G4H2O.cc

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//
// $Id: G4H2O.cc 64057 2012-10-30 15:04:49Z gcosmo $
//
// Author: Mathieu Karamitors 
//
// History:
// -----------
// 10 Oct 2011 M.Karamitros created
//
// -------------------------------------------------------------------
 
#include "G4H2O.hh"
#include "G4PhysicalConstants.hh"
#include "G4SystemOfUnits.hh"
#include "G4ParticleTable.hh"
 
// ######################################################################
// ###                         Hydrogen                               ###
// ######################################################################
G4H2O* G4H2O::theInstance = 0;
 
G4H2O* G4H2O::Definition()
{
    if (theInstance !=0) return theInstance;
    const G4String name = "H_{2}O";
    // search in particle table]
    G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
    G4ParticleDefinition* anInstance = pTable->FindParticle(name);
    if (anInstance ==0)
    {
        // create molecule
        //
//        G4MoleculeDefinition(G4String name,
//                             G4double mass,
//                             G4int    electronsNumber,
//                             G4int    electronicLevels,
//                             G4double diffCoeff,
//                             G4int atomsNumber = -1,
//                             G4double radius = -1,
//                             G4double lifetime = -1,
//                             G4String aType = "",
//                             G4MoleculeID ID = G4MoleculeID::Create()
//                             );
 
        G4double mass = 18.0153*g/Avogadro * c_squared;
        anInstance = new G4MoleculeDefinition(name, mass, 10, 8,
                                              2e-5*(cm*cm/s),
                                              3, 2.75 * angstrom, picosecond);
 
        ((G4MoleculeDefinition*) anInstance) ->SetLevelOccupation(0);
        ((G4MoleculeDefinition*) anInstance) ->SetLevelOccupation(1);
        ((G4MoleculeDefinition*) anInstance) ->SetLevelOccupation(2);
        ((G4MoleculeDefinition*) anInstance) ->SetLevelOccupation(3);
        ((G4MoleculeDefinition*) anInstance) ->SetLevelOccupation(4);
 
    }
    theInstance = reinterpret_cast<G4H2O*>(anInstance);
    return theInstance;
}