| Geant4 Cross Reference |
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25 //
26
27 #include "G4VAdjointReverseReaction.hh"
28
29 #include "G4AdjointCSManager.hh"
30 #include "G4ParticleChange.hh"
31 #include "G4VEmAdjointModel.hh"
32
33 G4VAdjointReverseReaction::G4VAdjointReverseReaction(const G4String& process_name,
34 G4bool whichScatCase)
35 : G4VDiscreteProcess(process_name)
36 {
37 fCSManager = G4AdjointCSManager::GetAdjointCSManager();
38 fIsScatProjToProj = whichScatCase;
39 fParticleChange = new G4ParticleChange();
40 }
41
42 //////////////////////////////////////////////////////////////////////////////
43 G4VAdjointReverseReaction::~G4VAdjointReverseReaction()
44 {
45 if(fParticleChange)
46 delete fParticleChange;
47 }
48
49 //////////////////////////////////////////////////////////////////////////////
50 void G4VAdjointReverseReaction::BuildPhysicsTable(const G4ParticleDefinition&)
51 {
52 fCSManager->BuildCrossSectionMatrices(); // it will be done just once
53 fCSManager->BuildTotalSigmaTables();
54 }
55
56 //////////////////////////////////////////////////////////////////////////////
57 G4VParticleChange* G4VAdjointReverseReaction::PostStepDoIt(const G4Track& track,
58 const G4Step&)
59 {
60 fParticleChange->Initialize(track);
61 fAdjointModel->SampleSecondaries(track, fIsScatProjToProj, fParticleChange);
62
63 ClearNumberOfInteractionLengthLeft();
64 return fParticleChange;
65 }
66
67 //////////////////////////////////////////////////////////////////////////////
68 G4double G4VAdjointReverseReaction::GetMeanFreePath(const G4Track& track,
69 G4double,
70 G4ForceCondition* condition)
71 {
72 *condition = NotForced;
73 G4double preStepKinEnergy = track.GetKineticEnergy();
74
75 if(track.GetTrackID() != fTrackId)
76 {
77 fTrackId = track.GetTrackID();
78 }
79 G4double sigma = fAdjointModel->AdjointCrossSection(
80 track.GetMaterialCutsCouple(), preStepKinEnergy, fIsScatProjToProj);
81
82 G4double corr = fCSManager->GetCrossSectionCorrection(
83 track.GetDefinition(), preStepKinEnergy, track.GetMaterialCutsCouple(),
84 fIsFwdCSUsed);
85
86 if(std::fabs(corr) > 100.)
87 {
88 sigma = 0.0;
89 }
90 else
91 {
92 sigma *= corr;
93 }
94
95 G4double mean_free_path = 1.e60;
96 if(sigma > 0.)
97 mean_free_path = 1. / sigma;
98
99 return mean_free_path;
100 }
101