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>> 26 // $Id: G4AntiNuclElastic.cc - A.Galoyan 02.05.2011
>> 27 // GEANT4 tag $Name: not supported by cvs2svn $
26 // 28 //
27 // Geant4 Header : G4AntiNuclElastic 29 // Geant4 Header : G4AntiNuclElastic
28 // 30 //
29 // 31 //
30 32
31 #include "G4AntiNuclElastic.hh" <<
32 <<
33 #include "G4PhysicalConstants.hh" <<
34 #include "G4SystemOfUnits.hh" <<
35 #include "G4ParticleTable.hh" 33 #include "G4ParticleTable.hh"
36 #include "G4ParticleDefinition.hh" 34 #include "G4ParticleDefinition.hh"
37 #include "G4IonTable.hh" 35 #include "G4IonTable.hh"
38 #include "Randomize.hh" 36 #include "Randomize.hh"
39 #include "G4AntiProton.hh" 37 #include "G4AntiProton.hh"
40 #include "G4AntiNeutron.hh" 38 #include "G4AntiNeutron.hh"
41 #include "G4AntiDeuteron.hh" 39 #include "G4AntiDeuteron.hh"
42 #include "G4AntiAlpha.hh" 40 #include "G4AntiAlpha.hh"
43 #include "G4AntiTriton.hh" 41 #include "G4AntiTriton.hh"
44 #include "G4AntiHe3.hh" 42 #include "G4AntiHe3.hh"
45 #include "G4Proton.hh" 43 #include "G4Proton.hh"
46 #include "G4Neutron.hh" 44 #include "G4Neutron.hh"
47 #include "G4Deuteron.hh" 45 #include "G4Deuteron.hh"
48 #include "G4Alpha.hh" 46 #include "G4Alpha.hh"
49 #include "G4Pow.hh" 47 #include "G4Pow.hh"
50 #include "G4Exp.hh" << 48 #include "G4AntiNuclElastic.hh"
51 #include "G4Log.hh" <<
52 49
53 #include "G4NucleiProperties.hh" << 50 #include "G4NucleiProperties.hh"
54 #include "G4CrossSectionDataSetRegistry.hh" <<
55 51
56 G4AntiNuclElastic::G4AntiNuclElastic() 52 G4AntiNuclElastic::G4AntiNuclElastic()
57 : G4HadronElastic("AntiAElastic") 53 : G4HadronElastic("AntiAElastic")
58 { 54 {
59 //V.Ivanchenko commented out 55 //V.Ivanchenko commented out
60 //SetMinEnergy( 0.1*GeV ); 56 //SetMinEnergy( 0.1*GeV );
61 //SetMaxEnergy( 10.*TeV ); 57 //SetMaxEnergy( 10.*TeV );
62 58
>> 59
63 theAProton = G4AntiProton::AntiProton( 60 theAProton = G4AntiProton::AntiProton();
64 theANeutron = G4AntiNeutron::AntiNeutro 61 theANeutron = G4AntiNeutron::AntiNeutron();
65 theADeuteron = G4AntiDeuteron::AntiDeute 62 theADeuteron = G4AntiDeuteron::AntiDeuteron();
66 theATriton = G4AntiTriton::AntiTriton( 63 theATriton = G4AntiTriton::AntiTriton();
67 theAAlpha = G4AntiAlpha::AntiAlpha(); 64 theAAlpha = G4AntiAlpha::AntiAlpha();
68 theAHe3 = G4AntiHe3::AntiHe3(); 65 theAHe3 = G4AntiHe3::AntiHe3();
69 66
70 theProton = G4Proton::Proton(); 67 theProton = G4Proton::Proton();
71 theNeutron = G4Neutron::Neutron(); 68 theNeutron = G4Neutron::Neutron();
72 theDeuteron = G4Deuteron::Deuteron(); 69 theDeuteron = G4Deuteron::Deuteron();
73 theAlpha = G4Alpha::Alpha(); 70 theAlpha = G4Alpha::Alpha();
74 71
75 G4CrossSectionDataSetRegistry* reg = G4Cross <<
76 cs = static_cast<G4ComponentAntiNuclNuclearX <<
77 if(!cs) { cs = new G4ComponentAntiNuclNuclea <<
78 72
>> 73 cs = new G4ComponentAntiNuclNuclearXS();
79 fParticle = 0; 74 fParticle = 0;
80 fWaveVector = 0.; 75 fWaveVector = 0.;
81 fBeta = 0.; 76 fBeta = 0.;
82 fZommerfeld = 0.; 77 fZommerfeld = 0.;
83 fAm = 0.; 78 fAm = 0.;
84 fTetaCMS = 0.; 79 fTetaCMS = 0.;
85 fRa = 0.; 80 fRa = 0.;
86 fRef = 0.; 81 fRef = 0.;
87 fceff = 0.; 82 fceff = 0.;
88 fptot = 0.; 83 fptot = 0.;
89 fTmax = 0.; 84 fTmax = 0.;
90 fThetaLab = 0.; 85 fThetaLab = 0.;
91 } 86 }
92 87
93 ////////////////////////////////////////////// 88 /////////////////////////////////////////////////////////////////////////
94 G4AntiNuclElastic::~G4AntiNuclElastic() 89 G4AntiNuclElastic::~G4AntiNuclElastic()
95 {} << 90 {
>> 91 delete cs;
>> 92 }
96 93
97 ////////////////////////////////////////////// 94 ////////////////////////////////////////////////////////////////////////
98 // sample momentum transfer in the CMS system 95 // sample momentum transfer in the CMS system
99 G4double G4AntiNuclElastic::SampleInvariantT(c 96 G4double G4AntiNuclElastic::SampleInvariantT(const G4ParticleDefinition* particle,
100 G4double Plab, G4int Z, G4int 97 G4double Plab, G4int Z, G4int A)
