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25 // 25 //
26 // ------------------------------------------- 26 // -------------------------------------------------------------------
27 // 27 //
28 // Geant4 class file 28 // Geant4 class file
29 // 29 //
30 // File name: G4PolarizedBremsstrahlungMod 30 // File name: G4PolarizedBremsstrahlungModel
31 // 31 //
32 // Author: Karim Laihem 32 // Author: Karim Laihem
33 33
34 #include "G4PolarizedBremsstrahlungModel.hh" 34 #include "G4PolarizedBremsstrahlungModel.hh"
35 35
36 #include "G4ParticleChangeForLoss.hh" 36 #include "G4ParticleChangeForLoss.hh"
37 #include "G4PolarizationHelper.hh" 37 #include "G4PolarizationHelper.hh"
38 #include "G4PolarizedBremsstrahlungXS.hh" 38 #include "G4PolarizedBremsstrahlungXS.hh"
39 39
40 G4PolarizedBremsstrahlungModel::G4PolarizedBre 40 G4PolarizedBremsstrahlungModel::G4PolarizedBremsstrahlungModel(
41 const G4ParticleDefinition* p, const G4Strin 41 const G4ParticleDefinition* p, const G4String& nam)
42 : G4SeltzerBergerModel(p, nam) 42 : G4SeltzerBergerModel(p, nam)
43 , fCrossSectionCalculator(nullptr) 43 , fCrossSectionCalculator(nullptr)
44 {} 44 {}
45 45
46 //....oooOO0OOooo........oooOO0OOooo........oo 46 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
47 G4PolarizedBremsstrahlungModel::~G4PolarizedBr 47 G4PolarizedBremsstrahlungModel::~G4PolarizedBremsstrahlungModel()
48 { 48 {
49 if(fCrossSectionCalculator) 49 if(fCrossSectionCalculator)
50 delete fCrossSectionCalculator; 50 delete fCrossSectionCalculator;
51 } 51 }
52 52
53 //....oooOO0OOooo........oooOO0OOooo........oo 53 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
54 void G4PolarizedBremsstrahlungModel::Initialis 54 void G4PolarizedBremsstrahlungModel::Initialise(const G4ParticleDefinition* p,
55 55 const G4DataVector& d)
56 { 56 {
57 G4SeltzerBergerModel::Initialise(p, d); 57 G4SeltzerBergerModel::Initialise(p, d);
58 if(!fCrossSectionCalculator) 58 if(!fCrossSectionCalculator)
59 fCrossSectionCalculator = new G4PolarizedB 59 fCrossSectionCalculator = new G4PolarizedBremsstrahlungXS();
60 } 60 }
61 61
62 //....oooOO0OOooo........oooOO0OOooo........oo 62 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
63 // The emitted gamma energy is sampled using a 63 // The emitted gamma energy is sampled using a parametrized formula
64 void G4PolarizedBremsstrahlungModel::SampleSec 64 void G4PolarizedBremsstrahlungModel::SampleSecondaries(
65 std::vector<G4DynamicParticle*>* vdp, const 65 std::vector<G4DynamicParticle*>* vdp, const G4MaterialCutsCouple* couple,
66 const G4DynamicParticle* dp, G4double tmin, 66 const G4DynamicParticle* dp, G4double tmin, G4double maxEnergy)
67 { 67 {
68 G4SeltzerBergerModel::SampleSecondaries(vdp, 68 G4SeltzerBergerModel::SampleSecondaries(vdp, couple, dp, tmin, maxEnergy);
69 std::size_t num = vdp->size(); 69 std::size_t num = vdp->size();
70 70
71 if(num > 0) 71 if(num > 0)
72 { 72 {
73 G4double lepEnergy0 = dp->GetKineticEnergy 73 G4double lepEnergy0 = dp->GetKineticEnergy();
74 G4double gamEnergy1 = (*vdp)[0]->GetKineti 74 G4double gamEnergy1 = (*vdp)[0]->GetKineticEnergy();
75 G4double sintheta = 75 G4double sintheta =
76 dp->GetMomentumDirection().cross((*vdp)[ 76 dp->GetMomentumDirection().cross((*vdp)[0]->GetMomentumDirection()).mag();
77 if(sintheta > 1.) 77 if(sintheta > 1.)
