G4OH.cc

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//
// Author: Mathieu Karamitors 
//
// History:
// -----------
// 10 Oct 2011 M.Karamitros created
//
// -------------------------------------------------------------------

#include "G4OH.hh"
#include "G4PhysicalConstants.hh"
#include "G4SystemOfUnits.hh"
#include "G4ParticleTable.hh"

// ######################################################################
// ###                         Hydroxyl                               ###
// ######################################################################
G4OH* G4OH::theInstance = 0;

G4OH* G4OH::Definition()
{
  if (theInstance != 0) return theInstance;
  const G4String name = "OH";
  // search in particle table]
  G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
  G4ParticleDefinition* anInstance = pTable->FindParticle(name);
  if (anInstance == 0)
  {
    // create molecule
    //
    //    G4MoleculeDefinition(const G4String& name,
    //        G4double mass,
    //        G4double diffCoeff,
    //        G4int    charge = 0,
    //        G4int    electronicLevels = 0,
    //        G4double radius = -1,
    //        G4int    atomsNumber = -1,
    //        G4double lifetime = -1,
    //        G4String aType = "",
    //        G4FakeParticleID ID = G4FakeParticleID::Create()
    //    );

    G4double mass = 17.00734 * g / Avogadro * c_squared;
    anInstance = new G4MoleculeDefinition(name, mass, 2.8e-9 * (m * m / s), 0,
                                          5, 0.958 * angstrom, // radius
                                          2 // number of atoms
                                          );

    ((G4MoleculeDefinition*) anInstance)->SetLevelOccupation(0);
    ((G4MoleculeDefinition*) anInstance)->SetLevelOccupation(1);
    ((G4MoleculeDefinition*) anInstance)->SetLevelOccupation(2);
    ((G4MoleculeDefinition*) anInstance)->SetLevelOccupation(3, 3);
    ((G4MoleculeDefinition*) anInstance)->SetFormatedName("OH");
  }
  theInstance = reinterpret_cast<G4OH*>(anInstance);
  return theInstance;
}