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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 10.2)


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 25 //                                                 25 //
                                                   >>  26 // $Id: G4FissionBarrier.cc 68724 2013-04-05 09:26:32Z gcosmo $
 26 //                                                 27 //
 27 // Hadronic Process: Nuclear De-excitations        28 // Hadronic Process: Nuclear De-excitations
 28 // by V. Lara (Oct 1998)                           29 // by V. Lara (Oct 1998)
 29 //                                                 30 //
 30 // 17.11.2010 V.Ivanchenko cleanup and add usa     31 // 17.11.2010 V.Ivanchenko cleanup and add usage of G4Pow
 31 // 21.03.2013 V.Ivanchenko redesign parameters     32 // 21.03.2013 V.Ivanchenko redesign parameters classes
 32                                                    33 
 33 #include "G4FissionBarrier.hh"                     34 #include "G4FissionBarrier.hh"
 34 #include "G4CameronShellPlusPairingCorrections << 
 35 #include "G4NuclearLevelData.hh"               << 
 36 #include "G4ShellCorrection.hh"                    35 #include "G4ShellCorrection.hh"
 37 #include "G4SystemOfUnits.hh"                      36 #include "G4SystemOfUnits.hh"
 38 #include "G4Pow.hh"                                37 #include "G4Pow.hh"
 39                                                    38 
 40 G4FissionBarrier::G4FissionBarrier()               39 G4FissionBarrier::G4FissionBarrier()
 41 {                                                  40 {
 42   SPtr = G4NuclearLevelData::GetInstance()->Ge <<  41   SPtr = 
 43     ->GetCameronShellPlusPairingCorrections(); <<  42     G4ShellCorrection::GetInstance()->GetCameronShellPlusPairingCorrections();
 44 }                                                  43 }
 45                                                    44 
 46 G4FissionBarrier::~G4FissionBarrier()              45 G4FissionBarrier::~G4FissionBarrier()
 47 {}                                                 46 {}
 48                                                    47 
 49 G4double                                           48 G4double 
 50 G4FissionBarrier::FissionBarrier(G4int A, G4in <<  49 G4FissionBarrier::FissionBarrier(G4int A, G4int Z, G4double U)
 51   // Compute fission barrier according with Ba     50   // Compute fission barrier according with Barashenkov's 
 52   // prescription for A >= 65                      51   // prescription for A >= 65
 53 {                                                  52 {
 54   static const G4double blimit = 100.0*CLHEP:: <<  53   if (A >= 65) {
 55   return (A >= 65) ? BarashenkovFissionBarrier <<  54     return BarashenkovFissionBarrier(A,Z)/(1.0 + std::sqrt(U/(2.0*A)));
 56     /(1.0 + std::sqrt(U/(G4double)(2*A))) : bl <<  55   } else { return 100.0*GeV; }
 57 }                                                  56 }
 58                                                    57 
 59 G4double                                           58 G4double 
 60 G4FissionBarrier::BarashenkovFissionBarrier(G4 <<  59 G4FissionBarrier::BarashenkovFissionBarrier(G4int A, G4int Z)
 61   // Calculates Fission Barrier heights            60   // Calculates Fission Barrier heights 
 62 {                                                  61 {
 63   // Liquid drop model parameters for              62   // Liquid drop model parameters for
 64   // surface energy of a spherical nucleus         63   // surface energy of a spherical nucleus
 65   static const G4double aSurf = 17.9439*CLHEP: <<  64   static const G4double aSurf = 17.9439*MeV;
 66   // and coulomb energy                            65   // and coulomb energy
 67   static const G4double aCoul = 0.7053*CLHEP:: <<  66   static const G4double aCoul = 0.7053*MeV;
 68   static const G4double k = 1.7826;                67   static const G4double k = 1.7826;
 69   G4int N = A - Z;                                 68   G4int N = A - Z;
 70                                                    69 
 71   // fissibility parameter                         70   // fissibility parameter
 72   G4double x = (aCoul/(2.0*aSurf))*(Z*Z)/stati     71   G4double x = (aCoul/(2.0*aSurf))*(Z*Z)/static_cast<G4double>(A);
 73   x /= (1.0 - k*(N-Z)*(N-Z)/static_cast<G4doub     72   x /= (1.0 - k*(N-Z)*(N-Z)/static_cast<G4double>(A*A));
 74                                                    73   
 75   // Liquid drop model part of Fission Barrier     74   // Liquid drop model part of Fission Barrier
 76   G4double BF0 = aSurf*G4Pow::GetInstance()->Z     75   G4double BF0 = aSurf*G4Pow::GetInstance()->Z23(A);
 77   if (x <= 2./3.) { BF0 *= 0.38*(0.75 - x); }  <<  76   if (x <= 2./3.) { BF0 *= 0.38*(3./4.-x); }
 78   else { BF0 *= 0.83*(1. - x)*(1. - x)*(1. - x     77   else { BF0 *= 0.83*(1. - x)*(1. - x)*(1. - x); }
 79                                                    78 
 80   G4int d = N - 2*(N/2) + Z - 2*(Z/2);         <<  79   // 
                                                   >>  80   G4double D = 1.248*MeV;
                                                   >>  81   D *= (N - 2*(N/2) + Z - 2*(Z/2));
 81                                                    82 
 82   G4double res = 0.0;                          <<  83   return BF0 + D - SellPlusPairingCorrection(Z,N);
 83   SPtr->GetPairingCorrection(N,Z,res);         << 
 84                                                << 
 85   static const G4double D = 1.248*CLHEP::MeV;  << 
 86   return BF0 + D*d - res;                      << 
 87 }                                                  84 }
 88                                                    85 
 89                                                    86