G4INCLNuclearDensityFactory.cc

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//
// INCL++ intra-nuclear cascade model
// Pekka Kaitaniemi, CEA and Helsinki Institute of Physics
// Davide Mancusi, CEA
// Alain Boudard, CEA
// Sylvie Leray, CEA
// Joseph Cugnon, University of Liege
//
#define INCLXX_IN_GEANT4_MODE 1

#include "globals.hh"

#include "G4INCLNuclearDensityFactory.hh"
#include "G4INCLNDFWoodsSaxon.hh"
#include "G4INCLNDFModifiedHarmonicOscillator.hh"
#include "G4INCLNDFGaussian.hh"
#include "G4INCLNDFParis.hh"
#include "G4INCLNDFHardSphere.hh"

namespace G4INCL {

  std::map<G4int,NuclearDensity*> NuclearDensityFactory::nuclearDensityCache;

  std::map<G4int,InverseInterpolationTable*> NuclearDensityFactory::rpCorrelationTableCache;

  std::map<G4int,InverseInterpolationTable*> NuclearDensityFactory::rCDFTableCache;

  std::map<G4int,InverseInterpolationTable*> NuclearDensityFactory::pCDFTableCache;

  NuclearDensity* NuclearDensityFactory::createDensity(const G4int A, const G4int Z) {
    const G4int nuclideID = 1000*Z + A; // MCNP-style nuclide IDs
    const std::map<G4int,NuclearDensity*>::const_iterator mapEntry = nuclearDensityCache.find(nuclideID);
    if(mapEntry == nuclearDensityCache.end()) {
      InverseInterpolationTable *rpCorrelationTable = NuclearDensityFactory::createRPCorrelationTable(A, Z);
      if(!rpCorrelationTable)
        return NULL;
      NuclearDensity *density = new NuclearDensity(A, Z, rpCorrelationTable);
      nuclearDensityCache[nuclideID] = density;
      return density;
    } else {
      return mapEntry->second;
    }
  }

  InverseInterpolationTable *NuclearDensityFactory::createRPCorrelationTable(const G4int A, const G4int Z) {
    const G4int nuclideID = 1000*Z + A; // MCNP-style nuclide IDs
    const std::map<G4int,InverseInterpolationTable*>::const_iterator mapEntry = rpCorrelationTableCache.find(nuclideID);
    if(mapEntry == rpCorrelationTableCache.end()) {

      IFunction1D *rpCorrelationFunction;
      if(A > 19) {
        const G4double radius = ParticleTable::getRadiusParameter(A, Z);
        const G4double diffuseness = ParticleTable::getSurfaceDiffuseness(A, Z);
        const G4double maximumRadius = ParticleTable::getMaximumNuclearRadius(A, Z);
        rpCorrelationFunction = new NuclearDensityFunctions::WoodsSaxonRP(radius, maximumRadius, diffuseness);
      } else if(A <= 19 && A > 6) {
        const G4double radius = ParticleTable::getRadiusParameter(A, Z);
        const G4double diffuseness = ParticleTable::getSurfaceDiffuseness(A, Z);
        const G4double maximumRadius = ParticleTable::getMaximumNuclearRadius(A, Z);
        rpCorrelationFunction = new NuclearDensityFunctions::ModifiedHarmonicOscillatorRP(radius, maximumRadius, diffuseness);
      } else if(A <= 6 && A > 1) { // Gaussian distribution for light nuclei
        const G4double radius = ParticleTable::getRadiusParameter(A, Z);
        const G4double maximumRadius = ParticleTable::getMaximumNuclearRadius(A, Z);
        rpCorrelationFunction = new NuclearDensityFunctions::GaussianRP(maximumRadius, Math::oneOverSqrtThree * radius);
      } else {
        ERROR("No r-p correlation function for target A = "
            << A << " Z = " << Z << std::endl);
        return NULL;
      }

      class InverseCDFOneThird : public IFunction1D {
        public:
          InverseCDFOneThird(IFunction1D const * const f) :
            IFunction1D(f->getXMinimum(), f->getXMaximum()),
            theFunction(f),
            normalisation(1./theFunction->integrate(xMin,xMax))
        {}

          G4double operator()(const G4double x) const {
            return Math::pow13(normalisation * theFunction->integrate(xMin,x));
          }
        private:
          IFunction1D const * const theFunction;
          const G4double normalisation;
      } *theInverseCDFOneThird = new InverseCDFOneThird(rpCorrelationFunction);

