnits.hh" 34 #include "G4SystemOfUnits.hh"
35 #include "G4NucleiProperties.hh" 35 #include "G4NucleiProperties.hh"
36 #include "G4ParticleDefinition.hh" 36 #include "G4ParticleDefinition.hh"
37 #include "G4HadronNucleonXsc.hh" 37 #include "G4HadronNucleonXsc.hh"
38 #include "G4ComponentGGHadronNucleusXsc.hh" 38 #include "G4ComponentGGHadronNucleusXsc.hh"
39 #include "G4NuclearRadii.hh" 39 #include "G4NuclearRadii.hh"
40 #include "G4Pow.hh" <<
41 40
42 namespace << 41 static const G4double inve = 1./CLHEP::eplus;
43 { <<
44 const G4double inve = 1./CLHEP::eplus; <<
45 } <<
46 42
47 G4ComponentGGNuclNuclXsc::G4ComponentGGNuclNuc 43 G4ComponentGGNuclNuclXsc::G4ComponentGGNuclNuclXsc()
48 : G4VComponentCrossSection("Glauber-Gribov Nu << 44 : G4VComponentCrossSection("Glauber-Gribov Nucl-nucl"),
>> 45 fTotalXsc(0.0), fElasticXsc(0.0), fInelasticXsc(0.0), fProductionXsc(0.0),
>> 46 fDiffractionXsc(0.0), fEnergy(0.0), fParticle(nullptr), fZ(0), fA(0)
49 { 47 {
50 theProton = G4Proton::Proton(); 48 theProton = G4Proton::Proton();
51 theNeutron = G4Neutron::Neutron(); 49 theNeutron = G4Neutron::Neutron();
52 theLambda = G4Lambda::Lambda(); <<
53 fHNXsc = new G4HadronNucleonXsc(); 50 fHNXsc = new G4HadronNucleonXsc();
54 fHadrNucl = new G4ComponentGGHadronNucleusXs 51 fHadrNucl = new G4ComponentGGHadronNucleusXsc();
55 } 52 }
56 53
57 G4ComponentGGNuclNuclXsc::~G4ComponentGGNuclNu 54 G4ComponentGGNuclNuclXsc::~G4ComponentGGNuclNuclXsc()
58 { 55 {
59 delete fHNXsc; 56 delete fHNXsc;
60 } 57 }
61 58
62 ////////////////////////////////////////////// 59 //////////////////////////////////////////////////////////////////////
63 60
64 G4double G4ComponentGGNuclNuclXsc::GetTotalEle 61 G4double G4ComponentGGNuclNuclXsc::GetTotalElementCrossSection(
65 const G4ParticleDefinition* aParticle 62 const G4ParticleDefinition* aParticle, G4double kinEnergy,
66 G4int Z, G4double A) 63 G4int Z, G4double A)
67 { 64 {
68 ComputeCrossSections(aParticle, kinEnergy, Z 65 ComputeCrossSections(aParticle, kinEnergy, Z, G4lrint(A));
69 return fTotalXsc; 66 return fTotalXsc;
70 } 67 }
71 68
72 ////////////////////////////////////////////// 69 ////////////////////////////////////////////////////////////////////
73 70
74 G4double G4ComponentGGNuclNuclXsc::GetTotalIso 71 G4double G4ComponentGGNuclNuclXsc::GetTotalIsotopeCrossSection(
75 const G4ParticleDefinition* aParticle 72 const G4ParticleDefinition* aParticle, G4double kinEnergy,
76 G4int Z, G4int A) 73 G4int Z, G4int A)
77 { 74 {
78 ComputeCrossSections(aParticle, kinEnergy, Z 75 ComputeCrossSections(aParticle, kinEnergy, Z, A);
79 return fTotalXsc; 76 return fTotalXsc;
80 } 77 }
81 78
82 ////////////////////////////////////////////// 79 /////////////////////////////////////////////////////////////////////
83 80
84 G4double G4ComponentGGNuclNuclXsc::GetInelasti 81 G4double G4ComponentGGNuclNuclXsc::GetInelasticElementCrossSection(
85 const G4ParticleDefinition* aParticle 82 const G4ParticleDefinition* aParticle, G4double kinEnergy,
86 G4int Z, G4double A) 83 G4int Z, G4double A)
87 { 84 {
88 ComputeCrossSections(aParticle, kinEnergy, Z 85 ComputeCrossSections(aParticle, kinEnergy, Z, G4lrint(A));
89 return fInelasticXsc; 86 return fInelasticXsc;
90 } 87 }
91 88
92 ////////////////////////////////////////////// 89 ////////////////////////////////////////////////////////////////////
93 90
