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1 // 1 //
2 // ******************************************* 2 // ********************************************************************
3 // * License and Disclaimer 3 // * License and Disclaimer *
4 // * 4 // * *
5 // * The Geant4 software is copyright of th 5 // * The Geant4 software is copyright of the Copyright Holders of *
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7 // * conditions of the Geant4 Software License 7 // * conditions of the Geant4 Software License, included in the file *
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9 // * include a list of copyright holders. 9 // * include a list of copyright holders. *
10 // * 10 // * *
11 // * Neither the authors of this software syst 11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing fin 12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warran 13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assum 14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file 15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. *
17 // * 17 // * *
18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its *
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24 // ******************************************* 24 // ********************************************************************
25 // 25 //
>> 26 //
>> 27 // $Id: G4Neutron.cc,v 1.24 2010-10-01 02:41:43 kurasige Exp $
>> 28 // GEANT4 tag $Name: geant4-09-04-patch-02 $
>> 29 //
>> 30 //
26 // ------------------------------------------- 31 // ----------------------------------------------------------------------
27 // GEANT 4 class implementation file 32 // GEANT 4 class implementation file
28 // 33 //
29 // History: first implementation, based o 34 // History: first implementation, based on object model of
30 // 4th April 1996, G.Cosmo 35 // 4th April 1996, G.Cosmo
31 // H.Kurashige 7 July 36 // H.Kurashige 7 July 1996
32 // add neutron life time Oct 17 2000 << 37 // add neutron life time Oct 17 2000
33 // ******************************************* 38 // **********************************************************************
34 // New impelemenataion as an utility class M 39 // New impelemenataion as an utility class M.Asai, 26 July 2004
35 // ------------------------------------------- 40 // ----------------------------------------------------------------------
36 41
37 #include "G4Neutron.hh" 42 #include "G4Neutron.hh"
>> 43 #include "G4ParticleTable.hh"
38 44
39 #include "G4DecayTable.hh" <<
40 #include "G4NeutronBetaDecayChannel.hh" 45 #include "G4NeutronBetaDecayChannel.hh"
41 #include "G4ParticleTable.hh" << 46 #include "G4DecayTable.hh"
42 #include "G4PhysicalConstants.hh" <<
43 #include "G4String.hh" <<
44 #include "G4SystemOfUnits.hh" <<
45 #include "G4Types.hh" <<
46 #include "G4VDecayChannel.hh" <<
47 47
48 G4Neutron* G4Neutron::theInstance = nullptr; << 48 // ######################################################################
>> 49 // ### NEUTRON ###
>> 50 // ######################################################################
>> 51 G4Neutron* G4Neutron::theInstance = 0;
49 52
50 G4Neutron* G4Neutron::Definition() 53 G4Neutron* G4Neutron::Definition()
51 { 54 {
52 if (theInstance != nullptr) return theInstan << 55 if (theInstance !=0) return theInstance;
53 const G4String name = "neutron"; 56 const G4String name = "neutron";
54 // search in particle table] 57 // search in particle table]
55 G4ParticleTable* pTable = G4ParticleTable::G 58 G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
56 auto anInstance = static_cast<G4Ions*>(pTabl << 59 G4Ions* anInstance = reinterpret_cast<G4Ions*>(pTable->FindParticle(name));
57 if (anInstance == nullptr) { << 60 if (anInstance ==0)
58 // create particle << 61 {
59 // << 62 // create particle
60 // Arguments for constructor are as fol << 63 //
61 // name mass << 64 // Arguments for constructor are as follows
62 // 2*spin parity C- << 65 // name mass width charge
63 // 2*Isospin 2*Isospin3 << 66 // 2*spin parity C-conjugation
64 // type lepton number ba << 67 // 2*Isospin 2*Isospin3 G-parity
65 // stable lifetime << 68 // type lepton number baryon number PDG encoding
66 // shortlived subType << 69 // stable lifetime decay table
67 // use constants in CLHEP << 70 // shortlived subType anti_encoding
68 // static const double neutron_mass_c2 = << 71 // use constants in CLHEP
>> 72 // static const double neutron_mass_c2 = 939.56563 * MeV;
69 73
70 // clang-format off <<
71 anInstance = new G4Ions( 74 anInstance = new G4Ions(
72 name, neutron_mass_c2, 7.478e << 75 name, neutron_mass_c2, 7.432e-28*GeV, 0.0,
73 1, +1, 0, 76 1, +1, 0,
74 1, -1, 0, 77 1, -1, 0,
75 "baryon", 0, + 78 "baryon", 0, +1, 2112,
76 false, 880.2*second, nullptr, << 79 false, 885.7*second, NULL,
77 false, "nucleon", -2112, << 80 false, "nucleon", 0,
78 0.0, 0 << 81 0.0
79 ); 82 );
80 // clang-format on <<
81 <<
82 // Magnetic Moment 83 // Magnetic Moment
83 G4double mN = eplus * hbar_Planck / 2. / ( << 84 G4double mN = eplus*hbar_Planck/2./(proton_mass_c2 /c_squared);
84 anInstance->SetPDGMagneticMoment(-1.913042 << 85 anInstance->SetPDGMagneticMoment( -1.9130427 * mN);
85 // create Decay Table << 86 //create Decay Table
86 auto table = new G4DecayTable(); << 87 G4DecayTable* table = new G4DecayTable();
87 // create a decay channel 88 // create a decay channel
88 G4VDecayChannel* mode = new G4NeutronBetaD << 89 G4VDecayChannel* mode = new G4NeutronBetaDecayChannel("neutron",1.00);
89 table->Insert(mode); 90 table->Insert(mode);
90 anInstance->SetDecayTable(table); 91 anInstance->SetDecayTable(table);
>> 92
91 } 93 }
92 theInstance = static_cast<G4Neutron*>(anInst << 94 theInstance = reinterpret_cast<G4Neutron*>(anInstance);
93 return theInstance; 95 return theInstance;
94 } 96 }
95 97
96 G4Neutron* G4Neutron::NeutronDefinition() << 98 G4Neutron* G4Neutron::NeutronDefinition()
97 { 99 {
98 return Definition(); 100 return Definition();
99 } 101 }
100 102
101 G4Neutron* G4Neutron::Neutron() << 103 G4Neutron* G4Neutron::Neutron()
102 { 104 {
103 return Definition(); 105 return Definition();
104 } 106 }
>> 107
105 108