G4PhotonEvaporation.cc

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// $Id$
//
// -------------------------------------------------------------------
//      GEANT 4 class file 
//
//      CERN, Geneva, Switzerland
//
//      File name:     G4PhotonEvaporation
//
//      Author:        Maria Grazia Pia (pia@genova.infn.it)
// 
//      Creation date: 23 October 1998
//
// Modifications: 
//      
// 8 March 2002, Fan Lei (flei@space.qinetiq.com)
//   
//        Implementation of Internal Convertion process in discrete deexcitation
//        The following public methods have been added. 
//
//       void SetICM (G4bool);
//       void CallFromRDM(G4bool);
//       void SetMaxHalfLife(G4double) ;
//       void SetEOccupancy( G4ElectronOccupancy  eOccupancy) ;
//       G4ElectronOccupancy GetEOccupancy () ;
//
// 11 May 2010, V.Ivanchenko add implementation of EmittedFragment and 
//                           BreakUpFragment methods; cleanup logic
//
// -------------------------------------------------------------------
//

#include "G4PhotonEvaporation.hh"

#include "globals.hh"
#include "G4SystemOfUnits.hh"
#include "Randomize.hh"
#include "G4Gamma.hh"
#include "G4LorentzVector.hh"
#include "G4VGammaTransition.hh"
#include "G4Fragment.hh"
#include "G4FragmentVector.hh"
#include "G4ContinuumGammaDeexcitation.hh"
#include "G4DiscreteGammaDeexcitation.hh"
#include "G4E1Probability.hh"

G4PhotonEvaporation::G4PhotonEvaporation()
  :_verbose(0),_myOwnProbAlgorithm (true),
   _eOccupancy(0), _vShellNumber(-1),_gammaE(0.)
{ 
  _probAlgorithm = new G4E1Probability;

  G4double timeLimit = DBL_MAX;
  char* env = getenv("G4AddTimeLimitToPhotonEvaporation"); 
  if(env) { timeLimit = 1.e-16*second; }

  G4DiscreteGammaDeexcitation* p = new G4DiscreteGammaDeexcitation();
  p->SetICM(false);
  p->SetTimeLimit(timeLimit);

  _discrDeexcitation = p;
  _contDeexcitation = new G4ContinuumGammaDeexcitation;
  _nucleus = 0;
}

G4PhotonEvaporation::~G4PhotonEvaporation()
{ 
  if(_myOwnProbAlgorithm) delete _probAlgorithm;
  delete _discrDeexcitation;
  delete _contDeexcitation;
}

G4Fragment* G4PhotonEvaporation::EmittedFragment(G4Fragment* nucleus)
{
  //G4cout << "G4PhotonEvaporation::EmittedFragment" << G4endl;
  _nucleus = nucleus;
  
  // Do one photon emission by the continues deexcitation  
  _contDeexcitation->SetNucleus(_nucleus);
  _contDeexcitation->Initialize();

  if(_contDeexcitation->CanDoTransition()) {  
    G4Fragment* gamma = _contDeexcitation->GenerateGamma();
    if(gamma) { 
      if (_verbose > 0) {
        G4cout << "G4PhotonEvaporation::EmittedFragment continium deex: "   
               << gamma << G4endl;
        G4cout << "   Residual: " << nucleus << G4endl;
      }
      return gamma; 
    }
  }

  // Do one photon emission by the discrete deexcitation 
  _discrDeexcitation->SetNucleus(_nucleus);
  _discrDeexcitation->Initialize();

  if(_discrDeexcitation->CanDoTransition()) {  
    G4Fragment* gamma = _discrDeexcitation->GenerateGamma();
    if(gamma) { 
      if (_verbose > 0) {
        G4cout << "G4PhotonEvaporation::EmittedFragment discrete deex: "   
               << gamma << G4endl;
        G4cout << "   Residual: " << nucleus << G4endl;
      }
      return gamma; 
    }
  }

  if (_verbose > 0) {
    G4cout << "G4PhotonEvaporation unable emit gamma: " 
           << nucleus << G4endl;
  }
  return 0;
}

G4FragmentVector* G4PhotonEvaporation::BreakUpFragment(G4Fragment* nucleus)
{
  //G4cout << "G4PhotonEvaporation::BreakUpFragment" << G4endl;
  // The same pointer of primary nucleus
  _nucleus = nucleus;
  _contDeexcitation->SetNucleus(_nucleus);
  _discrDeexcitation->SetNucleus(_nucleus);

  // Do the whole gamma chain 
  G4FragmentVector* products = _contDeexcitation->DoChain();  
  if( !products ) { products = new G4FragmentVector(); }

  if (_verbose > 0) {
    G4cout << "G4PhotonEvaporation::BreakUpFragment " << products->size() 
           << " gammas from ContinuumDeexcitation " << G4endl;
    G4cout << "   Residual: " << nucleus << G4endl;
  }
  // Products from discrete gamma transitions
  G4FragmentVector* discrProducts = _discrDeexcitation->DoChain();
  if(discrProducts) {
    _eOccupancy = _discrDeexcitation->GetEO();
    _vShellNumber = _discrDeexcitation->GetVacantSN();

