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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 10.2.p1)


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 25 //                                                 25 //
 26 // G4RToEConvForPositron class implementation  << 
 27 //                                                 26 //
 28 // Author: H.Kurashige, 05 October 2002 - Firs <<  27 // $Id: G4RToEConvForPositron.cc 70745 2013-06-05 10:54:00Z gcosmo $
 29 // ------------------------------------------- <<  28 //
                                                   >>  29 //
                                                   >>  30 // --------------------------------------------------------------
                                                   >>  31 //      GEANT 4 class implementation file/  History:
                                                   >>  32 //    5 Oct. 2002, H.Kuirashige : Structure created based on object model
                                                   >>  33 // --------------------------------------------------------------
 30                                                    34 
 31 #include "G4RToEConvForPositron.hh"                35 #include "G4RToEConvForPositron.hh"
 32 #include "G4ParticleDefinition.hh"                 36 #include "G4ParticleDefinition.hh"
 33 #include "G4ParticleTable.hh"                      37 #include "G4ParticleTable.hh"
                                                   >>  38 #include "G4Material.hh"
                                                   >>  39 #include "G4PhysicsLogVector.hh"
 34                                                    40 
                                                   >>  41 #include "G4ios.hh"
 35 #include "G4PhysicalConstants.hh"                  42 #include "G4PhysicalConstants.hh"
 36 #include "G4SystemOfUnits.hh"                      43 #include "G4SystemOfUnits.hh"
 37 #include "G4Pow.hh"                            << 
 38 #include "G4Log.hh"                            << 
 39 #include "G4Exp.hh"                            << 
 40                                                    44 
 41 // ------------------------------------------- << 
 42 G4RToEConvForPositron::G4RToEConvForPositron()     45 G4RToEConvForPositron::G4RToEConvForPositron() 
 43   : G4VRangeToEnergyConverter()                <<  46   : G4VRangeToEnergyConverter(),
                                                   >>  47     Mass(0.0),
                                                   >>  48     Z(-1.),  
                                                   >>  49     taul(0.0),
                                                   >>  50     ionpot(0.0),
                                                   >>  51     ionpotlog(-1.0e-10),
                                                   >>  52     bremfactor(0.1)
 44 {                                                  53 {    
 45   theParticle = G4ParticleTable::GetParticleTa <<  54   theParticle =  G4ParticleTable::GetParticleTable()->FindParticle("e+");
 46   if (theParticle == nullptr)                  <<  55   if (theParticle ==0) {
 47   {                                            << 
 48 #ifdef G4VERBOSE                                   56 #ifdef G4VERBOSE
 49     if (GetVerboseLevel()>0)                   <<  57     if (GetVerboseLevel()>0) {
 50     {                                          <<  58       G4cout << " G4RToEConvForPositron::G4RToEConvForPositron() ";
 51       G4cout << "G4RToEConvForPositron::G4RToE <<  59       G4cout << " Positron is not defined !!" << G4endl;
 52       G4cout << "Positron is not defined !!" < << 
 53     }                                              60     }
 54 #endif                                             61 #endif
                                                   >>  62   } else {
                                                   >>  63     Mass = theParticle->GetPDGMass();
 55   }                                                64   }
 56   else                                         << 
 57   {                                            << 
 58     fPDG = theParticle->GetPDGEncoding();      << 
 59   }                                            << 
 60 }                                                  65 }
 61                                                    66 
 62 // ------------------------------------------- <<  67 G4RToEConvForPositron::~G4RToEConvForPositron()
 63 G4RToEConvForPositron::~G4RToEConvForPositron( <<  68 { 
 64 {}                                             <<  69 }
 65                                                <<  70 
 66 // ------------------------------------------- <<  71 
 67 G4double G4RToEConvForPositron::ComputeValue(c <<  72 
 68                                              c <<  73 
                                                   >>  74 // **********************************************************************
