Gabriele Cosmo
266 lines
9.8 KiB
C++
266 lines
9.8 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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// Author: Luciano Pandola
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//
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// History:
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// --------
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// 14 Mar 2012 L Pandola First complete implementation for e-
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//
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//
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//! NOTICE: working only for e- at the moment (no interface available for
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//! e+)
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//
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#include "G4PenelopeOscillatorManager.hh"
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#include "G4SystemOfUnits.hh"
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#include "G4PenelopeIonisationCrossSection.hh"
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#include "G4PenelopeIonisationXSHandler.hh"
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#include "G4PenelopeCrossSection.hh"
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#include "G4Electron.hh"
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#include "G4AtomicTransitionManager.hh"
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G4PenelopeIonisationCrossSection::G4PenelopeIonisationCrossSection() :
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G4VhShellCrossSection("Penelope"),fShellIDTable(nullptr),
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fCrossSectionHandler(nullptr)
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{
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fOscManager = G4PenelopeOscillatorManager::GetOscillatorManager();
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fNMaxLevels = 9;
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// Verbosity scale:
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// 0 = nothing
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// 1 = calculation of cross sections, file openings, sampling of atoms
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// 2 = entering in methods
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fVerboseLevel = 0;
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fLowEnergyLimit = 10.0*eV;
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fHighEnergyLimit = 100.0*GeV;
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fTransitionManager = G4AtomicTransitionManager::Instance();
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4PenelopeIonisationCrossSection::~G4PenelopeIonisationCrossSection()
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{
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if (fCrossSectionHandler)
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delete fCrossSectionHandler;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4double G4PenelopeIonisationCrossSection::CrossSection(G4int Z,
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G4AtomicShellEnumerator shell,
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G4double incidentEnergy,
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G4double ,
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const G4Material* material)
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{
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if (fVerboseLevel > 1)
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G4cout << "Entering in method G4PenelopeIonisationCrossSection::CrossSection()" << G4endl;
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G4double cross = 0.;
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//Material pointer is not available
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if (!material)
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{
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//CRASH!
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G4ExceptionDescription ed;
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ed << "The method has been called with a null G4Material pointer" << G4endl;
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G4Exception("G4PenelopeIonisationCrossSection::CrossSection()","em2042",
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FatalException,ed);
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return cross;
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}
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if (!fCrossSectionHandler)
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fCrossSectionHandler = new G4PenelopeIonisationXSHandler();
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fCrossSectionHandler->BuildXSTable(material,0.,G4Electron::Electron());
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G4int nmax = std::min(fNMaxLevels,fTransitionManager->NumberOfShells(Z));
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if(G4int(shell) < nmax &&
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incidentEnergy >= fLowEnergyLimit && incidentEnergy <= fHighEnergyLimit)
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{
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//The shells in Penelope are organized per *material*, rather than per
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//element, so given a material one has to find the proper index for the
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//given Z and fShellID. An appropriate lookup table is used to avoid
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//recalculation.
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G4int index = FindShellIDIndex(material,Z,shell);
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//Index is not available!
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if (index < 0)
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return cross;
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const G4PenelopeCrossSection* theXS =
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fCrossSectionHandler->GetCrossSectionTableForCouple(G4Electron::Electron(),
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material,
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0.);
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//Cross check that everything is fine:
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G4PenelopeOscillator* theOsc = fOscManager->GetOscillatorIonisation(material,index);
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if (theOsc->GetParentZ() != Z || theOsc->GetShellFlag()-1 != G4int(shell))
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{
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//something went wrong!
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G4ExceptionDescription ed;
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ed << "There is something wrong here: it looks like the index is wrong" << G4endl;
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ed << "Requested: shell " << G4int(shell) << " and Z = " << Z << G4endl;
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ed << "Retrieved: " << theOsc->GetShellFlag()-1 << " and Z = " << theOsc->GetParentZ() << G4endl;
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G4Exception("G4PenelopeIonisationCrossSection::CrossSection()","em2043",
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JustWarning,ed);
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return cross;
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}
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G4double crossPerMolecule = (theXS) ? theXS->GetShellCrossSection(index,incidentEnergy) : 0.;
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//Now it must be converted in cross section per atom. I need the number of
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//atoms of the given Z per molecule.
