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// $Id: HadrontherapyHadronUElastic.cc; May 2005
// ----------------------------------------------------------------------------
//                 GEANT 4 - Hadrontherapy example
// ----------------------------------------------------------------------------
// Code developed by:
//
// G.A.P. Cirrone(a)*, F. Di Rosa(a), S. Guatelli(b), G. Russo(a)
// 
// (a) Laboratori Nazionali del Sud 
//     of the INFN, Catania, Italy
// (b) INFN Section of Genova, Genova, Italy
// 
// * cirrone@lns.infn.it
// ----------------------------------------------------------------------------

#include "HEHadronIonUElastic.hh"
#include "G4ParticleDefinition.hh"
#include "G4ProcessManager.hh"
#include "G4UHadronElasticProcess.hh"
#include "G4HadronElastic.hh"
#include "G4VQCrossSection.hh"


HEHadronIonUElastic::HEHadronIonUElastic(const G4String& name): 
   G4VPhysicsConstructor(name)
{
  G4cout<< "HADRONIC ELASTIC PROCESS(ES): G4UHadronElasticProcess (all considered hadrons and ions)" 
        << G4endl
        << "APPLIED MODEL(S): G4HadronElastic" 
        << G4endl;
 
  model = 0;
}

HEHadronIonUElastic::~HEHadronIonUElastic()
{
  delete model;
}

void HEHadronIonUElastic::ConstructProcess()
{
  G4ParticleDefinition* particle = 0;
  G4ProcessManager* processManager = 0;

  // **********************************************
  // *** Proton, Neutron, Pion plus, Pion minus ***
  // *** Deuteron, Triton, Alpha                ***
  // **********************************************

  G4UHadronElasticProcess* hadronIonElasticProcess = new G4UHadronElasticProcess("elasticProcess", false);     
  
  G4double hadronIonElasticMinEnergy = 0. * keV;
  G4double hadronIonElasticMaxEnergy = 100. * TeV;

  G4HadronElastic* hadronIonElasticModel = new G4HadronElastic();
  hadronIonElasticModel -> SetMinEnergy(hadronIonElasticMinEnergy);
  hadronIonElasticModel -> SetMaxEnergy(hadronIonElasticMaxEnergy);

  G4VQCrossSection* hadronIonElasticCrossSection = hadronIonElasticModel->GetCS();

  hadronIonElasticProcess -> SetQElasticCrossSection(hadronIonElasticCrossSection);
  hadronIonElasticProcess -> RegisterMe(hadronIonElasticModel);

  theParticleIterator -> reset();

  while( (*theParticleIterator)() )
  {
    particle = theParticleIterator -> value();
    G4String particleName = particle -> GetParticleName();

    if(particleName == "neutron"   || 
       particleName == "pi-"       || 
       particleName == "pi+"       || 
       particleName == "proton"    || 
       particleName == "alpha"     ||
       particleName == "deuteron"  ||
       particleName == "triton") 
      
      {
	processManager = particle -> GetProcessManager();
	processManager -> AddDiscreteProcess(hadronIonElasticProcess);
      } 
  }

}