Gabriele Cosmo
126 lines
5.4 KiB
C++
126 lines
5.4 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: G4ComptonScattering.cc 107058 2017-11-01 14:54:12Z gcosmo $
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//
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//
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//------------ G4ComptonScattering physics process -----------------------------
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// by Michel Maire, April 1996
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//
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// 28-05-96, DoIt() small change in ElecDirection, by M.Maire
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// 10-06-96, simplification in ComputeMicroscopicCrossSection(), by M.Maire
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// 21-06-96, SetCuts implementation, M.Maire
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// 13-09-96, small changes in DoIt for better efficiency. Thanks to P.Urban
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// 06-01-97, crossection table + meanfreepath table, M.Maire
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// 05-03-97, new Physics scheme, M.Maire
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// 28-03-97, protection in BuildPhysicsTable, M.Maire
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// 07-04-98, remove 'tracking cut' of the scattered gamma, MMa
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// 04-06-98, in DoIt, secondary production condition:
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// range>std::min(threshold,safety)
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// 13-08-98, new methods SetBining() PrintInfo()
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// 15-12-98, cross section=0 below 10 keV
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// 28-05-01, V.Ivanchenko minor changes to provide ANSI -wall compilation
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// 13-07-01, DoIt: suppression of production cut for the electron (mma)
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// 03-08-01, new methods Store/Retrieve PhysicsTable (mma)
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// 06-08-01, BuildThePhysicsTable() called from constructor (mma)
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// 17-09-01, migration of Materials to pure STL (mma)
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// 20-09-01, DoIt: fminimalEnergy = 1*eV (mma)
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// 01-10-01, come back to BuildPhysicsTable(const G4ParticleDefinition&)
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// 17-04-02, LowestEnergyLimit = 1*keV
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// 26-05-04, cross section parametrization improved for low energy :
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// Egamma <~ 15 keV (Laszlo)
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// 08-11-04, Remove Store/Retrieve tables (V.Ivanchenko)
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// 09-03-05 Migrate to model interface
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// and inherit from G4VEmProcess (V.Ivanchenko)
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// 04-05-05, Make class to be default (V.Ivanchenko)
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// 09-09-06, modify SetModel(G4VEmModel*) (mma)
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// 12-09-06, move SetModel(G4VEmModel*) in G4VEmProcess (mma)
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//
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// -----------------------------------------------------------------------------
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#include "G4ComptonScattering.hh"
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#include "G4SystemOfUnits.hh"
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#include "G4KleinNishinaModel.hh"
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#include "G4KleinNishinaCompton.hh"
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#include "G4Electron.hh"
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#include "G4EmParameters.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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using namespace std;
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G4ComptonScattering::G4ComptonScattering(const G4String& processName,
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G4ProcessType type):G4VEmProcess (processName, type),
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isInitialised(false)
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{
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SetStartFromNullFlag(true);
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SetBuildTableFlag(true);
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SetSecondaryParticle(G4Electron::Electron());
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SetProcessSubType(fComptonScattering);
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SetMinKinEnergyPrim(1*MeV);
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SetSplineFlag(true);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4ComptonScattering::~G4ComptonScattering()
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{}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4bool G4ComptonScattering::IsApplicable(const G4ParticleDefinition& p)
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{
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return (&p == G4Gamma::Gamma());
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4ComptonScattering::InitialiseProcess(const G4ParticleDefinition*)
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{
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if(!isInitialised) {
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isInitialised = true;
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if(!EmModel(0)) { SetEmModel(new G4KleinNishinaCompton()); }
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G4EmParameters* param = G4EmParameters::Instance();
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EmModel(0)->SetLowEnergyLimit(param->MinKinEnergy());
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EmModel(0)->SetHighEnergyLimit(param->MaxKinEnergy());
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AddEmModel(1, EmModel(0));
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void G4ComptonScattering::PrintInfo()
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{}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void G4ComptonScattering::ProcessDescription(std::ostream& out) const
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{
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out << "<strong>Compton scattering</strong>";
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G4VEmProcess::ProcessDescription(out);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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