Gabriele Cosmo
112 lines
5.0 KiB
C++
112 lines
5.0 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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// $Id: G4LowEnergyPolarizedRayleigh.hh,v 1.5 2006/06/29 19:36:07 gunter Exp $
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// GEANT4 tag $Name: geant4-09-01 $
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//
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// --------------------------------------------------------------
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//
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// File name: G4LowEnergyPolarizedRayleigh.hh
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//
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// Author: Capra Riccardo
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//
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// Creation date: May 2005
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//
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// History:
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// -----------
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// 02 May 2005 R. Capra 1st implementation
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//
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//----------------------------------------------------------------
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#ifndef G4LowEnergyPolarizedRayleigh_hh
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#define G4LowEnergyPolarizedRayleigh_hh
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#include "G4VLowEnergyDiscretePhotonProcess.hh"
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// G4LowEnergyPolarizedRayleigh
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// The class implements the polarized Rayleigh process
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//
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// Specialization of G4VLowEnergyDiscretePhotonProcess class.
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// This is a preliminary implementation of the Rayleigh polarized process.
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// Reference articles are:
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//
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// Rayleigh process: The Quantum Theory of Radiation
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// W. Heitler, Oxford at the Clarendon Press, Oxford (1954)
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// Scattering function: A simple model of photon transport
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// D.E. Cullen, Nucl. Instr. Meth. in Phys. Res. B 101 (1995) 499-510
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// Polarization of the outcoming photon: Beam test of a prototype detector array for the PoGO astronomical hard X-ray/soft gamma-ray polarimeter
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// T. Mizuno et al., Nucl. Instr. Meth. in Phys. Res. A 540 (2005) 158-168
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//
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class G4LowEnergyPolarizedRayleigh : public G4VLowEnergyDiscretePhotonProcess
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{
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public:
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// Class constructor
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// processName The name of the process
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G4LowEnergyPolarizedRayleigh(const G4String &processName = "polarLowEnRayleigh");
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// Class destructor
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inline virtual ~G4LowEnergyPolarizedRayleigh(void) {}
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// Calculates the new photon direction and polarization
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//
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// In the code the following definitions are used
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// aTrack The track
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// aStep The step
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// The proposed changes for the photon
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virtual G4VParticleChange* PostStepDoIt(const G4Track& aTrack, const G4Step& aStep);
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private:
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// Hides copy constructor
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G4LowEnergyPolarizedRayleigh(const G4LowEnergyPolarizedRayleigh&);
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// Hides assignment operator
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G4LowEnergyPolarizedRayleigh & operator=(const G4LowEnergyPolarizedRayleigh&);
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// Generates \f$cos \left ( \theta\right )\f$ of the scattered photon
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// incomingPhotonEnergy The energy of the incoming photon
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// zAtom Atomic number
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// \f$cos \left ( \theta\right )\f$
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G4double GenerateCosTheta(G4double incomingPhotonEnergy, G4int zAtom) const;
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// Generates \f$\phi\f$ of the scattered photon
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// cosTheta \f$cos \left ( \theta\right )\f$ of the scattered photon
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// \f$\phi\f$
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G4double GeneratePhi(G4double cosTheta) const;
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// Generates the polarization direction \f$\beta\f$ in the plane x, y relative to the x direction
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// \f$\beta\f$
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G4double GeneratePolarizationAngle(void) const;
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// Lower energy limit due to the available data in the physics tables
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G4double intrinsicLowEnergyLimit;
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// Higher energy limit due to the available data in the physics tables
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G4double intrinsicHighEnergyLimit;
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};
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#endif /* G4LowEnergyPolarizedRayleigh_hh */
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