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Geant4/processes/electromagnetic/utils/src/G4ionEffectiveCharge.cc

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Differences between /processes/electromagnetic/utils/src/G4ionEffectiveCharge.cc (Version 11.3.0) and /processes/electromagnetic/utils/src/G4ionEffectiveCharge.cc (Version 9.2.p4)


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 25 //                                             <<  25 //
 26 //                                             <<  26 // $Id: G4ionEffectiveCharge.cc,v 1.24.2.1 2010/01/26 14:33:54 gcosmo Exp $
 27 // ------------------------------------------- <<  27 // GEANT4 tag $Name: geant4-09-02-patch-04 $
 28 //                                             <<  28 //
 29 // GEANT4 Class file                           <<  29 // -------------------------------------------------------------------
 30 //                                             <<  30 //
 31 //                                             <<  31 // GEANT4 Class file
 32 // File name:     G4ionEffectiveCharge         <<  32 //
 33 //                                             <<  33 //
 34 // Author:        Vladimir Ivanchenko          <<  34 // File name:     G4ionEffectiveCharge
 35 //                                             <<  35 //
 36 // Creation date: 07.05.2002                   <<  36 // Author:        Vladimir Ivanchenko
 37 //                                             <<  37 //
 38 // Modifications:                              <<  38 // Creation date: 07.05.2002
 39 // 12.09.2004 Set low energy limit to 1 keV (V <<  39 //
 40 // 25.01.2005 Add protection - min Charge 0.1  <<  40 // Modifications:
 41 // 28.04.2006 Set upper energy limit to 50 MeV <<  41 // 12.09.2004 Set low energy limit to 1 keV (V.Ivanchenko) 
 42 // 23.05.2006 Set upper energy limit to Z*10 M <<  42 // 25.01.2005 Add protection - min Charge 0.1 eplus (V.Ivanchenko) 
 43 // 15.08.2006 Add protection for not defined m <<  43 // 28.04.2006 Set upper energy limit to 50 MeV (V.Ivanchenko) 
 44 // 27-09-2007 Use Fermi energy from material,  <<  44 // 23.05.2006 Set upper energy limit to Z*10 MeV (V.Ivanchenko) 
 45 //                                             <<  45 // 15.08.2006 Add protection for not defined material (V.Ivanchenko) 
 46                                                <<  46 // 27-09-2007 Use Fermi energy from material, optimazed formulas (V.Ivanchenko)
 47 // ------------------------------------------- <<  47 //
 48 //                                             <<  48 
 49 //....oooOO0OOooo........oooOO0OOooo........oo <<  49 // -------------------------------------------------------------------
 50 //....oooOO0OOooo........oooOO0OOooo........oo <<  50 //
 51                                                <<  51 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 52 #include "G4ionEffectiveCharge.hh"             <<  52 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 53 #include "G4PhysicalConstants.hh"              <<  53 
 54 #include "G4SystemOfUnits.hh"                  <<  54 #include "G4ionEffectiveCharge.hh"
 55 #include "G4UnitsTable.hh"                     <<  55 #include "G4UnitsTable.hh"
 56 #include "G4Material.hh"                       <<  56 #include "G4Material.hh"
 57 #include "G4NistManager.hh"                    <<  57 #include "G4NistManager.hh"
 58 #include "G4Log.hh"                            <<  58 
 59 #include "G4Exp.hh"                            <<  59 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 60 #include "G4Pow.hh"                            <<  60 
 61                                                <<  61 G4ionEffectiveCharge::G4ionEffectiveCharge()
 62 //....oooOO0OOooo........oooOO0OOooo........oo <<  62 {
 63                                                <<  63   chargeCorrection = 1.0;
 64 G4ionEffectiveCharge::G4ionEffectiveCharge()   <<  64   energyHighLimit  = 20.0*MeV;
 65 {                                              <<  65   energyLowLimit   = 1.0*keV;
 66   chargeCorrection = 1.0;                      <<  66   energyBohr       = 25.*keV;
 67   energyHighLimit  = 20.0*CLHEP::MeV;          <<  67   massFactor       = amu_c2/(proton_mass_c2*keV);
 68   energyLowLimit   = 1.0*CLHEP::keV;           <<  68   minCharge        = 1.0;
 69   energyBohr       = 25.*CLHEP::keV;           <<  69   lastPart         = 0;
 70   massFactor       = CLHEP::amu_c2/(CLHEP::pro <<  70   lastMat          = 0;