101 { 98 {
102 G4double T; 99 G4double T;
103 G4double Mproj = particle->GetPDGMass(); 100 G4double Mproj = particle->GetPDGMass();
104 G4LorentzVector Pproj(0.,0.,Plab,std::sqrt(P 101 G4LorentzVector Pproj(0.,0.,Plab,std::sqrt(Plab*Plab+Mproj*Mproj));
105 G4double ctet1 = GetcosTeta1(Plab, A); 102 G4double ctet1 = GetcosTeta1(Plab, A);
106 103
107 G4double energy=Pproj.e()-Mproj; 104 G4double energy=Pproj.e()-Mproj;
108 105
109 const G4ParticleDefinition* theParticle = pa 106 const G4ParticleDefinition* theParticle = particle;
110 107
111 G4ParticleDefinition * theTargetDef = 0; << 108 G4ParticleDefinition * theDef = 0;
112 109
113 if (Z == 1 && A == 1) theTargetDef = th << 110 if(Z == 1 && A == 1) theDef = theProton;
114 else if (Z == 1 && A == 2) theTargetDef = th << 111 else if (Z == 1 && A == 2) theDef = theDeuteron;
115 else if (Z == 1 && A == 3) theTargetDef = G4 << 112 else if (Z == 1 && A == 3) theDef = G4Triton::Triton();
116 else if (Z == 2 && A == 3) theTargetDef = G4 << 113 else if (Z == 2 && A == 3) theDef = G4He3::He3();
117 else if (Z == 2 && A == 4) theTargetDef = th << 114 else if (Z == 2 && A == 4) theDef = theAlpha;
118 115
119 116
120 G4double TargMass =G4NucleiProperties::GetNu 117 G4double TargMass =G4NucleiProperties::GetNuclearMass(A,Z);
121 118
122 //transform to CMS 119 //transform to CMS
123 120
124 G4LorentzVector lv(0.0,0.0,0.0,TargMass); 121 G4LorentzVector lv(0.0,0.0,0.0,TargMass);
125 lv += Pproj; 122 lv += Pproj;
126 G4double S = lv.mag2()/(GeV*GeV); << 123 G4double S = lv.mag2()/GeV/GeV;
127 124
128 G4ThreeVector bst = lv.boostVector(); 125 G4ThreeVector bst = lv.boostVector();
129 Pproj.boost(-bst); 126 Pproj.boost(-bst);
130 127
131 G4ThreeVector p1 = Pproj.vect(); 128 G4ThreeVector p1 = Pproj.vect();
132 G4double ptot = p1.mag(); 129 G4double ptot = p1.mag();
133 130
134 fbst = bst; 131 fbst = bst;
135 fptot= ptot; 132 fptot= ptot;
136 fTmax = 4.0*ptot*ptot; // In (MeV/c)^2 << 133 fTmax = 4.0*ptot*ptot;
137 134
138 if(Plab < (std::abs(particle->GetBaryonNumbe << 135 if(Plab/std::abs(particle->GetBaryonNumber()) < 100.*MeV) // Uzhi 24 Nov. 2011
139 {return fTmax*G4UniformRand();} << 136 {return fTmax*G4UniformRand();} // Uzhi 24 Nov. 2011
140 137
141 // Calculation of NN collision properties <<
142 G4double PlabPerN = Plab/std::abs(theParticl <<
143 G4double NucleonMass = 0.5*( theProton->GetP <<
144 G4double PrNucleonMass(0.); // Projectile a <<
145 if( std::abs(theParticle->GetBaryonNumber()) <<
146 else <<
147 G4double energyPerN = std::sqrt( sqr(PlabPer <<
148 energyPerN -= PrNucleonMass; <<
149 //--- <<
150 <<
151 G4double Z1 = particle->GetPDGCharge(); 138 G4double Z1 = particle->GetPDGCharge();
152 G4double Z2 = Z; 139 G4double Z2 = Z;
153 140
154 G4double beta = CalculateParticleBeta(partic 141 G4double beta = CalculateParticleBeta(particle, ptot);
155 G4double n = CalculateZommerfeld( beta, Z1 142 G4double n = CalculateZommerfeld( beta, Z1, Z2 );
156 G4double Am = CalculateAm( ptot, n, Z2 ); 143 G4double Am = CalculateAm( ptot, n, Z2 );
157 fWaveVector = ptot; // /hbarc; 144 fWaveVector = ptot; // /hbarc;
158 145
159 G4LorentzVector Fproj(0.,0.,0.,0.); 146 G4LorentzVector Fproj(0.,0.,0.,0.);
160 const G4double mevToBarn = 0.38938e+6; << 147 G4double XsCoulomb = sqr(n/fWaveVector)*pi*(1+ctet1)/(1.+Am)/(1.+2.*Am-ctet1);
161 G4double XsCoulomb = mevToBarn*sqr(n/fWaveVe << 148 XsCoulomb=XsCoulomb*0.38938e+6;
>> 149
162 150
163 G4double XsElastHadronic =cs->GetElasticElem << 151 G4double XsElastHad =cs->GetElasticElementCrossSection(particle, energy, Z, (G4double)A);
164 G4double XsTotalHadronic =cs->GetTotalElemen << 152 G4double XstotalHad =cs->GetTotalElementCrossSection(particle, energy, Z, (G4double)A);
165 153
166 XsElastHadronic/=millibarn; XsTotalHadronic/ <<
167 154
168 G4double CoulombProb = XsCoulomb/(XsCoulomb << 155 XsElastHad/=millibarn; XstotalHad/=millibarn;
>> 156
>> 157
