source: trunk/source/processes/electromagnetic/lowenergy/src/G4FinalStateChargeIncrease.cc@ 968

Last change on this file since 968 was 961, checked in by garnier, 17 years ago

update processes
  • Property svn:executable set to *
File size: 5.8 KB
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1//
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5// * The Geant4 software is copyright of the Copyright Holders of *
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14// * regarding this software system or assume any liability for its *
15// * use. Please see the license in the file LICENSE and URL above *
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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 *
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24// ********************************************************************
25//
26// $Id: G4FinalStateChargeIncrease.cc,v 1.4 2009/01/20 07:50:28 sincerti Exp $
27// GEANT4 tag $Name: geant4-09-02-ref-02 $
28
29#include "G4FinalStateChargeIncrease.hh"
30
31//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
32
33G4FinalStateChargeIncrease::G4FinalStateChargeIncrease()
34{
35 lowEnergyLimit = 1 * keV;
36 highEnergyLimit = 10 * MeV;
37}
38
39//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
40
41G4FinalStateChargeIncrease::~G4FinalStateChargeIncrease()
42{}
43
44//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
45
46const G4FinalStateProduct& G4FinalStateChargeIncrease::GenerateFinalState(const G4Track& track, const G4Step& /* step */)
47{
48 product.Clear();
49
50 //SI - Added protection against total energy deposit
51 product.DoNotDepositEnergy();
52 //
53 product.KillPrimaryParticle();
54 product.AddEnergyDeposit(0.);
55
56 G4ParticleDefinition* definition = track.GetDefinition();
57
58 G4double inK = track.GetDynamicParticle()->GetKineticEnergy();
59
60 G4int finalStateIndex = cross.RandomSelect(inK,definition);
61
62 G4int n = NumberOfFinalStates(track.GetDefinition(),finalStateIndex);
63 G4double outK = inK - IncomingParticleBindingEnergyConstant(definition,finalStateIndex);
64
65 G4DNAGenericIonsManager* instance;
66 instance = G4DNAGenericIonsManager::Instance();
67
68 G4double electronK;
69 if (definition == instance->GetIon("hydrogen")) electronK = inK*electron_mass_c2/proton_mass_c2;
70 else electronK = inK*electron_mass_c2/(3728*MeV);
71
72 if (outK<0)
73 {
74 G4String message;
75 message="G4FinalStateChargeIncrease - Final kinetic energy is below 0! Process ";
76 }
77
78 product.AddSecondary(new G4DynamicParticle(OutgoingParticleDefinition(definition,finalStateIndex),
79 track.GetDynamicParticle()->GetMomentumDirection(),
80 outK));
81
82 n = n - 1;
83
84 while (n>0)
85 {
86 n--;
87 product.AddSecondary
88 (new G4DynamicParticle(G4Electron::Electron(), track.GetDynamicParticle()->GetMomentumDirection(), electronK));
89 }
90
91 return product;
92}
93
94//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
95
96G4int G4FinalStateChargeIncrease::NumberOfFinalStates(G4ParticleDefinition* particleDefinition,
97 G4int finalStateIndex )
98
99{
100 G4DNAGenericIonsManager* instance;
101 instance = G4DNAGenericIonsManager::Instance();
102 if (particleDefinition == instance->GetIon("hydrogen")) return 2;
103 if (particleDefinition == instance->GetIon("alpha+")) return 2;
104
105 if (particleDefinition == instance->GetIon("helium"))
106 { if (finalStateIndex==0) return 2;
107 return 3;
108 }
109 return 0;
110}
111
112//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
113
114G4ParticleDefinition* G4FinalStateChargeIncrease::OutgoingParticleDefinition (G4ParticleDefinition* particleDefinition,
115 G4int finalStateIndex)
116{
117 G4DNAGenericIonsManager * instance(G4DNAGenericIonsManager::Instance());
118 if (particleDefinition == instance->GetIon("hydrogen")) return G4Proton::Proton();
119 if (particleDefinition == instance->GetIon("alpha+")) return instance->GetIon("alpha++");
120
121 if (particleDefinition == instance->GetIon("alpha+")) return instance->GetIon("helium");
122 {
123 if (finalStateIndex==0) return instance->GetIon("alpha+");
124 return instance->GetIon("alpha++");
125 }
126 return 0;
127}
128
129//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
130
131G4double G4FinalStateChargeIncrease::IncomingParticleBindingEnergyConstant(G4ParticleDefinition* particleDefinition,
132 G4int finalStateIndex )
133{
134 G4DNAGenericIonsManager * instance(G4DNAGenericIonsManager::Instance());
135 if(particleDefinition == instance->GetIon("hydrogen")) return 13.6*eV;
136
137 if(particleDefinition == instance->GetIon("alpha+"))
138 {
139 // Binding energy for He+ -> He++ + e- 54.509 eV
140 // Binding energy for He -> He+ + e- 24.587 eV
141 return 54.509*eV;
142 }
143
144 if(particleDefinition == instance->GetIon("helium"))
145 {
146 // Binding energy for He+ -> He++ + e- 54.509 eV
147 // Binding energy for He -> He+ + e- 24.587 eV
148
149 if (finalStateIndex==0) return 24.587*eV;
150 return (54.509 + 24.587)*eV;
151 }
152
153 return 0;
154}
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