include/Geant4/G4VDiscreteProcess.hh

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0025 //
0026 // G4VDiscreteProcess
0027 //
0028 // Class description:
0029 //
0030 // Abstract class which defines the public behavior of
0031 // discrete physics interactions.
0032
0033 // Authors:
0034 // - 2 December 1995, G.Cosmo - First implementation, based on object model
0035 // - 18 December 1996, H.Kurashige - New Physics scheme
0036 // --------------------------------------------------------------------
0037 #ifndef G4VDiscreteProcess_hh
0038 #define G4VDiscreteProcess_hh 1
0039
0040 #include "globals.hh"
0041 #include "G4ios.hh"
0042
0043 #include "G4VProcess.hh"
0044
0045 class G4VDiscreteProcess : public G4VProcess
0046 {
0047   public:
0048
0049     G4VDiscreteProcess(const G4String& aName,
0050                        G4ProcessType aType = fNotDefined );
0051     G4VDiscreteProcess(G4VDiscreteProcess&);
0052
0053     virtual ~G4VDiscreteProcess();
0054
0055     G4VDiscreteProcess& operator=(const G4VDiscreteProcess&) = delete;
0056
0057     virtual G4double PostStepGetPhysicalInteractionLength(
0058                              const G4Track& track,
0059                              G4double previousStepSize,
0060                              G4ForceCondition* condition
0061                             );
0062
0063     virtual G4VParticleChange* PostStepDoIt(
0064                              const G4Track& ,
0065                              const G4Step&
0066                             );
0067
0068     // No operation in AtRestDoIt and AlongStepDoIt
0069     //
0070     virtual G4double AlongStepGetPhysicalInteractionLength(
0071                              const G4Track&,
0072                              G4double  ,
0073                              G4double  ,
0074                              G4double& ,
0075                              G4GPILSelection*
0076                             ) { return -1.0; }
0077
0078     virtual G4double AtRestGetPhysicalInteractionLength(
0079                              const G4Track& ,
0080                              G4ForceCondition*
0081                             ) { return -1.0; }
0082
0083     // No operation in AtRestDoIt and AlongStepDoIt
0084     //
0085     virtual G4VParticleChange* AtRestDoIt(
0086                              const G4Track& ,
0087                              const G4Step&
0088                             ) { return nullptr; }
0089
0090     virtual G4VParticleChange* AlongStepDoIt(
0091                              const G4Track& ,
0092                              const G4Step&
0093                             ) { return nullptr; }
0094
0095     // cross section in the unit of inverse length as a
0096     // function of kinetic energy
0097     virtual G4double GetCrossSection(
0098                              const G4double,
0099                              const G4MaterialCutsCouple*
0100                             ) { return 0.0; }
0101
0102     // minimal energy for non-zero cross section
0103     virtual G4double MinPrimaryEnergy(
0104                              const G4ParticleDefinition*,
0105                              const G4Material*
0106                             ) { return 0.0; }
0107
0108   protected:
0109
0110     virtual G4double GetMeanFreePath( const G4Track& aTrack,
0111                                       G4double previousStepSize,
0112                                       G4ForceCondition* condition ) = 0;
0113       // Calculates from the macroscopic cross-section a mean
0114       // free path, the value is returned in units of distance
0115
0116   private:
0117
0118     G4VDiscreteProcess();
0119       // Hidden default constructor
0120 };
0121
0122 #endif