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>> 1 // This code implementation is the intellectual property of
>> 2 // the GEANT4 collaboration.
1 // 3 //
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4 // * << 6 // and all its terms.
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6 // * the Geant4 Collaboration. It is provided <<
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8 // * LICENSE and available at http://cern.ch/ <<
9 // * include a list of copyright holders. <<
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11 // * Neither the authors of this software syst <<
12 // * institutes,nor the agencies providing fin <<
13 // * work make any representation or warran <<
14 // * regarding this software system or assum <<
15 // * use. Please see the license in the file <<
16 // * for the full disclaimer and the limitatio <<
17 // * <<
18 // * This code implementation is the result <<
19 // * technical work of the GEANT4 collaboratio <<
20 // * By using, copying, modifying or distri <<
21 // * any work based on the software) you ag <<
22 // * use in resulting scientific publicati <<
23 // * acceptance of all terms of the Geant4 Sof <<
24 // ******************************************* <<
25 // 7 //
>> 8 // $Id: G4Neutron.cc,v 1.2.6.1.2.2 1999/12/14 07:08:02 gunter Exp $
>> 9 // GEANT4 tag $Name: geant4-01-01 $
>> 10 //
>> 11 //
26 // ------------------------------------------- 12 // ----------------------------------------------------------------------
27 // GEANT 4 class implementation file 13 // GEANT 4 class implementation file
28 // 14 //
>> 15 // For information related to this code contact:
>> 16 // CERN, CN Division, ASD Group
29 // History: first implementation, based o 17 // History: first implementation, based on object model of
30 // 4th April 1996, G.Cosmo 18 // 4th April 1996, G.Cosmo
31 // H.Kurashige 7 July 19 // H.Kurashige 7 July 1996
32 // add neutron life time Oct 17 2000 <<
33 // ******************************************* 20 // **********************************************************************
34 // New impelemenataion as an utility class M << 21 #include "g4std/fstream"
35 // ------------------------------------------- << 22 #include "g4std/iomanip"
36 23
37 #include "G4Neutron.hh" 24 #include "G4Neutron.hh"
38 25
39 #include "G4DecayTable.hh" << 26 // ######################################################################
40 #include "G4NeutronBetaDecayChannel.hh" << 27 // ### NEUTRON ###
41 #include "G4ParticleTable.hh" << 28 // ######################################################################
42 #include "G4PhysicalConstants.hh" << 29
43 #include "G4String.hh" << 30 G4Neutron::G4Neutron(
44 #include "G4SystemOfUnits.hh" << 31 const G4String& aName, G4double mass,
45 #include "G4Types.hh" << 32 G4double width, G4double charge,
46 #include "G4VDecayChannel.hh" << 33 G4int iSpin, G4int iParity,
>> 34 G4int iConjugation, G4int iIsospin,
>> 35 G4int iIsospin3, G4int gParity,
>> 36 const G4String& pType, G4int lepton,
>> 37 G4int baryon, G4int encoding,
>> 38 G4bool stable, G4double lifetime,
>> 39 G4DecayTable *decaytable )
>> 40 : G4VBaryon( aName,mass,width,charge,iSpin,iParity,
>> 41 iConjugation,iIsospin,iIsospin3,gParity,pType,
>> 42 lepton,baryon,encoding,stable,lifetime,decaytable )
>> 43 {
>> 44 }
47 45
48 G4Neutron* G4Neutron::theInstance = nullptr; << 46 // ......................................................................
>> 47 // ... static member definitions ...
>> 48 // ......................................................................
>> 49 //
>> 50 // Arguments for constructor are as follows
>> 51 // name mass width charge
>> 52 // 2*spin parity C-conjugation
>> 53 // 2*Isospin 2*Isospin3 G-parity
>> 54 // type lepton number baryon number PDG encoding
>> 55 // stable lifetime decay table
49 56
50 G4Neutron* G4Neutron::Definition() << 57 G4Neutron G4Neutron::theNeutron(
51 { << 58 "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, 59 1, +1, 0,
74 1, -1, 0, 60 1, -1, 0,
75 "baryon", 0, + 61 "baryon", 0, +1, 2112,
76 false, 880.2*second, nullptr, << 62 true, -1.0, NULL
77 false, "nucleon", -2112, << 63 );
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 64
96 G4Neutron* G4Neutron::NeutronDefinition() << 65 G4Neutron* G4Neutron::NeutronDefinition(){return &theNeutron;}
97 { << 66 // initialization for static cut values
98 return Definition(); << 67 G4double G4Neutron::theNeutronLengthCut = -1.0;
99 } << 68 G4double* G4Neutron::theNeutronKineticEnergyCuts = NULL;
100 69
101 G4Neutron* G4Neutron::Neutron() << 70 // **********************************************************************
>> 71 // **************************** SetCuts *********************************
>> 72 // **********************************************************************
>> 73 // In this version Input Cut Value is meaning less
>> 74 // theKineticEnergyCuts for all materials are set to LowestEnergy
>> 75 void G4Neutron::SetCuts(G4double aCut)
102 { 76 {
103 return Definition(); << 77 theCutInMaxInteractionLength = aCut;
>> 78
>> 79 const G4MaterialTable* materialTable = G4Material::GetMaterialTable();
>> 80 // Create the vector of cuts in energy
>> 81 // corresponding to the stopping range cut
>> 82 if(theKineticEnergyCuts) delete [] theKineticEnergyCuts;
>> 83 theKineticEnergyCuts = new G4double [materialTable->length()];
>> 84
>> 85 // Build range vector for every material, convert cut into energy-cut,
>> 86 // fill theKineticEnergyCuts and delete the range vector
>> 87 for (G4int J=0; J<materialTable->length(); J++)
>> 88 {
>> 89 G4Material* aMaterial = (*materialTable)[J];
>> 90 theKineticEnergyCuts[J] = LowestEnergy;
>> 91 }
>> 92 theNeutronLengthCut = theCutInMaxInteractionLength;
>> 93 theNeutronKineticEnergyCuts = theKineticEnergyCuts;
>> 94 // Rebuild the physics tables for every process for this particle type
>> 95
104 } 96 }
>> 97
>> 98
>> 99
>> 100
>> 101
>> 102
>> 103
105 104