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Geant4/processes/hadronic/models/coherent_elastic/src/G4AntiNuclElastic.cc

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Differences between /processes/hadronic/models/coherent_elastic/src/G4AntiNuclElastic.cc (Version 11.3.0) and /processes/hadronic/models/coherent_elastic/src/G4AntiNuclElastic.cc (Version 9.5)


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 25 //                                                 25 //
                                                   >>  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     {                                          << 282     }
289       if(theTargetDef == theProton)            << 283     if( (theDef == G4Triton::Triton()) || (theDef == G4He3::He3() ) )
290       {                                        << 284     {
291         ceff2 = 0.149 + 7.091e-04*sig_pbarp +  << 285      ceff2 = 0.57 + 2.5e-4*sig_pbarp + 0.65 * std::exp(-0.02*sig_pbarp);
292       }                                        << 286     }
293       if(theTargetDef == theDeuteron)          << 287     if(theDef == theAlpha)
294       {                                        << 288     {
295         ceff2 = 0.57 + 2.5e-4*sig_pbarp + 0.65 << 289      ceff2 = 0.40 + 3.5e-4 *sig_pbarp + 0.45 * std::exp(-0.02*sig_pbarp);
296       }                                        << 290     }
297       if( (theTargetDef == G4Triton::Triton()) << 291    }
298       {                                        << 292 
299         ceff2 = 0.39 + 2.7e-4*sig_pbarp + 0.7  << 293    if( (theParticle ==theAHe3) || (theParticle ==theATriton) )
300       }                                        << 294    {
301       if(theTargetDef == theAlpha)             << 295     sig_pbarp = cs->GetAntiHadronNucleonTotCrSc(particle,energy/3.);
302       {                                        << 296     Ref2 = XstotalHad/10./2./pi ;
303         ceff2 = 0.24 + 3.5e-4*sig_pbarp + 0.75 << 297     if(Z>2)
304       }                                        << 298     {
305       if(Z>2)                                  << 299      ceff2 = 0.26 + 2.2e-4*sig_pbarp + 0.33*std::exp(-0.03*sig_pbarp);
306       {                                        << 300     }  
307         ceff2 = 0.26 + 2.2e-4*sig_pbarp + 0.33 << 301     if(theDef == theProton)
308       }                                        << 302     {
309     }                                          << 303      ceff2 = 0.149 + 7.091e-04*sig_pbarp + 0.3743*std::exp(-0.03*sig_pbarp);         
310                                                << 304     }
311     if ( (theParticle == theAAlpha) || (ceff2  << 305     if(theDef == theDeuteron)
312     {                                          << 306     {
313       if(theTargetDef == theProton)            << 307      ceff2 = 0.57 + 2.5e-4*sig_pbarp + 0.65 * std::exp(-0.02*sig_pbarp);
314       {                                        << 308     }
315         ceff2= 0.078 + 6.657e-4*sig_pbarp + 0. << 309     if( (theDef == G4Triton::Triton()) || (theDef == G4He3::He3() ) )
316       }                                        << 310     {
317       if(theTargetDef == theDeuteron)          << 311      ceff2 = 0.39 + 2.7e-4*sig_pbarp + 0.7 * std::exp(-0.02*sig_pbarp);
318       {                                        << 312     }
319         ceff2 = 0.40 + 3.5e-4 *sig_pbarp + 0.4 << 313     if(theDef == theAlpha)
320       }                                        << 314     {
321       if( (theTargetDef == G4Triton::Triton()) << 315      ceff2 = 0.24 + 3.5e-4*sig_pbarp + 0.75 * std::exp(-0.03*sig_pbarp);
322       {                                        << 316     }
323         ceff2 = 0.24 + 3.5e-4*sig_pbarp + 0.75 << 317    }
324       }                                        << 318 
325       if(theTargetDef == theAlpha)             << 319 
326       {                                        << 320    if (theParticle == theAAlpha)
327         ceff2 = 0.17 + 3.5e-4*sig_pbarp + 0.45 << 321    {
328       }                                        << 322     sig_pbarp = cs->GetAntiHadronNucleonTotCrSc(particle,energy/3.);
329       if(Z>2)                                  << 323     Ref2 = XstotalHad/10./2./pi ;
330       {                                        << 324     if(Z>2)
331         ceff2 = 0.22 + 2.0e-4*sig_pbarp + 0.2  << 325     {
332       }                                        << 326      ceff2 = 0.22 + 2.0e-4*sig_pbarp + 0.2 * std::exp(-0.03*sig_pbarp);
333     }                                          << 327     }
334                                                << 328     if(theDef == theProton)
335     fRef=std::sqrt(Ref2);                      << 329     {
336     fceff = std::sqrt(ceff2);                  << 330      ceff2= 0.078 + 6.657e-4*sig_pbarp + 0.3359*std::exp(-0.03*sig_pbarp);   
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     }                                             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; 
357                                                   349 
358     T= sqr(Q);                                 << 350  
