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25 //
26 // ------------------------------------------------------------
27 // GEANT 4 class header file
28 //
29 // History:
30 // 1st March 2007 creation by L. Desorgher based on a modification of G4Positron
31 // 06 Nov. 2008 modified for Geant4-09-02 by Hisaya Kurashige
32 //
33 //-------------------------------------------------------------
34
35 #include "G4AdjointPositron.hh"
36
37 #include "G4ParticleTable.hh"
38 #include "G4PhysicalConstants.hh"
39 #include "G4String.hh"
40 #include "G4SystemOfUnits.hh"
41 #include "G4Types.hh"
42
43 G4AdjointPositron* G4AdjointPositron::theInstance = nullptr;
44
45 G4AdjointPositron* G4AdjointPositron::Definition()
46 {
47 if (theInstance != nullptr) return theInstance;
48 const G4String name = "adj_e+";
49 // search in particle table]
50 G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
51 G4ParticleDefinition* anInstance = pTable->FindParticle(name);
52 if (anInstance == nullptr) {
53 // create particle
54 //
55 // Arguments for constructor are as follows
56 // name mass width charge
57 // 2*spin parity C-conjugation
58 // 2*Isospin 2*Isospin3 G-parity
59 // type lepton number baryon number PDG encoding
60 // stable lifetime decay table
61 // shortlived subType anti_encoding
62
63 // use constants in CLHEP
64 // static const double electron_mass_c2 = 0.51099906 * MeV;
65
66 // NOTE : electric charge and magnetic moment is opposite
67 // compared with real positron, because adjoint particles
68 // are used to back-trace
69 // clang-format off
70 anInstance = new G4ParticleDefinition(
71 name, electron_mass_c2, 0.0*MeV, -1.*eplus,
72 1, 0, 0,
73 0, 0, 0,
74 "adjoint", -1, 0, -10000011,
75 true, -1.0, nullptr,
76 false, "adj_lepton"
77 );
78 // clang-format on
79 // Bohr Magnetron
80 G4double muB = -0.5*eplus*hbar_Planck/(electron_mass_c2/c_squared) ;
81 anInstance->SetPDGMagneticMoment( muB * 2.* 1.0011596521859 );
82
83 }
84 theInstance = static_cast<G4AdjointPositron*>(anInstance);
85 return theInstance;
86 }
87
88 G4AdjointPositron* G4AdjointPositron::AdjointPositronDefinition()
89 {
90 return Definition();
91 }
92
93 G4AdjointPositron* G4AdjointPositron::AdjointPositron()
94 {
95 return Definition();
96 }
97