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1 //
2 // ********************************************************************
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18 // * This code implementation is the result of the scientific and *
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24 // ********************************************************************
25 //
26 // ----------------------------------------------------------------------
27 // GEANT 4 class implementation file
28 //
29 // History: first implementation, based on object model of
30 // 4th April 1996, G.Cosmo
31 // **********************************************************************
32 // New impelemenataion as an utility class M.Asai, 26 July 2004
33 // ----------------------------------------------------------------------
34
35 #include "G4Proton.hh"
36
37 #include "G4ParticleTable.hh"
38 #include "G4PhysicalConstants.hh"
39 #include "G4String.hh"
40 #include "G4SystemOfUnits.hh"
41 #include "G4Types.hh"
42
43 G4Proton* G4Proton::theInstance = nullptr;
44
45 G4Proton* G4Proton::Definition()
46 {
47 if (theInstance != nullptr) return theInstance;
48 const G4String name = "proton";
49 // search in particle table]
50 G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
51 auto anInstance = static_cast<G4Ions*>(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 // use constants in CLHEP
63 // static const double proton_mass_c2 = 938.27231 * MeV;
64
65 // clang-format off
66 anInstance = new G4Ions(
67 name, proton_mass_c2, 0.0*MeV, eplus,
68 1, +1, 0,
69 1, +1, 0,
70 "baryon", 0, +1, 2212,
71 true, -1.0, nullptr,
72 false, "nucleon", -2212,
73 0.0, 0
74 );
75 // clang-format on
76
77 // Magnetic Moment
78 G4double mN = eplus * hbar_Planck / 2. / (proton_mass_c2 / c_squared);
79 anInstance->SetPDGMagneticMoment(2.792847351 * mN);
80 }
81 theInstance = static_cast<G4Proton*>(anInstance);
82 return theInstance;
83 }
84
85 G4Proton* G4Proton::ProtonDefinition()
86 {
87 return Definition();
88 }
89
90 G4Proton* G4Proton::Proton()
91 {
92 return Definition();
93 }
94