359     T*=3.893913e+4;  // fm^(-2) -> MeV^2       << 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    }
360                                                   367 
361   }  // End of simulation of strong interactio << 368    G4double cosTet=1.0-T/(2.*ptot*ptot);
                                                   >> 369  
                                                   >> 370    fTetaCMS=std::acos(cosTet);
362                                                   371 
363   return T;                                    << 372    return T;
364 }                                                 373 }
365                                                   374 
366 //////////////////////////////////////////////    375 /////////////////////////////////////////////////////////////////////
367 //  Sample of Theta in CMS                        376 //  Sample of Theta in CMS
368  G4double G4AntiNuclElastic::SampleThetaCMS(co    377  G4double G4AntiNuclElastic::SampleThetaCMS(const G4ParticleDefinition* p, G4double plab,
369                                                   378                                                                          G4int Z, G4int A)
370 {                                                 379 { 
371   G4double T;                                     380   G4double T;
372   T =  SampleInvariantT( p, plab,  Z,  A);        381   T =  SampleInvariantT( p, plab,  Z,  A);
373                                                   382 
374    // NaN finder                                  383    // NaN finder
375   if(!(T < 0.0 || T >= 0.0))                      384   if(!(T < 0.0 || T >= 0.0))
376   {                                               385   {
377     if (verboseLevel > 0)                         386     if (verboseLevel > 0)
378     {                                             387     {
379       G4cout << "G4DiffuseElastic:WARNING: A =    388       G4cout << "G4DiffuseElastic:WARNING: A = " << A
380              << " mom(GeV)= " << plab/GeV         389              << " mom(GeV)= " << plab/GeV
381              << " S-wave will be sampled"         390              << " S-wave will be sampled"
382              << G4endl;                           391              << G4endl;
383     }                                             392     }
384     T = G4UniformRand()*fTmax;                    393     T = G4UniformRand()*fTmax;
385                                                   394  
386   }                                               395   }
387                                                   396 
388   if(fptot > 0.)                               << 397   if(fptot > 0.)                             // Uzhi 24 Nov. 2011
389   {                                               398   {
390    G4double cosTet=1.0-T/(2.*fptot*fptot);        399    G4double cosTet=1.0-T/(2.*fptot*fptot);
391    if(cosTet >  1.0 ) cosTet= 1.;              << 
392    if(cosTet < -1.0 ) cosTet=-1.;              << 
393    fTetaCMS=std::acos(cosTet);                    400    fTetaCMS=std::acos(cosTet); 
394    return fTetaCMS;                               401    return fTetaCMS;
395   } else                                       << 402   } else                                    // Uzhi 24 Nov. 2011
396   {                                            << 403   {                                         // Uzhi 24 Nov. 2011
397    return 2.*G4UniformRand()-1.;               << 404    return 2.*G4UniformRand()-1.;            // Uzhi 24 Nov. 2011
398   }                                            << 405   }                                         // Uzhi 24 Nov. 2011
399 }                                                 406 }  
400                                                   407 
401                                                   408 
402 //////////////////////////////////////////////    409 /////////////////////////////////////////////////////////////////////
403 //  Sample of Theta in Lab System                 410 //  Sample of Theta in Lab System
404  G4double G4AntiNuclElastic::SampleThetaLab(co    411  G4double G4AntiNuclElastic::SampleThetaLab(const G4ParticleDefinition* p, G4double plab,
405                                                   412                                                                          G4int Z, G4int A)
406 {                                                 413 { 
407   G4double T;                                     414   G4double T; 
408   T = SampleInvariantT( p, plab,  Z,  A);         415   T = SampleInvariantT( p, plab,  Z,  A);
409                                                   416 
410  // NaN finder                                    417  // NaN finder
411   if(!(T < 0.0 || T >= 0.0))                      418   if(!(T < 0.0 || T >= 0.0))
412   {                                               419   {
413     if (verboseLevel > 0)                         420     if (verboseLevel > 0)               
414     {                                             421     {
415       G4cout << "G4DiffuseElastic:WARNING: A =    422       G4cout << "G4DiffuseElastic:WARNING: A = " << A
