Gabriele Cosmo
139 lines
5.3 KiB
C++
139 lines
5.3 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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// Author: Maria Grazia Pia (Maria.Grazia.Pia@cern.ch)
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//
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// History:
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// -----------
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// 1 Aug 2001 MGP Created
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// 19 Jul 2002 VI Create composite data set for material
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// 24 Apr 2003 VI Cut per region mfpt
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//
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// 15 Jul 2009 Nicolas A. Karakatsanis
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//
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// - BuildCrossSectionForMaterials method was revised in order to calculate the
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// logarithmic values of the loaded data.
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// It retrieves the data values from the G4EMLOW data files but, then, calculates the
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// respective log values and loads them to seperate data structures.
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// The EM data sets, initialized this way, contain both non-log and log values.
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// These initialized data sets can enhance the computing performance of data interpolation
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// operations
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//
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// -------------------------------------------------------------------
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#include "G4CrossSectionHandler.hh"
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#include "G4VDataSetAlgorithm.hh"
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#include "G4VEMDataSet.hh"
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#include "G4EMDataSet.hh"
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#include "G4CompositeEMDataSet.hh"
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#include "G4ShellEMDataSet.hh"
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#include "G4ProductionCutsTable.hh"
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#include "G4Material.hh"
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#include "G4Element.hh"
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#include "Randomize.hh"
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#include <map>
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#include <vector>
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#include "G4LogLogInterpolation.hh"
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G4CrossSectionHandler::G4CrossSectionHandler()
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{ }
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G4CrossSectionHandler::~G4CrossSectionHandler()
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{ }
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std::vector<G4VEMDataSet*>*
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G4CrossSectionHandler::BuildCrossSectionsForMaterials(const G4DataVector& energyVector,
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const G4DataVector*)
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{
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G4DataVector* energies;
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G4DataVector* data;
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G4DataVector* log_energies;
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G4DataVector* log_data;
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std::vector<G4VEMDataSet*>* matCrossSections = new std::vector<G4VEMDataSet*>;
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const G4ProductionCutsTable* theCoupleTable=
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G4ProductionCutsTable::GetProductionCutsTable();
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size_t numOfCouples = theCoupleTable->GetTableSize();
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size_t nOfBins = energyVector.size();
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const G4VDataSetAlgorithm* interpolationAlgo = CreateInterpolation();
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for (size_t mLocal=0; mLocal<numOfCouples; mLocal++)
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{
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const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(mLocal);
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const G4Material* material= couple->GetMaterial();
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G4int nElements = material->GetNumberOfElements();
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const G4ElementVector* elementVector = material->GetElementVector();
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const G4double* nAtomsPerVolume = material->GetAtomicNumDensityVector();
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G4VDataSetAlgorithm* algo = interpolationAlgo->Clone();
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G4VEMDataSet* setForMat = new G4CompositeEMDataSet(algo,1.,1.);
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for (G4int i=0; i<nElements; i++) {
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G4int Z = (G4int) (*elementVector)[i]->GetZ();
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G4double density = nAtomsPerVolume[i];
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energies = new G4DataVector;
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data = new G4DataVector;
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log_energies = new G4DataVector;
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log_data = new G4DataVector;
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for (size_t bin=0; bin<nOfBins; bin++)
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{
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G4double e = energyVector[bin];
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energies->push_back(e);
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if (e==0.) e=1e-300;
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log_energies->push_back(std::log10(e));
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G4double cross = density*FindValue(Z,e);
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data->push_back(cross);
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if (cross==0.) cross=1e-300;
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log_data->push_back(std::log10(cross));
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}
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G4VDataSetAlgorithm* algo1 = interpolationAlgo->Clone();
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// G4VEMDataSet* elSet = new G4EMDataSet(i,energies,data,algo1,1.,1.);
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G4VEMDataSet* elSet = new G4EMDataSet(i,energies,data,log_energies,log_data,algo1,1.,1.);
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setForMat->AddComponent(elSet);
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}
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matCrossSections->push_back(setForMat);
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}
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delete interpolationAlgo;
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return matCrossSections;
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}
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