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Geant4/processes/cuts/src/G4RToEConvForPositron.cc

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Differences between /processes/cuts/src/G4RToEConvForPositron.cc (Version 11.3.0) and /processes/cuts/src/G4RToEConvForPositron.cc (Version 10.6.p3)


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 25 //                                                 25 //
 26 // G4RToEConvForPositron class implementation  << 
 27 //                                                 26 //
 28 // Author: H.Kurashige, 05 October 2002 - Firs <<  27 //
 29 // ------------------------------------------- <<  28 //
                                                   >>  29 // --------------------------------------------------------------
                                                   >>  30 //      GEANT 4 class implementation file/  History:
                                                   >>  31 //    5 Oct. 2002, H.Kuirashige : Structure created based on object model
                                                   >>  32 // --------------------------------------------------------------
 30                                                    33 
 31 #include "G4RToEConvForPositron.hh"                34 #include "G4RToEConvForPositron.hh"
 32 #include "G4ParticleDefinition.hh"                 35 #include "G4ParticleDefinition.hh"
 33 #include "G4ParticleTable.hh"                      36 #include "G4ParticleTable.hh"
                                                   >>  37 #include "G4Material.hh"
                                                   >>  38 #include "G4PhysicsLogVector.hh"
 34                                                    39 
                                                   >>  40 #include "G4ios.hh"
 35 #include "G4PhysicalConstants.hh"                  41 #include "G4PhysicalConstants.hh"
 36 #include "G4SystemOfUnits.hh"                      42 #include "G4SystemOfUnits.hh"
 37 #include "G4Pow.hh"                            << 
 38 #include "G4Log.hh"                            << 
 39 #include "G4Exp.hh"                            << 
 40                                                    43 
 41 // ------------------------------------------- << 
 42 G4RToEConvForPositron::G4RToEConvForPositron()     44 G4RToEConvForPositron::G4RToEConvForPositron() 
 43   : G4VRangeToEnergyConverter()                <<  45   : G4VRangeToEnergyConverter(),
                                                   >>  46     Mass(0.0),
                                                   >>  47     Z(-1.),  
                                                   >>  48     taul(0.0),
                                                   >>  49     ionpot(0.0),
                                                   >>  50     ionpotlog(-1.0e-10),
                                                   >>  51     bremfactor(0.1)
 44 {                                                  52 {    
 45   theParticle = G4ParticleTable::GetParticleTa <<  53   theParticle =  G4ParticleTable::GetParticleTable()->FindParticle("e+");
 46   if (theParticle == nullptr)                  <<  54   if (theParticle ==0) {
 47   {                                            << 
 48 #ifdef G4VERBOSE                                   55 #ifdef G4VERBOSE
 49     if (GetVerboseLevel()>0)                   <<  56     if (GetVerboseLevel()>0) {
 50     {                                          <<  57       G4cout << " G4RToEConvForPositron::G4RToEConvForPositron() ";
 51       G4cout << "G4RToEConvForPositron::G4RToE <<  58       G4cout << " Positron is not defined !!" << G4endl;
 52       G4cout << "Positron is not defined !!" < << 
 53     }                                              59     }
 54 #endif                                             60 #endif
                                                   >>  61   } else {
                                                   >>  62     Mass = theParticle->GetPDGMass();
 55   }                                                63   }
 56   else                                         << 
 57   {                                            << 
 58     fPDG = theParticle->GetPDGEncoding();      << 
 59   }                                            << 
 60 }                                                  64 }
 61                                                    65 
 62 // ------------------------------------------- <<  66 G4RToEConvForPositron::~G4RToEConvForPositron()
 63 G4RToEConvForPositron::~G4RToEConvForPositron( <<  67 { 
 64 {}                                             <<  68 }
 65                                                <<  69 
 66 // ------------------------------------------- <<  70 
 67 G4double G4RToEConvForPositron::ComputeValue(c <<  71 
 68                                              c <<  72 
                                                   >>  73 // **********************************************************************
                                                   >>  74 // ************************* ComputeLoss ********************************
                                                   >>  75 // **********************************************************************
