[819] | 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 | // File name: G4KaonMinusAbsorptionAtRest.hh |
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| 27 | // |
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| 28 | // Author: Christian V"olcker (Christian.Volcker@cern.ch), |
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| 29 | // |
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| 30 | // Creation date: 10. November 1997 |
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| 31 | // |
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| 32 | // ------------------------------------------------------------------- |
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| 33 | |
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| 34 | #ifndef G4KaonMinusAbsorptionAtRest_h |
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| 35 | #define G4KaonMinusAbsorptionAtRest_h 1 |
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| 36 | |
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| 37 | // Class Description: |
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| 38 | // |
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| 39 | // Process for nuclear absorption of K- at rest. |
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| 40 | // To be used in your physics list in case you need this physics. |
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| 41 | |
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| 42 | #include "globals.hh" |
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| 43 | #include "Randomize.hh" |
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| 44 | #include "G4VRestProcess.hh" |
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| 45 | #include "G4ParticleTypes.hh" |
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| 46 | #include "G4Nucleus.hh" |
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| 47 | #include "G4DynamicParticle.hh" |
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| 48 | #include "G4DynamicParticleVector.hh" |
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[962] | 49 | #include "G4NucleiProperties.hh" |
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| 50 | #include "G4HadronicProcessType.hh" |
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[819] | 51 | |
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| 52 | |
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| 53 | // ********************************************************* |
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| 54 | class G4KaonMinusAbsorptionAtRest : public G4VRestProcess |
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| 55 | // ********************************************************* |
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| 56 | { |
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| 57 | private: |
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| 58 | // hide assignment operator as private |
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| 59 | G4KaonMinusAbsorptionAtRest& operator=(const G4KaonMinusAbsorptionAtRest &right); |
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| 60 | G4KaonMinusAbsorptionAtRest(const G4KaonMinusAbsorptionAtRest& ); |
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| 61 | public: |
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| 62 | G4KaonMinusAbsorptionAtRest(const G4String& processName ="KaonMinusAbsorptionAtRest", |
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| 63 | G4ProcessType aType = fHadronic ); |
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| 64 | ~G4KaonMinusAbsorptionAtRest(); |
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| 65 | |
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| 66 | //override methods... |
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| 67 | public: |
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| 68 | G4bool IsApplicable(const G4ParticleDefinition& particle) { |
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| 69 | return( particle == *(G4KaonMinus::KaonMinus()) ); |
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| 70 | } |
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| 71 | |
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[1055] | 72 | void PreparePhysicsTable(const G4ParticleDefinition&); |
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| 73 | |
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| 74 | void BuildPhysicsTable(const G4ParticleDefinition&); |
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| 75 | |
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[819] | 76 | // the main method ... |
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| 77 | G4VParticleChange* AtRestDoIt(const G4Track& aTrack, const G4Step& aStep); |
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| 78 | |
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| 79 | protected: // why?? might be private.... |
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| 80 | // zero mean lifetime |
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| 81 | G4double GetMeanLifeTime(const G4Track& aTrack, |
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| 82 | G4ForceCondition* ) |
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| 83 | { |
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| 84 | G4double result = 0; |
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| 85 | if(aTrack.GetMaterial()->GetNumberOfElements() == 1) |
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| 86 | if(aTrack.GetMaterial()->GetZ()<1.5) result = DBL_MAX; |
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| 87 | return result; |
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| 88 | } |
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| 89 | |
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| 90 | private: |
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| 91 | // returns proton or neutron with fermi-momentum |
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| 92 | G4DynamicParticle GetAbsorbingNucleon(); |
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| 93 | |
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| 94 | // returns proton or neutron particle definition; |
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| 95 | G4ParticleDefinition* SelectAbsorbingNucleon(); |
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| 96 | |
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| 97 | // provides the neutron halo factor for absorption on nucleus surface. |
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| 98 | // in the G4Nucleus |
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| 99 | G4double NeutronHaloFactor(G4double Z, G4double N); |
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| 100 | |
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| 101 | // creates the reaction products |
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| 102 | G4DynamicParticleVector* KaonNucleonReaction(); |
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| 103 | |
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| 104 | // secondary pion absorption in parent nucleus |
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| 105 | // if TRUE, then add excitation energy to the Nucleus |
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| 106 | G4bool AbsorbPionByNucleus(G4DynamicParticle* aPion); |
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| 107 | |
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| 108 | // secondary Sigma-Lambda conversion |
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| 109 | // if conversion Done, then add excitation energy to the Nucleus |
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| 110 | G4DynamicParticle *SigmaLambdaConversion(G4DynamicParticle* aSigma); |
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| 111 | |
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| 112 | // instance variables ... |
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| 113 | private: |
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| 114 | // pointer to current stopped hadron |
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| 115 | const G4DynamicParticle *stoppedHadron; |
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| 116 | |
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| 117 | // pointer to current target nucleus |
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| 118 | G4Nucleus* nucleus; |
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| 119 | |
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| 120 | // some constant parameters |
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| 121 | |
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| 122 | G4double pionAbsorptionRate; |
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| 123 | |
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| 124 | // primary production rates ( for absorption on Carbon) |
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| 125 | |
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| 126 | G4double rateLambdaZeroPiZero; |
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| 127 | G4double rateSigmaMinusPiPlus; |
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| 128 | G4double rateSigmaPlusPiMinus; |
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| 129 | G4double rateSigmaZeroPiZero; |
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| 130 | |
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| 131 | G4double rateLambdaZeroPiMinus; |
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| 132 | G4double rateSigmaZeroPiMinus; |
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| 133 | G4double rateSigmaMinusPiZero; |
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| 134 | |
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| 135 | |
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| 136 | // Sigma Lambda Conversion rates |
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| 137 | // for sigma- p -> lambda n |
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| 138 | // sigma+ n -> lambda p |
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| 139 | // sigma- n -> lambda |
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| 140 | |
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| 141 | G4double sigmaPlusLambdaConversionRate; |
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| 142 | G4double sigmaMinusLambdaConversionRate; |
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| 143 | G4double sigmaZeroLambdaConversionRate; |
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| 144 | |
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| 145 | }; |
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| 146 | |
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| 147 | #endif |
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| 148 | |
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