| Geant4 Cross Reference |
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 *
6 // * the Geant4 Collaboration. It is provided 6 // * the Geant4 Collaboration. It is provided under the terms and *
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 *
22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. *
24 // ******************************************* 24 // ********************************************************************
25 // 25 //
>> 26 // $Id: G4GammaConversion.cc 81865 2014-06-06 11:32:58Z gcosmo $
26 // 27 //
27 // 28 //
28 //------------------ G4GammaConversion physics 29 //------------------ G4GammaConversion physics process -------------------------
29 // by Michel Maire, 24 May 1 30 // by Michel Maire, 24 May 1996
30 // 31 //
31 // Modified by Michel Maire and Vladimir Ivanc << 32 // 11-06-96 Added SelectRandomAtom() method, M.Maire
32 // << 33 // 21-06-96 SetCuts implementation, M.Maire
>> 34 // 24-06-96 simplification in ComputeCrossSectionPerAtom, M.Maire
>> 35 // 24-06-96 in DoIt : change the particleType stuff, M.Maire
>> 36 // 25-06-96 modification in the generation of the teta angle, M.Maire
>> 37 // 16-09-96 minors optimisations in DoIt. Thanks to P.Urban
>> 38 // dynamical array PartialSumSigma
>> 39 // 13-12-96 fast sampling of epsil below 2 MeV, L.Urban
>> 40 // 14-01-97 crossection table + meanfreepath table.
>> 41 // PartialSumSigma removed, M.Maire
>> 42 // 14-01-97 in DoIt the positron is always created, even with Ekine=0,
>> 43 // for further annihilation, M.Maire
>> 44 // 14-03-97 new Physics scheme for geant4alpha, M.Maire
>> 45 // 28-03-97 protection in BuildPhysicsTable, M.Maire
>> 46 // 19-06-97 correction in ComputeCrossSectionPerAtom, L.Urban
>> 47 // 04-06-98 in DoIt, secondary production condition:
>> 48 // range>std::min(threshold,safety)
>> 49 // 13-08-98 new methods SetBining() PrintInfo()
>> 50 // 28-05-01 V.Ivanchenko minor changes to provide ANSI -wall compilation
>> 51 // 11-07-01 PostStepDoIt - sampling epsil: power(rndm,0.333333)
>> 52 // 13-07-01 DoIt: suppression of production cut for the (e-,e+) (mma)
>> 53 // 06-08-01 new methods Store/Retrieve PhysicsTable (mma)
>> 54 // 06-08-01 BuildThePhysicsTable() called from constructor (mma)
>> 55 // 17-09-01 migration of Materials to pure STL (mma)
>> 56 // 20-09-01 DoIt: fminimalEnergy = 1*eV (mma)
>> 57 // 01-10-01 come back to BuildPhysicsTable(const G4ParticleDefinition&)
>> 58 // 11-01-02 ComputeCrossSection: correction of extrapolation below EnergyLimit
>> 59 // 21-03-02 DoIt: correction of the e+e- angular distribution (bug 363) mma
>> 60 // 08-11-04 Remove of Store/Retrieve tables (V.Ivantchenko)
>> 61 // 19-04-05 Migrate to model interface and inherit
>> 62 // from G4VEmProcess (V.Ivanchenko)
>> 63 // 04-05-05, Make class to be default (V.Ivanchenko)
>> 64 // 09-08-06, add SetModel(G4VEmModel*) (mma)
>> 65 // 12-09-06, move SetModel(G4VEmModel*) in G4VEmProcess (mma)
33 // ------------------------------------------- 66 // -----------------------------------------------------------------------------
34 67
35 #include "G4GammaConversion.hh" 68 #include "G4GammaConversion.hh"
36 #include "G4PhysicalConstants.hh" 69 #include "G4PhysicalConstants.hh"
37 #include "G4SystemOfUnits.hh" 70 #include "G4SystemOfUnits.hh"
>> 71 #include "G4BetheHeitlerModel.hh"
38 #include "G4PairProductionRelModel.hh" 72 #include "G4PairProductionRelModel.hh"
39 #include "G4Electron.hh" 73 #include "G4Electron.hh"
40 #include "G4EmParameters.hh" <<
41 74
42 //....oooOO0OOooo........oooOO0OOooo........oo 75 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
