| Geant4 Cross Reference |
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24 // ******************************************* 24 // ********************************************************************
25 // 25 //
26 // Author: 2021 Alberto Ribon 26 // Author: 2021 Alberto Ribon
27 // 27 //
28 //-------------------------------------------- 28 //----------------------------------------------------------------------------
29 29
30 #include "G4HyperAlpha.hh" 30 #include "G4HyperAlpha.hh"
31 31
32 #include "G4DecayTable.hh" 32 #include "G4DecayTable.hh"
33 #include "G4ParticleTable.hh" 33 #include "G4ParticleTable.hh"
34 #include "G4PhaseSpaceDecayChannel.hh" 34 #include "G4PhaseSpaceDecayChannel.hh"
35 #include "G4PhysicalConstants.hh" 35 #include "G4PhysicalConstants.hh"
36 #include "G4String.hh" 36 #include "G4String.hh"
37 #include "G4SystemOfUnits.hh" 37 #include "G4SystemOfUnits.hh"
38 #include "G4Types.hh" 38 #include "G4Types.hh"
39 #include "G4VDecayChannel.hh" 39 #include "G4VDecayChannel.hh"
40 40
41 G4HyperAlpha* G4HyperAlpha::theInstance = null 41 G4HyperAlpha* G4HyperAlpha::theInstance = nullptr;
42 42
43 G4HyperAlpha* G4HyperAlpha::Definition() 43 G4HyperAlpha* G4HyperAlpha::Definition()
44 { 44 {
45 if (theInstance != nullptr) return theInstan 45 if (theInstance != nullptr) return theInstance;
46 const G4String name = "hyperalpha"; 46 const G4String name = "hyperalpha";
47 // search in particle table 47 // search in particle table
48 G4ParticleTable* pTable = G4ParticleTable::G 48 G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
49 auto anInstance = static_cast<G4Ions*>(pTabl 49 auto anInstance = static_cast<G4Ions*>(pTable->FindParticle(name));
50 if (anInstance == nullptr) { 50 if (anInstance == nullptr) {
51 // create particle 51 // create particle
52 // 52 //
53 // Arguments for constructor are as fol 53 // Arguments for constructor are as follows
54 // name 54 // name mass width charge
55 // 2*spin 55 // 2*spin parity C-conjugation
56 // 2*Isospin 2 56 // 2*Isospin 2*Isospin3 G-parity
57 // type lept 57 // type lepton number baryon number PDG encoding
58 // stable 58 // stable lifetime decay table
59 // shortlived 59 // shortlived subType anti_encoding
60 // excitation 60 // excitation
61 61
62 // clang-format off 62 // clang-format off
63 anInstance = new G4Ions( name, 39 63 anInstance = new G4Ions( name, 3921.87*MeV, 2.501e-12*MeV, +2.0*eplus,
64 0, 64 0, +1, 0,
65 0, 65 0, 0, 0,
66 "nucleus", 66 "nucleus", 0, +4, 1010020040,
67 false, 67 false, 0.2631*ns, nullptr,
68 false, "static", 68 false, "static", -1010020040,
69 0.0, 0 69 0.0, 0 );
70 // clang-format on 70 // clang-format on
71 71
72 // Magnetic Moment 72 // Magnetic Moment
73 G4double mN = eplus * hbar_Planck / 2.0 / 73 G4double mN = eplus * hbar_Planck / 2.0 / (proton_mass_c2 / c_squared);
74 anInstance->SetPDGMagneticMoment(2.9789624 74 anInstance->SetPDGMagneticMoment(2.97896248 * mN);
75 75
76 // create Decay Table 76 // create Decay Table
77 auto table = new G4DecayTable; 77 auto table = new G4DecayTable;
78 // create decay channels 78 // create decay channels
79 /* 79 /*
80 // The decay "mode[1]" produces the second 80 // The decay "mode[1]" produces the secondary "Li4" whose corresponding anti-particle
81 // is not existing in Geant4: we therefore 81 // is not existing in Geant4: we therefore skip it for the time being, to keep the
82 // symmetry with the decays of anti_hypera 82 // symmetry with the decays of anti_hyperalpha.
