Gabriele Cosmo
96 lines
3.9 KiB
C++
96 lines
3.9 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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// File name: G4VPolarizedXS
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//
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// Author: Andreas Schaelicke
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//
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// Class Description:
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// (virtual) interface class
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// provides readable but efficient routines to determine
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// polarization for the final state of a given process
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// empoying the differential cross section
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#include "G4VPolarizedXS.hh"
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#include "Randomize.hh"
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G4VPolarizedXS::G4VPolarizedXS()
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: fXmin(0)
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, fXmax(1.)
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, fYmin(1.)
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, fA(1.)
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, fZ(1.)
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, fCoul(0.)
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{}
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G4VPolarizedXS::~G4VPolarizedXS() {}
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void G4VPolarizedXS::Initialize(G4double, G4double, G4double,
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const G4StokesVector&, const G4StokesVector&,
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G4int)
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{}
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G4StokesVector G4VPolarizedXS::GetPol2()
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{
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// neglects correlation effects!
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G4double invXsecTotal =
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1. / XSection(G4StokesVector::ZERO, G4StokesVector::ZERO);
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G4double xsPol1 = XSection(G4StokesVector::P1, G4StokesVector::ZERO);
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G4double xsPol2 = XSection(G4StokesVector::P2, G4StokesVector::ZERO);
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G4double xsPol3 = XSection(G4StokesVector::P3, G4StokesVector::ZERO);
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return G4StokesVector(G4ThreeVector(
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invXsecTotal * xsPol1, invXsecTotal * xsPol2, invXsecTotal * xsPol3));
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}
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G4StokesVector G4VPolarizedXS::GetPol3()
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{
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// neglects correlation effects!
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G4double invXsecTotal =
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1. / XSection(G4StokesVector::ZERO, G4StokesVector::ZERO);
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G4double xsPol1 = XSection(G4StokesVector::ZERO, G4StokesVector::P1);
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G4double xsPol2 = XSection(G4StokesVector::ZERO, G4StokesVector::P2);
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G4double xsPol3 = XSection(G4StokesVector::ZERO, G4StokesVector::P3);
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return G4StokesVector(G4ThreeVector(
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invXsecTotal * xsPol1, invXsecTotal * xsPol2, invXsecTotal * xsPol3));
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}
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// minimal energy fraction in TotalXSection
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G4double G4VPolarizedXS::GetXmin(G4double /*y*/) { return fXmin; }
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// maximal energy fraction in TotalXSection
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G4double G4VPolarizedXS::GetXmax(G4double /*y*/) { return fXmax; }
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G4double G4VPolarizedXS::TotalXSection(G4double, G4double, G4double,
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const G4StokesVector&,
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const G4StokesVector&)
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{
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G4ExceptionDescription ed;
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ed << "WARNING virtual function G4VPolarizedXS::TotalXSection() "
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"called.\n";
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G4Exception("G4VPolarizedXS::TotalXSection", "pol032", FatalException, ed);
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return 0.;
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}
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