43 76
>> 77 using namespace std;
>> 78
44 G4GammaConversion::G4GammaConversion(const G4S 79 G4GammaConversion::G4GammaConversion(const G4String& processName,
45 G4ProcessType type):G4VEmProcess (processNam << 80 G4ProcessType type):G4VEmProcess (processName, type),
>> 81 isInitialised(false)
46 { 82 {
47 SetMinKinEnergy(2.0*CLHEP::electron_mass_c2) << 83 SetMinKinEnergy(2.0*electron_mass_c2);
48 SetProcessSubType(fGammaConversion); 84 SetProcessSubType(fGammaConversion);
49 SetStartFromNullFlag(true); 85 SetStartFromNullFlag(true);
50 SetBuildTableFlag(true); 86 SetBuildTableFlag(true);
51 SetSecondaryParticle(G4Electron::Electron()) 87 SetSecondaryParticle(G4Electron::Electron());
52 SetLambdaBinning(220); << 88 SetLambdaBinning(140);
53 } 89 }
54 90
55 //....oooOO0OOooo........oooOO0OOooo........oo 91 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
56 92
57 G4GammaConversion::~G4GammaConversion() = defa << 93 G4GammaConversion::~G4GammaConversion()
>> 94 {}
58 95
59 //....oooOO0OOooo........oooOO0OOooo........oo 96 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
60 97
61 G4bool G4GammaConversion::IsApplicable(const G 98 G4bool G4GammaConversion::IsApplicable(const G4ParticleDefinition& p)
62 { 99 {
63 return (&p == G4Gamma::Gamma()); 100 return (&p == G4Gamma::Gamma());
64 } 101 }
65 102
66 //....oooOO0OOooo........oooOO0OOooo........oo 103 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
67 104
68 void G4GammaConversion::InitialiseProcess(cons 105 void G4GammaConversion::InitialiseProcess(const G4ParticleDefinition*)
69 { 106 {
70 if(!isInitialised) { 107 if(!isInitialised) {
71 isInitialised = true; 108 isInitialised = true;
72 G4EmParameters* param = G4EmParameters::In << 109 const G4double limit = 80*GeV;
73 G4double emin = std::max(param->MinKinEner << 110 G4double emin = std::max(MinKinEnergy(), 2*electron_mass_c2);
74 G4double emax = param->MaxKinEnergy(); << 111 G4double emax = MaxKinEnergy();
75 <<
76 SetMinKinEnergy(emin); 112 SetMinKinEnergy(emin);
77 113
78 if(nullptr == EmModel(0)) { SetEmModel(new << 114 if(!EmModel(1)) { SetEmModel(new G4BetheHeitlerModel(), 1); }
79 EmModel(0)->SetLowEnergyLimit(emin); << 115 EmModel(1)->SetLowEnergyLimit(emin);
80 EmModel(0)->SetHighEnergyLimit(emax); << 116 G4double ehigh = std::min(emax,limit);
81 AddEmModel(1, EmModel(0)); << 117 ehigh = std::min(ehigh,EmModel(1)->HighEnergyLimit());
>> 118 EmModel(1)->SetHighEnergyLimit(ehigh);
>> 119 AddEmModel(1, EmModel(1));
>> 120
>> 121 if(emax > ehigh) {
>> 122 if(!EmModel(2)) { SetEmModel(new G4PairProductionRelModel(), 2); }
>> 123 EmModel(2)->SetLowEnergyLimit(ehigh);
>> 124 EmModel(2)->SetHighEnergyLimit(emax);
>> 125 AddEmModel(2, EmModel(2));
>> 126 }
82 } 127 }
83 } 128 }
84 129
85 //....oooOO0OOooo........oooOO0OOooo........oo 130 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
86 131
87 G4double G4GammaConversion::MinPrimaryEnergy(c 132 G4double G4GammaConversion::MinPrimaryEnergy(const G4ParticleDefinition*,
88 const G4Material*) 133 const G4Material*)
89 { 134 {
90 return 2*CLHEP::electron_mass_c2; << 135 return 2*electron_mass_c2;
91 } 136 }
92 137
93 //....oooOO0OOooo........oooOO0OOooo........oo 138 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
94 139
95 void G4GammaConversion::ProcessDescription(std << 140 void G4GammaConversion::PrintInfo()
96 { << 141 {}
97 out << " Gamma conversion"; <<
98 G4VEmProcess::ProcessDescription(out); <<
99 } <<
100 142
101 //....oooOO0OOooo........oooOO0OOooo........oo << 143 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
102 144