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1 // 1 //
2 // ******************************************* 2 // ********************************************************************
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4 // * 4 // * *
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15 // * use. Please see the license in the file << 14 // * use. *
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17 // * 15 // * *
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19 // * technical work of the GEANT4 collaboratio << 17 // * GEANT4 collaboration. *
20 // * By using, copying, modifying or distri << 18 // * By copying, distributing or modifying the Program (or any work *
21 // * any work based on the software) you ag << 19 // * based on the Program) you indicate your acceptance of this *
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24 // ******************************************* 21 // ********************************************************************
25 // 22 //
>> 23 //
>> 24 // $Id: G4Neutron.cc,v 1.18 2005/01/14 03:49:11 asaim Exp $
>> 25 // GEANT4 tag $Name: geant4-08-00 $
>> 26 //
>> 27 //
26 // ------------------------------------------- 28 // ----------------------------------------------------------------------
27 // GEANT 4 class implementation file 29 // GEANT 4 class implementation file
28 // 30 //
29 // History: first implementation, based o 31 // History: first implementation, based on object model of
30 // 4th April 1996, G.Cosmo 32 // 4th April 1996, G.Cosmo
31 // H.Kurashige 7 July 33 // H.Kurashige 7 July 1996
32 // add neutron life time Oct 17 2000 << 34 // add neutron life time Oct 17 2000
33 // ******************************************* 35 // **********************************************************************
34 // New impelemenataion as an utility class M 36 // New impelemenataion as an utility class M.Asai, 26 July 2004
35 // ------------------------------------------- 37 // ----------------------------------------------------------------------
36 38
37 #include "G4Neutron.hh" 39 #include "G4Neutron.hh"
>> 40 #include "G4ParticleTable.hh"
38 41
39 #include "G4DecayTable.hh" <<
40 #include "G4NeutronBetaDecayChannel.hh" 42 #include "G4NeutronBetaDecayChannel.hh"
41 #include "G4ParticleTable.hh" << 43 #include "G4DecayTable.hh"
42 #include "G4PhysicalConstants.hh" <<
43 #include "G4String.hh" <<
44 #include "G4SystemOfUnits.hh" <<
45 #include "G4Types.hh" <<
46 #include "G4VDecayChannel.hh" <<
47 44
48 G4Neutron* G4Neutron::theInstance = nullptr; << 45 // ######################################################################
>> 46 // ### NEUTRON ###
>> 47 // ######################################################################
>> 48 G4Neutron* G4Neutron::theInstance = 0;
49 49
50 G4Neutron* G4Neutron::Definition() 50 G4Neutron* G4Neutron::Definition()
51 { 51 {
52 if (theInstance != nullptr) return theInstan << 52 if (theInstance !=0) return theInstance;
53 const G4String name = "neutron"; 53 const G4String name = "neutron";
54 // search in particle table] 54 // search in particle table]
55 G4ParticleTable* pTable = G4ParticleTable::G 55 G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
56 auto anInstance = static_cast<G4Ions*>(pTabl << 56 G4ParticleDefinition* anInstance = pTable->FindParticle(name);
57 if (anInstance == nullptr) { << 57 if (anInstance ==0)
58 // create particle << 58 {
59 // << 59 // create particle
60 // Arguments for constructor are as fol << 60 //
61 // name mass << 61 // Arguments for constructor are as follows
62 // 2*spin parity C- << 62 // name mass width charge
63 // 2*Isospin 2*Isospin3 << 63 // 2*spin parity C-conjugation
64 // type lepton number ba << 64 // 2*Isospin 2*Isospin3 G-parity
65 // stable lifetime << 65 // type lepton number baryon number PDG encoding
66 // shortlived subType << 66 // stable lifetime decay table
67 // use constants in CLHEP << 67 // shortlived subType anti_encoding
68 // static const double neutron_mass_c2 = << 68 anInstance = new G4ParticleDefinition(
69 << 69 name, 0.93956563*GeV, 7.432e-28*GeV, 0.0,
70 // clang-format off <<
71 anInstance = new G4Ions( <<
72 name, neutron_mass_c2, 7.478e <<
73 1, +1, 0, 70 1, +1, 0,
74 1, -1, 0, 71 1, -1, 0,
75 "baryon", 0, + 72 "baryon", 0, +1, 2112,
76 false, 880.2*second, nullptr, << 73 false, 886.7*second, NULL,
77 false, "nucleon", -2112, << 74 false, "neucleon"
78 0.0, 0 <<
79 ); 75 );
80 // clang-format on << 76 //create Decay Table
>> 77 G4DecayTable* table = new G4DecayTable();
>> 78 // create a decay channel
>> 79 G4VDecayChannel* mode = new G4NeutronBetaDecayChannel("neutron",1.00);
>> 80 table->Insert(mode);
>> 81 anInstance->SetDecayTable(table);
81 82
82 // Magnetic Moment << 83 anInstance->SetAtomicNumber(0);
83 G4double mN = eplus * hbar_Planck / 2. / ( << 84 anInstance->SetAtomicMass(1);
84 anInstance->SetPDGMagneticMoment(-1.913042 <<
85 // create Decay Table <<
86 auto table = new G4DecayTable(); <<
87 // create a decay channel <<
88 G4VDecayChannel* mode = new G4NeutronBetaD <<
89 table->Insert(mode); <<
90 anInstance->SetDecayTable(table); <<
91 } 85 }
92 theInstance = static_cast<G4Neutron*>(anInst << 86 theInstance = reinterpret_cast<G4Neutron*>(anInstance);
93 return theInstance; 87 return theInstance;
94 } 88 }
95 89
96 G4Neutron* G4Neutron::NeutronDefinition() << 90 G4Neutron* G4Neutron::NeutronDefinition()
97 { 91 {
98 return Definition(); 92 return Definition();
99 } 93 }
100 94
101 G4Neutron* G4Neutron::Neutron() << 95 G4Neutron* G4Neutron::Neutron()
102 { 96 {
103 return Definition(); 97 return Definition();
104 } 98 }
>> 99
105 100