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