G4O2.cc

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/*
 * G4O2.cc
 *
 *  Created on: Jul 23, 2019
 *      Author: W. G. Shin
 *              J. Ramos-Mendez and B. Faddegon
*/
 
#include "G4O2.hh"
#include "G4PhysicalConstants.hh"
#include "G4SystemOfUnits.hh"
#include "G4ParticleTable.hh"
 
// ######################################################################
// ###                         Oxygen molecule                               ###
// ######################################################################
G4O2* G4O2::theInstance = 0;
 
G4O2* G4O2::Definition()
{
  if (theInstance != 0) return theInstance;
  const G4String name = "O_2";
  // search in particle table]
  G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
  G4ParticleDefinition* anInstance = pTable->FindParticle(name);
  if (anInstance == 0)
  {
    const G4String formatedName = "O_{2}";
 
    // 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 = 31.99546 * g / Avogadro * c_squared;
    anInstance = new G4MoleculeDefinition(name, mass, 2.4e-9 * (m * m / s), 0, 0,
                                          1.7 * angstrom, 2);
 
    ((G4MoleculeDefinition*) anInstance)->SetLevelOccupation(0); // not implemented
    ((G4MoleculeDefinition*) anInstance)->SetFormatedName(formatedName);
  }
  theInstance = reinterpret_cast<G4O2*>(anInstance);
  return theInstance;
}