Gabriele Cosmo
181 lines
6.2 KiB
C++
181 lines
6.2 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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// GEANT4 Class file
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//
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// File name: G4VCrossSectionDataSet
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//
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// Author F.W. Jones, TRIUMF, 20-JAN-97
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//
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// Modifications:
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// 23.01.2009 V.Ivanchenko move constructor and destructor to source
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// 12.08.2011 G.Folger, V.Ivanchenko, T.Koi, D.Wright redesign the class
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//
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#include "G4VCrossSectionDataSet.hh"
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#include "G4SystemOfUnits.hh"
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#include "G4CrossSectionDataSetRegistry.hh"
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#include "G4Material.hh"
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#include "G4Element.hh"
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#include "G4Isotope.hh"
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#include "G4NistManager.hh"
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#include "Randomize.hh"
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#include "G4HadronicParameters.hh"
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G4VCrossSectionDataSet::G4VCrossSectionDataSet(const G4String& nam) :
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verboseLevel(0),minKinEnergy(0.0),
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maxKinEnergy(G4HadronicParameters::Instance()->GetMaxEnergy()),
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isForAllAtomsAndEnergies(false),name(nam)
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{
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registry = G4CrossSectionDataSetRegistry::Instance();
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registry->Register(this);
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}
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G4VCrossSectionDataSet::~G4VCrossSectionDataSet()
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{
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registry->DeRegister(this);
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}
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G4bool
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G4VCrossSectionDataSet::IsElementApplicable(const G4DynamicParticle*,
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G4int,
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const G4Material*)
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{
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return false;
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}
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G4bool
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G4VCrossSectionDataSet::IsIsoApplicable(const G4DynamicParticle*,
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G4int, G4int,
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const G4Element*,
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const G4Material*)
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{
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return false;
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}
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G4double
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G4VCrossSectionDataSet::ComputeCrossSection(const G4DynamicParticle* part,
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const G4Element* elm,
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const G4Material* mat)
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{
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G4int Z = elm->GetZasInt();
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if (IsElementApplicable(part, Z, mat)) {
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return GetElementCrossSection(part, Z, mat);
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}
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// isotope-wise cross section making sum over available
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// isotope cross sections, which may be incomplete, so
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// the result is corrected
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size_t nIso = elm->GetNumberOfIsotopes();
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G4double fact = 0.0;
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G4double xsec = 0.0;
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// user-defined isotope abundances
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const G4IsotopeVector* isoVector = elm->GetIsotopeVector();
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const G4double* abundVector = elm->GetRelativeAbundanceVector();
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for (size_t j=0; j<nIso; ++j) {
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const G4Isotope* iso = (*isoVector)[j];
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G4int A = iso->GetN();
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if(abundVector[j] > 0.0 && IsIsoApplicable(part, Z, A, elm, mat)) {
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fact += abundVector[j];
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xsec += abundVector[j]*GetIsoCrossSection(part, Z, A, iso, elm, mat);
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}
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}
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return (fact > 0.0) ? xsec/fact : 0.0;
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}
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G4double
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G4VCrossSectionDataSet::GetElementCrossSection(const G4DynamicParticle* dynPart,
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G4int Z,
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const G4Material* mat)
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{
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G4ExceptionDescription ed;
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ed << "GetElementCrossSection is not implemented in <" << name << ">\n"
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<< "Particle: " << dynPart->GetDefinition()->GetParticleName()
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<< " Ekin(MeV)= " << dynPart->GetKineticEnergy()/MeV;
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if(mat) { ed << " material: " << mat->GetName(); }
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ed << " target Z= " << Z << G4endl;
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G4Exception("G4VCrossSectionDataSet::GetElementCrossSection", "had001",
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FatalException, ed);
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return 0.0;
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}
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G4double
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G4VCrossSectionDataSet::GetIsoCrossSection(const G4DynamicParticle* dynPart,
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G4int Z, G4int A,
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const G4Isotope*,
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const G4Element* elm,
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const G4Material* mat)
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{
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G4ExceptionDescription ed;
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ed << "GetIsoCrossSection is not implemented in <" << name << ">\n"
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<< "Particle: " << dynPart->GetDefinition()->GetParticleName()
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<< " Ekin(MeV)= " << dynPart->GetKineticEnergy()/MeV;
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if(mat) { ed << " material: " << mat->GetName(); }
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if(elm) { ed << " element: " << elm->GetName(); }
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ed << " target Z= " << Z << " A= " << A << G4endl;
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G4Exception("G4VCrossSectionDataSet::GetIsoCrossSection", "had001",
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FatalException, ed);
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return 0.0;
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}
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const G4Isotope*
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G4VCrossSectionDataSet::SelectIsotope(const G4Element* anElement,
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G4double, G4double)
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{
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size_t nIso = anElement->GetNumberOfIsotopes();
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const G4Isotope* iso = anElement->GetIsotope(0);
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// more than 1 isotope
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if(1 < nIso) {
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const G4double* abundVector = anElement->GetRelativeAbundanceVector();
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G4double sum = 0.0;
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G4double q = G4UniformRand();
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for (size_t j=0; j<nIso; ++j) {
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sum += abundVector[j];
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if(q <= sum) {
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iso = anElement->GetIsotope(j);
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break;
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}
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}
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}
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return iso;
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}
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void G4VCrossSectionDataSet::BuildPhysicsTable(const G4ParticleDefinition&)
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{}
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void G4VCrossSectionDataSet::DumpPhysicsTable(const G4ParticleDefinition&)
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{}
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void G4VCrossSectionDataSet::CrossSectionDescription(std::ostream& outFile) const
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{
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outFile << "The description for this cross section data set has not been written yet.\n";
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}
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