G4DiscreteGammaDeexcitation.cc

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// $Id: G4DiscreteGammaDeexcitation.cc 88987 2015-03-17 10:39:50Z gcosmo $
//
// -------------------------------------------------------------------
//      GEANT 4 class file 
//
//      CERN, Geneva, Switzerland
//
//      File name:     G4DiscreteGammaDeexcitation
//
//      Author:        Maria Grazia Pia (pia@genova.infn.it)
// 
//      Creation date: 23 October 1998
//
//      Modifications: 
//      8 March 2001, Fan Lei (flei@space.qinetiq.com)
//         Added the following as part if the IC implementation
//            void SetICM(G4bool hl) { _icm = hl; };
//            void SetRDM(G4bool hl) { _rdm = hl; };
//            void SetHL(G4double hl) { _max_hl = hl; };
//         Changed in CreateTransition() from 
//                     return new G4DiscreteGammaTransition(*level);  
//                 To
//                     return new G4DiscreteGammaTransition(*level,Z);
//         Added in CanDoTransition
//                if (level->HalfLife() > _max_hl && !_rdm ) canDo = false;
//
//              3 November 2011 L. Desorgher
//                      remove the   Z<= 98  limit
//      
// -------------------------------------------------------------------

#include "G4DiscreteGammaDeexcitation.hh"
#include "G4DiscreteGammaTransition.hh"
#include "G4NuclearLevelManager.hh"
#include "G4NuclearLevelStore.hh"
#include "G4SystemOfUnits.hh"

G4DiscreteGammaDeexcitation::G4DiscreteGammaDeexcitation(): 
  nucleusZ(0), nucleusA(0), maxhl(1e-6*CLHEP::second), icm(false),
  rdm(false), levelManager(0), dtransition(0)
{
  store = G4NuclearLevelStore::GetInstance();
}

G4DiscreteGammaDeexcitation::~G4DiscreteGammaDeexcitation() 
{}

G4bool G4DiscreteGammaDeexcitation::CanDoTransition(G4Fragment* nucleus) 
{
  G4int Z = nucleus->GetZ_asInt();
  G4int A = nucleus->GetA_asInt();
  G4double excitation = nucleus->GetExcitationEnergy();

  if(excitation <= _tolerance) {
    if (_verbose > 1) { 
      G4cout << "G4DiscreteGammaDeexcitation::CanDoTransition fails; Z= " << Z
             << " A= " << A << " Eex(meV)= " << excitation/MeV << G4endl;
    }
    return false;
  }

  if (nucleusA != A || nucleusZ != Z) {
    levelManager = store->GetManager(Z,A);
    nucleusA = A;
    nucleusZ = Z;
  }
  if(!levelManager ||
     excitation > levelManager->MaxLevelEnergy() + _tolerance) { return false; }

  if (_verbose > 1) {
    G4cout << "G4DiscreteGammaDeexcitation::CanDoTransition "
           << " Z= " << Z << "  A= " << A << " Eex= " << excitation
           << G4endl;
  }

  const G4NuclearLevel* level = levelManager->NearestLevel(excitation);

  // long lived level   
  if (!level || level->HalfLife() > maxhl) { return false; }
  //  if (!level || (level->HalfLife() > maxhl && !rdm) ) { return false; }

  if (_verbose > 1) {
    G4cout << "G4DiscreteGammaDeexcitation: Elevel(MeV)= " 
           << level->Energy()/MeV << ", Eex(MeV)= " << excitation << G4endl;
  }
  if(!_transition) {
    dtransition = new G4DiscreteGammaTransition(level,Z,_verbose);
    dtransition->SetICM(icm);  
    _transition = dtransition;
  } else {
    dtransition->Update(level,Z);
  }
  // control on ICM
  if(level->HalfLife() > _timeLimit) {
    dtransition->SetICM(true);
  } else {
    dtransition->SetICM(icm);  
  }  

  dtransition->SetEnergyFrom(excitation);
  
  if (_verbose > 1) {
    G4cout << "CanDoTransition done: Eex(MeV)= " 
           << excitation/MeV << ", level enrgies: Emin(MeV)= " 
           << levelManager->MinLevelEnergy()/MeV << " Emax(MeV)= "
           << levelManager->MaxLevelEnergy()/MeV << G4endl;
  }
  return true;
}