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1 // 1 //
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24 // ******************************************* 24 // ********************************************************************
25 // 25 //
>> 26 //
>> 27 // $Id: G4PionZero.cc 79357 2014-02-25 10:06:54Z gcosmo $
>> 28 //
>> 29 //
26 // ------------------------------------------- 30 // ----------------------------------------------------------------------
27 // GEANT 4 class implementation file 31 // GEANT 4 class implementation file
28 // 32 //
29 // History: first implementation, based o 33 // History: first implementation, based on object model of
30 // 4th April 1996, G.Cosmo 34 // 4th April 1996, G.Cosmo
31 // ******************************************* 35 // **********************************************************************
32 // New impelemenataion as an utility class M 36 // New impelemenataion as an utility class M.Asai, 26 July 2004
33 // ------------------------------------------- 37 // ----------------------------------------------------------------------
34 38
35 #include "G4PionZero.hh" 39 #include "G4PionZero.hh"
>> 40 #include "G4PhysicalConstants.hh"
>> 41 #include "G4SystemOfUnits.hh"
>> 42 #include "G4ParticleTable.hh"
>> 43
36 44
>> 45 #include "G4PhaseSpaceDecayChannel.hh"
37 #include "G4DalitzDecayChannel.hh" 46 #include "G4DalitzDecayChannel.hh"
38 #include "G4DecayTable.hh" 47 #include "G4DecayTable.hh"
39 #include "G4ParticleTable.hh" <<
40 #include "G4PhaseSpaceDecayChannel.hh" <<
41 #include "G4PhysicalConstants.hh" <<
42 #include "G4String.hh" <<
43 #include "G4SystemOfUnits.hh" <<
44 #include "G4VDecayChannel.hh" <<
45 48
46 G4PionZero* G4PionZero::theInstance = nullptr; << 49 // ######################################################################
>> 50 // ### PIONZERO ###
>> 51 // ######################################################################
>> 52
>> 53 G4PionZero* G4PionZero::theInstance = 0;
47 54
48 G4PionZero* G4PionZero::Definition() 55 G4PionZero* G4PionZero::Definition()
49 { 56 {
50 if (theInstance != nullptr) return theInstan << 57 if (theInstance !=0) return theInstance;
51 const G4String name = "pi0"; 58 const G4String name = "pi0";
52 // search in particle table] 59 // search in particle table]
53 G4ParticleTable* pTable = G4ParticleTable::G 60 G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
54 G4ParticleDefinition* anInstance = pTable->F 61 G4ParticleDefinition* anInstance = pTable->FindParticle(name);
55 if (anInstance == nullptr) { << 62 if (anInstance ==0)
56 // create particle << 63 {
57 // << 64 // create particle
58 // Arguments for constructor are as fol << 65 //
59 // name mass << 66 // Arguments for constructor are as follows
60 // 2*spin parity C- << 67 // name mass width charge
61 // 2*Isospin 2*Isospin3 << 68 // 2*spin parity C-conjugation
62 // type lepton number ba << 69 // 2*Isospin 2*Isospin3 G-parity
63 // stable lifetime << 70 // type lepton number baryon number PDG encoding
64 // shortlived subType << 71 // stable lifetime decay table
>> 72 // shortlived subType anti_encoding
65 73
66 // clang-format off <<
67 anInstance = new G4ParticleDefinition( 74 anInstance = new G4ParticleDefinition(
68 name, 0.1349766*GeV, 7.73e 75 name, 0.1349766*GeV, 7.73e-06*MeV, 0.0,
69 0, -1, 76 0, -1, +1,
70 2, 0, 77 2, 0, -1,
71 "meson", 0, 78 "meson", 0, 0, 111,
72 false, 8.52e-8*ns, << 79 false, 8.52e-8*ns, NULL,
73 false, "pi", 80 false, "pi", 111);
74 // clang-format on <<
75 81
76 // Life time is given from width << 82 // Life time is given from width
77 anInstance->SetPDGLifeTime(hbar_Planck / ( << 83 anInstance->SetPDGLifeTime( hbar_Planck/(anInstance->GetPDGWidth()) );
>> 84
>> 85 //create Decay Table
>> 86 G4DecayTable* table = new G4DecayTable();
>> 87
>> 88 // create a decay channel
>> 89 G4VDecayChannel* mode;
>> 90 // pi0 -> gamma + gamma
>> 91 mode = new G4PhaseSpaceDecayChannel("pi0",0.988,2,"gamma","gamma");
>> 92 table->Insert(mode);
>> 93 // pi0 -> gamma + e+ + e-
>> 94 mode = new G4DalitzDecayChannel("pi0",0.012,"e-","e+");
>> 95 table->Insert(mode);
78 96
79 // create Decay Table << 97 anInstance->SetDecayTable(table);
80 auto table = new G4DecayTable(); <<
81 <<
82 // create a decay channel <<
83 G4VDecayChannel* mode; <<
84 // pi0 -> gamma + gamma <<
85 mode = new G4PhaseSpaceDecayChannel("pi0", <<
86 table->Insert(mode); <<
87 // pi0 -> gamma + e+ + e- <<
88 mode = new G4DalitzDecayChannel("pi0", 0.0 <<
89 table->Insert(mode); <<
90 <<
91 anInstance->SetDecayTable(table); <<
92 } 98 }
93 theInstance = static_cast<G4PionZero*>(anIns << 99 theInstance = reinterpret_cast<G4PionZero*>(anInstance);
94 return theInstance; 100 return theInstance;
95 } 101 }
96 102
97 G4PionZero* G4PionZero::PionZeroDefinition() << 103 G4PionZero* G4PionZero::PionZeroDefinition()
98 { 104 {
99 return Definition(); 105 return Definition();
100 } 106 }
101 107
102 G4PionZero* G4PionZero::PionZero() << 108 G4PionZero* G4PionZero::PionZero()
103 { 109 {
104 return Definition(); 110 return Definition();
105 } 111 }
>> 112
106 113