Geant4  10.01
G4Lambda.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: G4Lambda.cc 67971 2013-03-13 10:13:24Z 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 "G4Lambda.hh"
40 #include "G4PhysicalConstants.hh"
41 #include "G4SystemOfUnits.hh"
42 #include "G4ParticleTable.hh"
43 
45 #include "G4DecayTable.hh"
46 
47 // ######################################################################
48 // ### Lambda ###
49 // ######################################################################
50 
52 
54 {
55  if (theInstance !=0) return theInstance;
56  const G4String name = "lambda";
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, 1.115683*GeV, 2.501e-12*MeV, 0.0,
74  1, +1, 0,
75  0, 0, 0,
76  "baryon", 0, +1, 3122,
77  false, 0.2631*ns, NULL,
78  false, "lambda");
79 
80  // Magnetic Moment
81  G4double mN = eplus*hbar_Planck/2./(proton_mass_c2 /c_squared);
82  anInstance->SetPDGMagneticMoment( -0.613 * mN);
83 
84  //create Decay Table
85  G4DecayTable* table = new G4DecayTable();
86 
87  // create decay channels
88  G4VDecayChannel** mode = new G4VDecayChannel*[2];
89  // lambda -> proton + pi-
90  mode[0] = new G4PhaseSpaceDecayChannel("lambda",0.639,2,"proton","pi-");
91  // lambda -> neutron + pi0
92  mode[1] = new G4PhaseSpaceDecayChannel("lambda",0.358,2,"neutron","pi0");
93 
94  for (G4int index=0; index <2; index++ ) table->Insert(mode[index]);
95  delete [] mode;
96 
97  anInstance->SetDecayTable(table);
98  }
99  theInstance = reinterpret_cast<G4Lambda*>(anInstance);
100  return theInstance;
101 }
102 
104 {
105  return Definition();
106 }
107 
109 {
110  return Definition();
111 }
112 
113 
void SetDecayTable(G4DecayTable *aDecayTable)
static const double MeV
Definition: G4SIunits.hh:193
G4ParticleDefinition * FindParticle(G4int PDGEncoding)
G4String name
Definition: TRTMaterials.hh:40
int G4int
Definition: G4Types.hh:78
static G4Lambda * theInstance
Definition: G4Lambda.hh:53
static G4Lambda * Definition()
Definition: G4Lambda.cc:53
static const double GeV
Definition: G4SIunits.hh:196
void Insert(G4VDecayChannel *aChannel)
Definition: G4DecayTable.cc:60
static G4ParticleTable * GetParticleTable()
static G4Lambda * LambdaDefinition()
Definition: G4Lambda.cc:103
static G4Lambda * Lambda()
Definition: G4Lambda.cc:108
double G4double
Definition: G4Types.hh:76
static const double eplus
Definition: G4SIunits.hh:178
#define ns
Definition: xmlparse.cc:597
void SetPDGMagneticMoment(G4double mageticMoment)