Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/processes/hadronic/models/de_excitation/util/src/G4PairingCorrection.cc

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 25 //
 26 //
 27 // Hadronic Process: Nuclear De-excitations
 28 // by V. Lara
 29 //
 30 // Modified:
 31 // 21.03.2013 V.Ivanchenko redesigned and cleaned up
 32 
 33 #include "G4PairingCorrection.hh"
 34 #include "G4SystemOfUnits.hh"
 35 
 36 namespace
 37 {
 38   const G4double PairingConstant = 12.0*CLHEP::MeV;
 39 }
 40 
 41 G4PairingCorrection::G4PairingCorrection()
 42 {}
 43 
 44 G4double G4PairingCorrection::GetPairingCorrection(G4int A, G4int Z) const
 45 {
 46   G4double pairCorr = 0.0;
 47   G4int N = A - Z;
 48 
 49   if (!theCameronGilbertPairingCorrections.GetPairingCorrection(N, Z,  pairCorr) ) {
 50     pairCorr = (2 - A + 2*(Z/2) + 2*(N/2))
 51       *PairingConstant/std::sqrt(static_cast<G4double>(A));
 52   }
 53   return pairCorr;
 54 }
 55 
 56 G4double 
 57 G4PairingCorrection::GetFissionPairingCorrection(G4int A, G4int Z) const 
 58 {
 59   G4int N = A - Z;
 60   G4double pairCorr = (2 - A + 2*(Z/2) + 2*(N/2))
 61     *PairingConstant/std::sqrt(static_cast<G4double>(A));
 62   return pairCorr;
 63 }
 64