G4QGSPPionBuilder.cc

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// $Id$
//
//---------------------------------------------------------------------------
//
// ClassName:   G4QGSPPionBuilder
//
// Author: 2010 G.Folger
//  devired from G4QGSPPiKBuilder
//
// Modified:
// 17.11.2010 G.Folger, use G4CrossSectionPairGG for relativistic rise of cross
//             section at high energies.
// 30.03.2009 V.Ivanchenko create cross section by new
//
//----------------------------------------------------------------------------
//
#include "G4QGSPPionBuilder.hh"
#include "G4SystemOfUnits.hh"
#include "G4ParticleDefinition.hh"
#include "G4ParticleTable.hh"
#include "G4ProcessManager.hh"
#include "G4PiNuclearCrossSection.hh"
#include "G4CrossSectionPairGG.hh"

G4QGSPPionBuilder::
G4QGSPPionBuilder(G4bool quasiElastic, G4bool projectileDiffraction) 
{
  thePiData = new G4CrossSectionPairGG(new G4PiNuclearCrossSection(), 91*GeV);
  theMin = 12*GeV;
  theModel = new G4TheoFSGenerator("QGSP");

  theStringModel = new G4QGSModel< G4QGSParticipants >;
  theStringDecay = new G4ExcitedStringDecay(theQGSM = new G4QGSMFragmentation);
  theStringModel->SetFragmentationModel(theStringDecay);
  

  theCascade = new G4GeneratorPrecompoundInterface;
  thePreEquilib = new G4PreCompoundModel(theHandler = new G4ExcitationHandler);
  theCascade->SetDeExcitation(thePreEquilib);  

  theModel->SetHighEnergyGenerator(theStringModel);
  if (quasiElastic)
  {
     theQuasiElastic=new G4QuasiElasticChannel;
     theModel->SetQuasiElasticChannel(theQuasiElastic);
  } else 
  {  theQuasiElastic=0;}
  if ( projectileDiffraction )
  {
     theProjectileDiffraction=new G4ProjectileDiffractiveChannel;
     theModel->SetProjectileDiffraction(theProjectileDiffraction);
  } else 
  {  theProjectileDiffraction=0;}
   
  theModel->SetTransport(theCascade);
}
 
G4QGSPPionBuilder::
~G4QGSPPionBuilder() 
{
  delete theCascade;
  delete thePreEquilib;
  if ( theQuasiElastic ) delete theQuasiElastic;
  if ( theProjectileDiffraction ) delete theProjectileDiffraction;
  delete theStringDecay;
  delete theStringModel;
  delete theModel;
  delete theQGSM;
  //delete theHandler;
}

void G4QGSPPionBuilder::
Build(G4HadronElasticProcess * ) {}

void G4QGSPPionBuilder::
Build(G4PionPlusInelasticProcess * aP)
{
  theModel->SetMinEnergy(theMin);
  theModel->SetMaxEnergy(100*TeV);
  aP->AddDataSet(thePiData);
  aP->RegisterMe(theModel);
}

void G4QGSPPionBuilder::
Build(G4PionMinusInelasticProcess * aP)
{
  theModel->SetMinEnergy(theMin);
  theModel->SetMaxEnergy(100*TeV);
  aP->AddDataSet(thePiData);
  aP->RegisterMe(theModel);
}


// 2002 by J.P. Wellisch

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