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25 //
26 //
27 // -------------------------------------------------------------------
28 //
29 // GEANT4 Class file
30 //
31 //
32 // File name: G4eIonisationSpectrum
33 //
34 // Author: V.Ivanchenko (Vladimir.Ivantchenko@cern.ch)
35 //
36 // Creation date: 27 September 2001
37 //
38 // Modifications:
39 // 10.10.01 MGP Revision to improve code quality and
40 // consistency with design
41 // 29.11.01 V.Ivanchenko Parametrisation is updated
42 // 30.05.02 VI Add inline functions
43 //
44 // -------------------------------------------------------------------
45
46 // Class Description:
47 // Provides various integration over delta-electron spectrum for e-
48 // ionisation process. Spectrum is parametrised accourding to
49 // EEDL database, details are described in the Physics Reference Manual
50 // Further documentation available from http://www.ge.infn.it/geant4/lowE
51
52 // -------------------------------------------------------------------
53
54 #ifndef G4EIONISATIONSPECTRUM_HH
55 #define G4EIONISATIONSPECTRUM_HH 1
56
57 #include "G4VEnergySpectrum.hh"
58 #include "G4eIonisationParameters.hh"
59
60 //class G4eIonisationParameters;
61 class G4DataVector;
62
63 class G4eIonisationSpectrum : public G4VEnergySpectrum
64 {
65
66 public:
67
68 G4eIonisationSpectrum();
69
70 ~G4eIonisationSpectrum();
71
72 G4double Probability(G4int Z, G4double tMin, G4double tMax,
73 G4double kineticEnergy, G4int shell,
74 const G4ParticleDefinition* pd=0) const;
75
76 G4double AverageEnergy(G4int Z, G4double tMin, G4double tMax,
77 G4double kineticEnergy, G4int shell,
78 const G4ParticleDefinition* pd=0) const;
79
80 G4double SampleEnergy(G4int Z, G4double tMin, G4double tMax,
81 G4double kineticEnergy, G4int shell,
82 const G4ParticleDefinition* pd=0) const;
83
84 G4double MaxEnergyOfSecondaries(G4double kineticEnergy,
85 G4int Z = 0,
86 const G4ParticleDefinition* pd=0) const;
87
88 G4double Excitation(G4int Z, G4double e) const;
89
90 void PrintData() const;
91
92 protected:
93
94 private:
95
96 G4double IntSpectrum(G4double xMin, G4double xMax,
97 const G4DataVector& p) const;
98
99 G4double AverageValue(G4double xMin, G4double xMax,
100 const G4DataVector& p) const;
101
102 G4double Function(G4double x, const G4DataVector& p) const;
103
104 // Hide copy constructor and assignment operator
105 G4eIonisationSpectrum(const G4eIonisationSpectrum&);
106 G4eIonisationSpectrum & operator = (const G4eIonisationSpectrum &right);
107
108 private:
109
110 G4eIonisationParameters* theParam;
111 G4double lowestE;
112 G4double factor;
113 G4int iMax;
114 G4int verbose;
115 };
116
117
118 inline G4double G4eIonisationSpectrum::Function(G4double x,
119 const G4DataVector& p) const
120 {
121 G4double f = 1.0 - p[0] - p[iMax]*x
122 + x*x*(1.0 - p[iMax] + (1.0/(1.0 - x) - p[iMax])/(1.0 - x))
123 + 0.5*p[0]/x;
124
125 return f;
126 }
127
128 inline G4double G4eIonisationSpectrum::Excitation(G4int Z, G4double e) const
129 {
130 return theParam->Excitation(Z, e);
131 }
132
133
134 #endif
135