78 sintheta = 1.; 78 sintheta = 1.;
79 79
80 G4StokesVector beamPol = G4StokesVector(dp 80 G4StokesVector beamPol = G4StokesVector(dp->GetPolarization());
81 81
82 // determine interaction plane 82 // determine interaction plane
83 G4ThreeVector nInteractionFrame = G4Polari 83 G4ThreeVector nInteractionFrame = G4PolarizationHelper::GetFrame(
84 dp->GetMomentumDirection(), 84 dp->GetMomentumDirection(),
85 fParticleChange->GetProposedMomentumDire 85 fParticleChange->GetProposedMomentumDirection());
86 86
87 // transform polarization into interaction 87 // transform polarization into interaction frame
88 beamPol.InvRotateAz(nInteractionFrame, dp- 88 beamPol.InvRotateAz(nInteractionFrame, dp->GetMomentumDirection());
89 89
90 // calculate polarization transfer 90 // calculate polarization transfer
91 fCrossSectionCalculator->SetMaterial( 91 fCrossSectionCalculator->SetMaterial(
92 GetCurrentElement()->GetN(), // number 92 GetCurrentElement()->GetN(), // number of nucleons
93 GetCurrentElement()->GetZ(), GetCurrentE 93 GetCurrentElement()->GetZ(), GetCurrentElement()->GetfCoulomb());
94 fCrossSectionCalculator->Initialize(lepEne 94 fCrossSectionCalculator->Initialize(lepEnergy0, gamEnergy1, sintheta,
95 beamPo 95 beamPol, G4StokesVector::ZERO);
96 96
97 // determine final state polarization 97 // determine final state polarization
98 G4StokesVector newBeamPol = fCrossSectionC 98 G4StokesVector newBeamPol = fCrossSectionCalculator->GetPol2();
99 newBeamPol.RotateAz(nInteractionFrame, 99 newBeamPol.RotateAz(nInteractionFrame,
100 fParticleChange->GetPr 100 fParticleChange->GetProposedMomentumDirection());
101 fParticleChange->ProposePolarization(newBe 101 fParticleChange->ProposePolarization(newBeamPol);
102 102
103 if(num != 1) 103 if(num != 1)
104 { 104 {
105 G4ExceptionDescription ed; 105 G4ExceptionDescription ed;
106 ed << num << " secondaries in polarized 106 ed << num << " secondaries in polarized bremsstrahlung not supported!\n";
107 G4Exception("G4PolarizedBremsstrahlungMo 107 G4Exception("G4PolarizedBremsstrahlungModel::SampleSecondaries", "pol001",
108 JustWarning, ed); 108 JustWarning, ed);
109 } 109 }
110 for(std::size_t i = 0; i < num; ++i) 110 for(std::size_t i = 0; i < num; ++i)
111 { 111 {
112 G4StokesVector photonPol = fCrossSection 112 G4StokesVector photonPol = fCrossSectionCalculator->GetPol3();
113 photonPol.SetPhoton(); 113 photonPol.SetPhoton();
114 photonPol.RotateAz(nInteractionFrame, (* 114 photonPol.RotateAz(nInteractionFrame, (*vdp)[i]->GetMomentumDirection());
115 (*vdp)[i]->SetPolarization(photonPol.p1( 115 (*vdp)[i]->SetPolarization(photonPol.p1(), photonPol.p2(),
116 photonPol.p3( 116 photonPol.p3());
117 } 117 }
118 } 118 }
119 return; 119 return;
120 } 120 }
121 121