>> 158 G4double CoulombProb = XsCoulomb/(XsCoulomb+XsElastHad);
>> 159
>> 160 // G4cout<<" XselastHadron " << XsElastHad << " XsCol "<< XsCoulomb <<G4endl;
>> 161 // G4cout <<" XsTotal" << XstotalHad <<G4endl;
>> 162 // G4cout<<"XsInel"<< XstotalHad-XsElastHad<<G4endl;
169 163
170 if(G4UniformRand() < CoulombProb) 164 if(G4UniformRand() < CoulombProb)
171 { // Simulation of Coulomb scattering 165 { // Simulation of Coulomb scattering
172 166
173 G4double phi = twopi * G4UniformRand(); << 167 G4double phi = twopi * G4UniformRand();
174 G4double Ksi = G4UniformRand(); << 168 G4double Ksi = G4UniformRand();
175 169
176 G4double par1 = 2.*(1.+Am)/(1.+ctet1); << 170 G4double par1 = 2.*(1.+Am)/(1.+ctet1);
177 171
178 // ////sample ThetaCMS in Coulomb part << 172 // ////sample ThetaCMS in Coulomb part
179 173
180 G4double cosThetaCMS = (par1*ctet1- Ksi*(1 << 174 G4double cosThetaCMS = (par1*ctet1- Ksi*(1.+2.*Am))/(par1-Ksi);
181 175
182 G4double PtZ=ptot*cosThetaCMS; << 176 G4double PtZ=ptot*cosThetaCMS;
183 Fproj.setPz(PtZ); << 177 Fproj.setPz(PtZ);
184 G4double PtProjCMS = ptot*std::sqrt(1.0 - << 178 G4double PtProjCMS = ptot*std::sqrt(1.0 - cosThetaCMS*cosThetaCMS);
185 G4double PtX= PtProjCMS * std::cos(phi); << 179 G4double PtX= PtProjCMS * std::cos(phi);
186 G4double PtY= PtProjCMS * std::sin(phi); << 180 G4double PtY= PtProjCMS * std::sin(phi);
187 Fproj.setPx(PtX); << 181 Fproj.setPx(PtX);
188 Fproj.setPy(PtY); << 182 Fproj.setPy(PtY);
189 Fproj.setE(std::sqrt(PtX*PtX+PtY*PtY+PtZ*P << 183 Fproj.setE(std::sqrt(PtX*PtX+PtY*PtY+PtZ*PtZ+Mproj*Mproj));
190 T = -(Pproj-Fproj).mag2(); << 184 T = -(Pproj-Fproj).mag2();
191 } << 185 } else
192 else <<
193 { <<
194 // Simulation of strong interaction scatte <<
195 186
196 G4double Qmax = 2.*ptot/197.33; // in fm << 187 {
>> 188 ///////Simulation of strong interaction scattering////////////////////////////
197 189
198 G4double Amag = 1.0; // A1 in Majora << 190 // G4double Qmax = 2.*ptot*197.33; // in fm^-1
199 G4double SlopeMag = 0.5; // A2 in Majora << 191 G4double Qmax = 2.*3.0*197.33; // in fm^-1
200 << 192 G4double Amag = 70*70; // A1 in Magora funct:A1*exp(-q*A2)
201 G4double sig_pbarp = cs->GetAntiHadronNucl << 193 G4double SlopeMag = 2.*3.0; // A2 in Magora funct:A1*exp(-q*A2)
202 << 194
203 fRa = 1.113*G4Pow::GetInstance()->Z13(A) - << 195 G4double sig_pbarp= cs->GetAntiHadronNucleonTotCrSc(particle,energy);
204 0.227/G4Pow::GetInstance()->Z13(A); << 196
205 if(A == 3) fRa=1.81; << 197 fRa = 1.113*G4Pow::GetInstance()->Z13(A) -
206 if(A == 4) fRa=1.37; << 198 0.227/G4Pow::GetInstance()->Z13(A);
>> 199 if(A == 3) fRa=1.81;
>> 200 if(A == 4) fRa=1.37;
207 201
208 if((A>=12.) && (A<27) ) fRa=fRa*0.85; << 202 if((A>=12.) && (A<27) ) fRa=fRa*0.85;
209 if((A>=27.) && (A<48) ) fRa=fRa*0.90; << 203 if((A>=27.) && (A<48) ) fRa=fRa*0.90;
210 if((A>=48.) && (A<65) ) fRa=fRa*0.95; << 204 if((A>=48.) && (A<65) ) fRa=fRa*0.95;
211 << 205
212 G4double Ref2 = XsTotalHadronic/10./2./pi; << 206 G4double Ref2 = 0;
213 G4double ceff2 = 0.0; << 207 G4double ceff2 =0;
214 G4double rho = 0.0; << 208 G4double rho = 0;
215 << 209 if ((theParticle == theAProton) || (theParticle == theANeutron))
216 if ((theParticle == theAProton) || (thePa << 210 {
217 { << 211 if(theDef == theProton)
218 if(theTargetDef == theProton) << 212 {
219 { << 213 // G4double Mp2=sqr(theDef->GetPDGMass()/GeV );
220 // Determination of the real part of P << 214
221 if(Plab < 610.) << 215 // change 30 October
222 { rho = 1.3347-10.342*Plab/1000.+22.27 << 216
223 13.634*Plab/1000.*Plab/1000.*P << 217 if(Plab < 610.)
224 if((Plab < 5500.)&&(Plab >= 610.) ) << 218 { rho = 1.3347-10.342*Plab/1000.+22.277*Plab/1000.*Plab/1000.-
225 { rho = 0.22; } << 219 13.634*Plab/1000.*Plab/1000.*Plab/1000. ;}
226 if((Plab >= 5500.)&&(Plab < 12300.) ) << 220 if((Plab < 5500.)&&(Plab >= 610.) )
227 { rho = -0.32; } << 221 { rho = 0.22; }
228 if( Plab >= 12300.) << 222 if((Plab >= 5500.)&&(Plab < 12300.) )
