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: G4VPolarizedCrossSection.hh,v 1.4 2007/11/01 17:32:34 schaelic Exp $ |
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27 | // GEANT4 tag $Name: geant4-09-03 $ |
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28 | // |
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29 | // File name: G4VPolarizedCrossSection |
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30 | // |
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31 | // Author: Andreas Schaelicke |
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32 | // |
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33 | // Creation date: 15.05.2005 |
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34 | // |
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35 | // Modifications: |
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36 | // |
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37 | // Class Description: |
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38 | // (pure virtual) interface class |
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39 | // |
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40 | // provides readable but efficient routines to determine |
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41 | // polarization for the final state of a given process |
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42 | // empoying the differential cross section |
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43 | // |
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44 | |
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45 | #ifndef G4VPolarizedCrossSection_h |
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46 | #define G4VPolarizedCrossSection_h 1 |
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47 | |
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48 | #include "G4StokesVector.hh" |
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49 | |
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50 | |
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51 | class G4VPolarizedCrossSection |
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52 | { |
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53 | public: |
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54 | G4VPolarizedCrossSection(); |
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55 | virtual ~G4VPolarizedCrossSection(); |
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56 | |
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57 | public: |
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58 | virtual void Initialize(G4double, G4double, G4double, |
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59 | const G4StokesVector & p0,const G4StokesVector & p1, |
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60 | G4int flag=0); |
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61 | virtual G4double XSection(const G4StokesVector & pol2,const G4StokesVector & pol3) = 0; |
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62 | virtual G4double TotalXSection(G4double xmin, G4double xmax, G4double y, |
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63 | const G4StokesVector & pol0, |
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64 | const G4StokesVector & pol1); |
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65 | |
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66 | // return expected mean polarisation |
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67 | virtual G4StokesVector GetPol2(); |
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68 | virtual G4StokesVector GetPol3(); |
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69 | |
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70 | // return basic kinematics properties |
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71 | // minimal gamma value in TotalXSection |
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72 | inline G4double GetYmin() {return fYmin; } |
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73 | // minimal energy fraction in TotalXSection |
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74 | virtual G4double GetXmin(G4double y); |
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75 | // maximal energy fraction in TotalXSection |
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76 | virtual G4double GetXmax(G4double y); |
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77 | |
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78 | // return appropriate distribute polarisation states; |
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79 | // void DicePolarization(); |
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80 | // G4StokesVector DicedPol2(); |
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81 | // G4StokesVector DicedPol3(); |
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82 | inline void SetMaterial(G4double A, G4double Z, G4double coul) |
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83 | { theA=A; theZ=Z; fCoul=coul; } |
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84 | protected: |
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85 | // define kinematics properties |
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86 | inline void SetXmin(G4double xmin) { fXmin=xmin;} |
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87 | inline void SetXmax(G4double xmax) { fXmax=xmax;} |
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88 | inline void SetYmin(G4double ymin) { fYmin=ymin;} |
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89 | |
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90 | // kinematic properties |
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91 | G4double fXmin, fXmax, fYmin; |
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92 | // material properties |
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93 | G4double theA, theZ; |
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94 | G4double fCoul; |
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95 | }; |
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96 | |
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97 | |
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98 | #endif |
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