416              << " mom(GeV)= " << plab/GeV         423              << " mom(GeV)= " << plab/GeV
417              << " S-wave will be sampled"         424              << " S-wave will be sampled"
418              << G4endl;                           425              << G4endl;
419     }                                             426     }
420     T = G4UniformRand()*fTmax;                    427     T = G4UniformRand()*fTmax;
421   }                                               428   }
422                                                   429 
423   G4double phi  = G4UniformRand()*twopi;          430   G4double phi  = G4UniformRand()*twopi;
424                                                   431 
425   G4double cost(1.);                              432   G4double cost(1.);
426   if(fTmax > 0.) {cost = 1. - 2.0*T/fTmax;}    << 433   if(fTmax > 0.) {cost = 1. - 2.0*T/fTmax;}             // Uzhi 24 Nov. 2011
427                                                   434 
428   G4double sint;                                  435   G4double sint;
429   if( cost >= 1.0 )                               436   if( cost >= 1.0 )
430   {                                               437   {
431     cost = 1.0;                                   438     cost = 1.0;
432     sint = 0.0;                                   439     sint = 0.0;
433   }                                               440   }
434   else if( cost <= -1.0)                          441   else if( cost <= -1.0)
435   {                                               442   {
436     cost = -1.0;                                  443     cost = -1.0;
437     sint =  0.0;                                  444     sint =  0.0;
438   }                                               445   }
439   else                                            446   else
440   {                                               447   {
441     sint = std::sqrt((1.0-cost)*(1.0+cost));      448     sint = std::sqrt((1.0-cost)*(1.0+cost));
442   }                                               449   }
443                                                   450 
444   G4double m1 = p->GetPDGMass();                  451   G4double m1 = p->GetPDGMass();
445   G4ThreeVector v(sint*std::cos(phi),sint*std:    452   G4ThreeVector v(sint*std::cos(phi),sint*std::sin(phi),cost);
446   v *= fptot;                                     453   v *= fptot;
447   G4LorentzVector nlv(v.x(),v.y(),v.z(),std::s    454   G4LorentzVector nlv(v.x(),v.y(),v.z(),std::sqrt(fptot*fptot + m1*m1));
448                                                   455    
449   nlv.boost(fbst);                                456   nlv.boost(fbst);
450                                                   457    
451   G4ThreeVector np = nlv.vect();                  458   G4ThreeVector np = nlv.vect();
452   G4double theta = np.theta();                    459   G4double theta = np.theta();
453   fThetaLab = theta;                              460   fThetaLab = theta; 
454                                                   461 
455   return theta;                                   462   return theta;
456 }                                                 463 }
457                                                   464 
458 //////////////////////////////////////////////    465 ////////////////////////////////////////////////////////////////////
459 //   Calculation of Damp factor                   466 //   Calculation of Damp factor
460  G4double G4AntiNuclElastic::DampFactor(G4doub    467  G4double G4AntiNuclElastic::DampFactor(G4double x)
461 {                                                 468 {
462    G4double df;                                   469    G4double df;
463    G4double  f3 = 6.; // first factorials         470    G4double  f3 = 6.; // first factorials
464                                                   471 
465  if( std::fabs(x) < 0.01 )                        472  if( std::fabs(x) < 0.01 )
466   {                                               473   { 
467       df=1./(1.+x*x/f3);                          474       df=1./(1.+x*x/f3); 
468  }                                                475  }
469   else                                            476   else
470   {                                               477   {
471     df = x/std::sinh(x);                          478     df = x/std::sinh(x); 
472   }                                               479   }
473   return df;                                      480   return df;
474 }                                                 481 }
475                                                   482 
476                                                   483 
477 //////////////////////////////////////////////    484 /////////////////////////////////////////////////////////////////////////////////
478 //  Calculation of particle velocity Beta         485 //  Calculation of particle velocity Beta
479                                                   486 
480  G4double G4AntiNuclElastic::CalculateParticle    487  G4double G4AntiNuclElastic::CalculateParticleBeta( const G4ParticleDefinition* particle, 
