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29 // Med. Phys. 37 (2010) 4692-4708
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32 //---------------------------------------------------------------------------
33 //
34 // ClassName: G4ElectronCapture
35 //
36 // Description: The process to kill particles to save CPU
37 //
38 // Author: V.Ivanchenko 31 August 2010
39 //
40 //----------------------------------------------------------------------------
41 //
42 /// \file G4ElectronCapture.cc
43 /// \brief Implementation of the G4ElectronCapture class
44
45 #include "G4ElectronCapture.hh"
46
47 #include "G4Electron.hh"
48 #include "G4ParticleDefinition.hh"
49 #include "G4Region.hh"
50 #include "G4RegionStore.hh"
51 #include "G4Step.hh"
52 #include "G4SystemOfUnits.hh"
53 #include "G4Track.hh"
54
55 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
56
57 G4ElectronCapture::G4ElectronCapture(const G4String& regName, G4double ekinlim)
58 : G4VDiscreteProcess("eCapture", fElectromagnetic),
59 fKinEnergyThreshold(ekinlim),
60 fRegionName(regName),
61 fpRegion(0)
62 {
63 if (regName == "" || regName == "world") {
64 fRegionName = "DefaultRegionForTheWorld";
65 }
66 pParticleChange = &fParticleChange;
67 }
68
69 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
70
71 G4ElectronCapture::~G4ElectronCapture() {}
72
73 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
74
75 void G4ElectronCapture::SetKinEnergyLimit(G4double val)
76 {
77 fKinEnergyThreshold = val;
78 if (verboseLevel > 0) {
79 G4cout << "### G4ElectronCapture: Tracking cut E(MeV) = " << fKinEnergyThreshold / MeV
80 << G4endl;
81 }
82 }
83
84 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
85
86 void G4ElectronCapture::BuildPhysicsTable(const G4ParticleDefinition&)
87 {
88 fpRegion = (G4RegionStore::GetInstance())->GetRegion(fRegionName);
89 if (fpRegion && verboseLevel > 0) {
90 G4cout << "### G4ElectronCapture: Tracking cut E(MeV) = " << fKinEnergyThreshold / MeV
91 << " is assigned to " << fRegionName << G4endl;
92 }
93 }
94
95 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
96
97 G4bool G4ElectronCapture::IsApplicable(const G4ParticleDefinition&)
98 {
99 return true;
100 }
101
102 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
103
104 G4double G4ElectronCapture::PostStepGetPhysicalInteractionLength(const G4Track& aTrack, G4double,
105 G4ForceCondition* condition)
106 {
107 // condition is set to "Not Forced"
108 *condition = NotForced;
109
110 G4double limit = DBL_MAX;
111 if (fpRegion) {
112 if (aTrack.GetVolume()->GetLogicalVolume()->GetRegion() == fpRegion
113 && aTrack.GetKineticEnergy() < fKinEnergyThreshold)
114 {
115 limit = 0.0;
116 }
117 }
118 return limit;
119 }
120
121 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
122
123 G4VParticleChange* G4ElectronCapture::PostStepDoIt(const G4Track& aTrack, const G4Step&)
124 {
125 pParticleChange->Initialize(aTrack);
126 pParticleChange->ProposeTrackStatus(fStopAndKill);
127 pParticleChange->ProposeLocalEnergyDeposit(aTrack.GetKineticEnergy());
128 fParticleChange.SetProposedKineticEnergy(0.0);
129 return pParticleChange;
130 }
131
132 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
133
134 G4double G4ElectronCapture::GetMeanFreePath(const G4Track&, G4double, G4ForceCondition*)
135 {
136 return DBL_MAX;
137 }
138