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