| 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 | // G4AntiNeutronAnnihilationAtRest physics process |
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| 27 | // Larry Felawka (TRIUMF), April 1998 |
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| 28 | //--------------------------------------------------------------------- |
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| 29 | |
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| 30 | #ifndef G4AntiNeutronAnnihilationAtRest_h |
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| 31 | #define G4AntiNeutronAnnihilationAtRest_h 1 |
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| 32 | |
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| 33 | // Class Description: |
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| 34 | // |
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| 35 | // Process for absorption of n-bar at rest. |
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| 36 | // To be used in your physics list in case you need this physics. |
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| 37 | |
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| 38 | #include "globals.hh" |
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| 39 | #include "Randomize.hh" |
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| 40 | #include "G4VRestProcess.hh" |
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| 41 | #include "G4VParticleChange.hh" |
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| 42 | #include "G4ParticleDefinition.hh" |
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| 43 | #include "G4GHEKinematicsVector.hh" |
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| 44 | |
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| 45 | class G4AntiNeutronAnnihilationAtRest : public G4VRestProcess |
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| 46 | |
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| 47 | { |
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| 48 | private: |
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| 49 | // hide assignment operator as private |
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| 50 | G4AntiNeutronAnnihilationAtRest& operator=(const G4AntiNeutronAnnihilationAtRest &right); |
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| 51 | G4AntiNeutronAnnihilationAtRest(const G4AntiNeutronAnnihilationAtRest& ); |
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| 52 | |
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| 53 | public: |
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| 54 | |
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| 55 | G4AntiNeutronAnnihilationAtRest(const G4String& processName ="AntiNeutronAnnihilationAtRest", |
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| 56 | G4ProcessType aType = fHadronic ); |
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| 57 | |
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| 58 | ~G4AntiNeutronAnnihilationAtRest(); |
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| 59 | |
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| 60 | G4bool IsApplicable(const G4ParticleDefinition&); |
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| 61 | |
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| 62 | // null physics table |
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| 63 | void BuildPhysicsTable(const G4ParticleDefinition&){} |
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| 64 | |
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| 65 | G4double AtRestGetPhysicalInteractionLength(const G4Track&, |
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| 66 | G4ForceCondition*); |
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| 67 | |
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| 68 | // zero mean lifetime |
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| 69 | G4double GetMeanLifeTime(const G4Track& , |
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| 70 | G4ForceCondition* ) {return 0.0;} |
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| 71 | |
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| 72 | G4VParticleChange* AtRestDoIt(const G4Track&, const G4Step&); |
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| 73 | |
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| 74 | // return number of secondaries produced |
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| 75 | G4int GetNumberOfSecondaries(); |
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| 76 | |
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| 77 | // pointer to array containg kinematics of secondaries |
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| 78 | G4GHEKinematicsVector* GetSecondaryKinematics(); |
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| 79 | |
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| 80 | private: |
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| 81 | |
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| 82 | void GenerateSecondaries(); |
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| 83 | void Poisso( G4float, G4int* ); |
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| 84 | void Normal( G4float* ); |
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| 85 | void AntiNeutronAnnihilation( G4int* ); |
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| 86 | G4double ExNu( G4float ); |
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| 87 | G4int NFac( G4int ); |
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| 88 | |
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| 89 | private: |
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| 90 | |
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| 91 | // global time-of-flight of stopped AntiNeutron |
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| 92 | G4float globalTime; |
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| 93 | |
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| 94 | // atomic mass of target nucleus |
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| 95 | G4float targetAtomicMass; |
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| 96 | |
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| 97 | // charge of target nucleus |
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| 98 | G4float targetCharge; |
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| 99 | |
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| 100 | G4GHEKinematicsVector* pv; |
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| 101 | G4GHEKinematicsVector* eve; |
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| 102 | G4GHEKinematicsVector* gkin; |
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| 103 | |
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| 104 | G4float evapEnergy1; |
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| 105 | G4float evapEnergy3; |
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| 106 | |
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| 107 | G4int ngkine; |
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| 108 | |
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| 109 | G4int ntot; |
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| 110 | G4GHEKinematicsVector result; |
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| 111 | |
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| 112 | G4float massPionMinus; |
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| 113 | G4float massPionZero; |
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| 114 | G4float massPionPlus; |
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| 115 | G4float massGamma; |
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| 116 | G4float massAntiNeutron; |
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| 117 | G4float massNeutron; |
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| 118 | |
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| 119 | G4ParticleDefinition* pdefGamma; |
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| 120 | G4ParticleDefinition* pdefPionPlus; |
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| 121 | G4ParticleDefinition* pdefPionZero; |
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| 122 | G4ParticleDefinition* pdefPionMinus; |
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| 123 | G4ParticleDefinition* pdefProton; |
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| 124 | G4ParticleDefinition* pdefNeutron; |
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| 125 | G4ParticleDefinition* pdefAntiNeutron; |
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| 126 | G4ParticleDefinition* pdefDeuteron; |
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| 127 | G4ParticleDefinition* pdefTriton; |
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| 128 | G4ParticleDefinition* pdefAlpha; |
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| 129 | |
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| 130 | }; |
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| 131 | |
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| 132 | #endif |
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| 133 | |
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