Gabriele Cosmo
83 lines
3.0 KiB
C++
83 lines
3.0 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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//
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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: G4DeltaAngleFreeScat
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//
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// Author: Vladimir Ivantcheko
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//
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// Creation date: 23 August 2013
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//
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// Modifications:
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//
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// Class Description:
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//
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// Delta-electron Angular Distribution Generation
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//
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// Class Description: End
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//
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// -------------------------------------------------------------------
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//
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#include "G4DeltaAngleFreeScat.hh"
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#include "G4PhysicalConstants.hh"
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#include "Randomize.hh"
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using namespace std;
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G4DeltaAngleFreeScat::G4DeltaAngleFreeScat(const G4String&)
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: G4VEmAngularDistribution("deltaFree")
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{}
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G4DeltaAngleFreeScat::~G4DeltaAngleFreeScat() = default;
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G4ThreeVector&
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G4DeltaAngleFreeScat::SampleDirection(const G4DynamicParticle* dp,
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G4double kinEnergyFinal, G4int,
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const G4Material*)
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{
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G4double deltaMomentum =
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sqrt(kinEnergyFinal*(kinEnergyFinal + 2*electron_mass_c2));
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G4double costet = kinEnergyFinal*(dp->GetTotalEnergy() + electron_mass_c2) /
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(deltaMomentum * dp->GetTotalMomentum());
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G4double phi = G4UniformRand()*twopi;
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G4double sintet = sqrt((1 - costet)*(1 + costet));
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fLocalDirection.set(sintet*cos(phi), sintet*sin(phi), costet);
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fLocalDirection.rotateUz(dp->GetMomentumDirection());
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return fLocalDirection;
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}
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void G4DeltaAngleFreeScat::PrintGeneratorInformation() const
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{}
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