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: G4PolarizedMollerCrossSection.hh,v 1.3 2006/12/13 15:44:36 gunter Exp $ |
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27 | // GEANT4 tag $Name: geant4-09-03-cand-01 $ |
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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: G4PolarizedMollerCrossSection |
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33 | // |
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34 | // Author: Andreas Schaelicke |
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35 | // |
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36 | // Creation date: 12.01.2006 |
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37 | // |
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38 | // Modifications: |
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39 | // 16-01-06 included cross section as calculated by P.Starovoitov |
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40 | // |
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41 | // Class Description: |
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42 | // * calculates the differential cross section |
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43 | // incomming electron (along positive z direction) scatters at an electron at rest |
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44 | // * phi denotes the angle between the scattering plane (defined by the |
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45 | // outgoing electron) and X-axis |
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46 | // * all stokes vectors refer to spins in the Global System (X,Y,Z) |
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47 | // |
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48 | #ifndef G4PolarizedMollerCrossSection_h |
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49 | #define G4PolarizedMollerCrossSection_h 1 |
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50 | |
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51 | #include "G4StokesVector.hh" |
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52 | #include "G4VPolarizedCrossSection.hh" |
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53 | |
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54 | class G4PolarizedMollerCrossSection : public G4VPolarizedCrossSection |
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55 | { |
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56 | public: |
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57 | G4PolarizedMollerCrossSection(); |
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58 | virtual ~G4PolarizedMollerCrossSection(); |
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59 | public: |
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60 | void Initialize(G4double x, G4double y, G4double phi, |
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61 | const G4StokesVector & p0,const G4StokesVector & p1, |
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62 | G4int flag=0); |
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63 | |
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64 | G4double XSection(const G4StokesVector & pol2,const G4StokesVector & pol3); |
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65 | G4double TotalXSection(G4double xmin, G4double xmax, G4double y, |
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66 | const G4StokesVector & pol0,const G4StokesVector & pol1); |
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67 | // return expected mean polarisation |
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68 | G4StokesVector GetPol2(); |
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69 | G4StokesVector GetPol3(); |
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70 | private: |
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71 | G4double phi0; |
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72 | // - part depending on the polarization of the final electron P1 |
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73 | G4ThreeVector phi2; |
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74 | // - part depending on the polarization of the final electron P2 |
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75 | G4ThreeVector phi3; |
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76 | |
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77 | }; |
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78 | #endif |
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