Gabriele Cosmo
301 lines
9.2 KiB
C++
301 lines
9.2 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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// Author: Sebastien Incerti
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// 31 March 2012
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// on base of G4LivermoreRayleighModel
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//
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#include "G4LivermoreRayleighModel.hh"
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#include "G4SystemOfUnits.hh"
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#include "G4RayleighAngularGenerator.hh"
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using namespace std;
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4int G4LivermoreRayleighModel::maxZ = 100;
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G4LPhysicsFreeVector* G4LivermoreRayleighModel::dataCS[] = {0};
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G4LivermoreRayleighModel::G4LivermoreRayleighModel()
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:G4VEmModel("LivermoreRayleigh"),isInitialised(false)
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{
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fParticleChange = 0;
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lowEnergyLimit = 10 * eV;
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SetAngularDistribution(new G4RayleighAngularGenerator());
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verboseLevel= 0;
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// Verbosity scale for debugging purposes:
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// 0 = nothing
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// 1 = calculation of cross sections, file openings...
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// 2 = entering in methods
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if(verboseLevel > 0)
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{
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G4cout << "G4LivermoreRayleighModel is constructed " << G4endl;
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4LivermoreRayleighModel::~G4LivermoreRayleighModel()
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{
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if(IsMaster()) {
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for(G4int i=0; i<maxZ; ++i) {
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if(dataCS[i]) {
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delete dataCS[i];
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dataCS[i] = 0;
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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 G4LivermoreRayleighModel::Initialise(const G4ParticleDefinition* particle,
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const G4DataVector& cuts)
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{
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if (verboseLevel > 1)
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{
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G4cout << "Calling Initialise() of G4LivermoreRayleighModel." << G4endl
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<< "Energy range: "
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<< LowEnergyLimit() / eV << " eV - "
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<< HighEnergyLimit() / GeV << " GeV"
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<< G4endl;
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}
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if(IsMaster()) {
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// Initialise element selector
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InitialiseElementSelectors(particle, cuts);
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// Access to elements
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char* path = getenv("G4LEDATA");
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G4ProductionCutsTable* theCoupleTable =
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G4ProductionCutsTable::GetProductionCutsTable();
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G4int numOfCouples = theCoupleTable->GetTableSize();
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for(G4int i=0; i<numOfCouples; ++i)
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{
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const G4MaterialCutsCouple* couple =
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theCoupleTable->GetMaterialCutsCouple(i);
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const G4Material* material = couple->GetMaterial();
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const G4ElementVector* theElementVector = material->GetElementVector();
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G4int nelm = material->GetNumberOfElements();
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for (G4int j=0; j<nelm; ++j)
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{
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G4int Z = G4lrint((*theElementVector)[j]->GetZ());
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if(Z < 1) { Z = 1; }
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else if(Z > maxZ) { Z = maxZ; }
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if( (!dataCS[Z]) ) { ReadData(Z, path); }
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}
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}
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}
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if(isInitialised) { return; }
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fParticleChange = GetParticleChangeForGamma();
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isInitialised = true;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4LivermoreRayleighModel::InitialiseLocal(const G4ParticleDefinition*,
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G4VEmModel* masterModel)
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{
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SetElementSelectors(masterModel->GetElementSelectors());
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4LivermoreRayleighModel::ReadData(size_t Z, const char* path)
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{
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if (verboseLevel > 1)
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{
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G4cout << "Calling ReadData() of G4LivermoreRayleighModel"
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<< G4endl;
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}
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if(dataCS[Z]) { return; }
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const char* datadir = path;
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if(!datadir)
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{
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datadir = getenv("G4LEDATA");
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if(!datadir)
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{
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G4Exception("G4LivermoreRayleighModelModel::ReadData()","em0006",
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FatalException,
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"Environment variable G4LEDATA not defined");
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return;
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}
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}
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//
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dataCS[Z] = new G4LPhysicsFreeVector();
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// Activation of spline interpolation
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//dataCS[Z] ->SetSpline(true);
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std::ostringstream ostCS;
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ostCS << datadir << "/livermore/rayl/re-cs-" << Z <<".dat";
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std::ifstream finCS(ostCS.str().c_str());
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if( !finCS .is_open() )
