G4AblaInterface.cc

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//
// ABLAXX statistical de-excitation model
// Jose Luis Rodriguez, GSI (translation from ABLA07 and contact person)
// Pekka Kaitaniemi, HIP (initial translation of ablav3p)
// Aleksandra Kelic, GSI (ABLA07 code)
// Davide Mancusi, CEA (contact person INCL)
// Aatos Heikkinen, HIP (project coordination)
//
 
#define ABLAXX_IN_GEANT4_MODE 1
 
#include "globals.hh"
 
#ifdef ABLAXX_IN_GEANT4_MODE
 
#include "G4AblaInterface.hh"
#include "G4ParticleDefinition.hh"
#include "G4ReactionProductVector.hh"
#include "G4ReactionProduct.hh"
#include "G4DynamicParticle.hh"
#include "G4IonTable.hh"
#include "G4SystemOfUnits.hh"
#include "G4PhysicalConstants.hh"
#include <iostream>
#include <cmath>
 
G4AblaInterface::G4AblaInterface() :
  G4VPreCompoundModel(NULL, "ABLA"),
  ablaResult(new G4VarNtp),
  volant(new G4Volant),
  theABLAModel(new G4Abla(volant, ablaResult)),
  eventNumber(0)
{
  theABLAModel->initEvapora();
  theABLAModel->SetParameters();
}
 
G4AblaInterface::~G4AblaInterface() {
  delete volant;
  delete ablaResult;
  delete theABLAModel;
}
 
G4ReactionProductVector *G4AblaInterface::DeExcite(G4Fragment &aFragment) {
  volant->clear();
  ablaResult->clear();
 
  const G4int ARem = aFragment.GetA_asInt();
  const G4int ZRem = aFragment.GetZ_asInt();
  const G4double eStarRem = aFragment.GetExcitationEnergy() / MeV;
  const G4double jRem = aFragment.GetAngularMomentum().mag() / hbar_Planck;
  const G4LorentzVector &pRem = aFragment.GetMomentum();
  const G4double pxRem = pRem.x() / MeV;
  const G4double pyRem = pRem.y() / MeV;
  const G4double pzRem = pRem.z() / MeV;
 
  eventNumber++;
 
  theABLAModel->DeexcitationAblaxx(ARem, ZRem,
                          eStarRem,
                          jRem,
                          pxRem,
                          pyRem,
                          pzRem,
                          eventNumber);
 
  G4ReactionProductVector *result = new G4ReactionProductVector;
 
  for(int j = 0; j < ablaResult->ntrack; ++j) { // Copy ABLA result to the EventInfo
 
    G4ReactionProduct *product = toG4Particle(ablaResult->avv[j],
                                              ablaResult->zvv[j],
                                              ablaResult->svv[j],
                                              ablaResult->enerj[j],
                                              ablaResult->pxlab[j],
                                              ablaResult->pylab[j],
                                              ablaResult->pzlab[j]);
    if(product)
      result->push_back(product);
  }
  return result;
}
 
G4ParticleDefinition *G4AblaInterface::toG4ParticleDefinition(G4int A, G4int Z, G4int S) const {
  if     (A == 1 && Z == 1 && S == 0)  return G4Proton::Proton();
  else if(A == 1 && Z == 0 && S == 0)  return G4Neutron::Neutron();
  else if(A == 1 && Z == 0 && S == -1)  return G4Lambda::Lambda();
  else if(A == -1 && Z == 1 && S == 0)  return G4PionPlus::PionPlus();
  else if(A == -1 && Z == -1 && S == 0) return G4PionMinus::PionMinus();
  else if(A == -1 && Z == 0 && S == 0)  return G4PionZero::PionZero();
  else if(A == 0 && Z == 0 && S == 0)  return G4Gamma::Gamma();
  else if(A == 2 && Z == 1 && S == 0)  return G4Deuteron::Deuteron();
  else if(A == 3 && Z == 1 && S == 0)  return G4Triton::Triton();
  else if(A == 3 && Z == 2 && S == 0)  return G4He3::He3();
  else if(A == 4 && Z == 2 && S == 0)  return G4Alpha::Alpha();
  else if(A > 0 && Z > 0 && A > Z) { // Returns ground state ion definition.
    return G4IonTable::GetIonTable()->GetIon(Z, A, std::abs(S));//S is the number of lambdas
  } else { // Error, unrecognized particle
    G4cout << "Can't convert particle with A=" << A << ", Z=" << Z << ", S=" << S << " to G4ParticleDefinition, trouble ahead" << G4endl;
    return 0;
  }
}
 
G4ReactionProduct *G4AblaInterface::toG4Particle(G4int A, G4int Z, G4int S,
                         G4double kinE,
                         G4double px,
                                                 G4double py, G4double pz) const {
  G4ParticleDefinition *def = toG4ParticleDefinition(A, Z, S);
  if(def == 0) { // Check if we have a valid particle definition
    return 0;
  }
 
  const G4double energy = kinE * MeV;
  const G4ThreeVector momentum(px, py, pz);
  const G4ThreeVector momentumDirection = momentum.unit();
  G4DynamicParticle p(def, momentumDirection, energy);
  G4ReactionProduct *r = new G4ReactionProduct(def);
  (*r) = p;
  return r;
}
 
void G4AblaInterface::ModelDescription(std::ostream& outFile) const {
   outFile << "ABLA++ does not provide an implementation of the ApplyYourself method!\n\n";
}
 
void G4AblaInterface::DeExciteModelDescription(std::ostream& outFile) const {
   outFile 
     << "ABLA++ is a statistical model for nuclear de-excitation. It simulates\n"
     << "the gamma emission and the evaporation of neutrons, light charged particles\n"
     << "and IMFs, as well as fission where applicable. The code included in Geant4\n"
     << "is a C++ translation of the original Fortran code ABLA07. Although the model\n"
     << "has been recently extended to hypernuclei by including the evaporation of lambda\n"
     << "particles. More details about the physics are available in the\n"
     << "Geant4 Physics Reference Manual and in the reference articles.\n\n"
     << "References:\n"
     << "(1) A. Kelic, M. V. Ricciardi, and K. H. Schmidt, in Proceedings of Joint\n"
     << "ICTP-IAEA Advanced Workshop on Model Codes for Spallation Reactions,\n"
     << "ICTP Trieste, Italy, 4–8 February 2008, edited by D. Filges, S. Leray, Y. Yariv,\n"
     << "A. Mengoni, A. Stanculescu, and G. Mank (IAEA INDC(NDS)-530, Vienna, 2008), pp. 181–221.\n\n"
     << "(2) J.L. Rodriguez-Sanchez, J.-C. David et al., Phys. Rev. C 98, 021602 (2018)\n\n"; 
}
 
#endif // ABLAXX_IN_GEANT4_MODE