G4FPYBiasedLightFragmentDist.cc

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/*
 * File:   G4FPYBiasedLightFragmentDist.cc
 * Author: B. Wendt ([email protected])
 *
 * Created on June 2, 2011, 11:02 AM
 */
 
#include "G4FPYBiasedLightFragmentDist.hh"
 
#include "G4FFGDebuggingMacros.hh"
#include "G4FFGEnumerations.hh"
#include "G4FissionProductYieldDist.hh"
#include "G4Ions.hh"
#include "Randomize.hh"
#include "globals.hh"
 
G4FPYBiasedLightFragmentDist::G4FPYBiasedLightFragmentDist(
  G4int WhichIsotope, G4FFGEnumerations::MetaState WhichMetaState,
  G4FFGEnumerations::FissionCause WhichCause, G4FFGEnumerations::YieldType WhichYieldType,
  std::istringstream& dataStream)
  : G4FissionProductYieldDist(WhichIsotope, WhichMetaState, WhichCause, WhichYieldType, dataStream)
{
  // Initialize the class
  Initialize();
}
 
G4FPYBiasedLightFragmentDist::G4FPYBiasedLightFragmentDist(
  G4int WhichIsotope, G4FFGEnumerations::MetaState WhichMetaState,
  G4FFGEnumerations::FissionCause WhichCause, G4FFGEnumerations::YieldType WhichYieldType,
  G4int Verbosity, std::istringstream& dataStream)
  : G4FissionProductYieldDist(WhichIsotope, WhichMetaState, WhichCause, WhichYieldType, Verbosity,
                              dataStream)
{
  // Initialize the class
  Initialize();
}
 
void G4FPYBiasedLightFragmentDist::Initialize()
{
  G4FFG_FUNCTIONENTER__
 
  // Initialize the half-weight for fission product sampling
  HalfWeight_ = (G4int)floor((Isotope_ % 1000) / 2.0);
 
  G4FFG_FUNCTIONLEAVE__
}
 
G4Ions* G4FPYBiasedLightFragmentDist::GetFissionProduct()
{
  G4FFG_FUNCTIONENTER__
 
  G4Ions* Particle;
  G4bool IsHeavy;
  G4bool IsNotFeasable;
  G4int Counter;
 
  Counter = 0;
  do {
    // If we have sampled too many times then we may need to do something else
    if (Counter == 1000) {
      Particle = nullptr;
      break;
    }
 
    // Generate a (0, 1] random number, then find the corresponding particle
    Particle = FindParticle(RandomEngine_->G4SampleUniform());
 
    // If the daughter is heavier than half of the original nucleus weight
    // or not physically feasable then set the flags to sample again
    IsHeavy = (Particle->GetAtomicMass() > HalfWeight_);
    IsNotFeasable = (Particle->GetAtomicMass() > RemainingA_ + 1
                     || Particle->GetAtomicNumber() > RemainingZ_ + 1);
 
    Counter++;
  } while (IsHeavy || IsNotFeasable);  // Loop checking, 11.05.2015, T. Koi
 
  // Something went wrong, so figure out how to fix it
  if (Particle == nullptr) {
    /// \todo   Figure out what to do if a suitable particle is not found in 1000 iterations
  }
 
  // Return the G4ParticleDefintion pointer to the random light fragment
  G4FFG_FUNCTIONLEAVE__
  return Particle;
}
 
G4FPYBiasedLightFragmentDist::~G4FPYBiasedLightFragmentDist()
{
  G4FFG_FUNCTIONENTER__
 
  // Empty - all the data elements to be deconstructed are removed by
  // ~G4FissionProductYieldDist()
  G4FFG_FUNCTIONLEAVE__
}