| 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 | // $Id: G4eIonisationSpectrum.hh,v 1.7 2006/06/29 19:37:40 gunter Exp $
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| 27 | // GEANT4 tag $Name: geant4-09-03-cand-01 $
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| 28 | //
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| 29 | // -------------------------------------------------------------------
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| 30 | //
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| 31 | // GEANT4 Class file
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| 32 | //
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| 33 | //
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| 34 | // File name: G4eIonisationSpectrum
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| 35 | //
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| 36 | // Author: V.Ivanchenko (Vladimir.Ivantchenko@cern.ch)
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| 37 | //
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| 38 | // Creation date: 27 September 2001
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| 39 | //
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| 40 | // Modifications:
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| 41 | // 10.10.01 MGP Revision to improve code quality and
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| 42 | // consistency with design
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| 43 | // 29.11.01 V.Ivanchenko Parametrisation is updated
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| 44 | // 30.05.02 VI Add inline functions
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| 45 | //
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| 46 | // -------------------------------------------------------------------
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| 47 |
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| 48 | // Class Description:
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| 49 | // Provides various integration over delta-electron spectrum for e-
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| 50 | // ionisation process. Spectrum is parametrised accourding to
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| 51 | // EEDL database, details are described in the Physics Reference Manual
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| 52 | // Further documentation available from http://www.ge.infn.it/geant4/lowE
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| 53 |
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| 54 | // -------------------------------------------------------------------
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| 55 |
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| 56 | #ifndef G4EIONISATIONSPECTRUM_HH
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| 57 | #define G4EIONISATIONSPECTRUM_HH 1
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| 58 |
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| 59 | #include "G4VEnergySpectrum.hh"
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| 60 | #include "G4eIonisationParameters.hh"
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| 61 |
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| 62 | //class G4eIonisationParameters;
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| 63 | class G4DataVector;
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| 64 |
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| 65 | class G4eIonisationSpectrum : public G4VEnergySpectrum
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| 66 | {
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| 67 |
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| 68 | public:
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| 69 |
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| 70 | G4eIonisationSpectrum();
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| 71 |
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| 72 | ~G4eIonisationSpectrum();
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| 73 |
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| 74 | G4double Probability(G4int Z, G4double tMin, G4double tMax,
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| 75 | G4double kineticEnergy, G4int shell,
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| 76 | const G4ParticleDefinition* pd=0) const;
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| 77 |
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| 78 | G4double AverageEnergy(G4int Z, G4double tMin, G4double tMax,
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| 79 | G4double kineticEnergy, G4int shell,
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| 80 | const G4ParticleDefinition* pd=0) const;
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| 81 |
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| 82 | G4double SampleEnergy(G4int Z, G4double tMin, G4double tMax,
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| 83 | G4double kineticEnergy, G4int shell,
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| 84 | const G4ParticleDefinition* pd=0) const;
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| 85 |
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| 86 | G4double MaxEnergyOfSecondaries(G4double kineticEnergy,
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| 87 | G4int Z = 0,
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| 88 | const G4ParticleDefinition* pd=0) const;
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| 89 |
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| 90 | G4double Excitation(G4int Z, G4double e) const;
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| 91 |
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| 92 | void PrintData() const;
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| 93 |
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| 94 | protected:
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| 95 |
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| 96 | private:
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| 97 |
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| 98 | G4double IntSpectrum(G4double xMin, G4double xMax,
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| 99 | const G4DataVector& p) const;
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| 100 |
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| 101 | G4double AverageValue(G4double xMin, G4double xMax,
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| 102 | const G4DataVector& p) const;
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| 103 |
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| 104 | G4double Function(G4double x, const G4DataVector& p) const;
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| 105 |
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| 106 | // Hide copy constructor and assignment operator
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| 107 | G4eIonisationSpectrum(const G4eIonisationSpectrum&);
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| 108 | G4eIonisationSpectrum & operator = (const G4eIonisationSpectrum &right);
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| 109 |
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| 110 | private:
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| 111 |
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| 112 | G4eIonisationParameters* theParam;
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| 113 | G4double lowestE;
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| 114 | G4double factor;
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| 115 | G4int iMax;
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| 116 | G4int verbose;
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| 117 | };
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| 118 |
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| 119 |
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| 120 | inline G4double G4eIonisationSpectrum::Function(G4double x,
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| 121 | const G4DataVector& p) const
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| 122 | {
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| 123 | G4double f = 1.0 - p[0] - p[iMax]*x
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| 124 | + x*x*(1.0 - p[iMax] + (1.0/(1.0 - x) - p[iMax])/(1.0 - x))
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| 125 | + 0.5*p[0]/x;
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| 126 |
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| 127 | return f;
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| 128 | }
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| 129 |
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| 130 | inline G4double G4eIonisationSpectrum::Excitation(G4int Z, G4double e) const
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| 131 | {
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| 132 | return theParam->Excitation(Z, e);
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| 133 | }
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| 134 |
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| 135 |
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| 136 | #endif
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