94 G4double G4ComponentGGNuclNuclXsc::GetInelasti 91 G4double G4ComponentGGNuclNuclXsc::GetInelasticIsotopeCrossSection(
95 const G4ParticleDefinition* aParticle 92 const G4ParticleDefinition* aParticle, G4double kinEnergy,
96 G4int Z, G4int A) 93 G4int Z, G4int A)
97 { 94 {
98 ComputeCrossSections(aParticle, kinEnergy, Z 95 ComputeCrossSections(aParticle, kinEnergy, Z, A);
99 return fInelasticXsc; 96 return fInelasticXsc;
100 } 97 }
101 98
102 ////////////////////////////////////////////// 99 //////////////////////////////////////////////////////////////////
103 100
104 G4double G4ComponentGGNuclNuclXsc::GetElasticE 101 G4double G4ComponentGGNuclNuclXsc::GetElasticElementCrossSection(
105 const G4ParticleDefinition* aParticle 102 const G4ParticleDefinition* aParticle, G4double kinEnergy,
106 G4int Z, G4double A) 103 G4int Z, G4double A)
107 { 104 {
108 ComputeCrossSections(aParticle, kinEnergy, Z 105 ComputeCrossSections(aParticle, kinEnergy, Z, G4lrint(A));
109 return fElasticXsc; 106 return fElasticXsc;
110 } 107 }
111 108
112 ////////////////////////////////////////////// 109 ///////////////////////////////////////////////////////////////////
113 110
114 G4double G4ComponentGGNuclNuclXsc::GetElasticI 111 G4double G4ComponentGGNuclNuclXsc::GetElasticIsotopeCrossSection(
115 const G4ParticleDefinition* aParticle 112 const G4ParticleDefinition* aParticle, G4double kinEnergy,
116 G4int Z, G4int A) 113 G4int Z, G4int A)
117 { 114 {
118 ComputeCrossSections(aParticle, kinEnergy, Z 115 ComputeCrossSections(aParticle, kinEnergy, Z, A);
119 return fElasticXsc; 116 return fElasticXsc;
120 } 117 }
121 118
122 ////////////////////////////////////////////// 119 ////////////////////////////////////////////////////////////////
123 120
124 G4double G4ComponentGGNuclNuclXsc::ComputeQuas 121 G4double G4ComponentGGNuclNuclXsc::ComputeQuasiElasticRatio(
125 const G4ParticleDefinition* aParticle 122 const G4ParticleDefinition* aParticle, G4double kinEnergy,
126 G4int Z, G4int A) 123 G4int Z, G4int A)
127 { 124 {
128 ComputeCrossSections(aParticle, kinEnergy, Z 125 ComputeCrossSections(aParticle, kinEnergy, Z, A);
129 return (fInelasticXsc > fProductionXsc) 126 return (fInelasticXsc > fProductionXsc)
130 ? (fInelasticXsc - fProductionXsc)/fInelas 127 ? (fInelasticXsc - fProductionXsc)/fInelasticXsc : 0.0;
131 } 128 }
132 129
133 ////////////////////////////////////////////// 130 //////////////////////////////////////////////////////////////////////
134 131
135 void G4ComponentGGNuclNuclXsc::BuildPhysicsTab 132 void G4ComponentGGNuclNuclXsc::BuildPhysicsTable(const G4ParticleDefinition&)
136 {} 133 {}
137 134
138 ////////////////////////////////////////////// 135 //////////////////////////////////////////////////////////////////////
139 136
140 void G4ComponentGGNuclNuclXsc::DumpPhysicsTabl 137 void G4ComponentGGNuclNuclXsc::DumpPhysicsTable(const G4ParticleDefinition&)
141 { 138 {
142 G4cout << "G4ComponentGGNuclNuclXsc: uses Gl 139 G4cout << "G4ComponentGGNuclNuclXsc: uses Glauber-Gribov formula" << G4endl;
143 } 140 }
144 141
145 ////////////////////////////////////////////// 142 //////////////////////////////////////////////////////////////////////
146 143
147 void G4ComponentGGNuclNuclXsc::Description(std 144 void G4ComponentGGNuclNuclXsc::Description(std::ostream& outFile) const
148 { 145 {
