Geant4  10.01.p03
G4Hydrogen.cc
Go to the documentation of this file.
1 //
2 // ********************************************************************
3 // * License and Disclaimer *
4 // * *
5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. *
10 // * *
11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitation of liability. *
17 // * *
18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Software license. *
24 // ********************************************************************
25 //
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 }
static G4Hydrogen * theInstance
Definition: G4Hydrogen.hh:62
G4ParticleDefinition * FindParticle(G4int PDGEncoding)
G4String name
Definition: TRTMaterials.hh:40
static const double s
Definition: G4SIunits.hh:150
static G4ParticleTable * GetParticleTable()
static const double g
Definition: G4SIunits.hh:162
static const double m
Definition: G4SIunits.hh:110
double G4double
Definition: G4Types.hh:76
static G4Hydrogen * Definition()
Definition: G4Hydrogen.cc:46
static const double angstrom
Definition: G4SIunits.hh:92