Gabriele Cosmo
135 lines
4.6 KiB
C++
135 lines
4.6 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// -------------------------------------------------------------------
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//
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// GEANT4 Class file
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//
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//
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// File name: G4eIonisationSpectrum
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//
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// Author: V.Ivanchenko (Vladimir.Ivantchenko@cern.ch)
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//
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// Creation date: 27 September 2001
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//
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// Modifications:
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// 10.10.01 MGP Revision to improve code quality and
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// consistency with design
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// 29.11.01 V.Ivanchenko Parametrisation is updated
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// 30.05.02 VI Add inline functions
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//
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// -------------------------------------------------------------------
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// Class Description:
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// Provides various integration over delta-electron spectrum for e-
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// ionisation process. Spectrum is parametrised accourding to
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// EEDL database, details are described in the Physics Reference Manual
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// Further documentation available from http://www.ge.infn.it/geant4/lowE
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// -------------------------------------------------------------------
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#ifndef G4EIONISATIONSPECTRUM_HH
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#define G4EIONISATIONSPECTRUM_HH 1
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#include "G4VEnergySpectrum.hh"
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#include "G4eIonisationParameters.hh"
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//class G4eIonisationParameters;
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class G4DataVector;
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class G4eIonisationSpectrum : public G4VEnergySpectrum
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{
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public:
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G4eIonisationSpectrum();
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~G4eIonisationSpectrum();
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G4double Probability(G4int Z, G4double tMin, G4double tMax,
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G4double kineticEnergy, G4int shell,
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const G4ParticleDefinition* pd=0) const;
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G4double AverageEnergy(G4int Z, G4double tMin, G4double tMax,
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G4double kineticEnergy, G4int shell,
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const G4ParticleDefinition* pd=0) const;
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G4double SampleEnergy(G4int Z, G4double tMin, G4double tMax,
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G4double kineticEnergy, G4int shell,
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const G4ParticleDefinition* pd=0) const;
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G4double MaxEnergyOfSecondaries(G4double kineticEnergy,
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G4int Z = 0,
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const G4ParticleDefinition* pd=0) const;
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G4double Excitation(G4int Z, G4double e) const;
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void PrintData() const;
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protected:
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private:
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G4double IntSpectrum(G4double xMin, G4double xMax,
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const G4DataVector& p) const;
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G4double AverageValue(G4double xMin, G4double xMax,
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const G4DataVector& p) const;
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G4double Function(G4double x, const G4DataVector& p) const;
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// Hide copy constructor and assignment operator
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G4eIonisationSpectrum(const G4eIonisationSpectrum&);
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G4eIonisationSpectrum & operator = (const G4eIonisationSpectrum &right);
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private:
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G4eIonisationParameters* theParam;
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G4double lowestE;
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G4double factor;
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G4int iMax;
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G4int verbose;
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};
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inline G4double G4eIonisationSpectrum::Function(G4double x,
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const G4DataVector& p) const
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{
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G4double f = 1.0 - p[0] - p[iMax]*x
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+ x*x*(1.0 - p[iMax] + (1.0/(1.0 - x) - p[iMax])/(1.0 - x))
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+ 0.5*p[0]/x;
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return f;
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}
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inline G4double G4eIonisationSpectrum::Excitation(G4int Z, G4double e) const
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{
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return theParam->Excitation(Z, e);
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}
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#endif
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