    // not sure if the following line is needed!
    _discrDeexcitation->SetVaccantSN(-1);

    if (_verbose > 0) {
      G4cout << "G4PhotonEvaporation::BreakUpFragment " << discrProducts->size() 
             << " gammas from DiscreteDeexcitation " << G4endl;
      G4cout << "   Residual: " << nucleus << G4endl;
    }
    G4FragmentVector::iterator i;
    for (i = discrProducts->begin(); i != discrProducts->end(); ++i)
      {
        products->push_back(*i);
      }
    delete discrProducts;
  }

  if (_verbose > 0) {
    G4cout << "*-*-* Photon evaporation: " << products->size() << G4endl;
  }
  return products;
}

G4FragmentVector* G4PhotonEvaporation::BreakUp(const G4Fragment& nucleus)
{
  //G4cout << "G4PhotonEvaporation::BreakUp" << G4endl;
  _nucleus = new G4Fragment(nucleus);

  _contDeexcitation->SetNucleus(_nucleus);
  _discrDeexcitation->SetNucleus(_nucleus);
  
  // Do one photon emission

  // Products from continuum gamma transitions

  G4FragmentVector* products = _contDeexcitation->DoTransition();  
  if( !products ) { products = new G4FragmentVector(); }
  else if(_verbose > 0) {
    G4cout << "G4PhotonEvaporation::BreakUp " << products->size() 
           << " gammas from ContinuesDeexcitation " << G4endl;
    G4cout << "   Residual: " << nucleus << G4endl;
  }

  if (0 == products->size())
    {
      // Products from discrete gamma transitions
      G4FragmentVector* discrProducts = _discrDeexcitation->DoTransition();

      if (discrProducts) {
        _eOccupancy = _discrDeexcitation->GetEO();
        _vShellNumber = _discrDeexcitation->GetVacantSN();

        // not sure if the following line is needed!
        _discrDeexcitation->SetVaccantSN(-1);
        //
        if (_verbose > 0) {
          G4cout << " = BreakUp = " << discrProducts->size() 
                 << " gammas from DiscreteDeexcitation " 
                 << G4endl;
          G4cout << "   Residual: " << nucleus << G4endl;
        }
        G4FragmentVector::iterator i;
        for (i = discrProducts->begin(); i != discrProducts->end(); ++i)
          {
            products->push_back(*i);
          }
        delete discrProducts;
      }
    }
  
  // Add deexcited nucleus to products
  products->push_back(_nucleus);

  if (_verbose > 0) {
    G4cout << "*-*-*-* Photon evaporation: " << products->size() << G4endl;
  }

  return products;
}

G4FragmentVector* G4PhotonEvaporation::BreakItUp(const G4Fragment& nucleus)
{
  // The same pointer of primary nucleus
  _nucleus = new G4Fragment(nucleus);
  _contDeexcitation->SetNucleus(_nucleus);
  _discrDeexcitation->SetNucleus(_nucleus);

  //G4cout << "G4PhotonEvaporation::BreakItUp:  " << nucleus << G4endl;

  // Do the whole gamma chain 
  G4FragmentVector* products = _contDeexcitation->DoChain();  
  if( !products ) { products = new G4FragmentVector; }

  // Products from continuum gamma transitions
  if (_verbose > 0) {
    G4cout << " = BreakItUp = " << products->size()
           << " gammas from ContinuumDeexcitation " << G4endl;
  }

  // Products from discrete gamma transitions
  G4FragmentVector* discrProducts = _discrDeexcitation->DoChain();
  if(discrProducts) {
    _eOccupancy = _discrDeexcitation->GetEO();
    _vShellNumber = _discrDeexcitation->GetVacantSN();

    // not sure if the following line is needed!
    _discrDeexcitation->SetVaccantSN(-1);

    if (_verbose > 0) {
      G4cout << " = BreakItUp = " << discrProducts->size() 
             << " gammas from DiscreteDeexcitation " << G4endl;
    }
    G4FragmentVector::iterator i;
    for (i = discrProducts->begin(); i != discrProducts->end(); ++i)
      {
        products->push_back(*i);
      }
    delete discrProducts;
  }
  // Add deexcited nucleus to products
  products->push_back(_nucleus);

  if (_verbose > 0) {
    G4cout << "*-*-* Photon evaporation: " << products->size() << G4endl;
  }
  return products;
}

G4double 
G4PhotonEvaporation::GetEmissionProbability(G4Fragment* theNucleus)
{
  _nucleus = theNucleus;
  G4double prob = 
    _probAlgorithm->EmissionProbability(*_nucleus,_nucleus->GetExcitationEnergy());
  return prob;
}


void G4PhotonEvaporation::SetEmissionStrategy(G4VEmissionProbability * probAlgorithm)
{