      InverseInterpolationTable *theTable = new InverseInterpolationTable(*theInverseCDFOneThird);
      delete theInverseCDFOneThird;
      delete rpCorrelationFunction;
      DEBUG("Creating r-p correlation function for A=" << A << ", Z=" << Z << ":"
          << std::endl << theTable->print() << std::endl);

      rpCorrelationTableCache[nuclideID] = theTable;
      return theTable;
    } else {
      return mapEntry->second;
    }
  }

  InverseInterpolationTable *NuclearDensityFactory::createRCDFTable(const G4int A, const G4int Z) {
    const G4int nuclideID = 1000*Z + A; // MCNP-style nuclide IDs
    const std::map<G4int,InverseInterpolationTable*>::const_iterator mapEntry = rCDFTableCache.find(nuclideID);
    if(mapEntry == rCDFTableCache.end()) {

      IFunction1D *rDensityFunction;
      if(A > 19) {
        G4double radius = ParticleTable::getRadiusParameter(A, Z);
        G4double diffuseness = ParticleTable::getSurfaceDiffuseness(A, Z);
        G4double maximumRadius = ParticleTable::getMaximumNuclearRadius(A, Z);
        rDensityFunction = new NuclearDensityFunctions::WoodsSaxon(radius, maximumRadius, diffuseness);
      } else if(A <= 19 && A > 6) {
        G4double radius = ParticleTable::getRadiusParameter(A, Z);
        G4double diffuseness = ParticleTable::getSurfaceDiffuseness(A, Z);
        G4double maximumRadius = ParticleTable::getMaximumNuclearRadius(A, Z);
        rDensityFunction = new NuclearDensityFunctions::ModifiedHarmonicOscillator(radius, maximumRadius, diffuseness);
      } else if(A <= 6 && A > 2) { // Gaussian distribution for light nuclei
        G4double radius = ParticleTable::getRadiusParameter(A, Z);
        G4double maximumRadius = ParticleTable::getMaximumNuclearRadius(A, Z);
        rDensityFunction = new NuclearDensityFunctions::Gaussian(maximumRadius, Math::oneOverSqrtThree * radius);
      } else if(A == 2 && Z == 1) { // density from the Paris potential for deuterons
        rDensityFunction = new NuclearDensityFunctions::ParisR();
      } else {
        ERROR("No nuclear density function for target A = "
            << A << " Z = " << Z << std::endl);
        return NULL;
      }

      InverseInterpolationTable *theTable = rDensityFunction->inverseCDFTable();
      delete rDensityFunction;
      DEBUG("Creating inverse position CDF for A=" << A << ", Z=" << Z << ":" <<
          std::endl << theTable->print() << std::endl);

      rCDFTableCache[nuclideID] = theTable;
      return theTable;
    } else {
      return mapEntry->second;
    }
  }

  InverseInterpolationTable *NuclearDensityFactory::createPCDFTable(const G4int A, const G4int Z) {
    const G4int nuclideID = 1000*Z + A; // MCNP-style nuclide IDs
    const std::map<G4int,InverseInterpolationTable*>::const_iterator mapEntry = pCDFTableCache.find(nuclideID);
    if(mapEntry == pCDFTableCache.end()) {
      IFunction1D *pDensityFunction;
      if(A > 19) {
        pDensityFunction = new NuclearDensityFunctions::HardSphere(PhysicalConstants::Pf);
      } else if(A <= 19 && A > 2) { // Gaussian distribution for light nuclei
        G4double momentumRMS = Math::oneOverSqrtThree * ParticleTable::getMomentumRMS(A, Z);
        pDensityFunction = new NuclearDensityFunctions::Gaussian(5.*momentumRMS, momentumRMS);
      } else if(A == 2 && Z == 1) { // density from the Paris potential for deuterons
        pDensityFunction = new NuclearDensityFunctions::ParisP();
      } else {
        ERROR("No nuclear density function for target A = "
            << A << " Z = " << Z << std::endl);
        return NULL;
      }

      InverseInterpolationTable *theTable = pDensityFunction->inverseCDFTable();
      delete pDensityFunction;
      DEBUG("Creating inverse momentum CDF for A=" << A << ", Z=" << Z << ":" <<
          std::endl << theTable->print() << std::endl);

      pCDFTableCache[nuclideID] = theTable;
      return theTable;
    } else {
      return mapEntry->second;
    }
  }

  ParticleSampler *NuclearDensityFactory::createParticleSampler(const G4int A, const G4int Z) {
    InverseInterpolationTable *rCDFTable = NuclearDensityFactory::createRCDFTable(A, Z);
    InverseInterpolationTable *pCDFTable = NuclearDensityFactory::createPCDFTable(A, Z);
    return new ParticleSampler(A, Z, rCDFTable, pCDFTable);
  }

}

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