83 const G4double half_br_lambda_to_p_pim = 0 83 const G4double half_br_lambda_to_p_pim = 0.5*0.639;
84 const G4double half_br_lambda_to_n_piz = 0 84 const G4double half_br_lambda_to_n_piz = 0.5*0.358;
85 G4VDecayChannel** mode = new G4VDecayChann 85 G4VDecayChannel** mode = new G4VDecayChannel*[4];
86 // lambda -> proton + pi- , with 50% proba 86 // lambda -> proton + pi- , with 50% probability of capturing the proton
87 mode[0] = new G4PhaseSpaceDecayChannel( "h 87 mode[0] = new G4PhaseSpaceDecayChannel( "hyperalpha", half_br_lambda_to_p_pim, 3,
88 "He3", "proton", "pi-" ); 88 "He3", "proton", "pi-" );
89 mode[1] = new G4PhaseSpaceDecayChannel( "h 89 mode[1] = new G4PhaseSpaceDecayChannel( "hyperalpha", half_br_lambda_to_p_pim, 2,
90 "Li4", "pi-" ); 90 "Li4", "pi-" );
91 // lambda -> neutron + pi0 , with 50% prob 91 // lambda -> neutron + pi0 , with 50% probability of capturing the neutron
92 mode[2] = new G4PhaseSpaceDecayChannel( "h 92 mode[2] = new G4PhaseSpaceDecayChannel( "hyperalpha", half_br_lambda_to_n_piz, 3,
93 "He3", "neutron", "pi0" ); 93 "He3", "neutron", "pi0" );
94 mode[3] = new G4PhaseSpaceDecayChannel( "h 94 mode[3] = new G4PhaseSpaceDecayChannel( "hyperalpha", half_br_lambda_to_n_piz, 2,
95 "alpha", "pi0" ); 95 "alpha", "pi0" );
96 for ( G4int index = 0; index < 4; ++index 96 for ( G4int index = 0; index < 4; ++index ) table->Insert( mode[index] );
97 */ 97 */
98 // Replacement decay for the time being 98 // Replacement decay for the time being
99 const G4double br_lambda_to_p_pim = 0.639; 99 const G4double br_lambda_to_p_pim = 0.639;
100 const G4double half_br_lambda_to_n_piz = 0 100 const G4double half_br_lambda_to_n_piz = 0.5 * 0.358;
101 auto mode = new G4VDecayChannel*[3]; 101 auto mode = new G4VDecayChannel*[3];
102 // lambda -> proton + pi- , with 0% probab 102 // lambda -> proton + pi- , with 0% probability of capturing the proton
103 mode[0] = 103 mode[0] =
104 new G4PhaseSpaceDecayChannel("hyperalpha 104 new G4PhaseSpaceDecayChannel("hyperalpha", br_lambda_to_p_pim, 3, "He3", "proton", "pi-");
105 // lambda -> neutron + pi0 , with 50% prob 105 // lambda -> neutron + pi0 , with 50% probability of capturing the neutron
106 mode[1] = new G4PhaseSpaceDecayChannel("hy 106 mode[1] = new G4PhaseSpaceDecayChannel("hyperalpha", half_br_lambda_to_n_piz, 3, "He3",
107 "ne 107 "neutron", "pi0");
108 mode[2] = 108 mode[2] =
109 new G4PhaseSpaceDecayChannel("hyperalpha 109 new G4PhaseSpaceDecayChannel("hyperalpha", half_br_lambda_to_n_piz, 2, "alpha", "pi0");
110 for (G4int index = 0; index < 3; ++index) 110 for (G4int index = 0; index < 3; ++index)
111 table->Insert(mode[index]); 111 table->Insert(mode[index]);
112 //--- 112 //---
113 delete[] mode; 113 delete[] mode;
114 anInstance->SetDecayTable(table); 114 anInstance->SetDecayTable(table);
115 } 115 }
116 theInstance = static_cast<G4HyperAlpha*>(anI 116 theInstance = static_cast<G4HyperAlpha*>(anInstance);
117 return theInstance; 117 return theInstance;
118 } 118 }
119 119
120 G4HyperAlpha* G4HyperAlpha::HyperAlphaDefiniti 120 G4HyperAlpha* G4HyperAlpha::HyperAlphaDefinition()
121 { 121 {
122 return Definition(); 122 return Definition();
123 } 123 }
124 124
125 G4HyperAlpha* G4HyperAlpha::HyperAlpha() 125 G4HyperAlpha* G4HyperAlpha::HyperAlpha()
126 { 126 {
127 return Definition(); 127 return Definition();
128 } 128 }
129 129