  // CD - not sure about always wanting to delete this pointer....

  if(_myOwnProbAlgorithm) delete _probAlgorithm;

  _probAlgorithm = probAlgorithm;

  _myOwnProbAlgorithm = false;
}


void G4PhotonEvaporation::SetVerboseLevel(G4int verbose)
{
  _verbose = verbose;
  _contDeexcitation->SetVerboseLevel(verbose);
  _discrDeexcitation->SetVerboseLevel(verbose);
}

void G4PhotonEvaporation::SetICM(G4bool ic)
{
 (static_cast <G4DiscreteGammaDeexcitation*> (_discrDeexcitation))->SetICM(ic);
}

void G4PhotonEvaporation::SetMaxHalfLife(G4double hl)
{
 (static_cast <G4DiscreteGammaDeexcitation*> (_discrDeexcitation))->SetHL(hl);
}

void G4PhotonEvaporation::SetTimeLimit(G4double val)
{
 _discrDeexcitation->SetTimeLimit(val);
}

void G4PhotonEvaporation::RDMForced(G4bool fromRDM)
{
 (static_cast <G4DiscreteGammaDeexcitation*> (_discrDeexcitation))->SetRDM(fromRDM);
}

void G4PhotonEvaporation::SetEOccupancy(G4ElectronOccupancy eo)
{
  _discrDeexcitation->SetEO(eo);
}

#ifdef debug
void G4PhotonEvaporation::CheckConservation(const G4Fragment & theInitialState,
                                            G4FragmentVector * Result) const
{
  G4double ProductsEnergy =0;
  G4ThreeVector ProductsMomentum;
  G4int ProductsA = 0;
  G4int ProductsZ = 0;
  G4FragmentVector::iterator h;
  for (h = Result->begin(); h != Result->end(); h++) {
    G4LorentzVector tmp = (*h)->GetMomentum();
    ProductsEnergy += tmp.e();
    ProductsMomentum += tmp.vect();
    ProductsA += (*h)->GetA_asInt();
    ProductsZ += (*h)->GetZ_asInt();
  }

  if (ProductsA != theInitialState.GetA_asInt()) {
    G4cout << "!!!!!!!!!! Baryonic Number Conservation Violation !!!!!!!!!!" << G4endl;
    G4cout << "G4PhotonEvaporation.cc: Barionic Number Conservation test for evaporation fragments" 
           << G4endl; 
    G4cout << "Initial A = " << theInitialState.GetA_asInt() 
           << "   Fragments A = " << ProductsA << "   Diference --> " 
           << theInitialState.GetA_asInt() - ProductsA << G4endl;
  }
  if (ProductsZ != theInitialState.GetZ_asInt()) {
    G4cout << "!!!!!!!!!! Charge Conservation Violation !!!!!!!!!!" << G4endl;
    G4cout << "G4PhotonEvaporation.cc: Charge Conservation test for evaporation fragments" 
           << G4endl; 
    G4cout << "Initial Z = " << theInitialState.GetZ_asInt() 
           << "   Fragments Z = " << ProductsZ << "   Diference --> " 
           << theInitialState.GetZ_asInt() - ProductsZ << G4endl;
  }
  if (std::abs(ProductsEnergy-theInitialState.GetMomentum().e()) > 1.0*keV) {
    G4cout << "!!!!!!!!!! Energy Conservation Violation !!!!!!!!!!" << G4endl;
    G4cout << "G4PhotonEvaporation.cc: Energy Conservation test for evaporation fragments" 
           << G4endl; 
    G4cout << "Initial E = " << theInitialState.GetMomentum().e()/MeV << " MeV"
           << "   Fragments E = " << ProductsEnergy/MeV  << " MeV   Diference --> " 
           << (theInitialState.GetMomentum().e() - ProductsEnergy)/MeV << " MeV" << G4endl;
  } 
  if (std::abs(ProductsMomentum.x()-theInitialState.GetMomentum().x()) > 1.0*keV || 
      std::abs(ProductsMomentum.y()-theInitialState.GetMomentum().y()) > 1.0*keV ||
      std::abs(ProductsMomentum.z()-theInitialState.GetMomentum().z()) > 1.0*keV) {
    G4cout << "!!!!!!!!!! Momentum Conservation Violation !!!!!!!!!!" << G4endl;
    G4cout << "G4PhotonEvaporation.cc: Momentum Conservation test for evaporation fragments" 
           << G4endl; 
    G4cout << "Initial P = " << theInitialState.GetMomentum().vect() << " MeV"
           << "   Fragments P = " << ProductsMomentum  << " MeV   Diference --> " 
           << theInitialState.GetMomentum().vect() - ProductsMomentum << " MeV" << G4endl;
  }
  return;
}
#endif

---