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G4double atomsPerMolec = fOscManager->GetNumberOfZAtomsPerMolecule(material,Z);
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if (atomsPerMolec)
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cross = crossPerMolecule/atomsPerMolec;
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if (fVerboseLevel > 0)
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{
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G4cout << "Cross section of shell " << G4int(shell) << " and Z= " << Z;
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G4cout << " of material: " << material->GetName() << " and energy = " << incidentEnergy/keV << " keV" << G4endl;
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G4cout << "--> " << cross/barn << " barn" << G4endl;
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G4cout << "Shell binding energy: " << theOsc->GetIonisationEnergy()/eV << " eV;" ;
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G4cout << " resonance energy: " << theOsc->GetResonanceEnergy()/eV << "eV" << G4endl;
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if (fVerboseLevel > 2)
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{
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G4cout << "Cross section per molecule: " << crossPerMolecule/barn << " barn" << G4endl;
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G4cout << "Atoms " << Z << " per molecule: " << atomsPerMolec << G4endl;
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}
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}
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}
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return cross;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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std::vector<G4double>
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G4PenelopeIonisationCrossSection::GetCrossSection(G4int Z,
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G4double kinEnergy,
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G4double, G4double,
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const G4Material* mat)
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{
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G4int nmax = std::min(fNMaxLevels,fTransitionManager->NumberOfShells(Z));
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std::vector<G4double> vec(nmax,0.0);
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for(G4int i=0; i<nmax; ++i) {
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vec[i] = CrossSection(Z, G4AtomicShellEnumerator(i), kinEnergy,0.,mat);
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}
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return vec;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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std::vector<G4double>
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G4PenelopeIonisationCrossSection::Probabilities(G4int Z,
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G4double kinEnergy,
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G4double,
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G4double,
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const G4Material* mat)
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{
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std::vector<G4double> vec = GetCrossSection(Z, kinEnergy,0,0,mat);
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size_t n = vec.size();
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size_t i=0;
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G4double sum = 0.0;
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for(i=0; i<n; ++i) { sum += vec[i]; }
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if(sum > 0.0) {
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sum = 1.0/sum;
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for(i=0; i<n; ++i) { vec[i] = vec[i]*sum; }
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}
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return vec;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4int G4PenelopeIonisationCrossSection::FindShellIDIndex(const G4Material* mat,
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G4int Z,
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G4AtomicShellEnumerator shell)
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{
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if (fVerboseLevel > 1)
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G4cout << "Entering in method G4PenelopeIonisationCrossSection::FindShellIDIndex()" << G4endl;
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if (!fShellIDTable)
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fShellIDTable = new std::map< std::pair<const G4Material*,G4int>, G4DataVector*>;
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std::pair<const G4Material*,G4int> theKey = std::make_pair(mat,Z);
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G4int result = -1;
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G4int ishell = G4int(shell);
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if (fShellIDTable->count(theKey)) //table already built, and containing the element
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{
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if (fVerboseLevel > 2)
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G4cout << "FindShellIDIndex: Table already built for " << mat->GetName() << G4endl;
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G4DataVector* theVec = fShellIDTable->find(theKey)->second;
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if (ishell>=0 && ishell < (G4int) theVec->size()) //check we are not off-boundary
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result = (G4int) (*theVec)[ishell];
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else
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{
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G4ExceptionDescription ed;
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ed << "Shell ID: " << ishell << " not available for material " << mat->GetName() << " and Z = " <<
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Z << G4endl;
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G4Exception("G4PenelopeIonisationCrossSection::FindShellIDIndex()","em2041",JustWarning,
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ed);
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return -1;
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}
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}
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else
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{
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if (fVerboseLevel > 2)
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G4cout << "FindShellIDIndex: Table to be built for " << mat->GetName() << G4endl;
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//Not contained: look for it
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G4PenelopeOscillatorTable* theTable = fOscManager->GetOscillatorTableIonisation(mat);
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size_t numberOfOscillators = theTable->size();
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//oscillator loop
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//initialize everything at -1
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G4DataVector* dat = new G4DataVector(fNMaxLevels,-1);
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for (size_t iosc=0;iosc<numberOfOscillators;iosc++)
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{
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G4PenelopeOscillator* theOsc = (*theTable)[iosc];
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//level is found!
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if (theOsc->GetParentZ() == Z)
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{
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//individual shells relative to the given material
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G4int shFlag = theOsc->GetShellFlag();
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//Notice: GetShellFlag() starts from 1, the G4AtomicShellEnumerator from 0
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if (shFlag < 30)
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(*dat)[shFlag-1] = (G4double) iosc; //index of the given shell
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if ((shFlag-1) == ishell) // this is what we were looking for
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result = (G4int) iosc;
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}
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}
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fShellIDTable->insert(std::make_pair(theKey,dat));
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}
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if (fVerboseLevel > 1)
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G4cout << "Leaving method G4PenelopeIonisationCrossSection::FindShellIDIndex() with index = "
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<< result << G4endl;
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return result;
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}
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