G4PairingCorrection.cc

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//
// Hadronic Process: Nuclear De-excitations
// by V. Lara
//
// Modified:
// 21.03.2013 V.Ivanchenko redesigned and cleaned up
 
#include "G4PairingCorrection.hh"
#include "G4SystemOfUnits.hh"
 
const G4double PairingConstant = 12.0*CLHEP::MeV;
 
G4PairingCorrection::G4PairingCorrection()
{}
 
G4double G4PairingCorrection::GetPairingCorrection(G4int A, G4int Z) const
{
  G4double pairCorr = 0.0;
  G4int N = A - Z;
 
  if(!theCameronGilbertPairingCorrections.GetPairingCorrection(N,Z,pairCorr)) {
    pairCorr = ((1 - Z + 2*(Z/2)) + (1 - N + 2*(N/2)))
      *PairingConstant/std::sqrt(static_cast<G4double>(A));
  }
  //theCorr.GetPairingCorrection(N,Z,pairCorr);
 
  return std::max(pairCorr, 0.0);
}
 
G4double 
G4PairingCorrection::GetFissionPairingCorrection(G4int A, G4int Z) const 
{
  G4int N = A - Z;
  G4double pairCorr = ((1 - Z + 2*(Z/2)) + (1 - N + 2*(N/2)))
    *PairingConstant/std::sqrt(static_cast<G4double>(A));
  return pairCorr;
}