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25 //
26 //---------------------------------------------------------------------------
27 //
28 // ClassName: G4ElectronCapture
29 //
30 // Description: The process to kill particles to save CPU
31 //
32 // Author: V.Ivanchenko 31 August 2010
33 //
34 //----------------------------------------------------------------------------
35 //
36 // This example is provided by the Geant4-DNA collaboration
37 // Any report or published results obtained using the Geant4-DNA software
38 // and the DNA geometry given in the Geom_DNA example
39 // shall cite the following Geant4-DNA collaboration publications:
40 // [1] NIM B 298 (2013) 47-54
41 // [2] Med. Phys. 37 (2010) 4692-4708
42 // The Geant4-DNA web site is available at http://geant4-dna.org
43 //
44 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
45 //
46 /// \file G4ElectronCapture.cc
47 /// \brief Implementation of the G4ElectronCapture class
48
49 #include "G4ElectronCapture.hh"
50
51 #include "G4Electron.hh"
52 #include "G4ParticleDefinition.hh"
53 #include "G4Region.hh"
54 #include "G4RegionStore.hh"
55 #include "G4Step.hh"
56 #include "G4SystemOfUnits.hh"
57 #include "G4Track.hh"
58
59 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
60
61 G4ElectronCapture::G4ElectronCapture(const G4String& regName, G4double ekinlim)
62 : G4VDiscreteProcess("eCapture", fElectromagnetic),
63 fKinEnergyThreshold(ekinlim),
64 fRegionName(regName),
65 region(0)
66 {
67 if (regName == "" || regName == "world") {
68 fRegionName = "DefaultRegionForTheWorld";
69 }
70 pParticleChange = &fParticleChange;
71 }
72
73 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
74
75 G4ElectronCapture::~G4ElectronCapture() {}
76
77 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
78
79 void G4ElectronCapture::SetKinEnergyLimit(G4double val)
80 {
81 fKinEnergyThreshold = val;
82 if (verboseLevel > 0) {
83 G4cout << "### G4ElectronCapture: Tracking cut E(MeV) = " << fKinEnergyThreshold / MeV
84 << G4endl;
85 }
86 }
87 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
88
89 void G4ElectronCapture::BuildPhysicsTable(const G4ParticleDefinition&)
90 {
91 region = (G4RegionStore::GetInstance())->GetRegion(fRegionName);
92 if (region && verboseLevel > 0) {
93 G4cout << "### G4ElectronCapture: Tracking cut E(MeV) = " << fKinEnergyThreshold / MeV
94 << " is assigned to " << fRegionName << G4endl;
95 }
96 }
97
98 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
99
100 G4bool G4ElectronCapture::IsApplicable(const G4ParticleDefinition&)
101 {
102 return true;
103 }
104
105 G4double G4ElectronCapture::PostStepGetPhysicalInteractionLength(const G4Track& aTrack, G4double,
106 G4ForceCondition* condition)
107 {
108 // condition is set to "Not Forced"
109 *condition = NotForced;
110
111 G4double limit = DBL_MAX;
112 if (region) {
113 if (aTrack.GetVolume()->GetLogicalVolume()->GetRegion() == region
114 && aTrack.GetKineticEnergy() < fKinEnergyThreshold)
115 {
116 limit = 0.0;
117 }
118 }
119 return limit;
120 }
121
122 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
123
124 G4VParticleChange* G4ElectronCapture::PostStepDoIt(const G4Track& aTrack, const G4Step&)
125 {
126 pParticleChange->Initialize(aTrack);
127 pParticleChange->ProposeTrackStatus(fStopAndKill);
128 pParticleChange->ProposeLocalEnergyDeposit(aTrack.GetKineticEnergy());
129 fParticleChange.SetProposedKineticEnergy(0.0);
130 return pParticleChange;
131 }
132
133 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
134
135 G4double G4ElectronCapture::GetMeanFreePath(const G4Track&, G4double, G4ForceCondition*)
136 {
137 return DBL_MAX;
138 }
139
140 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
141