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25 //
26 // File name: G4VPolarizedXS
27 //
28 // Author: Andreas Schaelicke
29 //
30 // Class Description:
31 // (virtual) interface class
32 // provides readable but efficient routines to determine
33 // polarization for the final state of a given process
34 // empoying the differential cross section
35
36 #include "G4VPolarizedXS.hh"
37
38 #include "Randomize.hh"
39
40 G4VPolarizedXS::G4VPolarizedXS()
41 : fXmin(0)
42 , fXmax(1.)
43 , fYmin(1.)
44 , fA(1.)
45 , fZ(1.)
46 , fCoul(0.)
47 {}
48
49 G4VPolarizedXS::~G4VPolarizedXS() {}
50
51 void G4VPolarizedXS::Initialize(G4double, G4double, G4double,
52 const G4StokesVector&, const G4StokesVector&,
53 G4int)
54 {}
55
56 G4StokesVector G4VPolarizedXS::GetPol2()
57 {
58 // neglects correlation effects!
59 G4double invXsecTotal =
60 1. / XSection(G4StokesVector::ZERO, G4StokesVector::ZERO);
61 G4double xsPol1 = XSection(G4StokesVector::P1, G4StokesVector::ZERO);
62 G4double xsPol2 = XSection(G4StokesVector::P2, G4StokesVector::ZERO);
63 G4double xsPol3 = XSection(G4StokesVector::P3, G4StokesVector::ZERO);
64 return G4StokesVector(G4ThreeVector(
65 invXsecTotal * xsPol1, invXsecTotal * xsPol2, invXsecTotal * xsPol3));
66 }
67
68 G4StokesVector G4VPolarizedXS::GetPol3()
69 {
70 // neglects correlation effects!
71 G4double invXsecTotal =
72 1. / XSection(G4StokesVector::ZERO, G4StokesVector::ZERO);
73 G4double xsPol1 = XSection(G4StokesVector::ZERO, G4StokesVector::P1);
74 G4double xsPol2 = XSection(G4StokesVector::ZERO, G4StokesVector::P2);
75 G4double xsPol3 = XSection(G4StokesVector::ZERO, G4StokesVector::P3);
76 return G4StokesVector(G4ThreeVector(
77 invXsecTotal * xsPol1, invXsecTotal * xsPol2, invXsecTotal * xsPol3));
78 }
79
80 // minimal energy fraction in TotalXSection
81 G4double G4VPolarizedXS::GetXmin(G4double /*y*/) { return fXmin; }
82
83 // maximal energy fraction in TotalXSection
84 G4double G4VPolarizedXS::GetXmax(G4double /*y*/) { return fXmax; }
85
86 G4double G4VPolarizedXS::TotalXSection(G4double, G4double, G4double,
87 const G4StokesVector&,
88 const G4StokesVector&)
89 {
90 G4ExceptionDescription ed;
91 ed << "WARNING virtual function G4VPolarizedXS::TotalXSection() "
92 "called.\n";
93 G4Exception("G4VPolarizedXS::TotalXSection", "pol032", FatalException, ed);
94 return 0.;
95 }
96