481                                   G4double mom    488                                   G4double momentum    )
482 {                                                 489 {
483   G4double mass = particle->GetPDGMass();         490   G4double mass = particle->GetPDGMass();
484   G4double a    = momentum/mass;                  491   G4double a    = momentum/mass;
485   fBeta         = a/std::sqrt(1+a*a);             492   fBeta         = a/std::sqrt(1+a*a);
486                                                   493 
487   return fBeta;                                   494   return fBeta; 
488 }                                                 495 }
489                                                   496 
490                                                   497 
491 //////////////////////////////////////////////    498 ///////////////////////////////////////////////////////////////////////////////////
492 //   Calculation of parameter Zommerfeld          499 //   Calculation of parameter Zommerfeld
493                                                   500 
494  G4double G4AntiNuclElastic::CalculateZommerfe    501  G4double G4AntiNuclElastic::CalculateZommerfeld( G4double beta, G4double Z1, G4double Z2 )
495 {                                                 502 {
496   fZommerfeld = fine_structure_const*Z1*Z2/bet    503   fZommerfeld = fine_structure_const*Z1*Z2/beta;
497                                                   504 
498   return fZommerfeld;                             505   return fZommerfeld; 
499 }                                                 506 }
500                                                   507 
501 //////////////////////////////////////////////    508 ////////////////////////////////////////////////////////////////////////////////////
502 //                                                509 //  
503 G4double G4AntiNuclElastic::CalculateAm( G4dou    510 G4double G4AntiNuclElastic::CalculateAm( G4double momentum, G4double n, G4double Z)
504 {                                                 511 {
505   G4double k   = momentum/hbarc;                  512   G4double k   = momentum/hbarc;
506   G4double ch  = 1.13 + 3.76*n*n;                 513   G4double ch  = 1.13 + 3.76*n*n;
507   G4double zn  = 1.77*k/G4Pow::GetInstance()->    514   G4double zn  = 1.77*k/G4Pow::GetInstance()->A13(Z)*Bohr_radius; 
508   G4double zn2 = zn*zn;                           515   G4double zn2 = zn*zn;
509   fAm          = ch/zn2;                          516   fAm          = ch/zn2;
510                                                   517 
511   return fAm;                                     518   return fAm;
512 }                                                 519 }
513                                                   520 
514 //////////////////////////////////////////////    521 /////////////////////////////////////////////////////////////
515 //                                                522 //
516 // Bessel J0 function based on rational approx    523 // Bessel J0 function based on rational approximation from
517 // J.F. Hart, Computer Approximations, New Yor    524 // J.F. Hart, Computer Approximations, New York, Willey 1968, p. 141
518                                                   525    
519 G4double G4AntiNuclElastic::BesselJzero(G4doub    526 G4double G4AntiNuclElastic::BesselJzero(G4double value)
520 {                                                 527 {  
521   G4double modvalue, value2, fact1, fact2, arg    528   G4double modvalue, value2, fact1, fact2, arg, shift, bessel;
522                                                   529 
523   modvalue = std::fabs(value);                    530   modvalue = std::fabs(value);
524                                                   531 
525   if ( value < 8.0 && value > -8.0 )              532   if ( value < 8.0 && value > -8.0 )
526   {                                               533   {
527     value2 = value*value;                         534     value2 = value*value;
528                                                   535                  
529     fact1  = 57568490574.0 + value2*(-13362590    536     fact1  = 57568490574.0 + value2*(-13362590354.0
530                            + value2*( 65161964    537                            + value2*( 651619640.7  
531                            + value2*(-11214424    538                            + value2*(-11214424.18
532                            + value2*( 77392.33    539                            + value2*( 77392.33017
533                            + value2*(-184.9052    540                            + value2*(-184.9052456   ) ) ) ) );
534                                                   541                               
535     fact2  = 57568490411.0 + value2*( 10295329    542     fact2  = 57568490411.0 + value2*( 1029532985.0
536                            + value2*( 9494680.    543                            + value2*( 9494680.718
537                            + value2*(59272.648    544                            + value2*(59272.64853