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{
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G4ExceptionDescription ed;
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ed << "G4LivermoreRayleighModel data file <" << ostCS.str().c_str()
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<< "> is not opened!" << G4endl;
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G4Exception("G4LivermoreRayleighModel::ReadData()","em0003",FatalException,
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ed,"G4LEDATA version should be G4EMLOW6.27 or later.");
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return;
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}
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else
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{
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if(verboseLevel > 3) {
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G4cout << "File " << ostCS.str()
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<< " is opened by G4LivermoreRayleighModel" << G4endl;
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}
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dataCS[Z]->Retrieve(finCS, true);
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4double G4LivermoreRayleighModel::ComputeCrossSectionPerAtom(
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const G4ParticleDefinition*,
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G4double GammaEnergy,
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G4double Z, G4double,
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G4double, G4double)
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{
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if (verboseLevel > 1)
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{
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G4cout << "G4LivermoreRayleighModel::ComputeCrossSectionPerAtom()"
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<< G4endl;
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}
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if(GammaEnergy < lowEnergyLimit) { return 0.0; }
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G4double xs = 0.0;
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G4int intZ = G4lrint(Z);
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if(intZ < 1 || intZ > maxZ) { return xs; }
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G4LPhysicsFreeVector* pv = dataCS[intZ];
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// if element was not initialised
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// do initialisation safely for MT mode
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if(!pv) {
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InitialiseForElement(0, intZ);
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pv = dataCS[intZ];
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if(!pv) { return xs; }
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}
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G4int n = pv->GetVectorLength() - 1;
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G4double e = GammaEnergy/MeV;
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if(e >= pv->Energy(n)) {
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xs = (*pv)[n]/(e*e);
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} else if(e >= pv->Energy(0)) {
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xs = pv->Value(e)/(e*e);
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}
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if(verboseLevel > 0)
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{
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G4cout << "****** DEBUG: tcs value for Z=" << Z << " at energy (MeV)="
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<< e << G4endl;
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G4cout << " cs (Geant4 internal unit)=" << xs << G4endl;
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G4cout << " -> first E*E*cs value in CS data file (iu) =" << (*pv)[0]
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<< G4endl;
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G4cout << " -> last E*E*cs value in CS data file (iu) =" << (*pv)[n]
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<< G4endl;
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G4cout << "*********************************************************"
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<< G4endl;
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}
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return xs;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4LivermoreRayleighModel::SampleSecondaries(
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std::vector<G4DynamicParticle*>*,
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const G4MaterialCutsCouple* couple,
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const G4DynamicParticle* aDynamicGamma,
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G4double, G4double)
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{
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if (verboseLevel > 1) {
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G4cout << "Calling SampleSecondaries() of G4LivermoreRayleighModel"
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<< G4endl;
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}
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G4double photonEnergy0 = aDynamicGamma->GetKineticEnergy();
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// absorption of low-energy gamma
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/*
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if (photonEnergy0 <= lowEnergyLimit)
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{
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fParticleChange->ProposeTrackStatus(fStopAndKill);
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fParticleChange->SetProposedKineticEnergy(0.);
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fParticleChange->ProposeLocalEnergyDeposit(photonEnergy0);
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return ;
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}
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*/
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// Select randomly one element in the current material
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const G4ParticleDefinition* particle = aDynamicGamma->GetDefinition();
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const G4Element* elm = SelectRandomAtom(couple,particle,photonEnergy0);
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G4int Z = G4lrint(elm->GetZ());
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// Sample the angle of the scattered photon
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G4ThreeVector photonDirection =
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GetAngularDistribution()->SampleDirection(aDynamicGamma,
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photonEnergy0,
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Z, couple->GetMaterial());
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fParticleChange->ProposeMomentumDirection(photonDirection);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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#include "G4AutoLock.hh"
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namespace { G4Mutex LivermoreRayleighModelMutex = G4MUTEX_INITIALIZER; }
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void
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G4LivermoreRayleighModel::InitialiseForElement(const G4ParticleDefinition*,
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G4int Z)
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{
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G4AutoLock l(&LivermoreRayleighModelMutex);
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// G4cout << "G4LivermoreRayleighModel::InitialiseForElement Z= "
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// << Z << G4endl;
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if(!dataCS[Z]) { ReadData(Z); }
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l.unlock();
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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