229 { rho = 0.135-2.26/(std::sqrt(S)) ;} << 223 { rho = -0.32; }
230 Ref2 = 0.35 + 0.9/std::sqrt(std::sqrt << 224 if( Plab >= 12300.)
231 ceff2 = 0.375 - 2./S + 0.44/(sqr(S-4.) << 225 { rho = 0.135-2.26/(std::sqrt(S)) ;}
232 Ref2 =Ref2*Ref2; << 226
233 ceff2 = ceff2*ceff2; << 227 Ref2 = 0.35 + 0.9/std::sqrt(std::sqrt(S-4.*0.88))+0.04*std::log(S) ;
234 } << 228 ceff2 = 0.375 - 2./S + 0.44/(sqr(S-4.)+1.5) ;
235 << 229
236 if( (Z==1)&&(A==2) ) << 230 /*
237 { << 231 Ref2=0.8/std::sqrt(std::sqrt(S-4.*Mp2)) + 0.55;
238 Ref2 = fRa*fRa - 0.28 + 0.019 * sig_pb << 232 if(S>1000.) Ref2=0.62+0.02*std::log(S) ;
239 ceff2 = 0.297 + 7.853e-04*sig_pbarp + << 233 ceff2 = 0.035/(sqr(S-4.3)+0.4) + 0.085 * std::log(S) ;
240 } << 234 if(S>1000.) ceff2 = 0.005 * std::log(S) + 0.29;
241 if( (Z==1)&&(A==3) ) << 235 */
242 { << 236
243 Ref2 = fRa*fRa - 1.36 + 0.025 * sig_pb << 237 Ref2=Ref2*Ref2;
244 ceff2 = 0.149 + 7.091e-04*sig_pbarp + << 238 ceff2 = ceff2*ceff2;
245 } << 239
246 if( (Z==2)&&(A==3) ) << 240 SlopeMag = 0.5; // Uzhi
247 { << 241 Amag= 1.; // Uzhi
248 Ref2 = fRa*fRa - 1.36 + 0.025 * sig_pb << 242 }
249 ceff2 = 0.149 + 7.091e-04*sig_pbarp + << 243
250 } << 244 if(Z>2)
251 if( (Z==2)&&(A==4) ) << 245 { Ref2 = fRa*fRa +2.48*0.01*sig_pbarp*fRa - 2.23e-6*sig_pbarp*sig_pbarp*fRa*fRa;
252 { << 246 ceff2 = 0.16+3.3e-4*sig_pbarp+0.35*std::exp(-0.03*sig_pbarp);
253 Ref2 = fRa*fRa -0.46 +0.03*sig_pbarp - << 247 }
254 ceff2= 0.078 + 6.657e-4*sig_pbarp + 0. << 248 if( (Z==2)&&(A==4) )
255 } << 249 { Ref2 = fRa*fRa -0.46 +0.03*sig_pbarp - 2.98e-6*sig_pbarp*sig_pbarp;
256 if(Z>2) << 250 ceff2= 0.078 + 6.657e-4*sig_pbarp + 0.3359*std::exp(-0.03*sig_pbarp);
257 { << 251 }
258 Ref2 = fRa*fRa +2.48*0.01*sig_pbarp*fR << 252 if( (Z==1)&&(A==3) )
259 ceff2 = 0.16+3.3e-4*sig_pbarp+0.35*G4E << 253 { Ref2 = fRa*fRa - 1.36 + 0.025 * sig_pbarp - 3.69e-7 * sig_pbarp*sig_pbarp;
260 } << 254 ceff2 = 0.149 + 7.091e-04*sig_pbarp + 0.3743*std::exp(-0.03*sig_pbarp);
261 } // End of if ((theParticle == theAProto << 255 }
262 << 256 if( (Z==2)&&(A==3) )
263 if (theParticle == theADeuteron) << 257 { Ref2 = fRa*fRa - 1.36 + 0.025 * sig_pbarp - 3.69e-7 * sig_pbarp*sig_pbarp;
264 { << 258 ceff2 = 0.149 + 7.091e-04*sig_pbarp + 0.3743*std::exp(-0.03*sig_pbarp);
265 if(theTargetDef == theProton) << 259 }
266 { << 260 if( (Z==1)&&(A==2) )
267 ceff2 = 0.297 + 7.853e-04*sig_pbarp + << 261 {
268 } << 262 Ref2 = fRa*fRa - 0.28 + 0.019 * sig_pbarp + 2.06e-6 * sig_pbarp*sig_pbarp;
269 if(theTargetDef == theDeuteron) << 263 ceff2 = 0.297 + 7.853e-04*sig_pbarp + 0.2899*std::exp(-0.03*sig_pbarp);
270 { << 264 }
271 ceff2 = 0.65 + 3.0e-4*sig_pbarp + 0.55 << 265 }
272 } << 266
273 if( (theTargetDef == G4Triton::Triton()) << 267 if (theParticle == theADeuteron)
274 { << 268 {
275 ceff2 = 0.57 + 2.5e-4*sig_pbarp + 0.65 << 269 sig_pbarp= cs->GetAntiHadronNucleonTotCrSc(particle,energy/2.);
276 } << 270 Ref2 = XstotalHad/10./2./pi ;
277 if(theTargetDef == theAlpha) << 271 if(Z>2)
278 { << 272 {
279 ceff2 = 0.40 + 3.5e-4 *sig_pbarp + 0.4 << 273 ceff2 = 0.38 + 2.0e-4 *sig_pbarp + 0.5 * std::exp(-0.03*sig_pbarp);
280 } << 274 }
281 if(Z>2) << 275 if(theDef == theProton)
282 { << 276 {
283 ceff2 = 0.38 + 2.0e-4 *sig_pbarp + 0.5 << 277 ceff2 = 0.297 + 7.853e-04*sig_pbarp + 0.2899*std::exp(-0.03*sig_pbarp);
284 } << 278 }
285 } << 279 if(theDef == theDeuteron)
286 << 280 {
287 if( (theParticle ==theAHe3) || (theParticl << 281 ceff2 = 0.65 + 3.0e-4*sig_pbarp + 0.55 * std::exp(-0.03*sig_pbarp);
288 { <<
289 if(theTargetDef == theProton) <<
290 { <<
291 ceff2 = 0.149 + 7.091e-04*sig_pbarp + <<
292 } <<
293 if(theTargetDef == theDeuteron) <<
294 { <<
295 ceff2 = 0.57 + 2.5e-4*sig_pbarp + 0.65 <<
296 } <<
297 if( (theTargetDef == G4Triton::Triton()) <<
298 { <<
299 ceff2 = 0.39 + 2.7e-4*sig_pbarp + 0.7 <<
300 } <<
301 if(theTargetDef == theAlpha) <<
302 { <<
303 ceff2 = 0.24 + 3.5e-4*sig_pbarp + 0.75 <<
304 } <<
305 if(Z>2) <<
306 { <<
307 ceff2 = 0.26 + 2.2e-4*sig_pbarp + 0.33 <<
308 } <<
309 } <<
310 <<
311 if ( (theParticle == theAAlpha) || (ceff2 <<
