Gabriele Cosmo
108 lines
3.3 KiB
C++
108 lines
3.3 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: G4Generator2BS
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//
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// Author: Andreia Trindade (andreia@lip.pt)
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// Pedro Rodrigues (psilva@lip.pt)
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// Luis Peralta (luis@lip.pt)
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//
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// Creation date: 2 June 2003
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//
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// Modifications:
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// 02 Jun 2003 First implementation acording with new design
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// 12 Oct 2010 V.Ivanchenko moved RejectionFunction inline
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//
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//
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// Class Description:
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//
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// Concrete class for Bremsstrahlung Angular Distribution Generation
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// 2BS Distribution
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//
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// -------------------------------------------------------------------
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//
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#ifndef G4Generator2BS_h
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#define G4Generator2BS_h 1
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#include "G4ios.hh"
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#include "globals.hh"
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#include "G4VEmAngularDistribution.hh"
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#include "G4Log.hh"
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class G4Pow;
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class G4Generator2BS : public G4VEmAngularDistribution
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{
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public:
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explicit G4Generator2BS(const G4String& name="");
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virtual ~G4Generator2BS();
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G4ThreeVector& SampleDirection(const G4DynamicParticle* dp,
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G4double out_energy,
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G4int Z,
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const G4Material* mat = nullptr) override;
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void PrintGeneratorInformation() const override;
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G4Generator2BS & operator=(const G4Generator2BS &right)= delete;
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G4Generator2BS(const G4Generator2BS&) = delete;
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protected:
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inline G4double RejectionFunction(G4double value) const;
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private:
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G4Pow* g4pow;
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G4double fz;
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G4double ratio;
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G4double ratio1;
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G4double ratio2;
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G4double delta;
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G4int nwarn;
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};
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inline G4double G4Generator2BS::RejectionFunction(G4double y) const
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{
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G4double y2 = (1 + y)*(1 + y);
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G4double x = 4*y*ratio/y2;
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return 4*x - ratio1 - (ratio2 - x)*G4Log(delta + fz/y2);
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}
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#endif
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