538                            + value2*(267.85327    545                            + value2*(267.8532712
539                            + value2*1.0           546                            + value2*1.0               ) ) ) );
540                                                   547  
541     bessel = fact1/fact2;                         548     bessel = fact1/fact2;
542   }                                               549   }
543   else                                            550   else
544   {                                               551   {
545     arg    = 8.0/modvalue;                        552     arg    = 8.0/modvalue;
546                                                   553 
547     value2 = arg*arg;                             554     value2 = arg*arg;
548                                                   555  
549     shift  = modvalue-0.785398164;                556     shift  = modvalue-0.785398164;
550                                                   557 
551     fact1  = 1.0 + value2*(-0.1098628627e-2       558     fact1  = 1.0 + value2*(-0.1098628627e-2
552                  + value2*(0.2734510407e-4        559                  + value2*(0.2734510407e-4
553                  + value2*(-0.2073370639e-5       560                  + value2*(-0.2073370639e-5
554                  + value2*0.2093887211e-6    )    561                  + value2*0.2093887211e-6    ) ) );
555   fact2  = -0.1562499995e-1 + value2*(0.143048    562   fact2  = -0.1562499995e-1 + value2*(0.1430488765e-3
556                               + value2*(-0.691    563                               + value2*(-0.6911147651e-5
557                               + value2*(0.7621    564                               + value2*(0.7621095161e-6
558                               - value2*0.93494    565                               - value2*0.934945152e-7    ) ) );
559                                                   566 
560     bessel = std::sqrt(0.636619772/modvalue)*(    567     bessel = std::sqrt(0.636619772/modvalue)*(std::cos(shift)*fact1 - arg*std::sin(shift)*fact2);
561   }                                               568   }
562   return bessel;                                  569   return bessel;
563 }                                                 570 }
564                                                   571 
565                                                   572 
566 //////////////////////////////////////////////    573 //////////////////////////////////////////////////////////////////////////////
567 // Bessel J1 function based on rational approx    574 // Bessel J1 function based on rational approximation from
568 // J.F. Hart, Computer Approximations, New Yor    575 // J.F. Hart, Computer Approximations, New York, Willey 1968, p. 141
569                                                   576     
570  G4double G4AntiNuclElastic::BesselJone(G4doub    577  G4double G4AntiNuclElastic::BesselJone(G4double value)
571 {                                                 578 {
572   G4double modvalue, value2, fact1, fact2, arg    579   G4double modvalue, value2, fact1, fact2, arg, shift, bessel;
573                                                   580                           
574   modvalue = std::fabs(value);                    581   modvalue = std::fabs(value);
575                                                   582                  
576   if ( modvalue < 8.0 )                           583   if ( modvalue < 8.0 )
577   {                                               584   {
578     value2 = value*value;                         585     value2 = value*value;
579     fact1  = value*(72362614232.0 + value2*(-7    586     fact1  = value*(72362614232.0 + value2*(-7895059235.0
580                                   + value2*( 2    587                                   + value2*( 242396853.1
581                                   + value2*(-2    588                                   + value2*(-2972611.439
582                                   + value2*( 1    589                                   + value2*( 15704.48260
583                                   + value2*(-3    590                                   + value2*(-30.16036606  ) ) ) ) ) );
584                                                   591     
585     fact2  = 144725228442.0 + value2*(23005351    592     fact2  = 144725228442.0 + value2*(2300535178.0
586                             + value2*(18583304    593                             + value2*(18583304.74
587                             + value2*(99447.43    594                             + value2*(99447.43394
588                             + value2*(376.9991    595                             + value2*(376.9991397
589                             + value2*1.0          596                             + value2*1.0             ) ) ) );
590     bessel = fact1/fact2;                         597     bessel = fact1/fact2;
591   }                                               598   }
592   else                                            599   else
593   {                                               600   {
