G4PreCompoundDeexcitation.cc

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//
//
// Takes an arbitrary excited or unphysical nuclear state and produces
// a final state with evaporated particles and (possibly) a stable nucleus.
//
// 20100922  M. Kelsey -- Remove convertFragment() function, pass buffer
//    instead of copying, clean up code somewhat
// 20100925  M. Kelsey -- Use new G4InuclNuclei->G4Fragment conversion, and
//    G4ReactionProducts -> G4CollisionOutput convertor.  Move Z==0
//    explosion condition to base-class function.
// 20100926  M. Kelsey -- Move to new G4VCascadeDeexcitation base class,
//    replace getDeexcitationFragments() with deExcite().
// 20110214  M. Kelsey -- Follow G4InuclParticle::Model enumerator migration
// 20110803  M. Kelsey -- Add post-deexcitation diagnostic messages
// 20120120  V. Ivanchenko -- Pre-compound model and its handler should not be deleted here
// 20130621  Replace collide() interface with deExcite() using G4Fragment ref
// 20130622  Inherit from G4CascadeDeexciteBase, add verbosity interface
//    to pass to PreCompound
// 20140508  Per V. Ivanchenko, attempt to use common instance of PreCompound.

#include "G4PreCompoundDeexcitation.hh"
#include "G4HadronicInteraction.hh"
#include "G4HadronicInteractionRegistry.hh"
#include "G4InuclElementaryParticle.hh"
#include "G4InuclNuclei.hh"
#include "G4InuclParticle.hh"
#include "G4InuclParticleNames.hh"
#include "G4PreCompoundModel.hh"
#include "G4ReactionProductVector.hh"

using namespace G4InuclParticleNames;


// Constructor and destructor

G4PreCompoundDeexcitation::G4PreCompoundDeexcitation() 
  : G4CascadeDeexciteBase("G4PreCompoundDeexcitation"),
    theExcitationHandler(0), theDeExcitation(0) {
  // Access common instance of PreCompound instead of creating new one
  G4HadronicInteraction* p =
    G4HadronicInteractionRegistry::Instance()->FindModel("PRECO");

  // If not found, or cast fails, create a local instance
  theDeExcitation = static_cast<G4PreCompoundModel*>(p);
  if (!theDeExcitation) {
    theExcitationHandler = new G4ExcitationHandler;
    theDeExcitation = new G4PreCompoundModel(theExcitationHandler);
  }
}

G4PreCompoundDeexcitation::~G4PreCompoundDeexcitation() {
  // Per V.I. -- do not delete locally; handled in hadronic registry
  //delete theExcitationHandler;
  //delete theDeExcitation;
}

void G4PreCompoundDeexcitation::setVerboseLevel(G4int verbose) {
  G4CascadeDeexciteBase::setVerboseLevel(verbose);
  theDeExcitation->SetVerboseLevel(verbose);
  // NOTE: G4ExcitationHandler doesn't have verbosity
}


// Main processing

void G4PreCompoundDeexcitation::deExcite(const G4Fragment& fragment,
           G4CollisionOutput& globalOutput) {
  if (verboseLevel)
    G4cout << " >>> G4PreCompoundDeexcitation::deExcite" << G4endl;

  if (verboseLevel > 1)
    G4cout << fragment << G4endl;

  G4ReactionProductVector* precompoundProducts = 0;

  if (explosion(fragment) && theExcitationHandler) {
    // FIXME: in principle, the explosion(...) stuff should also
    // handle properly the case of Z=0 (neutron blob)
    if (verboseLevel) G4cout << " calling BreakItUp" << G4endl;
    precompoundProducts = theExcitationHandler->BreakItUp(fragment);

  } else {
    if (verboseLevel) G4cout << " calling DeExcite" << G4endl;
    // NOTE:  DeExcite() interface takes a *non-const* reference
    // Make a non-const copy of original G4Fragment; otherwise it may be
    // changed by DeExcite()
    G4Fragment originalFragment(fragment);
    precompoundProducts =
      theDeExcitation->DeExcite(originalFragment);
  }

  // Transfer output of de-excitation back into Bertini objects
  if (precompoundProducts) {
    if (verboseLevel>1) {
      G4cout << " Got " << precompoundProducts->size()
       << " secondaries back from PreCompound:" << G4endl;
    }

    globalOutput.setVerboseLevel(verboseLevel); // For debugging
    globalOutput.addOutgoingParticles(precompoundProducts);
    globalOutput.setVerboseLevel(0);

    for ( size_t i = 0; i < precompoundProducts->size(); i++ ) {
      if ( (*precompoundProducts)[ i ] ) {
        delete (*precompoundProducts)[ i ];
        (*precompoundProducts)[ i ] = 0;
      }
    }
    precompoundProducts->clear();
    delete precompoundProducts;
  }
}