                                                   >>  75 // ************************* ComputeLoss ********************************
                                                   >>  76 // **********************************************************************
                                                   >>  77 G4double G4RToEConvForPositron::ComputeLoss(G4double AtomicNumber,
                                                   >>  78               G4double KineticEnergy) 
 69 {                                                  79 {
 70   const G4double cbr1=0.02, cbr2=-5.7e-5, cbr3 <<  80   const  G4double cbr1=0.02, cbr2=-5.7e-5, cbr3=1., cbr4=0.072;
 71   const G4double Tlow=10.*CLHEP::keV, Thigh=1. <<  81   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                                                    82 
 82   G4double tau = kinEnergy/CLHEP::electron_mas <<  83   //  calculate dE/dx for electrons
 83   G4double dEdx = 0.0;                         <<  84   if( std::fabs(AtomicNumber-Z)>0.1 ) {
                                                   >>  85     Z = AtomicNumber;
                                                   >>  86     taul = Tlow/Mass;
                                                   >>  87     ionpot = 1.6e-5*MeV*std::exp(0.9*std::log(Z))/Mass;
                                                   >>  88     ionpotlog = std::log(ionpot);
                                                   >>  89   } 
 84                                                    90 
                                                   >>  91   G4double tau = KineticEnergy/Mass;
                                                   >>  92   G4double dEdx;
 85                                                    93 
 86   if(tau<taul)                                 <<  94  if(tau<taul)
 87   {                                                95   {
 88     G4double t1 = taul+1.;                         96     G4double t1 = taul+1.;
 89     G4double t2 = taul+2.;                         97     G4double t2 = taul+2.;
 90     G4double tsq = taul*taul;                      98     G4double tsq = taul*taul;
 91     G4double beta2 = taul*t2/(t1*t1);              99     G4double beta2 = taul*t2/(t1*t1);
 92     G4double f = 2.*logtaul -                  << 100     G4double     f = 2.*std::log(taul)
 93       (6.*taul+1.5*tsq-taul*(1.-tsq/3.)/t2     << 101                      -(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);    << 102                        (t2*t2))/(t1*t1);
 95     dEdx = (G4Log(2.*taul+4.)-2.*ionpotlog+f)/ << 103     dEdx = (std::log(2.*taul+4.)-2.*ionpotlog+f)/beta2;
 96     dEdx *= Z*taul12/std::sqrt(tau);           << 104     dEdx = twopi_mc2_rcl2*Z*dEdx;
 97   }                                            << 105     G4double clow = dEdx*std::sqrt(taul);
 98   else                                         << 106     dEdx = clow/std::sqrt(KineticEnergy/Mass);
 99   {                                            << 107 
100     G4double t1 = tau+1.;                      << 108   } else {
                                                   >> 109    G4double t1 = tau+1.;
101     G4double t2 = tau+2.;                         110     G4double t2 = tau+2.;
102     G4double tsq = tau*tau;                       111     G4double tsq = tau*tau;
103     G4double beta2 = tau*t2/(t1*t1);              112     G4double beta2 = tau*t2/(t1*t1);
104     G4double f = 2.*G4Log(tau) - (6.*tau+1.5*t << 113     G4double f = 2.*std::log(tau)
105        -tsq*(0.5-tsq/12.)/(t2*t2))/(t1*t1);    << 114                  - (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) << 115                      (t2*t2))/(t1*t1);
                                                   >> 116     dEdx = (std::log(2.*tau+4.)-2.*ionpotlog+f)/beta2;
                                                   >> 117     dEdx = twopi_mc2_rcl2*Z*dEdx;
107                                                   118 
108     // loss from bremsstrahlung follows           119     // loss from bremsstrahlung follows
109     G4double cbrem = (cbr1+cbr2*Z)                120     G4double cbrem = (cbr1+cbr2*Z)
110                    * (cbr3+cbr4*G4Log(kinEnerg << 121                        *(cbr3+cbr4*std::log(KineticEnergy/Thigh));
111     dEdx += cbrem*Z*(Z+1.)*bremfactor*tau/beta << 122     cbrem = Z*(Z+1.)*cbrem*tau/beta2;
                                                   >> 123     cbrem *= bremfactor ;
                                                   >> 124     dEdx += twopi_mc2_rcl2*cbrem;
112   }                                               125   }
113   return dEdx*CLHEP::twopi_mc2_rcl2;           << 126   return dEdx;
114 }                                                 127 }
115                                                   128 
116 // ------------------------------------------- << 129 
117                                                   130