594     arg    = 8.0/modvalue;                        601     arg    = 8.0/modvalue;  
595   value2 = arg*arg;                               602   value2 = arg*arg;
596                                                   603 
597     shift  = modvalue - 2.356194491;              604     shift  = modvalue - 2.356194491;
598                                                   605 
599     fact1  = 1.0 + value2*( 0.183105e-2           606     fact1  = 1.0 + value2*( 0.183105e-2
600                  + value2*(-0.3516396496e-4       607                  + value2*(-0.3516396496e-4
601                  + value2*(0.2457520174e-5        608                  + value2*(0.2457520174e-5
602                  + value2*(-0.240337019e-6        609                  + value2*(-0.240337019e-6          ) ) ) );
603                                                   610 
604     fact2 = 0.04687499995 + value2*(-0.2002690    611     fact2 = 0.04687499995 + value2*(-0.2002690873e-3
605                           + value2*( 0.8449199    612                           + value2*( 0.8449199096e-5
606                           + value2*(-0.8822898    613                           + value2*(-0.88228987e-6
607                           + value2*0.105787412    614                           + value2*0.105787412e-6       ) ) );
608                                                   615 
609     bessel = std::sqrt( 0.636619772/modvalue)*    616     bessel = std::sqrt( 0.636619772/modvalue)*(std::cos(shift)*fact1 - arg*std::sin(shift)*fact2);
610     if (value < 0.0) bessel = -bessel;            617     if (value < 0.0) bessel = -bessel;
611   }                                               618   }
612   return bessel;                                  619   return bessel;
613 }                                                 620 }
614                                                   621 
615 //////////////////////////////////////////////    622 ////////////////////////////////////////////////////////////////////////////////
616 // return J1(x)/x with special case for small     623 // return J1(x)/x with special case for small x 
617 G4double G4AntiNuclElastic::BesselOneByArg(G4d    624 G4double G4AntiNuclElastic::BesselOneByArg(G4double x)
618 {                                                 625 {
619   G4double x2, result;                            626   G4double x2, result;
620                                                   627  
621   if( std::fabs(x) < 0.01 )                       628   if( std::fabs(x) < 0.01 )
622   {                                               629   {
623    x  *= 0.5;                                     630    x  *= 0.5;
624    x2 = x*x;                                      631    x2 = x*x;
625    result = (2.- x2 + x2*x2/6.)/4.;               632    result = (2.- x2 + x2*x2/6.)/4.;
626   }                                               633   }
627   else                                            634   else
628   {                                               635   {
629     result = BesselJone(x)/x;                     636     result = BesselJone(x)/x;
630   }                                               637   }
631   return result;                                  638   return result;
632 }                                                 639 } 
633                                                   640 
634 //////////////////////////////////////////////    641 /////////////////////////////////////////////////////////////////////////////////
635 // return  angle from which Coulomb scattering    642 // return  angle from which Coulomb scattering is calculated 
636 G4double G4AntiNuclElastic::GetcosTeta1(G4doub    643 G4double G4AntiNuclElastic::GetcosTeta1(G4double plab, G4int A)
637 {                                                 644 {
638                                                   645 
639 // G4double p0 =G4LossTableManager::Instance()    646 // G4double p0 =G4LossTableManager::Instance()->FactorForAngleLimit()*CLHEP::hbarc/CLHEP::fermi;
640   G4double p0 = 1.*hbarc/fermi;                   647   G4double p0 = 1.*hbarc/fermi;
641 //G4double cteta1 = 1.0 - p0*p0/2.0 * pow(A,2.    648 //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    649   G4double cteta1 = 1.0 - p0*p0/2.0 * G4Pow::GetInstance()->Z23(A)/(plab*plab);
643 //////////////////                                650 //////////////////
644   if(cteta1 < -1.) cteta1 = -1.0;                 651   if(cteta1 < -1.) cteta1 = -1.0;
645   return cteta1;                                  652   return cteta1;
646 }                                                 653 }
647                                                   654 
648                                                   655 
649                                                   656 
650                                                   657 
651                                                   658 
652                                                   659 
653                                                   660 
654                                                   661