149 outFile << "G4ComponentGGNuclNuclXsc calcula 146 outFile << "G4ComponentGGNuclNuclXsc calculates total, inelastic and\n"
150 << "elastic cross sections for nucle 147 << "elastic cross sections for nucleus-nucleus collisions using\n"
151 << "the Glauber model with Gribov co 148 << "the Glauber model with Gribov corrections. It is valid for\n"
152 << "all incident energies above 100 149 << "all incident energies above 100 keV./n"
153 << "For the hydrogen target G4HadronNucleo 150 << "For the hydrogen target G4HadronNucleonXsc class is used.\n";
154 } 151 }
155 152
156 ////////////////////////////////////////////// 153 ///////////////////////////////////////////////////////////////////////////////
157 // 154 //
158 // Calculates total and inelastic Xsc, derives 155 // Calculates total and inelastic Xsc, derives elastic as total - inelastic
159 // accordong to Glauber model with Gribov corr 156 // accordong to Glauber model with Gribov correction calculated in the dipole
160 // approximation on light cone. Gaussian densi 157 // approximation on light cone. Gaussian density of point-like nucleons helps
161 // to calculate rest integrals of the model. [ 158 // to calculate rest integrals of the model. [1] B.Z. Kopeliovich,
162 // nucl-th/0306044 + simplification above 159 // nucl-th/0306044 + simplification above
163 160
164 void G4ComponentGGNuclNuclXsc::ComputeCrossSec 161 void G4ComponentGGNuclNuclXsc::ComputeCrossSections(
165 const G4ParticleDefinition* aParticle, G4 162 const G4ParticleDefinition* aParticle, G4double kinEnergy,
166 G4int Z, G4int A) 163 G4int Z, G4int A)
167 { 164 {
168 // check cache 165 // check cache
169 if(aParticle == fParticle && fZ == Z && fA = 166 if(aParticle == fParticle && fZ == Z && fA == A && kinEnergy == fEnergy)
170 { return; } 167 { return; }
171 fParticle = aParticle; 168 fParticle = aParticle;
172 fZ = Z; 169 fZ = Z;
173 fA = A; 170 fA = A;
174 fEnergy = kinEnergy; 171 fEnergy = kinEnergy;
175 G4Pow* pG4Pow = G4Pow::GetInstance(); << 172
176 <<
177 G4int pZ = G4lrint(aParticle->GetPDGCharge() 173 G4int pZ = G4lrint(aParticle->GetPDGCharge()*inve);
178 G4int pA = aParticle->GetBaryonNumber(); 174 G4int pA = aParticle->GetBaryonNumber();
179 G4int pL = aParticle->GetNumberOfLambdasInHy <<
180 G4bool pHN = aParticle->IsHypernucleus(); <<
181 G4double cHN(0.88); <<
182 175
183 // hydrogen 176 // hydrogen
184 if(1 == Z && 1 == A) { 177 if(1 == Z && 1 == A) {
185 G4double e = kinEnergy*CLHEP::proton_mass_ 178 G4double e = kinEnergy*CLHEP::proton_mass_c2/aParticle->GetPDGMass();
186 fHadrNucl->ComputeCrossSections( theProton << 179 fHadrNucl->ComputeCrossSections(theProton, e, pZ, pA);
187 fTotalXsc = fHadrNucl->GetTotalGlauberGrib 180 fTotalXsc = fHadrNucl->GetTotalGlauberGribovXsc();
188 fElasticXsc = fHadrNucl->GetElasticGlauber 181 fElasticXsc = fHadrNucl->GetElasticGlauberGribovXsc();
189 fInelasticXsc = fHadrNucl->GetInelasticGla 182 fInelasticXsc = fHadrNucl->GetInelasticGlauberGribovXsc();
190 fProductionXsc = fHadrNucl->GetProductionG 183 fProductionXsc = fHadrNucl->GetProductionGlauberGribovXsc();
191 fDiffractionXsc = fHadrNucl->GetDiffractio 184 fDiffractionXsc = fHadrNucl->GetDiffractionGlauberGribovXsc();
192 return; 185 return;
193 } 186 }
194 static const G4double cofInelastic = 2.4; 187 static const G4double cofInelastic = 2.4;
195 static const G4double cofTotal = 2.0; 188 static const G4double cofTotal = 2.0;
