G4PreCompoundTriton.cc

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// -------------------------------------------------------------------
//
// GEANT4 Class file
//
//
// File name:     G4PreCompoundTriton
//
// 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
// 05.07.2013 J.M. Quesada FactorialFactor fixed
//
 
#include "G4PreCompoundTriton.hh"
#include "G4SystemOfUnits.hh"
#include "G4Triton.hh"

G4PreCompoundTriton::G4PreCompoundTriton()
  : G4PreCompoundIon(G4Triton::Triton(), &theTritonCoulombBarrier)
{}

G4PreCompoundTriton::~G4PreCompoundTriton()
{}

G4double G4PreCompoundTriton::FactorialFactor(G4int N, const G4int P) const
{
  return G4double((N-3)*(P-2)*(N-2)*(P-1)*(N-1)*P)/12.0; 
}
  
G4double G4PreCompoundTriton::CoalescenceFactor(G4int A) const
{
  return 243.0/G4double(A*A);
}    

G4double G4PreCompoundTriton::GetRj(G4int nParticles, G4int nCharged) const
{
  G4double rj = 0.0;
  if(nCharged >= 1 && (nParticles-nCharged) >= 2) {
    G4double denominator = 
      G4double(nParticles*(nParticles-1)*(nParticles-2));
    rj = G4double(3*nCharged*(nParticles-nCharged)*(nParticles-nCharged-1))
      /denominator; 
  }
  return rj;
}

G4double G4PreCompoundTriton::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 + C/3.0;
}