 71   minCharge        = 1.0;                      <<  71   lastKinEnergy    = 0.0;
 72   lastKinEnergy    = 0.0;                      <<  72   effCharge        = eplus;
 73   effCharge        = CLHEP::eplus;             <<  73   nist = G4NistManager::Instance();
 74   inveplus         = 1.0/CLHEP::eplus;         <<  74 }
 75   g4calc = G4Pow::GetInstance();               <<  75 
 76 }                                              <<  76 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 77                                                <<  77 
 78 //....oooOO0OOooo........oooOO0OOooo........oo <<  78 G4ionEffectiveCharge::~G4ionEffectiveCharge()
 79                                                <<  79 {}
 80 G4double G4ionEffectiveCharge::EffectiveCharge <<  80 
 81                                                <<  81 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 82                                                <<  82 
 83 {                                              <<  83 G4double G4ionEffectiveCharge::EffectiveCharge(const G4ParticleDefinition* p,
 84   if(p == lastPart && material == lastMat && k <<  84                                                const G4Material* material,
 85     return effCharge;                          <<  85                  G4double kineticEnergy)
 86                                                <<  86 {
 87   lastPart      = p;                           <<  87   if(p == lastPart && material == lastMat && kineticEnergy == lastKinEnergy)
 88   lastMat       = material;                    <<  88     return effCharge;
 89   lastKinEnergy = kineticEnergy;               <<  89 
 90                                                <<  90   lastPart      = p;
 91   G4double mass = p->GetPDGMass();             <<  91   lastMat       = material;
 92   effCharge = p->GetPDGCharge();               <<  92   lastKinEnergy = kineticEnergy;
 93   G4int Zi = G4lrint(effCharge*inveplus);      <<  93 
 94   chargeCorrection = 1.0;                      <<  94   G4double mass   = p->GetPDGMass();
 95   if(Zi <= 1) { return effCharge; }            <<  95   G4double charge = p->GetPDGCharge();
 96                                                <<  96   G4double Zi     = charge/eplus;
 97   // The aproximation of ion effective charge  <<  97 
 98   // J.F.Ziegler, J.P. Biersack, U. Littmark   <<  98   chargeCorrection = 1.0;
 99   // The Stopping and Range of Ions in Matter, <<  99   effCharge = charge;
100   // Vol.1, Pergamon Press, 1985               << 100 
101   // Fast ions or hadrons                      << 101   // The aproximation of ion effective charge from:
102   G4double reducedEnergy = kineticEnergy * CLH << 102   // J.F.Ziegler, J.P. Biersack, U. Littmark
103                                                << 103   // The Stopping and Range of Ions in Matter,
104   //G4cout << "e= " << reducedEnergy << " Zi=  << 104   // Vol.1, Pergamon Press, 1985
105   //<< material->GetName() << G4endl;          << 105   // Fast ions or hadrons
106                                                << 106   G4double reducedEnergy = kineticEnergy * proton_mass_c2/mass ;
107   if(reducedEnergy > effCharge*energyHighLimit << 107 
108     return effCharge;                          << 108   //G4cout << "e= " << reducedEnergy << " Zi= " << Zi << "  " << material->GetName() << G4endl;
109   }                                            << 109 
110   G4double z = material->GetIonisation()->GetZ << 110   if( reducedEnergy > Zi*energyHighLimit || Zi < 1.5 || !material) return charge;
111   reducedEnergy = std::max(reducedEnergy,energ << 111 
112                                                << 112   G4double z    = material->GetIonisation()->GetZeffective();
113   // Helium ion case                           << 113   reducedEnergy = std::max(reducedEnergy,energyLowLimit);
114   if( Zi <= 2 ) {                              << 114 
115                                                << 115   // Helium ion case
116     static const G4double c[6] =               << 116   if( Zi < 2.5 ) {
117       {0.2865,0.1266,-0.001429,0.02402,-0.0113 << 117 
118                                                << 118     static G4double c[6] = {0.2865,  0.1266, -0.001429,
119     G4double Q = std::max(0.0,G4Log(reducedEne << 119           0.02402,-0.01135, 0.001475} ;
120     G4double x = c[0];                         << 120 
121     G4double y = 1.0;                          << 121     G4double Q = std::max(0.0,std::log(reducedEnergy*massFactor));
