Geant4  10.01
G4SigmaZero.cc
Go to the documentation of this file.
1 //
2 // ********************************************************************
3 // * License and Disclaimer *
4 // * *
5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. *
10 // * *
11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitation of liability. *
17 // * *
18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Software license. *
24 // ********************************************************************
25 //
26 //
27 // $Id: G4SigmaZero.cc 79357 2014-02-25 10:06:54Z gcosmo $
28 //
29 //
30 // ----------------------------------------------------------------------
31 // GEANT 4 class implementation file
32 //
33 // History: first implementation, based on object model of
34 // 4th April 1996, G.Cosmo
35 // **********************************************************************
36 // New impelemenataion as an utility class M.Asai, 26 July 2004
37 // ----------------------------------------------------------------------
38 
39 #include "G4SigmaZero.hh"
40 #include "G4PhysicalConstants.hh"
41 #include "G4SystemOfUnits.hh"
42 #include "G4ParticleTable.hh"
43 
45 #include "G4DecayTable.hh"
46 
47 // ######################################################################
48 // ### SigmaZero ###
49 // ######################################################################
50 
52 
54 {
55  if (theInstance !=0) return theInstance;
56  const G4String name = "sigma0";
57  // search in particle table]
59  G4ParticleDefinition* anInstance = pTable->FindParticle(name);
60  if (anInstance ==0)
61  {
62  // create particle
63  //
64  // Arguments for constructor are as follows
65  // name mass width charge
66  // 2*spin parity C-conjugation
67  // 2*Isospin 2*Isospin3 G-parity
68  // type lepton number baryon number PDG encoding
69  // stable lifetime decay table
70  // shortlived subType anti_encoding
71 
72  anInstance = new G4ParticleDefinition(
73  name, 1.192642*GeV, 8.9e-3*MeV, 0.0,
74  1, +1, 0,
75  2, 0, 0,
76  "baryon", 0, +1, 3212,
77  false, 7.4e-11*ns, NULL,
78  false, "sigma");
79  // Life time is given from width
80  anInstance->SetPDGLifeTime( hbar_Planck/(anInstance->GetPDGWidth()) );
81 
82  //create Decay Table
83  G4DecayTable* table = new G4DecayTable();
84 
85  // create decay channels
86  // sigma0 -> lambda + gamma
87  G4VDecayChannel* mode = new G4PhaseSpaceDecayChannel("sigma0",1.000,2,"lambda","gamma");
88 
89  table->Insert(mode);
90 
91  anInstance->SetDecayTable(table);
92  }
93  theInstance = reinterpret_cast<G4SigmaZero*>(anInstance);
94  return theInstance;
95 }
96 
98 {
99  return Definition();
100 }
101 
103 {
104  return Definition();
105 }
106 
107 
void SetDecayTable(G4DecayTable *aDecayTable)
static G4SigmaZero * Definition()
Definition: G4SigmaZero.cc:53
static const double MeV
Definition: G4SIunits.hh:193
static G4SigmaZero * SigmaZeroDefinition()
Definition: G4SigmaZero.cc:97
G4ParticleDefinition * FindParticle(G4int PDGEncoding)
G4String name
Definition: TRTMaterials.hh:40
void SetPDGLifeTime(G4double aLifeTime)
static G4SigmaZero * SigmaZero()
Definition: G4SigmaZero.cc:102
G4double GetPDGWidth() const
static const double GeV
Definition: G4SIunits.hh:196
void Insert(G4VDecayChannel *aChannel)
Definition: G4DecayTable.cc:60
static G4ParticleTable * GetParticleTable()
#define ns
Definition: xmlparse.cc:597
static G4SigmaZero * theInstance
Definition: G4SigmaZero.hh:53