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 | // |
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27 | // Author: Luciano Pandola |
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28 | // |
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29 | // History: |
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30 | // ----------- |
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31 | // 01 Jul 2003 L. Pandola 1st implementation |
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32 | // |
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33 | // ------------------------------------------------------------------- |
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34 | // Class description: |
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35 | // Low Energy Electromagnetic Physics, Positron Annihilation |
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36 | // Penelope Model |
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37 | // ------------------------------------------------------------------- |
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38 | |
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39 | #ifndef G4PenelopeAnnihilation_h |
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40 | #define G4PenelopeAnnihilation_h 1 |
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41 | |
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42 | #include "globals.hh" |
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43 | #include "G4VRestDiscreteProcess.hh" |
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44 | |
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45 | class G4PhysicsTableclass; |
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46 | class G4ParticleDefinition; |
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47 | class G4VParticleChange; |
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48 | class G4Track; |
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49 | class G4Step; |
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50 | class G4Material; |
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51 | |
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52 | class G4PenelopeAnnihilation : public G4VRestDiscreteProcess |
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53 | { |
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54 | public: |
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55 | |
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56 | G4PenelopeAnnihilation(const G4String& processName ="PenAnnih"); |
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57 | |
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58 | ~G4PenelopeAnnihilation(); |
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59 | |
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60 | G4bool IsApplicable(const G4ParticleDefinition&); |
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61 | |
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62 | void BuildPhysicsTable(const G4ParticleDefinition&); |
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63 | |
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64 | void PrintInfoDefinition(); |
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65 | |
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66 | G4double DumpMeanFreePath(const G4Track& aTrack, |
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67 | G4double previousStepSize, |
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68 | G4ForceCondition* condition) |
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69 | { return GetMeanFreePath(aTrack, previousStepSize, condition); } |
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70 | |
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71 | protected: |
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72 | G4double GetMeanFreePath(const G4Track&,G4double, |
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73 | G4ForceCondition*); |
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74 | |
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75 | public: |
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76 | |
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77 | G4VParticleChange* PostStepDoIt(const G4Track& aTrack, |
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78 | const G4Step& aStep); |
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79 | |
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80 | G4double GetMeanLifeTime(const G4Track& aTrack, |
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81 | G4ForceCondition* condition); |
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82 | |
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83 | G4VParticleChange* AtRestDoIt(const G4Track& aTrack, |
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84 | const G4Step& aStep); |
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85 | |
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86 | private: |
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87 | |
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88 | G4double calculateCrossSectionPerElectron(G4double energy); |
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89 | |
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90 | |
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91 | private: |
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92 | |
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93 | // hide assignment operator as private |
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94 | G4PenelopeAnnihilation& operator=(const G4PenelopeAnnihilation& right); |
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95 | G4PenelopeAnnihilation(const G4PenelopeAnnihilation& ); |
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96 | |
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97 | private: |
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98 | G4PhysicsTable* meanFreePathTable; |
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99 | |
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100 | G4double lowEnergyLimit; // low energy limit of the tables |
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101 | G4double highEnergyLimit; // high energy limit of the tables |
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102 | G4int nBins; // number of bins in the tables |
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103 | G4double cutForLowEnergySecondaryPhotons; |
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104 | }; |
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105 | |
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106 | #endif |
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107 | |
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