122     for (G4int i=1; i<6; ++i) {                << 122     G4double x = c[0];
123       y *= Q;                                  << 123     G4double y = 1.0;
124       x += y * c[i] ;                          << 124     for (G4int i=1; i<6; i++) {
125     }                                          << 125       y *= Q;
126     G4double ex = (x < 0.2) ? x * (1 - 0.5*x)  << 126       x += y * c[i] ;
127                                                << 127     }
128     G4double tq = 7.6 - Q;                     << 128     G4double ex;
129     G4double tq2= tq*tq;                       << 129     if(x < 0.2) ex = x * (1 - 0.5*x);
130     G4double tt = ( 0.007 + 0.00005 * z );     << 130     else        ex = 1. - std::exp(-x);
131     if(tq2 < 0.2) { tt *= (1.0 - tq2 + 0.5*tq2 << 131 
132     else          { tt *= G4Exp(-tq2); }       << 132     G4double tq = 7.6 - Q;
133                                                << 133     G4double tq2= tq*tq;
134     effCharge *= (1.0 + tt) * std::sqrt(ex);   << 134     G4double tt = ( 0.007 + 0.00005 * z );
135                                                << 135     if(tq2 < 0.2) tt *= (1.0 - tq2 + 0.5*tq2*tq2);
136     // Heavy ion case                          << 136     else          tt *= std::exp(-tq2);
137   } else {                                     << 137 
138                                                << 138     effCharge = charge*(1.0 + tt) * std::sqrt(ex);
139     G4double zi13 = g4calc->Z13(Zi);           << 139 
140     G4double zi23 = zi13*zi13;                 << 140     // Heavy ion case
141                                                << 141   } else {
142     // v1 is ion velocity in vF unit           << 142     
143     G4double eF   = material->GetIonisation()- << 143     G4double y;
144     G4double v1sq = reducedEnergy/eF;          << 144     //    = nist->GetZ13(z);
145     G4double vFsq = eF/energyBohr;             << 145     //G4double z23  = y*y;
146     G4double vF = std::sqrt(vFsq);             << 146     G4double zi13 = nist->GetZ13(Zi);
147                                                << 147     G4double zi23 = zi13*zi13;
148     G4double y = ( v1sq > 1.0 )                << 148     //    G4double e = std::max(reducedEnergy,energyBohr/z23);
149       // Faster than Fermi velocity            << 149     //G4double e = reducedEnergy;
150       ? vF * std::sqrt(v1sq) * ( 1.0 + 0.2/v1s << 150 
151       // Slower than Fermi velocity            << 151     // v1 is ion velocity in vF unit
152       : 0.692308 * vF * (1.0 + 0.666666*v1sq + << 152     G4double eF   = material->GetIonisation()->GetFermiEnergy();
153                                                << 153     G4double v1sq = reducedEnergy/eF;
154     G4double y3 = G4Exp(0.3*G4Log(y));         << 154     G4double vFsq = eF/energyBohr;
155     // G4cout<<"y= "<<y<<" y3= "<<y3<<" v1= "< << 155     G4double vF   = std::sqrt(eF/energyBohr);
156     G4double q = std::max(1.0 - G4Exp( 0.803*y << 156 
157                                      - 0.00898 << 157     // Faster than Fermi velocity
158                                                << 158     if ( v1sq > 1.0 ) {
159     // compute charge correction               << 159       y = vF * std::sqrt(v1sq) * ( 1.0 + 0.2/v1sq ) / zi23 ;
160     G4double tq = 7.6 - G4Log(reducedEnergy/CL << 160 
161     G4double tq2= tq*tq;                       << 161       // Slower than Fermi velocity
162     G4double sq = 1.0 + ( 0.18 + 0.0015 * z )* << 162     } else {
163     //    G4cout << "sq= " << sq << G4endl;    << 163       y = 0.692308 * vF * (1.0 + 0.666666*v1sq + v1sq*v1sq/15.0) / zi23 ;
164                                                << 164     }
165     // Screen length according to              << 165 
166     // J.F.Ziegler and J.M.Manoyan, The stoppi << 166     G4double q;
167     // Nucl. Inst. & Meth. in Phys. Res. B35 ( << 167     G4double y3 = std::pow(y, 0.3) ;
168                                                << 168     // G4cout<<"y= "<<y<<" y3= "<<y3<<" v1= "<<v1<<" vF= "<<vF<<G4endl; 
169     G4double lambda = 10.0 * vF *g4calc->A23(1 << 169     q = 1.0 - std::exp( 0.803*y3 - 1.3167*y3*y3 - 0.38157*y - 0.008983*y*y ) ;
170     G4double lambda2 = lambda*lambda;          << 170     
171     G4double xx = (0.5/q - 0.5)*G4Log(1.0 + la << 171     //y *= 0.77;
172                                                << 172     //y *= (0.75 + 0.52/Zi);
173     effCharge *= q;                            << 173 
174     chargeCorrection = sq * (1.0 + xx);        << 174     //if( y < 0.2 ) q = y*(1.0 - 0.5*y);
