Geant4 11.1.1
Toolkit for the simulation of the passage of particles through matter
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G4DoubleHyperDoubleNeutron.cc
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25//
26// Author: 2021 Alberto Ribon
27//
28//----------------------------------------------------------------------------
29
32#include "G4SystemOfUnits.hh"
33#include "G4ParticleTable.hh"
34
36#include "G4DecayTable.hh"
37
38// ######################################################################
39// ### DOUBLEHYPERDOUBLENEUTRON ###
40// ######################################################################
41
42G4DoubleHyperDoubleNeutron* G4DoubleHyperDoubleNeutron::theInstance = nullptr;
43
44
46 if ( theInstance != nullptr ) return theInstance;
47 const G4String name = "doublehyperdoubleneutron";
48 // search in particle table
50 G4Ions* anInstance = static_cast< G4Ions* >( pTable->FindParticle( name ) );
51 if ( anInstance == nullptr ) {
52 // create particle
53 //
54 // Arguments for constructor are as follows
55 // name mass width charge
56 // 2*spin parity C-conjugation
57 // 2*Isospin 2*Isospin3 G-parity
58 // type lepton number baryon number PDG encoding
59 // stable lifetime decay table
60 // shortlived subType anti_encoding
61 // excitation
62 anInstance = new G4Ions( name, 4110.24*MeV, 2.501e-12*MeV, 0.0*eplus,
63 0, +1, 0,
64 0, 0, 0,
65 "nucleus", 0, +4, 1020000040,
66 false, 0.2631*ns, nullptr,
67 false, "static", -1020000040,
68 0.0, 0 );
69 // Magnetic Moment
70 G4double mN = eplus*hbar_Planck/2.0/(proton_mass_c2 /c_squared);
71 anInstance->SetPDGMagneticMoment( 2.97896248 * mN );
72
73 // create Decay Table
74 G4DecayTable* table = new G4DecayTable;
75 // create decay channels
76 const G4double half_br_lambda_to_p_pim = 0.5*0.639;
77 const G4double br_lambda_to_n_piz = 0.358;
78 G4VDecayChannel** mode = new G4VDecayChannel*[3];
79 // lambda -> proton + pi- , with 50% probability of capturing the proton
80 mode[0] = new G4PhaseSpaceDecayChannel( "doublehyperdoubleneutron", half_br_lambda_to_p_pim, 5,
81 "neutron", "neutron", "lambda", "proton", "pi-" );
82 mode[1] = new G4PhaseSpaceDecayChannel( "doublehyperdoubleneutron", half_br_lambda_to_p_pim, 2,
83 "hyperH4", "pi-" );
84 // lambda -> neutron + pi0 , without any possibility of capturing the neutron
85 mode[2] = new G4PhaseSpaceDecayChannel( "doublehyperdoubleneutron", br_lambda_to_n_piz, 5,
86 "neutron", "neutron", "lambda", "neutron", "pi0" );
87 for ( G4int index = 0; index < 3; ++index ) table->Insert( mode[index] );
88 delete [] mode;
89 anInstance->SetDecayTable( table );
90 }
91 theInstance = static_cast< G4DoubleHyperDoubleNeutron* >( anInstance );
92 return theInstance;
93}
94
95
97 return Definition();
98}
99
100
102 return Definition();
103}
double G4double
Definition: G4Types.hh:83
int G4int
Definition: G4Types.hh:85
void Insert(G4VDecayChannel *aChannel)
Definition: G4DecayTable.cc:53
static G4DoubleHyperDoubleNeutron * DoubleHyperDoubleNeutronDefinition()
static G4DoubleHyperDoubleNeutron * DoubleHyperDoubleNeutron()
static G4DoubleHyperDoubleNeutron * Definition()
Definition: G4Ions.hh:52
G4Ions()
Definition: G4Ions.cc:102
void SetPDGMagneticMoment(G4double mageticMoment)
void SetDecayTable(G4DecayTable *aDecayTable)
G4ParticleDefinition * FindParticle(G4int PDGEncoding)
static G4ParticleTable * GetParticleTable()
#define ns(x)
Definition: xmltok.c:1649