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1 // 1 //
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24 // ******************************************* 24 // ********************************************************************
25 // 25 //
>> 26 //
>> 27 // $Id: G4Neutron.cc 69557 2013-05-08 12:01:40Z gcosmo $
>> 28 //
>> 29 //
26 // ------------------------------------------- 30 // ----------------------------------------------------------------------
27 // GEANT 4 class implementation file 31 // GEANT 4 class implementation file
28 // 32 //
29 // History: first implementation, based o 33 // History: first implementation, based on object model of
30 // 4th April 1996, G.Cosmo 34 // 4th April 1996, G.Cosmo
31 // H.Kurashige 7 July 35 // H.Kurashige 7 July 1996
32 // add neutron life time Oct 17 2000 << 36 // add neutron life time Oct 17 2000
33 // ******************************************* 37 // **********************************************************************
34 // New impelemenataion as an utility class M 38 // New impelemenataion as an utility class M.Asai, 26 July 2004
35 // ------------------------------------------- 39 // ----------------------------------------------------------------------
36 40
37 #include "G4Neutron.hh" 41 #include "G4Neutron.hh"
38 <<
39 #include "G4DecayTable.hh" <<
40 #include "G4NeutronBetaDecayChannel.hh" <<
41 #include "G4ParticleTable.hh" <<
42 #include "G4PhysicalConstants.hh" 42 #include "G4PhysicalConstants.hh"
43 #include "G4String.hh" <<
44 #include "G4SystemOfUnits.hh" 43 #include "G4SystemOfUnits.hh"
45 #include "G4Types.hh" << 44 #include "G4ParticleTable.hh"
46 #include "G4VDecayChannel.hh" << 45
>> 46 #include "G4NeutronBetaDecayChannel.hh"
>> 47 #include "G4DecayTable.hh"
47 48
48 G4Neutron* G4Neutron::theInstance = nullptr; << 49 // ######################################################################
>> 50 // ### NEUTRON ###
>> 51 // ######################################################################
>> 52 G4Neutron* G4Neutron::theInstance = 0;
49 53
50 G4Neutron* G4Neutron::Definition() 54 G4Neutron* G4Neutron::Definition()
51 { 55 {
52 if (theInstance != nullptr) return theInstan << 56 if (theInstance !=0) return theInstance;
53 const G4String name = "neutron"; 57 const G4String name = "neutron";
54 // search in particle table] 58 // search in particle table]
55 G4ParticleTable* pTable = G4ParticleTable::G 59 G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
56 auto anInstance = static_cast<G4Ions*>(pTabl << 60 G4Ions* anInstance = reinterpret_cast<G4Ions*>(pTable->FindParticle(name));
57 if (anInstance == nullptr) { << 61 if (anInstance ==0)
58 // create particle << 62 {
59 // << 63 // create particle
60 // Arguments for constructor are as fol << 64 //
61 // name mass << 65 // Arguments for constructor are as follows
62 // 2*spin parity C- << 66 // name mass width charge
63 // 2*Isospin 2*Isospin3 << 67 // 2*spin parity C-conjugation
64 // type lepton number ba << 68 // 2*Isospin 2*Isospin3 G-parity
65 // stable lifetime << 69 // type lepton number baryon number PDG encoding
66 // shortlived subType << 70 // stable lifetime decay table
67 // use constants in CLHEP << 71 // shortlived subType anti_encoding
68 // static const double neutron_mass_c2 = << 72 // use constants in CLHEP
>> 73 // static const double neutron_mass_c2 = 939.56563 * MeV;
69 74
70 // clang-format off <<
71 anInstance = new G4Ions( 75 anInstance = new G4Ions(
72 name, neutron_mass_c2, 7.478e << 76 name, neutron_mass_c2, 7.467e-28*GeV, 0.0,
73 1, +1, 0, 77 1, +1, 0,
74 1, -1, 0, 78 1, -1, 0,
75 "baryon", 0, + 79 "baryon", 0, +1, 2112,
76 false, 880.2*second, nullptr, << 80 false, 885.7*second, NULL,
77 false, "nucleon", -2112, 81 false, "nucleon", -2112,
78 0.0, 0 82 0.0, 0
79 ); 83 );
80 // clang-format on <<
81 <<
82 // Magnetic Moment 84 // Magnetic Moment
83 G4double mN = eplus * hbar_Planck / 2. / ( << 85 G4double mN = eplus*hbar_Planck/2./(proton_mass_c2 /c_squared);
84 anInstance->SetPDGMagneticMoment(-1.913042 << 86 anInstance->SetPDGMagneticMoment( -1.9130427 * mN);
85 // create Decay Table << 87 //create Decay Table
86 auto table = new G4DecayTable(); << 88 G4DecayTable* table = new G4DecayTable();
87 // create a decay channel 89 // create a decay channel
88 G4VDecayChannel* mode = new G4NeutronBetaD << 90 G4VDecayChannel* mode = new G4NeutronBetaDecayChannel("neutron",1.00);
89 table->Insert(mode); 91 table->Insert(mode);
90 anInstance->SetDecayTable(table); 92 anInstance->SetDecayTable(table);
>> 93
91 } 94 }
92 theInstance = static_cast<G4Neutron*>(anInst << 95 theInstance = reinterpret_cast<G4Neutron*>(anInstance);
93 return theInstance; 96 return theInstance;
94 } 97 }
95 98
96 G4Neutron* G4Neutron::NeutronDefinition() << 99 G4Neutron* G4Neutron::NeutronDefinition()
97 { 100 {
98 return Definition(); 101 return Definition();
99 } 102 }
100 103
101 G4Neutron* G4Neutron::Neutron() << 104 G4Neutron* G4Neutron::Neutron()
102 { 105 {
103 return Definition(); 106 return Definition();
104 } 107 }
>> 108
105 109