312 { <<
313 if(theTargetDef == theProton) <<
314 { <<
315 ceff2= 0.078 + 6.657e-4*sig_pbarp + 0. <<
316 } <<
317 if(theTargetDef == theDeuteron) <<
318 { <<
319 ceff2 = 0.40 + 3.5e-4 *sig_pbarp + 0.4 <<
320 } <<
321 if( (theTargetDef == G4Triton::Triton()) <<
322 { <<
323 ceff2 = 0.24 + 3.5e-4*sig_pbarp + 0.75 <<
324 } <<
325 if(theTargetDef == theAlpha) <<
326 { <<
327 ceff2 = 0.17 + 3.5e-4*sig_pbarp + 0.45 <<
328 } <<
329 if(Z>2) <<
330 { <<
331 ceff2 = 0.22 + 2.0e-4*sig_pbarp + 0.2 <<
332 } <<
333 } <<
334 <<
335 fRef=std::sqrt(Ref2); <<
336 fceff = std::sqrt(ceff2); <<
337 <<
338 G4double Q = 0.0 ; <<
339 G4double BracFunct; <<
340 <<
341 const G4int maxNumberOfLoops = 10000; <<
342 G4int loopCounter = 0; <<
343 do <<
344 { <<
345 Q = -G4Log(1.-(1.- G4Exp(-SlopeMag * Qma <<
346 G4double x = fRef * Q; <<
347 BracFunct = ( ( sqr(BesselOneByArg(x))+s <<
348 * sqr(DampFactor(pi*fceff*Q))) /(Ama <<
349 BracFunct = BracFunct * Q; <<
350 } <<
351 while ( (G4UniformRand()>BracFunct) && <<
352 ++loopCounter < maxNumberOfLoops ) <<
353 if ( loopCounter >= maxNumberOfLoops ) { <<
354 fTetaCMS = 0.0; <<
355 return 0.0; <<
356 } 282 }
>> 283 if( (theDef == G4Triton::Triton()) || (theDef == G4He3::He3() ) )
>> 284 {
>> 285 ceff2 = 0.57 + 2.5e-4*sig_pbarp + 0.65 * std::exp(-0.02*sig_pbarp);
>> 286 }
>> 287 if(theDef == theAlpha)
>> 288 {
>> 289 ceff2 = 0.40 + 3.5e-4 *sig_pbarp + 0.45 * std::exp(-0.02*sig_pbarp);
>> 290 }
>> 291 }
357 292
358 T= sqr(Q); << 293 if( (theParticle ==theAHe3) || (theParticle ==theATriton) )
359 T*=3.893913e+4; // fm^(-2) -> MeV^2 << 294 {
>> 295 sig_pbarp = cs->GetAntiHadronNucleonTotCrSc(particle,energy/3.);
>> 296 Ref2 = XstotalHad/10./2./pi ;
>> 297 if(Z>2)
>> 298 {
>> 299 ceff2 = 0.26 + 2.2e-4*sig_pbarp + 0.33*std::exp(-0.03*sig_pbarp);
>> 300 }
>> 301 if(theDef == theProton)
>> 302 {
>> 303 ceff2 = 0.149 + 7.091e-04*sig_pbarp + 0.3743*std::exp(-0.03*sig_pbarp);
>> 304 }
>> 305 if(theDef == theDeuteron)
>> 306 {
>> 307 ceff2 = 0.57 + 2.5e-4*sig_pbarp + 0.65 * std::exp(-0.02*sig_pbarp);
>> 308 }
>> 309 if( (theDef == G4Triton::Triton()) || (theDef == G4He3::He3() ) )
>> 310 {
>> 311 ceff2 = 0.39 + 2.7e-4*sig_pbarp + 0.7 * std::exp(-0.02*sig_pbarp);
>> 312 }
>> 313 if(theDef == theAlpha)
>> 314 {
>> 315 ceff2 = 0.24 + 3.5e-4*sig_pbarp + 0.75 * std::exp(-0.03*sig_pbarp);
>> 316 }
>> 317 }
360 318
361 } // End of simulation of strong interactio <<
362 319
363 return T; << 320 if (theParticle == theAAlpha)
>> 321 {
>> 322 sig_pbarp = cs->GetAntiHadronNucleonTotCrSc(particle,energy/3.);
>> 323 Ref2 = XstotalHad/10./2./pi ;
>> 324 if(Z>2)
>> 325 {
>> 326 ceff2 = 0.22 + 2.0e-4*sig_pbarp + 0.2 * std::exp(-0.03*sig_pbarp);
>> 327 }
>> 328 if(theDef == theProton)
>> 329 {
>> 330 ceff2= 0.078 + 6.657e-4*sig_pbarp + 0.3359*std::exp(-0.03*sig_pbarp);
>> 331 }
>> 332 if(theDef == theDeuteron)
>> 333 {
>> 334 ceff2 = 0.40 + 3.5e-4 *sig_pbarp + 0.45 * std::exp(-0.02*sig_pbarp);
>> 335 }
>> 336 if( (theDef == G4Triton::Triton()) || (theDef == G4He3::He3() ) )
>> 337 {
>> 338 ceff2 = 0.24 + 3.5e-4*sig_pbarp + 0.75 * std::exp(-0.03*sig_pbarp);
>> 339 }
>> 340 if(theDef == theAlpha)
>> 341 {
>> 342 ceff2 = 0.17 + 3.5e-4*sig_pbarp + 0.45 * std::exp(-0.03*sig_pbarp);
>> 343 }
>> 344 }
>> 345
>> 346 fRef=std::sqrt(Ref2);
>> 347 fceff = std::sqrt(ceff2);
>> 348 // G4cout<<" Ref "<<fRef<<" c_eff "<<fceff<< " rho "<< rho<<G4endl;
>> 349
>> 350
>> 351 G4double Q = 0.0 ;
>> 352 G4double BracFunct;
>> 353 do
>> 354 {
>> 355 Q = -std::log(1.-(1.- std::exp(-SlopeMag * Qmax))* G4UniformRand() )/SlopeMag;
>> 356 G4double x = fRef * Q;
>> 357 BracFunct = ( ( sqr(BesselOneByArg(x))+sqr(rho/2. * BesselJzero(x)) )
>> 358 * sqr(DampFactor(pi*fceff*Q))) /(Amag*std::exp(-SlopeMag*Q));
>> 359
>> 360 BracFunct = BracFunct * Q * sqr(sqr(fRef));
>> 361 }
>> 362 while (G4UniformRand()>BracFunct);
>> 363
>> 364 T= sqr(Q);
>> 365 T*=3.893913e+4; // fm -> MeV^2
>> 366 }
>> 367
>> 368 G4double cosTet=1.0-T/(2.*ptot*ptot);
>> 369 if(cosTet > 1.0 ) cosTet= 1.; // Uzhi 30 Nov.
