G4H2O.cc

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00025 //
00026 // $Id: G4H2O.cc 64057 2012-10-30 15:04:49Z gcosmo $
00027 //
00028 // Author: Mathieu Karamitors 
00029 //
00030 // History:
00031 // -----------
00032 // 10 Oct 2011 M.Karamitros created
00033 //
00034 // -------------------------------------------------------------------
00035 
00036 #include "G4H2O.hh"
00037 #include "G4PhysicalConstants.hh"
00038 #include "G4SystemOfUnits.hh"
00039 #include "G4ParticleTable.hh"
00040 
00041 // ######################################################################
00042 // ###                         Hydrogen                               ###
00043 // ######################################################################
00044 G4H2O* G4H2O::theInstance = 0;
00045 
00046 G4H2O* G4H2O::Definition()
00047 {
00048     if (theInstance !=0) return theInstance;
00049     const G4String name = "H_{2}O";
00050     // search in particle table]
00051     G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
00052     G4ParticleDefinition* anInstance = pTable->FindParticle(name);
00053     if (anInstance ==0)
00054     {
00055         // create molecule
00056         //
00057 //        G4MoleculeDefinition(G4String name,
00058 //                             G4double mass,
00059 //                             G4int    electronsNumber,
00060 //                             G4int    electronicLevels,
00061 //                             G4double diffCoeff,
00062 //                             G4int atomsNumber = -1,
00063 //                             G4double radius = -1,
00064 //                             G4double lifetime = -1,
00065 //                             G4String aType = "",
00066 //                             G4MoleculeID ID = G4MoleculeID::Create()
00067 //                             );
00068 
00069         G4double mass = 18.0153*g/Avogadro * c_squared;
00070         anInstance = new G4MoleculeDefinition(name, mass, 10, 8,
00071                                               2e-5*(cm*cm/s),
00072                                               3, 2.75 * angstrom, picosecond);
00073 
00074         ((G4MoleculeDefinition*) anInstance) ->SetLevelOccupation(0);
00075         ((G4MoleculeDefinition*) anInstance) ->SetLevelOccupation(1);
00076         ((G4MoleculeDefinition*) anInstance) ->SetLevelOccupation(2);
00077         ((G4MoleculeDefinition*) anInstance) ->SetLevelOccupation(3);
00078         ((G4MoleculeDefinition*) anInstance) ->SetLevelOccupation(4);
00079 
00080     }
00081     theInstance = reinterpret_cast<G4H2O*>(anInstance);
00082     return theInstance;
00083 }
00084 

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