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Geant4/processes/hadronic/models/de_excitation/fission/src/G4FissionBarrier.cc

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Differences between /processes/hadronic/models/de_excitation/fission/src/G4FissionBarrier.cc (Version 11.3.0) and /processes/hadronic/models/de_excitation/fission/src/G4FissionBarrier.cc (Version 7.0.p1)


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 25 //                                                 22 //
 26 //                                                 23 //
                                                   >>  24 // $Id: G4FissionBarrier.cc,v 1.3 2004/12/07 13:46:46 gunter Exp $
                                                   >>  25 // GEANT4 tag $Name: geant4-07-00-patch-01 $
                                                   >>  26 //
 27 // Hadronic Process: Nuclear De-excitations        27 // Hadronic Process: Nuclear De-excitations
 28 // by V. Lara (Oct 1998)                           28 // by V. Lara (Oct 1998)
 29 //                                             <<  29 
 30 // 17.11.2010 V.Ivanchenko cleanup and add usa << 
 31 // 21.03.2013 V.Ivanchenko redesign parameters << 
 32                                                    30 
 33 #include "G4FissionBarrier.hh"                     31 #include "G4FissionBarrier.hh"
 34 #include "G4CameronShellPlusPairingCorrections << 
 35 #include "G4NuclearLevelData.hh"               << 
 36 #include "G4ShellCorrection.hh"                << 
 37 #include "G4SystemOfUnits.hh"                  << 
 38 #include "G4Pow.hh"                            << 
 39                                                    32 
 40 G4FissionBarrier::G4FissionBarrier()           <<  33 G4FissionBarrier::G4FissionBarrier(const G4FissionBarrier & ) : G4VFissionBarrier()
 41 {                                                  34 {
 42   SPtr = G4NuclearLevelData::GetInstance()->Ge <<  35     throw G4HadronicException(__FILE__, __LINE__, "G4FissionBarrier::copy_constructor meant to not be accessable.");
 43     ->GetCameronShellPlusPairingCorrections(); << 
 44 }                                                  36 }
 45                                                    37 
 46 G4FissionBarrier::~G4FissionBarrier()          << 
 47 {}                                             << 
 48                                                    38 
 49 G4double                                       <<  39 const G4FissionBarrier & G4FissionBarrier::operator=(const G4FissionBarrier & )
 50 G4FissionBarrier::FissionBarrier(G4int A, G4in <<  40 {
 51   // Compute fission barrier according with Ba <<  41     throw G4HadronicException(__FILE__, __LINE__, "G4FissionBarrier::operator= meant to not be accessable.");
 52   // prescription for A >= 65                  <<  42     return *this;
 53 {                                              << 
 54   static const G4double blimit = 100.0*CLHEP:: << 
 55   return (A >= 65) ? BarashenkovFissionBarrier << 
 56     /(1.0 + std::sqrt(U/(G4double)(2*A))) : bl << 
 57 }                                                  43 }
 58                                                    44 
 59 G4double                                       <<  45 G4bool G4FissionBarrier::operator==(const G4FissionBarrier & ) const 
 60 G4FissionBarrier::BarashenkovFissionBarrier(G4 <<  46 {
 61   // Calculates Fission Barrier heights        <<  47     return false;
 62 {                                              <<  48 }
 63   // Liquid drop model parameters for          <<  49 
 64   // surface energy of a spherical nucleus     <<  50 G4bool G4FissionBarrier::operator!=(const G4FissionBarrier & ) const 
 65   static const G4double aSurf = 17.9439*CLHEP: <<  51 {
 66   // and coulomb energy                        <<  52     return true;
 67   static const G4double aCoul = 0.7053*CLHEP:: <<  53 }
 68   static const G4double k = 1.7826;            <<  54 
 69   G4int N = A - Z;                             <<  55 
 70                                                <<  56 
 71   // fissibility parameter                     <<  57 G4double G4FissionBarrier::FissionBarrier(const G4int A, const G4int Z, const G4double U)
 72   G4double x = (aCoul/(2.0*aSurf))*(Z*Z)/stati <<  58     // Compute fission barrier according with Barashenkov's prescription for A >= 65
 73   x /= (1.0 - k*(N-Z)*(N-Z)/static_cast<G4doub <<  59 {
                                                   >>  60     if (A >= 65) return BarashenkovFissionBarrier(A,Z)/(1.0 + std::sqrt(U/(2.0*static_cast<G4double>(A))));
                                                   >>  61     else return 100.0*GeV;
                                                   >>  62 }
                                                   >>  63 
                                                   >>  64 
                                                   >>  65 G4double G4FissionBarrier::BarashenkovFissionBarrier(const G4int A, const G4int Z)
                                                   >>  66     // Calculates Fission Barrier heights 
                                                   >>  67 {
                                                   >>  68     // Liquid drop model parameters for
                                                   >>  69     // surface energy of a spherical nucleus
                                                   >>  70     const G4double aSurf = 17.9439*MeV;
                                                   >>  71     // and coulomb energy
                                                   >>  72     const G4double aCoul = 0.7053*MeV;
                                                   >>  73     const G4int N = A - Z;
                                                   >>  74     const G4double k = 1.7826;
                                                   >>  75 
                                                   >>  76     // fissibility parameter
                                                   >>  77     G4double x = (aCoul/(2.0*aSurf))*(static_cast<G4double>(Z)*static_cast<G4double>(Z))/static_cast<G4double>(A);
                                                   >>  78     x /= (1.0 - k*(static_cast<G4double>(N-Z)/static_cast<G4double>(A))*
                                                   >>  79     (static_cast<G4double>(N-Z)/static_cast<G4double>(A)));
 74                                                    80   
 75   // Liquid drop model part of Fission Barrier <<  81     // Liquid drop model part of Fission Barrier
 76   G4double BF0 = aSurf*G4Pow::GetInstance()->Z <<  82     G4double BF0 = aSurf*std::pow(static_cast<G4double>(A),2./3.);
 77   if (x <= 2./3.) { BF0 *= 0.38*(0.75 - x); }  <<  83     if (x <= 2./3.) BF0 *= 0.38*(3./4.-x);
 78   else { BF0 *= 0.83*(1. - x)*(1. - x)*(1. - x <<  84     else BF0 *= 0.83*(1. - x)*(1. - x)*(1. - x);
 79                                                    85 
 80   G4int d = N - 2*(N/2) + Z - 2*(Z/2);         << 
 81                                                    86 
 82   G4double res = 0.0;                          <<  87     // 
 83   SPtr->GetPairingCorrection(N,Z,res);         <<  88     G4double D = 1.248*MeV;
                                                   >>  89     D *= (static_cast<G4double>(N)-2.0*(N/2)) + (static_cast<G4double>(Z)-2.0*(Z/2));
 84                                                    90 
 85   static const G4double D = 1.248*CLHEP::MeV;  <<  91     return BF0 + D - SellPlusPairingCorrection(Z,N);
 86   return BF0 + D*d - res;                      << 
 87 }                                                  92 }
 88                                                    93 
 89                                                    94