G4FermiCoulombBarrier.cc

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//
// Hadronic Process: Nuclear De-excitations
// by V. Lara (Dec 1999)
//
// 14-11-2007 modified barrier by JMQ (test30) 
// 15-11-2010 V.Ivanchenko use G4Pow and cleanup 
 
#include "G4FermiCoulombBarrier.hh"
#include "G4PhysicalConstants.hh"
#include "G4SystemOfUnits.hh"
#include "G4Pow.hh"
#include "G4NuclearRadii.hh"
 
G4FermiCoulombBarrier::G4FermiCoulombBarrier(G4int A, G4int Z)
  : G4VCoulombBarrier(A, Z)
{
  SetParameters(G4NuclearRadii::RadiusCB(Z, A), 1.3*CLHEP::fermi);
  factor = CLHEP::elm_coupling*0.6*g4calc->Z13(7)/theRho;
}
 
G4double G4FermiCoulombBarrier::GetCoulombBarrier(
         G4int ARes, G4int ZRes, G4double) const 
{
  if(0 == theZ) { return 0.0; }
  G4int A = theA + ARes;
  G4int Z = theZ + ZRes;
  G4double cb = factor*((Z*Z)/g4calc->Z13(A) - (theZ*theZ)/g4calc->Z13(theA)
            - (ZRes*ZRes)/g4calc->Z13(ARes));
  return cb;
}