81 lines
2.4 KiB
C++
81 lines
2.4 KiB
C++
// Geant4 simulation for MuSR
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// AUTHOR: Toni SHIROKA, Paul Scherrer Institut, PSI
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// DATE : 2008-05
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//
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//$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
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// Muonium Formation according to yield.cc function (through GetYields method).
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// Id : lem4MuFormation.hh, v 1.4
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// Author: Taofiq PARAISO, T. Shiroka
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// Date : 2007-12
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//$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
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#ifndef lem4MuFormation_h
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#define lem4MuFormation_h 1
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#include "G4VDiscreteProcess.hh"
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#include "G4ParticleTable.hh"
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#include "yields.h"
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/*! lem4MuFormation class defines the muonium formation process in the Carbon foil
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* according to yields from Gonin's paper Sci. Rev. Instrum. 65(3), 648-652 (1994).
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* \image html yields3.gif The muonium formation yields.
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* The main parameters are the foil thickness and muon energy. For a given energy,
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* a corresponding proportion of the muons will be converted into Muonium.
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* Concretely, the muon is eliminated and replaced by a Muonium with identical
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* properties, including time, energy, momentum, position etc.
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*
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* The process is executed at the END of a step, i.e. the muon is converted into
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* Muonium AFTER flying through the Carbon foil (see also yields.h). */
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class lem4MuFormation : public G4VDiscreteProcess
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{
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public:
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lem4MuFormation(const G4String& name = "MuFormation", // process description
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G4ProcessType aType = fElectromagnetic);
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~lem4MuFormation();
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//! - Main method. Muonium formation process is executed at the END of a step. */
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G4VParticleChange* PostStepDoIt(
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const G4Track&,
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const G4Step&);
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G4double GetMeanFreePath(const G4Track& aTrack,
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G4double previousStepSize,
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G4ForceCondition* condition);
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//! Condition for process application (step Object).
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G4bool CheckCondition(const G4Step& aStep);
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//! Condition for process application (step Pointer).
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G4bool CheckCondition(const G4Step* aStep);
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G4String p_name;
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G4bool condition;
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void GetDatas( const G4Step* aStep);
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// model parameters
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G4ParticleTable* particleTable;
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G4ParticleDefinition* particle;
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Yields Gonin;
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G4double yvector[3];
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G4double rnd;
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G4DynamicParticle *DP;
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//! The particle change object.
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G4VParticleChange fParticleChange;
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void PrepareSecondary(const G4Track&);
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G4Track* aSecondary;
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void InitializeSecondaries(const G4Track&);
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};
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#endif
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