Geant4  10.02.p01
G4H2O.cc
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26 // $Id: G4H2O.cc 85244 2014-10-27 08:24:13Z gcosmo $
27 //
28 // Author: Mathieu Karamitors
29 //
30 // History:
31 // -----------
32 // 10 Oct 2011 M.Karamitros created
33 //
34 // -------------------------------------------------------------------
35 
36 #include "G4H2O.hh"
37 #include "G4PhysicalConstants.hh"
38 #include "G4SystemOfUnits.hh"
39 #include "G4ParticleTable.hh"
40 
41 // ######################################################################
42 // ### Hydrogen ###
43 // ######################################################################
45 
47 {
48  if (theInstance != 0) return theInstance;
49 
50  const G4String name = "H2O";
51  // search in particle table]
53  G4ParticleDefinition* anInstance = pTable->FindParticle(name);
54 
55  if (anInstance == 0)
56  {
57  const G4String formatedName = "H_{2}O";
58 
59  // create molecule
60  //
61  // G4MoleculeDefinition(const G4String& name,
62  // G4double mass,
63  // G4double diffCoeff,
64  // G4int charge = 0,
65  // G4int electronicLevels = 0,
66  // G4double radius = -1,
67  // G4int atomsNumber = -1,
68  // G4double lifetime = -1,
69  // G4String aType = "",
70  // G4FakeParticleID ID = G4FakeParticleID::Create()
71  // );
72 
73  G4double mass = 18.0153 * g / Avogadro * c_squared;
74  anInstance = new G4MoleculeDefinition(name, mass, 2e-5 * (cm * cm / s),
75  0, // charge
76  8, 2.75 * angstrom, 3,
77  0 /*lifetime*/); //picosecond set in dissociation process
78 
79  ((G4MoleculeDefinition*) anInstance)->SetLevelOccupation(0);
80  ((G4MoleculeDefinition*) anInstance)->SetLevelOccupation(1);
81  ((G4MoleculeDefinition*) anInstance)->SetLevelOccupation(2);
82  ((G4MoleculeDefinition*) anInstance)->SetLevelOccupation(3);
83  ((G4MoleculeDefinition*) anInstance)->SetLevelOccupation(4);
84  ((G4MoleculeDefinition*) anInstance)->SetFormatedName(formatedName);
85 
86  }
87  theInstance = reinterpret_cast<G4H2O*>(anInstance);
88  return theInstance;
89 }
90 
static const double cm
Definition: G4SIunits.hh:118
G4ParticleDefinition * FindParticle(G4int PDGEncoding)
static G4H2O * Definition()
Definition: G4H2O.cc:46
G4String name
Definition: TRTMaterials.hh:40
static G4H2O * theInstance
Definition: G4H2O.hh:62
static const double s
Definition: G4SIunits.hh:168
static G4ParticleTable * GetParticleTable()
static const double g
Definition: G4SIunits.hh:180
Definition: G4H2O.hh:59
double G4double
Definition: G4Types.hh:76
static const double angstrom
Definition: G4SIunits.hh:101