196 189
197 G4double pTkin = kinEnergy/(G4double)pA; 190 G4double pTkin = kinEnergy/(G4double)pA;
198 191
199 G4int pN = pA - pZ; 192 G4int pN = pA - pZ;
200 G4int tN = A - Z; 193 G4int tN = A - Z;
201 194
202 G4double tR = G4NuclearRadii::Radius(Z, A); 195 G4double tR = G4NuclearRadii::Radius(Z, A);
203 G4double pR = G4NuclearRadii::Radius(pZ, pA) << 196 G4double pR = G4NuclearRadii::Radius(pZ, pA);
204 << 197
205 if(pHN) <<
206 pR *= std::sqrt( pG4Pow->Z23( pA - pL ) + <<
207 <<
208 G4double cB = ComputeCoulombBarier(aParticle 198 G4double cB = ComputeCoulombBarier(aParticle, kinEnergy, Z, A, pR, tR);
209 199
210 if ( cB > 0. ) 200 if ( cB > 0. )
211 { 201 {
212 G4double sigma = (pZ*Z+pN*tN)*fHNXsc->Hadr 202 G4double sigma = (pZ*Z+pN*tN)*fHNXsc->HadronNucleonXscNS(theProton, theProton, pTkin);
213 if(pHN) sigma += pL*A*fHNXsc->HadronNucleo <<
214 G4double ppInXsc = fHNXsc->GetInelasticHad 203 G4double ppInXsc = fHNXsc->GetInelasticHadronNucleonXsc();
215 204
216 sigma += (pZ*tN+pN*Z)*fHNXsc->HadronNucleo 205 sigma += (pZ*tN+pN*Z)*fHNXsc->HadronNucleonXscNS(theNeutron, theProton, pTkin);
217 G4double npInXsc = fHNXsc->GetInelasticHad 206 G4double npInXsc = fHNXsc->GetInelasticHadronNucleonXsc();
218 207
>> 208 // G4cout<<"ppInXsc = "<<ppInXsc/millibarn<<"; npInXsc = "<<npInXsc/millibarn<<G4endl;
>> 209 // G4cout<<"npTotXsc = "<<fHNXsc->GetTotalHadronNucleonXsc()/millibarn<<"; npElXsc = "
>> 210 // <<fHNXsc->GetElasticHadronNucleonXsc()/millibarn<<G4endl;
>> 211
219 G4double nucleusSquare = cofTotal*CLHEP::p 212 G4double nucleusSquare = cofTotal*CLHEP::pi*( pR*pR + tR*tR ); // basically 2piRR
220 213
221 G4double ratio= sigma/nucleusSquare; 214 G4double ratio= sigma/nucleusSquare;
222 fTotalXsc = nucleusSquare*G4Log( 1. + 215 fTotalXsc = nucleusSquare*G4Log( 1. + ratio )*cB;
223 fInelasticXsc = nucleusSquare*G4Log( 1. + 216 fInelasticXsc = nucleusSquare*G4Log( 1. + cofInelastic*ratio )*cB/cofInelastic;
224 fElasticXsc = std::max(fTotalXsc - fInel 217 fElasticXsc = std::max(fTotalXsc - fInelasticXsc, 0.0);
225 218
226 G4double difratio = ratio/(1.+ratio); 219 G4double difratio = ratio/(1.+ratio);
227 fDiffractionXsc = 0.5*nucleusSquare*( difr 220 fDiffractionXsc = 0.5*nucleusSquare*( difratio - G4Log( 1. + difratio ) );
228 221
229 G4double xratio= ((pZ*Z+pN*tN)*ppInXsc + ( 222 G4double xratio= ((pZ*Z+pN*tN)*ppInXsc + (pZ*tN+pN*Z)*npInXsc)/nucleusSquare;
230 fProductionXsc = nucleusSquare*G4Log( 1. + 223 fProductionXsc = nucleusSquare*G4Log( 1. + cofInelastic*xratio)*cB/cofInelastic;
231 fProductionXsc = std::min(fProductionXsc, 224 fProductionXsc = std::min(fProductionXsc, fInelasticXsc);
232 } 225 }
233 else 226 else
234 { 227 {
235 fInelasticXsc = fTotalXsc = fElasticXsc = << 228 fInelasticXsc = 0.;
>> 229 fTotalXsc = 0.;
>> 230 fElasticXsc = 0.;
>> 231 fProductionXsc = 0.;
>> 232 fDiffractionXsc= 0.;
236 } 233 }
237 } 234 }
238 235
239 ////////////////////////////////////////////// 236 ///////////////////////////////////////////////////////////////////////////////
240 237
241 G4double G4ComponentGGNuclNuclXsc::ComputeCoul 238 G4double G4ComponentGGNuclNuclXsc::ComputeCoulombBarier(
242 const G4ParticleDefinitio 239 const G4ParticleDefinition* aParticle,
243 G4double pTkin, G4int Z, G4int A, 240 G4double pTkin, G4int Z, G4int A,
244 G4double pR, G4double tR) 241 G4double pR, G4double tR)
