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G4Positron.cc
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26 //
27 //
28 //
29 // ----------------------------------------------------------------------
30 // GEANT 4 class implementation file
31 //
32 // History: first implementation, based on object model of
33 // 4th April 1996, G.Cosmo
34 // **********************************************************************
35 // New impelemenataion as an utility class M.Asai, 26 July 2004
36 // ----------------------------------------------------------------------
37 
38 #include "G4Positron.hh"
39 #include "G4PhysicalConstants.hh"
40 #include "G4SystemOfUnits.hh"
41 #include "G4ParticleTable.hh"
42 
43 // ######################################################################
44 // ### POSITRON ###
45 // ######################################################################
47 
49 {
50  if (theInstance !=0) return theInstance;
51  const G4String name = "e+";
52  // search in particle table]
54  G4ParticleDefinition* anInstance = pTable->FindParticle(name);
55  if (anInstance ==0)
56  {
57  // create particle
58  //
59  // Arguments for constructor are as follows
60  // name mass width charge
61  // 2*spin parity C-conjugation
62  // 2*Isospin 2*Isospin3 G-parity
63  // type lepton number baryon number PDG encoding
64  // stable lifetime decay table
65  // shortlived subType anti_encoding
66  // use constants in CLHEP
67  // static const double electron_mass_c2 = 0.51099906 * MeV;
68 
69  anInstance = new G4ParticleDefinition(
70  name, electron_mass_c2, 0.0*MeV, +1.*eplus,
71  1, 0, 0,
72  0, 0, 0,
73  "lepton", -1, 0, -11,
74  true, -1.0, NULL,
75  false, "e"
76  );
77 
78  // Bohr Magnetron
80 
81  anInstance->SetPDGMagneticMoment( muB * 1.00115965218076 );
82 
83  }
84  theInstance = reinterpret_cast<G4Positron*>(anInstance);
85  return theInstance;
86 }
87 
89 {
90  return Definition();
91 }
92 
94 {
95  return Definition();
96 }
97 
98