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// $Id: G4HETCChargedFragment.cc,v 1.3 2010/08/28 15:16:55 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-03-ref-09 $
//
// by V. Lara
//
// Modified:
// 23.08.2010 V.Ivanchenko general cleanup, move constructor and destructor 
//            the source, use G4Pow
//

#include "G4HETCChargedFragment.hh"
#include "G4VCoulombBarrier.hh"
#include "G4PreCompoundParameters.hh"

G4HETCChargedFragment::G4HETCChargedFragment(
  const G4ParticleDefinition* pd, G4VCoulombBarrier * aCoulombBarrier)
  : G4HETCFragment(pd, aCoulombBarrier)
{}

G4HETCChargedFragment::~G4HETCChargedFragment()
{}

G4double G4HETCChargedFragment::
GetKineticEnergy(const G4Fragment & aFragment)
{
  G4int Pb = aFragment.GetNumberOfParticles();
  G4int H = aFragment.GetNumberOfHoles();

  G4double g0 = (6.0/pi2)*aFragment.GetA_asInt()*theParameters->GetLevelDensity();

  G4double Ab = std::max(0.0,G4double(Pb*Pb+H*H+Pb-3*H)/(4.0*g0));
  G4double Emax = GetMaximalKineticEnergy() - Ab;

  G4double x = BetaRand(Pb + H, 2);
  
  return Emax - (Emax-GetCoulombBarrier())*x;
}