G4Oxygen.cc

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/*
 * G4Oxygen.cc
 *
 *  Created on: Jul 23, 2019
 *      Author: W. G. Shin
 *              J. Ramos-Mendez and B. Faddegon
*/
 
#include "G4Oxygen.hh"
#include "G4PhysicalConstants.hh"
#include "G4SystemOfUnits.hh"
#include "G4ParticleTable.hh"
 
// ######################################################################
// ###                         Oxygen                               ###
// ######################################################################
G4Oxygen* G4Oxygen::theInstance = 0;
 
G4Oxygen* G4Oxygen::Definition()
{
  if (theInstance != 0) return theInstance;
  const G4String name = "O";
  // search in particle table]
  G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
  G4ParticleDefinition* anInstance = pTable->FindParticle(name);
//    G4ParticleDefinition* anInstance = 0;
  if (anInstance == 0)
  {
    const G4String formatedName = "O";
 
    // 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 = 15.99773 * g / Avogadro * c_squared;
    anInstance = new G4MoleculeDefinition(name, mass, 2.0e-9 * (m * m / s), 0, 0,
                                          2.0 * angstrom, 1);
    ((G4MoleculeDefinition*) anInstance)->SetLevelOccupation(0); // Set 2 electrons on 1 single occupancy
    ((G4MoleculeDefinition*) anInstance)->SetFormatedName(formatedName);
  }
  theInstance = static_cast<G4Oxygen*>(anInstance);
  return theInstance;
}