| 1 | //
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| 2 | // ********************************************************************
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| 3 | // * License and Disclaimer *
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| 4 | // * *
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of *
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and *
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| 7 | // * conditions of the Geant4 Software License, included in the file *
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These *
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| 9 | // * include a list of copyright holders. *
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| 10 | // * *
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| 11 | // * Neither the authors of this software system, nor their employing *
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| 12 | // * institutes,nor the agencies providing financial support for this *
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| 13 | // * work make any representation or warranty, express or implied, *
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| 14 | // * regarding this software system or assume any liability for its *
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| 15 | // * use. Please see the license in the file LICENSE and URL above *
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| 16 | // * for the full disclaimer and the limitation of liability. *
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| 17 | // * *
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| 18 | // * This code implementation is the result of the scientific and *
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| 19 | // * technical work of the GEANT4 collaboration. *
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| 20 | // * By using, copying, modifying or distributing the software (or *
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| 21 | // * any work based on the software) you agree to acknowledge its *
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| 22 | // * use in resulting scientific publications, and indicate your *
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| 23 | // * acceptance of all terms of the Geant4 Software license. *
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| 24 | // ********************************************************************
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| 25 | //
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| 26 | // $Id: G4PolarizedPairProductionCrossSection.hh,v 1.3 2007/11/01 17:32:34 schaelic Exp $
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| 27 | // GEANT4 tag $Name: geant4-09-02 $
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| 28 | //
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| 29 | // GEANT4 Class file
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| 30 | //
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| 31 | //
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| 32 | // File name: G4PolarizedPairProductionCrossSection
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| 33 | //
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| 34 | // Author: Karim Laihem
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| 35 | //
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| 36 | // Creation date: 15.05.2005
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| 37 | //
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| 38 | // Modifications:
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| 39 | // 20-08-06 updated interface to geant4.8.1 (A.Schaelicke)
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| 40 | // 15-10-07 introduced a more general framework for cross sections (AS)
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| 41 | //
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| 42 | // Class Description:
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| 43 | // determine the polarization of the final state
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| 44 | // in a Bremsstrahlung scattering process employing the differential
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| 45 | // cross section by Olsen and Maximon
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| 46 | //
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| 47 | #ifndef G4PolarizedPairProductionCrossSection_h
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| 48 | #define G4PolarizedPairProductionCrossSection_h 1
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| 49 |
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| 50 | #include "G4StokesVector.hh"
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| 51 | #include "G4VPolarizedCrossSection.hh"
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| 52 |
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| 53 |
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| 54 | class G4PolarizedPairProductionCrossSection : public G4VPolarizedCrossSection
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| 55 | {
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| 56 | public:
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| 57 | G4PolarizedPairProductionCrossSection();
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| 58 | virtual void Initialize(G4double eps, G4double X, G4double phi,
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| 59 | const G4StokesVector & p0,
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| 60 | const G4StokesVector & p1,
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| 61 | G4int flag=0);
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| 62 | virtual G4double XSection(const G4StokesVector & pol2,
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| 63 | const G4StokesVector & pol3);
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| 64 |
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| 65 | // return expected mean polarisation
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| 66 | G4StokesVector GetPol2(); // electron/positron
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| 67 | G4StokesVector GetPol3(); // photon
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| 68 | private:
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| 69 |
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| 70 | G4StokesVector theFinalElectronPolarization;
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| 71 | G4StokesVector theFinalPositronPolarization;
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| 72 |
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| 73 | void InitializeMe();
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| 74 |
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| 75 | static G4bool scrnInitialized;
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| 76 | static G4double SCRN [3][20]; // screening function lookup table;
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| 77 | };
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| 78 |
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| 79 | #endif
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