Gabriele Cosmo
214 lines
8.0 KiB
C++
214 lines
8.0 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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// $Id$
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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: G4hIonisation
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//
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// Author: Laszlo Urban
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//
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// Creation date: 30.05.1997
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//
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// Modifications:
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//
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// corrected by L.Urban on 24/09/97
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// several bugs corrected by L.Urban on 13/01/98
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// 07-04-98 remove 'tracking cut' of the ionizing particle, mma
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// 22-10-98 cleanup L.Urban
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// 02-02-99 bugs fixed , L.Urban
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// 29-07-99 correction in BuildLossTable for low energy, L.Urban
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// 10-02-00 modifications , new e.m. structure, L.Urban
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// 10-08-00 V.Ivanchenko change BuildLambdaTable, in order to
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// simulate energy losses of ions; correction to
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// cross section for particles with spin 1 is inserted as well
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// 28-05-01 V.Ivanchenko minor changes to provide ANSI -wall compilation
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// 10-08-01 new methods Store/Retrieve PhysicsTable (mma)
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// 14-08-01 new function ComputeRestrictedMeandEdx() + 'cleanup' (mma)
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// 29-08-01 PostStepDoIt: correction for spin 1/2 (instead of 1) (mma)
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// 17-09-01 migration of Materials to pure STL (mma)
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// 25-09-01 completion of RetrievePhysicsTable() (mma)
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// 29-10-01 all static functions no more inlined
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// 08-11-01 Charge renamed zparticle; added to the dedx
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// 27-03-02 Bug fix in scaling of lambda table (V.Ivanchenko)
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// 09-04-02 Update calculation of tables for GenericIons (V.Ivanchenko)
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// 30-04-02 V.Ivanchenko update to new design
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// 04-12-02 Add verbose level definition (VI)
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// 23-12-02 Change interface in order to move to cut per region (V.Ivanchenko)
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// 26-12-02 Secondary production moved to derived classes (V.Ivanchenko)
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// 13-02-03 SubCutoff regime is assigned to a region (V.Ivanchenko)
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// 23-05-03 Define default integral + BohrFluctuations (V.Ivanchenko)
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// 03-06-03 Fix initialisation problem for STD ionisation (V.Ivanchenko)
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// 04-08-03 Set integral=false to be default (V.Ivanchenko)
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// 08-08-03 STD substitute standard (V.Ivanchenko)
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// 12-11-03 G4EnergyLossSTD -> G4EnergyLossProcess (V.Ivanchenko)
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// 27-05-04 Set integral to be a default regime (V.Ivanchenko)
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// 08-11-04 Migration to new interface of Store/Retrieve tables (V.Ivantchenko)
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// 24-03-05 Optimize internal interfaces (V.Ivantchenko)
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// 12-08-05 SetStepLimits(0.2, 0.1*mm) (mma)
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// 10-01-06 SetStepLimits -> SetStepFunction (V.Ivanchenko)
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// 26-05-06 scale negative particles from pi- and pbar,
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// positive from pi+ and p (VI)
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// 14-01-07 use SetEmModel() and SetFluctModel() from G4VEnergyLossProcess (mma)
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// 12-09-08 Removed CorrectionsAlongStep (VI)
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// 27-05-10 Added G4ICRU73QOModel for anti-protons (VI)
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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 "G4hIonisation.hh"
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#include "G4PhysicalConstants.hh"
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#include "G4SystemOfUnits.hh"
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#include "G4Electron.hh"
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#include "G4Proton.hh"
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#include "G4AntiProton.hh"
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#include "G4BraggModel.hh"
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#include "G4BetheBlochModel.hh"
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#include "G4IonFluctuations.hh"
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#include "G4UniversalFluctuation.hh"
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#include "G4BohrFluctuations.hh"
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#include "G4UnitsTable.hh"
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#include "G4PionPlus.hh"
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#include "G4PionMinus.hh"
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#include "G4KaonPlus.hh"
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#include "G4KaonMinus.hh"
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#include "G4ICRU73QOModel.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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using namespace std;
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G4hIonisation::G4hIonisation(const G4String& name)
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: G4VEnergyLossProcess(name),
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isInitialised(false)
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{
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SetStepFunction(0.2, 0.1*mm);
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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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eth = 2*MeV;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4hIonisation::~G4hIonisation()
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{}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4bool G4hIonisation::IsApplicable(const G4ParticleDefinition& p)
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{
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return (p.GetPDGCharge() != 0.0 && p.GetPDGMass() > 10.0*MeV &&
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!p.IsShortLived());
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4double G4hIonisation::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 gam = x*ratio + std::sqrt((1. + x)*(1. + x*ratio*ratio));
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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 G4hIonisation::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) {
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const G4ParticleDefinition* theBaseParticle = 0;
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G4String pname = part->GetParticleName();
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G4double q = part->GetPDGCharge();
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// standard base particles
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if(part == bpart || pname == "proton" ||
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pname == "anti_proton" ||
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pname == "pi+" || pname == "pi-" ||
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pname == "kaon+" || pname == "kaon-")
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{
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theBaseParticle = 0;
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}
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// select base particle
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else if(bpart == 0) {
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if(part->GetPDGSpin() == 0.0) {
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if(q > 0.0) { theBaseParticle = G4KaonPlus::KaonPlus(); }
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else { theBaseParticle = G4KaonMinus::KaonMinus(); }
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} else {
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if(q > 0.0) { theBaseParticle = G4Proton::Proton(); }
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else { theBaseParticle = G4AntiProton::AntiProton(); }
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}
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// base particle defined by interface
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} else {
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theBaseParticle = bpart;
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}
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SetBaseParticle(theBaseParticle);
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mass = part->GetPDGMass();
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ratio = electron_mass_c2/mass;
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eth = 2.0*MeV*mass/proton_mass_c2;
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if (!EmModel(1)) {
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if(q > 0.0) { SetEmModel(new G4BraggModel(),1); }
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else { SetEmModel(new G4ICRU73QOModel(),1); }
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}
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EmModel(1)->SetLowEnergyLimit(MinKinEnergy());
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// model limit defined for protons
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//eth = (EmModel(1)->HighEnergyLimit())*mass/proton_mass_c2;
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EmModel(1)->SetHighEnergyLimit(eth);
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AddEmModel(1, EmModel(1), new G4IonFluctuations());
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if (!FluctModel()) { SetFluctModel(new G4UniversalFluctuation()); }
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if (!EmModel(2)) { SetEmModel(new G4BetheBlochModel(),2); }
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EmModel(2)->SetLowEnergyLimit(eth);
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EmModel(2)->SetHighEnergyLimit(MaxKinEnergy());
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AddEmModel(2, EmModel(2), FluctModel());
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isInitialised = true;
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4hIonisation::PrintInfo()
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{}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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