G4HETCProton.cc

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// $Id: G4HETCProton.cc 90337 2015-05-26 08:34:27Z gcosmo $
//
// by V. Lara
//
// Modified:
// 23.08.2010 V.Ivanchenko general cleanup, move constructor and destructor 
//            the source, use G4Pow

#include "G4HETCProton.hh"
#include "G4Proton.hh"

G4HETCProton::G4HETCProton() 
  : G4HETCChargedFragment(G4Proton::Proton(), &theProtonCoulombBarrier)
{}

G4HETCProton::~G4HETCProton() 
{}

G4double G4HETCProton::GetAlpha() const
{
  G4double C = 0.0;
  if (theResZ >= 70) 
    {
      C = 0.10;
    } 
  else 
    {
      C = ((((0.15417e-06*theResZ) - 0.29875e-04)*theResZ 
        + 0.21071e-02)*theResZ - 0.66612e-01)*theResZ + 0.98375;
    }
  return 1.0 + C;
}
  
G4double G4HETCProton::GetBeta() const
{
  return -theCoulombBarrier;
}
  
G4double G4HETCProton::GetSpinFactor() const
{
  // 2s+1
  return 2.0;
}

G4double G4HETCProton::K(const G4Fragment & aFragment)
{
  // Number of protons in emitted fragment
  G4int Pa = theZ;

  G4double r = G4double(theResZ)/G4double(theResA);

  G4int P = aFragment.GetNumberOfParticles();
  G4int H = aFragment.GetNumberOfHoles();

  G4double result = 0.0;
  if (P > 0)
    {
      result = (H*r + Pa)/(P*r);
    }

  return std::max(0.0,result);
}