G4PreCompoundDeuteron.cc

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// -------------------------------------------------------------------
//
// GEANT4 Class file
//
//
// File name:     G4PreCompoundDeuteron
//
// Author:         V.Lara
//
// Modified:  
// 21.08.2008 J. M. Quesada add choice of options  
// 20.08.2010 V.Ivanchenko added G4Pow and G4PreCompoundParameters pointers
//                         use int Z and A and cleanup
//
 
#include "G4PreCompoundDeuteron.hh"
#include "G4CoulombBarrier.hh"
#include "G4Deuteron.hh"
 
G4PreCompoundDeuteron::G4PreCompoundDeuteron()
  : G4PreCompoundIon(G4Deuteron::Deuteron(), new G4CoulombBarrier(2, 1))
{}
 
G4double G4PreCompoundDeuteron::FactorialFactor(G4int N, G4int P) const
{
  return static_cast<G4double>((N-1)*(N-2)*(P-1)*P)*0.5;
}
  
G4double G4PreCompoundDeuteron::CoalescenceFactor(G4int A) const
{
  return 16.0/static_cast<G4double>(A);
}    
 
G4double G4PreCompoundDeuteron::GetRj(G4int nParticles, G4int nCharged) const
{
  G4double rj = 0.0;
  if(nCharged >=1 && (nParticles-nCharged) >=1) {
    G4double denominator = (G4double)(nParticles*(nParticles-1));
    rj = 2*nCharged*(nParticles-nCharged)/denominator; 
  }
  return rj;
}
 
G4double G4PreCompoundDeuteron::GetAlpha() const
{
  G4double C = 0.0;
  if (theFragZ >= 70) 
    {
      C = 0.10;
    } 
  else 
    {
      C = ((((0.15417e-06*theFragZ) - 0.29875e-04)*theFragZ 
        + 0.21071e-02)*theFragZ - 0.66612e-01)*theFragZ + 0.98375; 
    }
  return 1.0 + 0.5*C;
}