Gabriele Cosmo
225 lines
7.2 KiB
C++
225 lines
7.2 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: G4eeToHadronsMultiModel
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//
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// Author: Vladimir Ivanchenko
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//
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// Creation date: 02.08.2004
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//
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// Modifications:
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// 08-11-04 Migration to new interface of Store/Retrieve tables (V.Ivantchenko)
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// 08-04-05 Major optimisation of internal interfaces (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 "G4eeToHadronsMultiModel.hh"
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#include "G4PhysicalConstants.hh"
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#include "G4SystemOfUnits.hh"
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#include "G4eeToTwoPiModel.hh"
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#include "G4eeTo3PiModel.hh"
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#include "G4eeToPGammaModel.hh"
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#include "G4ee2KNeutralModel.hh"
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#include "G4ee2KChargedModel.hh"
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#include "G4eeCrossSections.hh"
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#include "G4Vee2hadrons.hh"
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#include "G4Positron.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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using namespace std;
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G4eeToHadronsMultiModel::G4eeToHadronsMultiModel(G4int ver,
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const G4String& mname) : G4VEmModel(mname),
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csFactor(1.0),
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nModels(0),
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verbose(ver),
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isInitialised(false)
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{
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thKineticEnergy = DBL_MAX;
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maxKineticEnergy = 4.521*GeV; //crresponding to 10TeV in lab
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fParticleChange = nullptr;
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cross = nullptr;
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delta = 1.0*MeV; //for bin width
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4eeToHadronsMultiModel::~G4eeToHadronsMultiModel()
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{
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delete cross;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4eeToHadronsMultiModel::Initialise(const G4ParticleDefinition*,
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const G4DataVector& cuts)
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{
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if(!isInitialised) {
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isInitialised = true;
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//G4cout<<"###Initialise in HadronMultiModel###"<<G4endl;
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cross = new G4eeCrossSections();
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G4eeToTwoPiModel* m2pi =
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new G4eeToTwoPiModel(cross,maxKineticEnergy,delta);
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AddEEModel(m2pi,cuts);
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G4eeTo3PiModel* m3pi =
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new G4eeTo3PiModel(cross,maxKineticEnergy,delta);
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AddEEModel(m3pi,cuts);
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G4ee2KChargedModel* m2kc =
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new G4ee2KChargedModel(cross,maxKineticEnergy,delta);
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AddEEModel(m2kc,cuts);
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G4ee2KNeutralModel* m2kn =
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new G4ee2KNeutralModel(cross,maxKineticEnergy,delta);
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AddEEModel(m2kn,cuts);
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G4eeToPGammaModel* mpg1 =
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new G4eeToPGammaModel(cross,"pi0",maxKineticEnergy,delta);
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AddEEModel(mpg1,cuts);
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G4eeToPGammaModel* mpg2 =
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new G4eeToPGammaModel(cross,"eta",maxKineticEnergy,delta);
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AddEEModel(mpg2,cuts);
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nModels = models.size();
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fParticleChange = GetParticleChangeForGamma();
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4eeToHadronsMultiModel::AddEEModel(G4Vee2hadrons* mod,
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const G4DataVector& cuts)
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{
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G4eeToHadronsModel* model = new G4eeToHadronsModel(mod, verbose);
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models.push_back(model);
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G4double elow = mod->LowEnergy();
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ekinMin.push_back(elow);
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if(thKineticEnergy > elow) { thKineticEnergy = elow; }
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ekinMax.push_back(mod->HighEnergy());
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ekinPeak.push_back(mod->PeakEnergy());
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cumSum.push_back(0.0);
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const G4ParticleDefinition* positron = G4Positron::Positron();
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model->Initialise(positron,cuts);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4double G4eeToHadronsMultiModel::CrossSectionPerVolume(
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const G4Material* mat,
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const G4ParticleDefinition* p,
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G4double kineticEnergy,
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G4double, G4double)
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{
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return mat->GetElectronDensity()*
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ComputeCrossSectionPerElectron(p, kineticEnergy);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4double G4eeToHadronsMultiModel::ComputeCrossSectionPerAtom(
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const G4ParticleDefinition* p,
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G4double kineticEnergy,
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G4double Z, G4double,
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G4double, G4double)
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{
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return Z*ComputeCrossSectionPerElectron(p, kineticEnergy);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4eeToHadronsMultiModel::SampleSecondaries(
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std::vector<G4DynamicParticle*>* newp,
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const G4MaterialCutsCouple* couple,
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const G4DynamicParticle* dp,
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G4double, G4double)
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{
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G4double kinEnergy = dp->GetKineticEnergy();
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G4double energy = LabToCM(kinEnergy);
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if (energy > thKineticEnergy) {
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G4double q = cumSum[nModels-1]*G4UniformRand();
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for(G4int i=0; i<nModels; i++) {
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if(q <= cumSum[i]) {
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(models[i])->SampleSecondaries(newp, couple,dp);
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if(newp->size() > 0) {
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fParticleChange->ProposeTrackStatus(fStopAndKill);
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}
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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 G4eeToHadronsMultiModel::ModelDescription(std::ostream& outFile) const
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{
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if(verbose > 0) {
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G4double e1 = 0.5*thKineticEnergy*thKineticEnergy/electron_mass_c2
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- 2.0*electron_mass_c2;
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G4double e2 = 0.5*maxKineticEnergy*maxKineticEnergy/electron_mass_c2
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- 2.0*electron_mass_c2;
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outFile << " e+ annihilation into hadrons active from "
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<< e1/GeV << " GeV to " << e2/GeV << " GeV" << G4endl;
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4eeToHadronsMultiModel::SetCrossSecFactor(G4double fac)
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{
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if(fac > 1.0) {
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csFactor = fac;
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if(verbose > 0) {
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G4cout << "### G4eeToHadronsMultiModel: The cross section for "
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<< "G4eeToHadronsMultiModel is increased by "
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<< csFactor << " times" << G4endl;
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}
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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