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G4Hydrogen.cc
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26 // $Id: G4Hydrogen.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 "G4Hydrogen.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  const G4String name = "H";
50  // search in particle table]
52  G4ParticleDefinition* anInstance = pTable->FindParticle(name);
53  if (anInstance == 0)
54  {
55  // create molecule
56  //
57  // G4MoleculeDefinition(const G4String& name,
58  // G4double mass,
59  // G4double diffCoeff,
60  // G4int charge = 0,
61  // G4int electronicLevels = 0,
62  // G4double radius = -1,
63  // G4int atomsNumber = -1,
64  // G4double lifetime = -1,
65  // G4String aType = "",
66  // G4FakeParticleID ID = G4FakeParticleID::Create()
67  // );
68 
69  G4double mass = 1.0079 * g / Avogadro * c_squared;
70  anInstance = new G4MoleculeDefinition(name, mass, 7e-9 * (m * m / s), 0, // charge
71  1, // number of occupancies
72  0.5 * angstrom); //radius has to be checked
73 
74  ((G4MoleculeDefinition*) anInstance)->SetLevelOccupation(0, 1);
75  ((G4MoleculeDefinition*) anInstance)->SetFormatedName("H");
76  }
77  theInstance = reinterpret_cast<G4Hydrogen*>(anInstance);
78  return theInstance;
79 }
G4ParticleDefinition * FindParticle(G4int PDGEncoding)
const XML_Char * name
Definition: expat.h:151
static G4ParticleTable * GetParticleTable()
static G4Hydrogen * theInstance
Definition: G4Hydrogen.hh:62
static constexpr double g
Definition: G4SIunits.hh:183
static constexpr double m
Definition: G4SIunits.hh:129
const XML_Char * s
Definition: expat.h:262
static constexpr double c_squared
double G4double
Definition: G4Types.hh:76
static constexpr double Avogadro
static G4Hydrogen * Definition()
Definition: G4Hydrogen.cc:46
static constexpr double angstrom
Definition: G4SIunits.hh:102