>> 370 if(cosTet < -1.0 ) cosTet=-1.; // Uzhi 30 Nov.
>> 371 fTetaCMS=std::acos(cosTet);
>> 372
>> 373 return T;
364 } 374 }
365 375
366 ////////////////////////////////////////////// 376 /////////////////////////////////////////////////////////////////////
367 // Sample of Theta in CMS 377 // Sample of Theta in CMS
368 G4double G4AntiNuclElastic::SampleThetaCMS(co 378 G4double G4AntiNuclElastic::SampleThetaCMS(const G4ParticleDefinition* p, G4double plab,
369 379 G4int Z, G4int A)
370 { 380 {
371 G4double T; 381 G4double T;
372 T = SampleInvariantT( p, plab, Z, A); 382 T = SampleInvariantT( p, plab, Z, A);
373 383
374 // NaN finder 384 // NaN finder
375 if(!(T < 0.0 || T >= 0.0)) 385 if(!(T < 0.0 || T >= 0.0))
376 { 386 {
377 if (verboseLevel > 0) 387 if (verboseLevel > 0)
378 { 388 {
379 G4cout << "G4DiffuseElastic:WARNING: A = 389 G4cout << "G4DiffuseElastic:WARNING: A = " << A
380 << " mom(GeV)= " << plab/GeV 390 << " mom(GeV)= " << plab/GeV
381 << " S-wave will be sampled" 391 << " S-wave will be sampled"
382 << G4endl; 392 << G4endl;
383 } 393 }
384 T = G4UniformRand()*fTmax; 394 T = G4UniformRand()*fTmax;
385 395
386 } 396 }
387 397
388 if(fptot > 0.) << 398 if(fptot > 0.) // Uzhi 24 Nov. 2011
389 { 399 {
390 G4double cosTet=1.0-T/(2.*fptot*fptot); 400 G4double cosTet=1.0-T/(2.*fptot*fptot);
391 if(cosTet > 1.0 ) cosTet= 1.; << 401 if(cosTet > 1.0 ) cosTet= 1.; // Uzhi 30 Nov.
392 if(cosTet < -1.0 ) cosTet=-1.; << 402 if(cosTet < -1.0 ) cosTet=-1.; // Uzhi 30 Nov.
393 fTetaCMS=std::acos(cosTet); 403 fTetaCMS=std::acos(cosTet);
394 return fTetaCMS; 404 return fTetaCMS;
395 } else << 405 } else // Uzhi 24 Nov. 2011
396 { << 406 { // Uzhi 24 Nov. 2011
397 return 2.*G4UniformRand()-1.; << 407 return 2.*G4UniformRand()-1.; // Uzhi 24 Nov. 2011
398 } << 408 } // Uzhi 24 Nov. 2011
399 } 409 }
400 410
401 411
402 ////////////////////////////////////////////// 412 /////////////////////////////////////////////////////////////////////
403 // Sample of Theta in Lab System 413 // Sample of Theta in Lab System
404 G4double G4AntiNuclElastic::SampleThetaLab(co 414 G4double G4AntiNuclElastic::SampleThetaLab(const G4ParticleDefinition* p, G4double plab,
405 415 G4int Z, G4int A)
406 { 416 {
407 G4double T; 417 G4double T;
408 T = SampleInvariantT( p, plab, Z, A); 418 T = SampleInvariantT( p, plab, Z, A);
409 419
410 // NaN finder 420 // NaN finder
411 if(!(T < 0.0 || T >= 0.0)) 421 if(!(T < 0.0 || T >= 0.0))
412 { 422 {
413 if (verboseLevel > 0) 423 if (verboseLevel > 0)
414 { 424 {
415 G4cout << "G4DiffuseElastic:WARNING: A = 425 G4cout << "G4DiffuseElastic:WARNING: A = " << A
416 << " mom(GeV)= " << plab/GeV 426 << " mom(GeV)= " << plab/GeV
417 << " S-wave will be sampled" 427 << " S-wave will be sampled"
418 << G4endl; 428 << G4endl;
419 } 429 }
420 T = G4UniformRand()*fTmax; 430 T = G4UniformRand()*fTmax;
421 } 431 }
422 432
423 G4double phi = G4UniformRand()*twopi; 433 G4double phi = G4UniformRand()*twopi;
424 434
425 G4double cost(1.); 435 G4double cost(1.);
426 if(fTmax > 0.) {cost = 1. - 2.0*T/fTmax;} << 436 if(fTmax > 0.) {cost = 1. - 2.0*T/fTmax;} // Uzhi 24 Nov. 2011
427 437
428 G4double sint; 438 G4double sint;
429 if( cost >= 1.0 ) 439 if( cost >= 1.0 )
430 { 440 {
431 cost = 1.0; 441 cost = 1.0;
432 sint = 0.0; 442 sint = 0.0;
433 } 443 }
434 else if( cost <= -1.0) 444 else if( cost <= -1.0)
435 { 445 {
436 cost = -1.0; 446 cost = -1.0;
437 sint = 0.0; 447 sint = 0.0;
438 } 448 }
439 else 449 else
440 { 450 {
441 sint = std::sqrt((1.0-cost)*(1.0+cost)); 451 sint = std::sqrt((1.0-cost)*(1.0+cost));
442 } 452 }
443 453
444 G4double m1 = p->GetPDGMass(); 454 G4double m1 = p->GetPDGMass();
445 G4ThreeVector v(sint*std::cos(phi),sint*std: 455 G4ThreeVector v(sint*std::cos(phi),sint*std::sin(phi),cost);
446 v *= fptot; 456 v *= fptot;
447 G4LorentzVector nlv(v.x(),v.y(),v.z(),std::s 457 G4LorentzVector nlv(v.x(),v.y(),v.z(),std::sqrt(fptot*fptot + m1*m1));
448 458
449 nlv.boost(fbst); 459 nlv.boost(fbst);
450 460
451 G4ThreeVector np = nlv.vect(); 461 G4ThreeVector np = nlv.vect();
452 G4double theta = np.theta(); 462 G4double theta = np.theta();
453 fThetaLab = theta; 463 fThetaLab = theta;
454 464
455 return theta; 465 return theta;
456 } 466 }
457 467
458 ////////////////////////////////////////////// 468 ////////////////////////////////////////////////////////////////////
459 // Calculation of Damp factor 469 // Calculation of Damp factor
460 G4double G4AntiNuclElastic::DampFactor(G4doub 470 G4double G4AntiNuclElastic::DampFactor(G4double x)
461 { 471 {
462 G4double df; 472 G4double df;
463 G4double f3 = 6.; // first factorials 473 G4double f3 = 6.; // first factorials
