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1 // 1 //
2 // ******************************************* 2 // ********************************************************************
3 // * License and Disclaimer 3 // * License and Disclaimer *
4 // * 4 // * *
5 // * The Geant4 software is copyright of th 5 // * The Geant4 software is copyright of the Copyright Holders of *
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17 // * 17 // * *
18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or *
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24 // ******************************************* 24 // ********************************************************************
25 // 25 //
26 // ------------------------------------------- 26 // ----------------------------------------------------------------------
27 // GEANT 4 class implementation file 27 // GEANT 4 class implementation file
28 // 28 //
29 // History: first implementation, based o 29 // History: first implementation, based on object model of
30 // 4th April 1996, G.Cosmo 30 // 4th April 1996, G.Cosmo
31 // ******************************************* 31 // **********************************************************************
32 // New impelemenataion as an utility class M 32 // New impelemenataion as an utility class M.Asai, 26 July 2004
33 // ------------------------------------------- 33 // ----------------------------------------------------------------------
34 34
35 #include "G4SigmaPlus.hh" 35 #include "G4SigmaPlus.hh"
36 36
37 #include "G4DecayTable.hh" 37 #include "G4DecayTable.hh"
38 #include "G4ParticleTable.hh" 38 #include "G4ParticleTable.hh"
39 #include "G4PhaseSpaceDecayChannel.hh" 39 #include "G4PhaseSpaceDecayChannel.hh"
40 #include "G4PhysicalConstants.hh" 40 #include "G4PhysicalConstants.hh"
41 #include "G4String.hh" 41 #include "G4String.hh"
42 #include "G4SystemOfUnits.hh" 42 #include "G4SystemOfUnits.hh"
43 #include "G4Types.hh" 43 #include "G4Types.hh"
44 #include "G4VDecayChannel.hh" 44 #include "G4VDecayChannel.hh"
45 45
46 G4SigmaPlus* G4SigmaPlus::theInstance = nullpt 46 G4SigmaPlus* G4SigmaPlus::theInstance = nullptr;
47 47
48 G4SigmaPlus* G4SigmaPlus::Definition() 48 G4SigmaPlus* G4SigmaPlus::Definition()
49 { 49 {
50 if (theInstance != nullptr) return theInstan 50 if (theInstance != nullptr) return theInstance;
51 const G4String name = "sigma+"; 51 const G4String name = "sigma+";
52 // search in particle table] 52 // search in particle table]
53 G4ParticleTable* pTable = G4ParticleTable::G 53 G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
54 G4ParticleDefinition* anInstance = pTable->F 54 G4ParticleDefinition* anInstance = pTable->FindParticle(name);
55 if (anInstance == nullptr) { 55 if (anInstance == nullptr) {
56 // create particle 56 // create particle
57 // 57 //
58 // Arguments for constructor are as fol 58 // Arguments for constructor are as follows
59 // name mass 59 // name mass width charge
60 // 2*spin parity C- 60 // 2*spin parity C-conjugation
61 // 2*Isospin 2*Isospin3 61 // 2*Isospin 2*Isospin3 G-parity
62 // type lepton number ba 62 // type lepton number baryon number PDG encoding
63 // stable lifetime 63 // stable lifetime decay table
64 // shortlived subType 64 // shortlived subType anti_encoding
65 65
66 // clang-format off 66 // clang-format off
67 anInstance = new G4ParticleDefinition( 67 anInstance = new G4ParticleDefinition(
68 name, 1.18937*GeV, 8.209e- 68 name, 1.18937*GeV, 8.209e-12*MeV, eplus,
69 1, +1, 69 1, +1, 0,
70 2, +2, 70 2, +2, 0,
71 "baryon", 0, 71 "baryon", 0, +1, 3222,
72 false, 0.08018*ns, 72 false, 0.08018*ns, nullptr,
73 false, "sigma"); 73 false, "sigma");
74 // clang-format on 74 // clang-format on
75 75
76 // Magnetic Moment 76 // Magnetic Moment
77 G4double mN = eplus * hbar_Planck / 2. / ( 77 G4double mN = eplus * hbar_Planck / 2. / (proton_mass_c2 / c_squared);
78 anInstance->SetPDGMagneticMoment(2.458 * m 78 anInstance->SetPDGMagneticMoment(2.458 * mN);
79 79
80 // create Decay Table 80 // create Decay Table
81 auto table = new G4DecayTable(); 81 auto table = new G4DecayTable();
82 82
83 // create decay channels 83 // create decay channels
84 auto mode = new G4VDecayChannel*[2]; 84 auto mode = new G4VDecayChannel*[2];
85 // sigma+ -> proton + pi0 85 // sigma+ -> proton + pi0
86 mode[0] = new G4PhaseSpaceDecayChannel("si 86 mode[0] = new G4PhaseSpaceDecayChannel("sigma+", 0.516, 2, "proton", "pi0");
87 // sigma+ -> neutron + pi+ 87 // sigma+ -> neutron + pi+
88 mode[1] = new G4PhaseSpaceDecayChannel("si 88 mode[1] = new G4PhaseSpaceDecayChannel("sigma+", 0.483, 2, "neutron", "pi+");
89 89
90 for (G4int index = 0; index < 2; index++) 90 for (G4int index = 0; index < 2; index++)
91 table->Insert(mode[index]); 91 table->Insert(mode[index]);
92 delete[] mode; 92 delete[] mode;
93 93
94 anInstance->SetDecayTable(table); 94 anInstance->SetDecayTable(table);
95 } 95 }
96 theInstance = static_cast<G4SigmaPlus*>(anIn 96 theInstance = static_cast<G4SigmaPlus*>(anInstance);
97 return theInstance; 97 return theInstance;
98 } 98 }
99 99
100 G4SigmaPlus* G4SigmaPlus::SigmaPlusDefinition( 100 G4SigmaPlus* G4SigmaPlus::SigmaPlusDefinition()
101 { 101 {
102 return Definition(); 102 return Definition();
103 } 103 }
104 104
105 G4SigmaPlus* G4SigmaPlus::SigmaPlus() 105 G4SigmaPlus* G4SigmaPlus::SigmaPlus()
106 { 106 {
107 return Definition(); 107 return Definition();
108 } 108 }
109 109