Gabriele Cosmo
140 lines
4.8 KiB
C++
140 lines
4.8 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: G4ePairProduction
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//
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// Author: Vladimir Ivanchenko
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//
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// Creation date: 17.03.2016
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//
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// Modifications:
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//
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// -------------------------------------------------------------------
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//
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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#include "G4ePairProduction.hh"
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#include "G4SystemOfUnits.hh"
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#include "G4Electron.hh"
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#include "G4Positron.hh"
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#include "G4VEmModel.hh"
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#include "G4VEmFluctuationModel.hh"
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#include "G4MuPairProductionModel.hh"
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#include "G4ElementData.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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G4ePairProduction::G4ePairProduction(const G4String& name)
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: G4VEnergyLossProcess(name),
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theParticle(nullptr),
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lowestKinEnergy(100.*MeV),
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isInitialised(false)
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{
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SetProcessSubType(fPairProdByCharged);
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SetSecondaryParticle(G4Positron::Positron());
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SetIonisation(false);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4bool G4ePairProduction::IsApplicable(const G4ParticleDefinition& p)
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{
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return (G4Electron::Electron() == &p || G4Positron::Positron() == &p);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4double G4ePairProduction::MinPrimaryEnergy(const G4ParticleDefinition*,
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const G4Material*,
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G4double)
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{
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return lowestKinEnergy;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4ePairProduction::InitialiseEnergyLossProcess(
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const G4ParticleDefinition* part,
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const G4ParticleDefinition*)
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{
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if (!isInitialised) {
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isInitialised = true;
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theParticle = part;
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G4MuPairProductionModel* mod = new G4MuPairProductionModel(part, "ePairProd");
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SetEmModel(mod);
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lowestKinEnergy = std::max(lowestKinEnergy, part->GetPDGMass()*8.0);
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mod->SetLowestKineticEnergy(lowestKinEnergy);
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G4VEmFluctuationModel* fm = nullptr;
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G4EmParameters* param = G4EmParameters::Instance();
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mod->SetLowEnergyLimit(param->MinKinEnergy());
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mod->SetHighEnergyLimit(param->MaxKinEnergy());
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AddEmModel(1, mod, fm);
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4ePairProduction::StreamProcessInfo(std::ostream& out) const
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{
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G4ElementData* ed = EmModel(0)->GetElementData();
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if(ed) {
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for(G4int Z=1; Z<93; ++Z) {
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G4Physics2DVector* pv = ed->GetElement2DData(Z);
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if(pv) {
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out << " Sampling table " << pv->GetLengthY()
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<< "x" << pv->GetLengthX() << "; from "
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<< G4Exp(pv->GetY(0))/GeV << " GeV to "
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<< G4Exp(pv->GetY(pv->GetLengthY()-1))/TeV
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<< " TeV " << G4endl;
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break;
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}
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}
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4ePairProduction::ProcessDescription(std::ostream& out) const
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{
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out << " Pair production";
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G4VEnergyLossProcess::ProcessDescription(out);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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