464 474
465 if( std::fabs(x) < 0.01 ) 475 if( std::fabs(x) < 0.01 )
466 { 476 {
467 df=1./(1.+x*x/f3); 477 df=1./(1.+x*x/f3);
468 } 478 }
469 else 479 else
470 { 480 {
471 df = x/std::sinh(x); 481 df = x/std::sinh(x);
472 } 482 }
473 return df; 483 return df;
474 } 484 }
475 485
476 486
477 ////////////////////////////////////////////// 487 /////////////////////////////////////////////////////////////////////////////////
478 // Calculation of particle velocity Beta 488 // Calculation of particle velocity Beta
479 489
480 G4double G4AntiNuclElastic::CalculateParticle 490 G4double G4AntiNuclElastic::CalculateParticleBeta( const G4ParticleDefinition* particle,
481 G4double mom 491 G4double momentum )
482 { 492 {
483 G4double mass = particle->GetPDGMass(); 493 G4double mass = particle->GetPDGMass();
484 G4double a = momentum/mass; 494 G4double a = momentum/mass;
485 fBeta = a/std::sqrt(1+a*a); 495 fBeta = a/std::sqrt(1+a*a);
486 496
487 return fBeta; 497 return fBeta;
488 } 498 }
489 499
490 500
491 ////////////////////////////////////////////// 501 ///////////////////////////////////////////////////////////////////////////////////
492 // Calculation of parameter Zommerfeld 502 // Calculation of parameter Zommerfeld
493 503
494 G4double G4AntiNuclElastic::CalculateZommerfe 504 G4double G4AntiNuclElastic::CalculateZommerfeld( G4double beta, G4double Z1, G4double Z2 )
495 { 505 {
496 fZommerfeld = fine_structure_const*Z1*Z2/bet 506 fZommerfeld = fine_structure_const*Z1*Z2/beta;
497 507
498 return fZommerfeld; 508 return fZommerfeld;
499 } 509 }
500 510
501 ////////////////////////////////////////////// 511 ////////////////////////////////////////////////////////////////////////////////////
502 // 512 //
503 G4double G4AntiNuclElastic::CalculateAm( G4dou 513 G4double G4AntiNuclElastic::CalculateAm( G4double momentum, G4double n, G4double Z)
504 { 514 {
505 G4double k = momentum/hbarc; 515 G4double k = momentum/hbarc;
506 G4double ch = 1.13 + 3.76*n*n; 516 G4double ch = 1.13 + 3.76*n*n;
507 G4double zn = 1.77*k/G4Pow::GetInstance()-> 517 G4double zn = 1.77*k/G4Pow::GetInstance()->A13(Z)*Bohr_radius;
508 G4double zn2 = zn*zn; 518 G4double zn2 = zn*zn;
509 fAm = ch/zn2; 519 fAm = ch/zn2;
510 520
511 return fAm; 521 return fAm;
512 } 522 }
513 523
514 ////////////////////////////////////////////// 524 /////////////////////////////////////////////////////////////
515 // 525 //
516 // Bessel J0 function based on rational approx 526 // Bessel J0 function based on rational approximation from
517 // J.F. Hart, Computer Approximations, New Yor 527 // J.F. Hart, Computer Approximations, New York, Willey 1968, p. 141
518 528
519 G4double G4AntiNuclElastic::BesselJzero(G4doub 529 G4double G4AntiNuclElastic::BesselJzero(G4double value)
520 { 530 {
521 G4double modvalue, value2, fact1, fact2, arg 531 G4double modvalue, value2, fact1, fact2, arg, shift, bessel;
522 532
523 modvalue = std::fabs(value); 533 modvalue = std::fabs(value);
524 534
525 if ( value < 8.0 && value > -8.0 ) 535 if ( value < 8.0 && value > -8.0 )
526 { 536 {
527 value2 = value*value; 537 value2 = value*value;
528 538
529 fact1 = 57568490574.0 + value2*(-13362590 539 fact1 = 57568490574.0 + value2*(-13362590354.0
530 + value2*( 65161964 540 + value2*( 651619640.7
531 + value2*(-11214424 541 + value2*(-11214424.18
532 + value2*( 77392.33 542 + value2*( 77392.33017
533 + value2*(-184.9052 543 + value2*(-184.9052456 ) ) ) ) );
534 544
535 fact2 = 57568490411.0 + value2*( 10295329 545 fact2 = 57568490411.0 + value2*( 1029532985.0
536 + value2*( 9494680. 546 + value2*( 9494680.718
537 + value2*(59272.648 547 + value2*(59272.64853
538 + value2*(267.85327 548 + value2*(267.8532712
539 + value2*1.0 549 + value2*1.0 ) ) ) );
540 550
541 bessel = fact1/fact2; 551 bessel = fact1/fact2;
542 } 552 }
543 else 553 else
544 { 554 {
545 arg = 8.0/modvalue; 555 arg = 8.0/modvalue;
546 556
547 value2 = arg*arg; 557 value2 = arg*arg;
548 558
549 shift = modvalue-0.785398164; 559 shift = modvalue-0.785398164;
550 560
551 fact1 = 1.0 + value2*(-0.1098628627e-2 561 fact1 = 1.0 + value2*(-0.1098628627e-2
552 + value2*(0.2734510407e-4 562 + value2*(0.2734510407e-4
553 + value2*(-0.2073370639e-5 563 + value2*(-0.2073370639e-5
554 + value2*0.2093887211e-6 ) 564 + value2*0.2093887211e-6 ) ) );
555 fact2 = -0.1562499995e-1 + value2*(0.143048 565 fact2 = -0.1562499995e-1 + value2*(0.1430488765e-3
556 + value2*(-0.691 566 + value2*(-0.6911147651e-5
557 + value2*(0.7621 567 + value2*(0.7621095161e-6
558 - value2*0.93494 568 - value2*0.934945152e-7 ) ) );
559 569
