| 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: geant4-09-04-beta-01 $ |
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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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