Gabriele Cosmo
160 lines
5.4 KiB
C++
160 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: G4hhIonisation.cc 85013 2014-10-23 09:45:07Z gcosmo $
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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: G4hhIonisation
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//
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// Author: Vladimir Ivanchenko
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//
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// Creation date: 30.09.2005
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//
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// Modifications:
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// 10-01-06 SetStepLimits -> SetStepFunction (V.Ivantchenko)
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// 27-10-06 Add maxKinEnergy (V.Ivantchenko)
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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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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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#include "G4hhIonisation.hh"
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#include "G4PhysicalConstants.hh"
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#include "G4SystemOfUnits.hh"
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#include "G4BraggNoDeltaModel.hh"
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#include "G4BetheBlochNoDeltaModel.hh"
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#include "G4ICRU73NoDeltaModel.hh"
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#include "G4UniversalFluctuation.hh"
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#include "G4BohrFluctuations.hh"
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#include "G4IonFluctuations.hh"
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#include "G4UnitsTable.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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G4hhIonisation::G4hhIonisation(const G4String& name)
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: G4VEnergyLossProcess(name),
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theParticle(0),
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theBaseParticle(0),
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isInitialised(false)
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{
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SetStepFunction(0.1, 0.1*mm);
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SetVerboseLevel(1);
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SetProcessSubType(fIonisation);
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SetSecondaryParticle(G4Electron::Electron());
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mass = 0.0;
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ratio = 0.0;
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flucModel = 0;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4hhIonisation::~G4hhIonisation()
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{}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4bool G4hhIonisation::IsApplicable(const G4ParticleDefinition& p)
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{
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return (p.GetPDGCharge() != 0.0 && p.GetPDGMass() > 100.0*MeV &&
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!p.IsShortLived());
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4double G4hhIonisation::MinPrimaryEnergy(const G4ParticleDefinition*,
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const G4Material*,
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G4double cut)
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{
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G4double x = 0.5*cut/electron_mass_c2;
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G4double y = electron_mass_c2/mass;
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G4double gam = x*y + std::sqrt((1. + x)*(1. + x*y*y));
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return mass*(gam - 1.0);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4hhIonisation::InitialiseEnergyLossProcess(
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const G4ParticleDefinition* part,
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const G4ParticleDefinition* bpart)
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{
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if(isInitialised) { return; }
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theParticle = part;
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if(bpart) {
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G4cout << "G4hhIonisation::InitialiseEnergyLossProcess WARNING: no "
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<< "base particle should be defined for the process "
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<< GetProcessName() << G4endl;
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}
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SetBaseParticle(0);
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mass = theParticle->GetPDGMass();
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ratio = electron_mass_c2/mass;
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G4double eth = 2*MeV*mass/proton_mass_c2;
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flucModel = new G4IonFluctuations();
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G4EmParameters* param = G4EmParameters::Instance();
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G4double emin = std::min(param->MinKinEnergy(), 0.1*eth);
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G4double emax = std::max(param->MaxKinEnergy(), 100*eth);
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SetMinKinEnergy(emin);
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SetMaxKinEnergy(emax);
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G4int bin = G4lrint(param->NumberOfBinsPerDecade()*std::log10(emax/emin));
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SetDEDXBinning(bin);
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G4VEmModel* em = 0;
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if(part->GetPDGCharge() > 0.0) { em = new G4BraggNoDeltaModel(); }
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else { em = new G4ICRU73NoDeltaModel(); }
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em->SetLowEnergyLimit(emin);
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em->SetHighEnergyLimit(eth);
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AddEmModel(1, em, flucModel);
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em = new G4BetheBlochNoDeltaModel();
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em->SetLowEnergyLimit(eth);
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em->SetHighEnergyLimit(emax);
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AddEmModel(1, em, flucModel);
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if(verboseLevel>1) {
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G4cout << "G4hhIonisation is initialised" << G4endl;
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}
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isInitialised = true;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4hhIonisation::PrintInfo()
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{
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G4cout << " Delta-ray will not be produced; "
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<< G4endl;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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