560 bessel = std::sqrt(0.636619772/modvalue)*( 570 bessel = std::sqrt(0.636619772/modvalue)*(std::cos(shift)*fact1 - arg*std::sin(shift)*fact2);
561 } 571 }
562 return bessel; 572 return bessel;
563 } 573 }
564 574
565 575
566 ////////////////////////////////////////////// 576 //////////////////////////////////////////////////////////////////////////////
567 // Bessel J1 function based on rational approx 577 // Bessel J1 function based on rational approximation from
568 // J.F. Hart, Computer Approximations, New Yor 578 // J.F. Hart, Computer Approximations, New York, Willey 1968, p. 141
569 579
570 G4double G4AntiNuclElastic::BesselJone(G4doub 580 G4double G4AntiNuclElastic::BesselJone(G4double value)
571 { 581 {
572 G4double modvalue, value2, fact1, fact2, arg 582 G4double modvalue, value2, fact1, fact2, arg, shift, bessel;
573 583
574 modvalue = std::fabs(value); 584 modvalue = std::fabs(value);
575 585
576 if ( modvalue < 8.0 ) 586 if ( modvalue < 8.0 )
577 { 587 {
578 value2 = value*value; 588 value2 = value*value;
579 fact1 = value*(72362614232.0 + value2*(-7 589 fact1 = value*(72362614232.0 + value2*(-7895059235.0
580 + value2*( 2 590 + value2*( 242396853.1
581 + value2*(-2 591 + value2*(-2972611.439
582 + value2*( 1 592 + value2*( 15704.48260
583 + value2*(-3 593 + value2*(-30.16036606 ) ) ) ) ) );
584 594
585 fact2 = 144725228442.0 + value2*(23005351 595 fact2 = 144725228442.0 + value2*(2300535178.0
586 + value2*(18583304 596 + value2*(18583304.74
587 + value2*(99447.43 597 + value2*(99447.43394
588 + value2*(376.9991 598 + value2*(376.9991397
589 + value2*1.0 599 + value2*1.0 ) ) ) );
590 bessel = fact1/fact2; 600 bessel = fact1/fact2;
591 } 601 }
592 else 602 else
593 { 603 {
594 arg = 8.0/modvalue; 604 arg = 8.0/modvalue;
595 value2 = arg*arg; 605 value2 = arg*arg;
596 606
597 shift = modvalue - 2.356194491; 607 shift = modvalue - 2.356194491;
598 608
599 fact1 = 1.0 + value2*( 0.183105e-2 609 fact1 = 1.0 + value2*( 0.183105e-2
600 + value2*(-0.3516396496e-4 610 + value2*(-0.3516396496e-4
601 + value2*(0.2457520174e-5 611 + value2*(0.2457520174e-5
602 + value2*(-0.240337019e-6 612 + value2*(-0.240337019e-6 ) ) ) );
603 613
604 fact2 = 0.04687499995 + value2*(-0.2002690 614 fact2 = 0.04687499995 + value2*(-0.2002690873e-3
605 + value2*( 0.8449199 615 + value2*( 0.8449199096e-5
606 + value2*(-0.8822898 616 + value2*(-0.88228987e-6
607 + value2*0.105787412 617 + value2*0.105787412e-6 ) ) );
608 618
609 bessel = std::sqrt( 0.636619772/modvalue)* 619 bessel = std::sqrt( 0.636619772/modvalue)*(std::cos(shift)*fact1 - arg*std::sin(shift)*fact2);
610 if (value < 0.0) bessel = -bessel; 620 if (value < 0.0) bessel = -bessel;
611 } 621 }
612 return bessel; 622 return bessel;
613 } 623 }
614 624
615 ////////////////////////////////////////////// 625 ////////////////////////////////////////////////////////////////////////////////
616 // return J1(x)/x with special case for small 626 // return J1(x)/x with special case for small x
617 G4double G4AntiNuclElastic::BesselOneByArg(G4d 627 G4double G4AntiNuclElastic::BesselOneByArg(G4double x)
618 { 628 {
619 G4double x2, result; 629 G4double x2, result;
620 630
621 if( std::fabs(x) < 0.01 ) 631 if( std::fabs(x) < 0.01 )
622 { 632 {
623 x *= 0.5; 633 x *= 0.5;
624 x2 = x*x; 634 x2 = x*x;
625 result = (2.- x2 + x2*x2/6.)/4.; 635 result = (2.- x2 + x2*x2/6.)/4.;
626 } 636 }
627 else 637 else
628 { 638 {
629 result = BesselJone(x)/x; 639 result = BesselJone(x)/x;
630 } 640 }
631 return result; 641 return result;
632 } 642 }
633 643
634 ////////////////////////////////////////////// 644 /////////////////////////////////////////////////////////////////////////////////
635 // return angle from which Coulomb scattering 645 // return angle from which Coulomb scattering is calculated
636 G4double G4AntiNuclElastic::GetcosTeta1(G4doub 646 G4double G4AntiNuclElastic::GetcosTeta1(G4double plab, G4int A)
637 { 647 {
638 648
639 // G4double p0 =G4LossTableManager::Instance() 649 // G4double p0 =G4LossTableManager::Instance()->FactorForAngleLimit()*CLHEP::hbarc/CLHEP::fermi;
640 G4double p0 = 1.*hbarc/fermi; 650 G4double p0 = 1.*hbarc/fermi;
641 //G4double cteta1 = 1.0 - p0*p0/2.0 * pow(A,2. 651 //G4double cteta1 = 1.0 - p0*p0/2.0 * pow(A,2./3.)/(plab*plab);
642 G4double cteta1 = 1.0 - p0*p0/2.0 * G4Pow::G 652 G4double cteta1 = 1.0 - p0*p0/2.0 * G4Pow::GetInstance()->Z23(A)/(plab*plab);
643 ////////////////// 653 //////////////////
644 if(cteta1 < -1.) cteta1 = -1.0; 654 if(cteta1 < -1.) cteta1 = -1.0;
645 return cteta1; 655 return cteta1;
646 } 656 }
647 657
648 658
649 659
650 660
651 661
652 662
653 663
654 664