| Geant4 Cross Reference |
1 // 1
2 // *******************************************
3 // * License and Disclaimer
4 // *
5 // * The Geant4 software is copyright of th
6 // * the Geant4 Collaboration. It is provided
7 // * conditions of the Geant4 Software License
8 // * LICENSE and available at http://cern.ch/
9 // * include a list of copyright holders.
10 // *
11 // * Neither the authors of this software syst
12 // * institutes,nor the agencies providing fin
13 // * work make any representation or warran
14 // * regarding this software system or assum
15 // * use. Please see the license in the file
16 // * for the full disclaimer and the limitatio
17 // *
18 // * This code implementation is the result
19 // * technical work of the GEANT4 collaboratio
20 // * By using, copying, modifying or distri
21 // * any work based on the software) you ag
22 // * use in resulting scientific publicati
23 // * acceptance of all terms of the Geant4 Sof
24 // *******************************************
25 //
26 // -------------------------------------------
27 //
28 // Geant4 class file
29 //
30 // File name: G4PolarizedBremsstrahlungMod
31 //
32 // Author: Karim Laihem
33
34 #include "G4PolarizedBremsstrahlungModel.hh"
35
36 #include "G4ParticleChangeForLoss.hh"
37 #include "G4PolarizationHelper.hh"
38 #include "G4PolarizedBremsstrahlungXS.hh"
39
40 G4PolarizedBremsstrahlungModel::G4PolarizedBre
41 const G4ParticleDefinition* p, const G4Strin
42 : G4SeltzerBergerModel(p, nam)
43 , fCrossSectionCalculator(nullptr)
44 {}
45
46 //....oooOO0OOooo........oooOO0OOooo........oo
47 G4PolarizedBremsstrahlungModel::~G4PolarizedBr
48 {
49 if(fCrossSectionCalculator)
50 delete fCrossSectionCalculator;
51 }
52
53 //....oooOO0OOooo........oooOO0OOooo........oo
54 void G4PolarizedBremsstrahlungModel::Initialis
55
56 {
57 G4SeltzerBergerModel::Initialise(p, d);
58 if(!fCrossSectionCalculator)
59 fCrossSectionCalculator = new G4PolarizedB
60 }
61
62 //....oooOO0OOooo........oooOO0OOooo........oo
63 // The emitted gamma energy is sampled using a
64 void G4PolarizedBremsstrahlungModel::SampleSec
65 std::vector<G4DynamicParticle*>* vdp, const
66 const G4DynamicParticle* dp, G4double tmin,
67 {
68 G4SeltzerBergerModel::SampleSecondaries(vdp,
69 std::size_t num = vdp->size();
70
71 if(num > 0)
72 {
73 G4double lepEnergy0 = dp->GetKineticEnergy
74 G4double gamEnergy1 = (*vdp)[0]->GetKineti
75 G4double sintheta =
76 dp->GetMomentumDirection().cross((*vdp)[
77 if(sintheta > 1.)
78 sintheta = 1.;
79
80 G4StokesVector beamPol = G4StokesVector(dp
81
82 // determine interaction plane
83 G4ThreeVector nInteractionFrame = G4Polari
84 dp->GetMomentumDirection(),
85 fParticleChange->GetProposedMomentumDire
86
87 // transform polarization into interaction
88 beamPol.InvRotateAz(nInteractionFrame, dp-
89
90 // calculate polarization transfer
91 fCrossSectionCalculator->SetMaterial(
92 GetCurrentElement()->GetN(), // number
93 GetCurrentElement()->GetZ(), GetCurrentE
94 fCrossSectionCalculator->Initialize(lepEne
95 beamPo
96
97 // determine final state polarization
98 G4StokesVector newBeamPol = fCrossSectionC
99 newBeamPol.RotateAz(nInteractionFrame,
100 fParticleChange->GetPr
101 fParticleChange->ProposePolarization(newBe
102
103 if(num != 1)
104 {
105 G4ExceptionDescription ed;
106 ed << num << " secondaries in polarized
107 G4Exception("G4PolarizedBremsstrahlungMo
108 JustWarning, ed);
109 }
110 for(std::size_t i = 0; i < num; ++i)
111 {
112 G4StokesVector photonPol = fCrossSection
113 photonPol.SetPhoton();
114 photonPol.RotateAz(nInteractionFrame, (*
115 (*vdp)[i]->SetPolarization(photonPol.p1(
116 photonPol.p3(
117 }
118 }
119 return;
120 }
121