include/Geant4/G4eIonisationSpectrum.hh

0001 //
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0025 //
0026 //
0027 // -------------------------------------------------------------------
0028 //
0029 // GEANT4 Class file
0030 //
0031 //
0032 // File name:     G4eIonisationSpectrum
0033 //
0034 // Author:        V.Ivanchenko (Vladimir.Ivantchenko@cern.ch)
0035 //
0036 // Creation date: 27 September 2001
0037 //
0038 // Modifications:
0039 // 10.10.01 MGP             Revision to improve code quality and
0040 //                          consistency with design
0041 // 29.11.01  V.Ivanchenko   Parametrisation is updated
0042 // 30.05.02  VI             Add inline functions
0043 //
0044 // -------------------------------------------------------------------
0045
0046 // Class Description:
0047 // Provides various integration over delta-electron spectrum for e-
0048 // ionisation process. Spectrum is parametrised accourding to
0049 // EEDL database, details are described in the Physics Reference Manual
0050 // Further documentation available from http://www.ge.infn.it/geant4/lowE
0051
0052 // -------------------------------------------------------------------
0053
0054 #ifndef G4EIONISATIONSPECTRUM_HH
0055 #define G4EIONISATIONSPECTRUM_HH 1
0056
0057 #include "G4VEnergySpectrum.hh"
0058 #include "G4eIonisationParameters.hh"
0059
0060 //class G4eIonisationParameters;
0061 class G4DataVector;
0062
0063 class G4eIonisationSpectrum : public G4VEnergySpectrum
0064 {
0065
0066 public:
0067
0068   G4eIonisationSpectrum();
0069
0070   ~G4eIonisationSpectrum();
0071
0072   G4double Probability(G4int Z, G4double tMin, G4double tMax,
0073                G4double kineticEnergy, G4int shell,
0074                const G4ParticleDefinition* pd=0) const;
0075
0076   G4double AverageEnergy(G4int Z, G4double tMin, G4double tMax,
0077              G4double kineticEnergy, G4int shell,
0078              const G4ParticleDefinition* pd=0) const;
0079
0080   G4double SampleEnergy(G4int Z, G4double tMin, G4double tMax,
0081             G4double kineticEnergy, G4int shell,
0082             const G4ParticleDefinition* pd=0) const;
0083
0084   G4double MaxEnergyOfSecondaries(G4double kineticEnergy,
0085                                   G4int Z = 0,
0086                   const G4ParticleDefinition* pd=0) const;
0087
0088   G4double Excitation(G4int Z, G4double e) const;
0089
0090   void PrintData() const;
0091
0092 protected:
0093
0094 private:
0095
0096   G4double IntSpectrum(G4double xMin, G4double xMax,
0097                          const G4DataVector& p) const;
0098
0099   G4double AverageValue(G4double xMin, G4double xMax,
0100             const G4DataVector& p) const;
0101
0102   G4double Function(G4double x, const G4DataVector& p) const;
0103
0104   // Hide copy constructor and assignment operator
0105   G4eIonisationSpectrum(const  G4eIonisationSpectrum&);
0106   G4eIonisationSpectrum & operator = (const G4eIonisationSpectrum &right);
0107
0108 private:
0109
0110   G4eIonisationParameters* theParam;
0111   G4double                 lowestE;
0112   G4double                 factor;
0113   G4int                    iMax;
0114   G4int                    verbose;
0115 };
0116
0117
0118 inline G4double G4eIonisationSpectrum::Function(G4double x,
0119                           const G4DataVector& p) const
0120 {
0121   G4double f = 1.0 - p[0] - p[iMax]*x
0122              + x*x*(1.0 - p[iMax] + (1.0/(1.0 - x) - p[iMax])/(1.0 - x))
0123              + 0.5*p[0]/x;
0124
0125   return f;
0126 }
0127
0128 inline G4double G4eIonisationSpectrum::Excitation(G4int Z, G4double e) const
0129 {
0130   return theParam->Excitation(Z, e);
0131 }
0132
0133
0134 #endif