175   }                                            << 175     //else          q = 1.0 - std::exp(-y);
176   //  G4cout << "G4ionEffectiveCharge: charge= << 176 
177   //         << " chargeCor= " << chargeCorrec << 177     G4double qmin = minCharge/Zi;
178   //           << " e(MeV)= " << kineticEnergy << 178     if(q < qmin) q = qmin;
179   return effCharge;                            << 179   
180 }                                              << 180     effCharge = q*charge;
181                                                << 181 
182 //....oooOO0OOooo........oooOO0OOooo........oo << 182     /*
                                                   >> 183     G4double x1 = 1.0*effCharge*(1.0 - 0.132*std::log(y))/(y*std::sqrt(z));
                                                   >> 184     G4double x2 = 0.1*effCharge*effCharge*energyBohr/reducedEnergy;
                                                   >> 185 
                                                   >> 186     chargeCorrection = 1.0 + x1 - x2;
                                                   >> 187 
                                                   >> 188     G4cout << "x1= "<<x1<<" x2= "<< x2<<" corr= "<<chargeCorrection<<G4endl;
                                                   >> 189     */
                                                   >> 190     
                                                   >> 191     G4double tq = 7.6 - std::log(reducedEnergy/keV);
                                                   >> 192     G4double tq2= tq*tq;
                                                   >> 193     G4double sq = ( 0.18 + 0.0015 * z ) / (Zi*Zi);
                                                   >> 194     if(tq2 < 0.2) sq *= (1.0 - tq2 + 0.5*tq2*tq2);
                                                   >> 195     else          sq *= std::exp(-tq2);
                                                   >> 196     sq += 1.0;
                                                   >> 197     //    G4cout << "sq= " << sq << G4endl;
                                                   >> 198 
                                                   >> 199     // Screen length according to
                                                   >> 200     // J.F.Ziegler and J.M.Manoyan, The stopping of ions in compaunds,
                                                   >> 201     // Nucl. Inst. & Meth. in Phys. Res. B35 (1988) 215-228.
                                                   >> 202 
                                                   >> 203     G4double lambda = 10.0 * vF / (zi13 * (6.0 + q));
                                                   >> 204     if(q < 0.2) lambda *= (1.0 - 0.66666667*q - q*q/9.0);
                                                   >> 205     else        lambda *= std::pow(1.0-q, 0.666666);
                                                   >> 206 
                                                   >> 207     G4double lambda2 = lambda*lambda;
                                                   >> 208 
                                                   >> 209     G4double xx = (0.5/q - 0.5)/vFsq;
                                                   >> 210     if(lambda2 < 0.2) xx *= lambda2*(1.0 - 0.5*lambda2);
                                                   >> 211     else              xx *= std::log(1.0 + lambda2); 
                                                   >> 212 
                                                   >> 213     chargeCorrection = sq * (1.0 + xx);
                                                   >> 214     
                                                   >> 215   }
                                                   >> 216   //  G4cout << "G4ionEffectiveCharge: charge= " << charge << " q= " << q 
                                                   >> 217   //         << " chargeCor= " << chargeCorrection 
                                                   >> 218   //     << " e(MeV)= " << kineticEnergy/MeV << G4endl;
                                                   >> 219   return effCharge;
                                                   >> 220 }
                                                   >> 221 
                                                   >> 222 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
                                                   >> 223 
                                                   >> 224 
183                                                   225