| Geant4 Cross Reference |
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 *
6 // * the Geant4 Collaboration. It is provided 6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License 7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/ 8 // * LICENSE and available at http://cern.ch/geant4/license . These *
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 *
22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. *
24 // ******************************************* 24 // ********************************************************************
25 // 25 //
26 // ------------------------------------------- 26 // ----------------------------------------------------------------------
27 // GEANT 4 class implementation file 27 // GEANT 4 class implementation file
28 // 28 //
29 // History: first implementation, based o 29 // History: first implementation, based on object model of
30 // 4th April 1996, G.Cosmo 30 // 4th April 1996, G.Cosmo
31 // H.Kurashige 7 July 31 // H.Kurashige 7 July 1996
32 // ******************************************* 32 // **********************************************************************
33 // New impelemenataion as an utility class M 33 // New impelemenataion as an utility class M.Asai, 26 July 2004
34 // ------------------------------------------- 34 // ----------------------------------------------------------------------
35 35
36 #include "G4AntiNeutron.hh" 36 #include "G4AntiNeutron.hh"
37 37
38 #include "G4DecayTable.hh" 38 #include "G4DecayTable.hh"
39 #include "G4NeutronBetaDecayChannel.hh" 39 #include "G4NeutronBetaDecayChannel.hh"
40 #include "G4ParticleTable.hh" 40 #include "G4ParticleTable.hh"
41 #include "G4PhysicalConstants.hh" 41 #include "G4PhysicalConstants.hh"
42 #include "G4String.hh" 42 #include "G4String.hh"
43 #include "G4SystemOfUnits.hh" 43 #include "G4SystemOfUnits.hh"
44 #include "G4Types.hh" 44 #include "G4Types.hh"
45 #include "G4VDecayChannel.hh" 45 #include "G4VDecayChannel.hh"
46 46
47 G4AntiNeutron* G4AntiNeutron::theInstance = nu 47 G4AntiNeutron* G4AntiNeutron::theInstance = nullptr;
48 48
49 G4AntiNeutron* G4AntiNeutron::Definition() 49 G4AntiNeutron* G4AntiNeutron::Definition()
50 { 50 {
51 if (theInstance != nullptr) return theInstan 51 if (theInstance != nullptr) return theInstance;
52 const G4String name = "anti_neutron"; 52 const G4String name = "anti_neutron";
53 // search in particle table] 53 // search in particle table]
54 G4ParticleTable* pTable = G4ParticleTable::G 54 G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
55 G4ParticleDefinition* anInstance = pTable->F 55 G4ParticleDefinition* anInstance = pTable->FindParticle(name);
56 if (anInstance == nullptr) { 56 if (anInstance == nullptr) {
57 // create particle 57 // create particle
58 // 58 //
59 // Arguments for constructor are as fol 59 // Arguments for constructor are as follows
60 // name mass 60 // name mass width charge
61 // 2*spin parity C- 61 // 2*spin parity C-conjugation
62 // 2*Isospin 2*Isospin3 62 // 2*Isospin 2*Isospin3 G-parity
63 // type lepton number ba 63 // type lepton number baryon number PDG encoding
64 // stable lifetime 64 // stable lifetime decay table
65 // shortlived subType 65 // shortlived subType anti_encoding
66 // use constants in CLHEP 66 // use constants in CLHEP
67 // static const double neutron_mass_c2 = 67 // static const double neutron_mass_c2 = 939.56563 * MeV;
68 // clang-format off 68 // clang-format off
69 anInstance = new G4ParticleDefinition( 69 anInstance = new G4ParticleDefinition(
70 name, neutron_mass_c2, 7.478e 70 name, neutron_mass_c2, 7.478e-28*GeV, 0.0,
71 1, +1, 0, 71 1, +1, 0,
72 1, +1, 0, 72 1, +1, 0,
73 "baryon", 0, - 73 "baryon", 0, -1, -2112,
74 false, 880.2*second, nullptr, 74 false, 880.2*second, nullptr,
75 false, "nucleon", 211 75 false, "nucleon", 2112
76 ); 76 );
77 // clang-format on 77 // clang-format on
78 78
79 // Magnetic Moment 79 // Magnetic Moment
80 G4double mN = eplus * hbar_Planck / 2. / ( 80 G4double mN = eplus * hbar_Planck / 2. / (proton_mass_c2 / c_squared);
81 anInstance->SetPDGMagneticMoment(1.9130427 81 anInstance->SetPDGMagneticMoment(1.9130427 * mN);
82 // create Decay Table 82 // create Decay Table
83 auto table = new G4DecayTable(); 83 auto table = new G4DecayTable();
84 // create a decay channel 84 // create a decay channel
85 G4VDecayChannel* mode = new G4NeutronBetaD 85 G4VDecayChannel* mode = new G4NeutronBetaDecayChannel("anti_neutron", 1.00);
86 table->Insert(mode); 86 table->Insert(mode);
87 anInstance->SetDecayTable(table); 87 anInstance->SetDecayTable(table);
88 } 88 }
89 theInstance = static_cast<G4AntiNeutron*>(an 89 theInstance = static_cast<G4AntiNeutron*>(anInstance);
90 return theInstance; 90 return theInstance;
91 } 91 }
92 92
93 G4AntiNeutron* G4AntiNeutron::AntiNeutronDefin 93 G4AntiNeutron* G4AntiNeutron::AntiNeutronDefinition()
94 { 94 {
95 return Definition(); 95 return Definition();
96 } 96 }
97 97
98 G4AntiNeutron* G4AntiNeutron::AntiNeutron() 98 G4AntiNeutron* G4AntiNeutron::AntiNeutron()
99 { 99 {
100 return Definition(); 100 return Definition();
101 } 101 }
102 102