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

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Diff markup

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 11.2)


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 25 //                                                 25 //
 26 //                                                 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     30 // 17.11.2010 V.Ivanchenko cleanup and add usage of G4Pow
 31 // 21.03.2013 V.Ivanchenko redesign parameters     31 // 21.03.2013 V.Ivanchenko redesign parameters classes
 32                                                    32 
 33 #include "G4FissionBarrier.hh"                     33 #include "G4FissionBarrier.hh"
 34 #include "G4CameronShellPlusPairingCorrections     34 #include "G4CameronShellPlusPairingCorrections.hh"
 35 #include "G4NuclearLevelData.hh"                   35 #include "G4NuclearLevelData.hh"
 36 #include "G4ShellCorrection.hh"                    36 #include "G4ShellCorrection.hh"
 37 #include "G4SystemOfUnits.hh"                      37 #include "G4SystemOfUnits.hh"
 38 #include "G4Pow.hh"                                38 #include "G4Pow.hh"
 39                                                    39 
 40 G4FissionBarrier::G4FissionBarrier()               40 G4FissionBarrier::G4FissionBarrier()
 41 {                                                  41 {
 42   SPtr = G4NuclearLevelData::GetInstance()->Ge     42   SPtr = G4NuclearLevelData::GetInstance()->GetShellCorrection()
 43     ->GetCameronShellPlusPairingCorrections();     43     ->GetCameronShellPlusPairingCorrections();
 44 }                                                  44 }
 45                                                    45 
 46 G4FissionBarrier::~G4FissionBarrier()              46 G4FissionBarrier::~G4FissionBarrier()
 47 {}                                                 47 {}
 48                                                    48 
 49 G4double                                           49 G4double 
 50 G4FissionBarrier::FissionBarrier(G4int A, G4in     50 G4FissionBarrier::FissionBarrier(G4int A, G4int Z, G4double U) const 
 51   // Compute fission barrier according with Ba     51   // Compute fission barrier according with Barashenkov's 
 52   // prescription for A >= 65                      52   // prescription for A >= 65
 53 {                                                  53 {
 54   static const G4double blimit = 100.0*CLHEP::     54   static const G4double blimit = 100.0*CLHEP::GeV;
 55   return (A >= 65) ? BarashenkovFissionBarrier     55   return (A >= 65) ? BarashenkovFissionBarrier(A,Z)
 56     /(1.0 + std::sqrt(U/(G4double)(2*A))) : bl     56     /(1.0 + std::sqrt(U/(G4double)(2*A))) : blimit;
 57 }                                                  57 }
 58                                                    58 
 59 G4double                                           59 G4double 
 60 G4FissionBarrier::BarashenkovFissionBarrier(G4     60 G4FissionBarrier::BarashenkovFissionBarrier(G4int A, G4int Z) const
 61   // Calculates Fission Barrier heights            61   // Calculates Fission Barrier heights 
 62 {                                                  62 {
 63   // Liquid drop model parameters for              63   // Liquid drop model parameters for
 64   // surface energy of a spherical nucleus         64   // surface energy of a spherical nucleus
 65   static const G4double aSurf = 17.9439*CLHEP:     65   static const G4double aSurf = 17.9439*CLHEP::MeV;
 66   // and coulomb energy                            66   // and coulomb energy
 67   static const G4double aCoul = 0.7053*CLHEP::     67   static const G4double aCoul = 0.7053*CLHEP::MeV;
 68   static const G4double k = 1.7826;                68   static const G4double k = 1.7826;
 69   G4int N = A - Z;                                 69   G4int N = A - Z;
 70                                                    70 
 71   // fissibility parameter                         71   // fissibility parameter
 72   G4double x = (aCoul/(2.0*aSurf))*(Z*Z)/stati     72   G4double x = (aCoul/(2.0*aSurf))*(Z*Z)/static_cast<G4double>(A);
 73   x /= (1.0 - k*(N-Z)*(N-Z)/static_cast<G4doub     73   x /= (1.0 - k*(N-Z)*(N-Z)/static_cast<G4double>(A*A));
 74                                                    74   
 75   // Liquid drop model part of Fission Barrier     75   // Liquid drop model part of Fission Barrier
 76   G4double BF0 = aSurf*G4Pow::GetInstance()->Z     76   G4double BF0 = aSurf*G4Pow::GetInstance()->Z23(A);
 77   if (x <= 2./3.) { BF0 *= 0.38*(0.75 - x); }      77   if (x <= 2./3.) { BF0 *= 0.38*(0.75 - x); }
 78   else { BF0 *= 0.83*(1. - x)*(1. - x)*(1. - x     78   else { BF0 *= 0.83*(1. - x)*(1. - x)*(1. - x); }
 79                                                    79 
 80   G4int d = N - 2*(N/2) + Z - 2*(Z/2);             80   G4int d = N - 2*(N/2) + Z - 2*(Z/2);
 81                                                    81 
 82   G4double res = 0.0;                              82   G4double res = 0.0;
 83   SPtr->GetPairingCorrection(N,Z,res);             83   SPtr->GetPairingCorrection(N,Z,res);
 84                                                    84 
 85   static const G4double D = 1.248*CLHEP::MeV;      85   static const G4double D = 1.248*CLHEP::MeV;
 86   return BF0 + D*d - res;                          86   return BF0 + D*d - res;
 87 }                                                  87 }
 88                                                    88 
 89                                                    89