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1 // 1 //
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24 // ******************************************* 21 // ********************************************************************
25 // 22 //
>> 23 //
>> 24 // $Id: G4Neutron.cc,v 1.6.2.1 2001/06/28 19:10:45 gunter Exp $
>> 25 // GEANT4 tag $Name: $
>> 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 #include "g4std/fstream"
35 // ------------------------------------------- << 37 #include "g4std/iomanip"
36 38
37 #include "G4Neutron.hh" 39 #include "G4Neutron.hh"
38 40
39 #include "G4DecayTable.hh" << 41 // ######################################################################
40 #include "G4NeutronBetaDecayChannel.hh" << 42 // ### NEUTRON ###
41 #include "G4ParticleTable.hh" << 43 // ######################################################################
42 #include "G4PhysicalConstants.hh" << 44
43 #include "G4String.hh" << 45 G4Neutron::G4Neutron(
44 #include "G4SystemOfUnits.hh" << 46 const G4String& aName, G4double mass,
45 #include "G4Types.hh" << 47 G4double width, G4double charge,
46 #include "G4VDecayChannel.hh" << 48 G4int iSpin, G4int iParity,
>> 49 G4int iConjugation, G4int iIsospin,
>> 50 G4int iIsospin3, G4int gParity,
>> 51 const G4String& pType, G4int lepton,
>> 52 G4int baryon, G4int encoding,
>> 53 G4bool stable, G4double lifetime,
>> 54 G4DecayTable *decaytable )
>> 55 : G4VBaryon( aName,mass,width,charge,iSpin,iParity,
>> 56 iConjugation,iIsospin,iIsospin3,gParity,pType,
>> 57 lepton,baryon,encoding,stable,lifetime,decaytable )
>> 58 {
>> 59 SetParticleSubType("nucleon");
>> 60 }
47 61
48 G4Neutron* G4Neutron::theInstance = nullptr; << 62 // ......................................................................
>> 63 // ... static member definitions ...
>> 64 // ......................................................................
>> 65 //
>> 66 // Arguments for constructor are as follows
>> 67 // name mass width charge
>> 68 // 2*spin parity C-conjugation
>> 69 // 2*Isospin 2*Isospin3 G-parity
>> 70 // type lepton number baryon number PDG encoding
>> 71 // stable lifetime decay table
49 72
50 G4Neutron* G4Neutron::Definition() << 73 G4Neutron G4Neutron::theNeutron(
51 { << 74 "neutron", 0.93956563*GeV, 0.0*MeV, 0.0,
52 if (theInstance != nullptr) return theInstan <<
53 const G4String name = "neutron"; <<
54 // search in particle table] <<
55 G4ParticleTable* pTable = G4ParticleTable::G <<
56 auto anInstance = static_cast<G4Ions*>(pTabl <<
57 if (anInstance == nullptr) { <<
58 // create particle <<
59 // <<
60 // Arguments for constructor are as fol <<
61 // name mass <<
62 // 2*spin parity C- <<
63 // 2*Isospin 2*Isospin3 <<
64 // type lepton number ba <<
65 // stable lifetime <<
66 // shortlived subType <<
67 // use constants in CLHEP <<
68 // static const double neutron_mass_c2 = <<
69 <<
70 // clang-format off <<
71 anInstance = new G4Ions( <<
72 name, neutron_mass_c2, 7.478e <<
73 1, +1, 0, 75 1, +1, 0,
74 1, -1, 0, 76 1, -1, 0,
75 "baryon", 0, + 77 "baryon", 0, +1, 2112,
76 false, 880.2*second, nullptr, << 78 true, 886.7*second, NULL
77 false, "nucleon", -2112, << 79 );
78 0.0, 0 <<
79 ); <<
80 // clang-format on <<
81 <<
82 // Magnetic Moment <<
83 G4double mN = eplus * hbar_Planck / 2. / ( <<
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 } <<
92 theInstance = static_cast<G4Neutron*>(anInst <<
93 return theInstance; <<
94 } <<
95 80
96 G4Neutron* G4Neutron::NeutronDefinition() << 81 G4Neutron* G4Neutron::NeutronDefinition(){return &theNeutron;}
97 { << 82 // initialization for static cut values
98 return Definition(); << 83 G4double G4Neutron::theNeutronLengthCut = -1.0;
99 } << 84 G4double* G4Neutron::theNeutronKineticEnergyCuts = NULL;
100 85
101 G4Neutron* G4Neutron::Neutron() << 86 // **********************************************************************
>> 87 // **************************** SetCuts *********************************
>> 88 // **********************************************************************
>> 89 // In this version Input Cut Value is meaning less
>> 90 // theKineticEnergyCuts for all materials are set to LowestEnergy
>> 91 void G4Neutron::SetCuts(G4double aCut)
102 { 92 {
103 return Definition(); << 93 theCutInMaxInteractionLength = aCut;
>> 94
>> 95 const G4MaterialTable* materialTable = G4Material::GetMaterialTable();
>> 96 // Create the vector of cuts in energy
>> 97 // corresponding to the stopping range cut
>> 98 if(theKineticEnergyCuts) delete [] theKineticEnergyCuts;
>> 99 theKineticEnergyCuts = new G4double [materialTable->length()];
>> 100
>> 101 // Build range vector for every material, convert cut into energy-cut,
>> 102 // fill theKineticEnergyCuts and delete the range vector
>> 103 for (size_t J=0; J<materialTable->length(); J++)
>> 104 {
>> 105 theKineticEnergyCuts[J] = LowestEnergy;
>> 106 }
>> 107 theNeutronLengthCut = theCutInMaxInteractionLength;
>> 108 theNeutronKineticEnergyCuts = theKineticEnergyCuts;
>> 109 // Rebuild the physics tables for every process for this particle type
>> 110
104 } 111 }
>> 112
>> 113
>> 114
>> 115
>> 116
>> 117
>> 118
105 119