G4HadronElasticPhysicsXS.cc

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// $Id$
//
//---------------------------------------------------------------------------
//
// ClassName:   G4HadronElasticPhysicsXS
//
// Author: 3 June 2010 V. Ivanchenko
//
// Modified:
// 03.06.2011 V.Ivanchenko change design - now first default constructor 
//            is called, XS cross section is added on top
//
//----------------------------------------------------------------------------
//
// XS cross sections for neutrons

#include "G4HadronElasticPhysicsXS.hh"
#include "G4HadronElasticPhysics.hh"
#include "G4HadronicProcessType.hh"
#include "G4HadronicProcess.hh"
#include "G4ProcessManager.hh"
#include "G4VCrossSectionDataSet.hh"
#include "G4Neutron.hh"
#include "G4Proton.hh"
#include "G4PionPlus.hh"
#include "G4PionMinus.hh"
#include "G4BGGNucleonElasticXS.hh"
#include "G4BGGPionElasticXS.hh"
#include "G4NeutronElasticXS.hh"

// factory
#include "G4PhysicsConstructorFactory.hh"
//
G4_DECLARE_PHYSCONSTR_FACTORY(G4HadronElasticPhysicsXS);


G4HadronElasticPhysicsXS::G4HadronElasticPhysicsXS(G4int ver)
  : G4VPhysicsConstructor("hElasticWEL_CHIPS_XS"), verbose(ver), 
    wasActivated(false)
{
  if(verbose > 1) { 
    G4cout << "### G4HadronElasticPhysicsHP: " << GetPhysicsName() 
           << G4endl; 
  }
  mainElasticBuilder = new G4HadronElasticPhysics(verbose);
}

G4HadronElasticPhysicsXS::~G4HadronElasticPhysicsXS()
{
  delete mainElasticBuilder;
}

void G4HadronElasticPhysicsXS::ConstructParticle()
{
  // G4cout << "G4HadronElasticPhysics::ConstructParticle" << G4endl;
  mainElasticBuilder->ConstructParticle();
}

void G4HadronElasticPhysicsXS::ConstructProcess()
{
  if(wasActivated) { return; }
  wasActivated = true;

  mainElasticBuilder->ConstructProcess();

  mainElasticBuilder->GetNeutronProcess()->
    AddDataSet(new G4NeutronElasticXS());

  const G4ParticleDefinition* part = G4Proton::Proton();
  AddXSection(part, new G4BGGNucleonElasticXS(part));
  /*
  part = G4PionPlus::PionPlus();
  AddXSection(part, new G4BGGPionElasticXS(part));

  part = G4PionMinus::PionMinus();
  AddXSection(part, new G4BGGPionElasticXS(part));
  */

  if(verbose > 1) { 
    G4cout << "### G4HadronElasticPhysicsXS is constructed " 
           << G4endl; 
  }
}

void 
G4HadronElasticPhysicsXS::AddXSection(const G4ParticleDefinition* part,
                                      G4VCrossSectionDataSet* cross) 
{
  G4ProcessVector* pv = part->GetProcessManager()->GetPostStepProcessVector();
  size_t n = pv->size();
  if(0 < n) {
    for(size_t i=0; i<n; ++i) {
      if((*pv)[i]->GetProcessSubType() == fHadronElastic) {
        G4HadronicProcess* hp = static_cast<G4HadronicProcess*>((*pv)[i]);
        hp->AddDataSet(cross);
        return;
      }
    }
  }
}

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