                                                   >>  76 G4double G4RToEConvForPositron::ComputeLoss(G4double AtomicNumber,
                                                   >>  77               G4double KineticEnergy) 
 69 {                                                  78 {
 70   const G4double cbr1=0.02, cbr2=-5.7e-5, cbr3 <<  79   const  G4double cbr1=0.02, cbr2=-5.7e-5, cbr3=1., cbr4=0.072;
 71   const G4double Tlow=10.*CLHEP::keV, Thigh=1. <<  80   const  G4double Tlow=10.*keV, Thigh=1.*GeV;
 72   const G4double taul = Tlow/CLHEP::electron_m << 
 73   const G4double logtaul = G4Log(taul);        << 
 74   const G4double taul12 = std::sqrt(taul);     << 
 75   const G4double bremfactor = 0.1;             << 
 76                                                << 
 77   G4double Zlog = G4Pow::GetInstance()->logZ(Z << 
 78   G4double ionpot =                            << 
 79     1.6e-5*CLHEP::MeV*G4Exp(0.9*Zlog)/CLHEP::e << 
 80   G4double ionpotlog = G4Log(ionpot);          << 
 81                                                    81 
 82   G4double tau = kinEnergy/CLHEP::electron_mas <<  82   //  calculate dE/dx for electrons
 83   G4double dEdx = 0.0;                         <<  83   if( std::fabs(AtomicNumber-Z)>0.1 ) {
                                                   >>  84     Z = AtomicNumber;
                                                   >>  85     taul = Tlow/Mass;
                                                   >>  86     ionpot = 1.6e-5*MeV*std::exp(0.9*std::log(Z))/Mass;
                                                   >>  87     ionpotlog = std::log(ionpot);
                                                   >>  88   } 
 84                                                    89 
                                                   >>  90   G4double tau = KineticEnergy/Mass;
                                                   >>  91   G4double dEdx;
 85                                                    92 
 86   if(tau<taul)                                 <<  93  if(tau<taul)
 87   {                                                94   {
 88     G4double t1 = taul+1.;                         95     G4double t1 = taul+1.;
 89     G4double t2 = taul+2.;                         96     G4double t2 = taul+2.;
 90     G4double tsq = taul*taul;                      97     G4double tsq = taul*taul;
 91     G4double beta2 = taul*t2/(t1*t1);              98     G4double beta2 = taul*t2/(t1*t1);
 92     G4double f = 2.*logtaul -                  <<  99     G4double     f = 2.*std::log(taul)
 93       (6.*taul+1.5*tsq-taul*(1.-tsq/3.)/t2     << 100                      -(6.*taul+1.5*tsq-taul*(1.-tsq/3.)/t2-tsq*(0.5-tsq/12.)/
 94        -tsq*(0.5-tsq/12.)/(t2*t2))/(t1*t1);    << 101                        (t2*t2))/(t1*t1);
 95     dEdx = (G4Log(2.*taul+4.)-2.*ionpotlog+f)/ << 102     dEdx = (std::log(2.*taul+4.)-2.*ionpotlog+f)/beta2;
 96     dEdx *= Z*taul12/std::sqrt(tau);           << 103     dEdx = twopi_mc2_rcl2*Z*dEdx;
 97   }                                            << 104     G4double clow = dEdx*std::sqrt(taul);
 98   else                                         << 105     dEdx = clow/std::sqrt(KineticEnergy/Mass);
 99   {                                            << 106 
100     G4double t1 = tau+1.;                      << 107   } else {
                                                   >> 108    G4double t1 = tau+1.;
101     G4double t2 = tau+2.;                         109     G4double t2 = tau+2.;
102     G4double tsq = tau*tau;                       110     G4double tsq = tau*tau;
103     G4double beta2 = tau*t2/(t1*t1);              111     G4double beta2 = tau*t2/(t1*t1);
104     G4double f = 2.*G4Log(tau) - (6.*tau+1.5*t << 112     G4double f = 2.*std::log(tau)
105        -tsq*(0.5-tsq/12.)/(t2*t2))/(t1*t1);    << 113                  - (6.*tau+1.5*tsq-tau*(1.-tsq/3.)/t2-tsq*(0.5-tsq/12.)/
106     dEdx = Z*(G4Log(2.*tau+4.)-2.*ionpotlog+f) << 114                      (t2*t2))/(t1*t1);
                                                   >> 115     dEdx = (std::log(2.*tau+4.)-2.*ionpotlog+f)/beta2;
                                                   >> 116     dEdx = twopi_mc2_rcl2*Z*dEdx;
107                                                   117 
108     // loss from bremsstrahlung follows           118     // loss from bremsstrahlung follows
109     G4double cbrem = (cbr1+cbr2*Z)                119     G4double cbrem = (cbr1+cbr2*Z)
110                    * (cbr3+cbr4*G4Log(kinEnerg << 120                        *(cbr3+cbr4*std::log(KineticEnergy/Thigh));
111     dEdx += cbrem*Z*(Z+1.)*bremfactor*tau/beta << 121     cbrem = Z*(Z+1.)*cbrem*tau/beta2;
                                                   >> 122     cbrem *= bremfactor ;
                                                   >> 123     dEdx += twopi_mc2_rcl2*cbrem;
112   }                                               124   }
113   return dEdx*CLHEP::twopi_mc2_rcl2;           << 125   return dEdx;
114 }                                                 126 }
115                                                   127 
116 // ------------------------------------------- << 128 
117                                                   129