245 { 242 {
246 G4int pZ = aParticle->GetPDGCharge()*inve; 243 G4int pZ = aParticle->GetPDGCharge()*inve;
247 G4double pM = aParticle->GetPDGMass(); 244 G4double pM = aParticle->GetPDGMass();
248 G4double tM = G4NucleiProperties::GetNuclear 245 G4double tM = G4NucleiProperties::GetNuclearMass(A, Z);
249 G4double pElab = pTkin + pM; 246 G4double pElab = pTkin + pM;
250 G4double totEcm = std::sqrt(pM*pM + tM*tM + 247 G4double totEcm = std::sqrt(pM*pM + tM*tM + 2.*pElab*tM);
251 G4double totTcm = totEcm - pM -tM; 248 G4double totTcm = totEcm - pM -tM;
252 249
253 // 0.5 defines shape of Cross section correc << 250 static const G4double qfact = CLHEP::fine_structure_const*CLHEP::hbarc;
254 // at cB = totTcm it become zero << 251 G4double bC = qfact*pZ*Z*0.5/(pR + tR);
255 static const G4double qfact = 0.5*CLHEP::elm << 252
256 G4double bC = qfact*pZ*Z/(pR + tR); << 253 G4double ratio = (totTcm <= bC ) ? 0. : 1. - bC/totTcm;
257 << 254 // G4cout<<"G4ComponentGGNuclNuclXsc::ComputeCoulombBarier= "<<ratio
258 G4double ratio = (totTcm <= bC) ? 0. : 1. - << 255 // <<"; pTkin(GeV)= " <<pTkin/GeV<<";
259 << 256 // " pPlab = "<<pPlab/GeV<<"; bC = "<<bC/GeV<<"; pTcm = "
260 #ifdef G4VERBOSE << 257 // <<pTcm/GeV<<G4endl;
261 if (GetVerboseLevel() > 1) { <<
262 G4cout << "G4ComponentGGNuclNuclXsc::Compu <<
263 << "; pTkin(GeV)=" << pTkin/CLHEP::MeV <<
264 << " totTcm= " << totTcm/CLHEP::MeV<< "; <<
265 << G4endl; <<
266 } <<
267 #endif <<
268 return ratio; 258 return ratio;
269 } 259 }
270 260
271 ////////////////////////////////////////////// 261 //////////////////////////////////////////////////////////////////////////
272 // 262 //
273 // Return single-diffraction/inelastic cross-s 263 // Return single-diffraction/inelastic cross-section ratio
274 264
275 G4double G4ComponentGGNuclNuclXsc::GetRatioSD( 265 G4double G4ComponentGGNuclNuclXsc::GetRatioSD(
276 const G4DynamicParticle* aParticle, G 266 const G4DynamicParticle* aParticle, G4double tA, G4double tZ)
277 { 267 {
278 ComputeCrossSections(aParticle->GetDefinitio 268 ComputeCrossSections(aParticle->GetDefinition(),
279 aParticle->GetKineticEn 269 aParticle->GetKineticEnergy(),
280 G4lrint(tZ), G4lrint(tA)); 270 G4lrint(tZ), G4lrint(tA));
281 271
282 return (fInelasticXsc > 0.0) ? fDiffractionX 272 return (fInelasticXsc > 0.0) ? fDiffractionXsc/fInelasticXsc : 0.0;
283 } 273 }
284 274
285 ////////////////////////////////////////////// 275 //////////////////////////////////////////////////////////////////////////
286 // 276 //
287 // Return quasi-elastic/inelastic cross-sectio 277 // Return quasi-elastic/inelastic cross-section ratio
288 278
289 G4double G4ComponentGGNuclNuclXsc::GetRatioQE( 279 G4double G4ComponentGGNuclNuclXsc::GetRatioQE(
290 const G4DynamicParticle* aParticle, G 280 const G4DynamicParticle* aParticle, G4double tA, G4double tZ)
291 { 281 {
292 ComputeCrossSections(aParticle->GetDefinitio 282 ComputeCrossSections(aParticle->GetDefinition(),
293 aParticle->GetKineticEn 283 aParticle->GetKineticEnergy(),
294 G4lrint(tZ), G4lrint(tA)); 284 G4lrint(tZ), G4lrint(tA));
295 285
296 return (fInelasticXsc > 0.0) ? 1.0 - fProduc 286 return (fInelasticXsc > 0.0) ? 1.0 - fProductionXsc/fInelasticXsc : 0.0;
297 } 287 }
298 288
299 ////////////////////////////////////////////// 289 ///////////////////////////////////////////////////////////////////////////////
300 290