Import Geant4 9.2.0 source tree
This commit is contained in:
Gabriele Cosmo
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//
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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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// $Id: G4LivermoreRayleighModel.cc,v 1.1 2008/10/30 14:16:35 sincerti Exp $
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// GEANT4 tag $Name: geant4-09-02 $
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//
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#include "G4LivermoreRayleighModel.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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using namespace std;
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4LivermoreRayleighModel::G4LivermoreRayleighModel(const G4ParticleDefinition*,
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const G4String& nam)
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:G4VEmModel(nam),isInitialised(false)
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{
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lowEnergyLimit = 250 * eV; // SI - Could be 10 eV ?
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highEnergyLimit = 100 * GeV;
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SetLowEnergyLimit(lowEnergyLimit);
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SetHighEnergyLimit(highEnergyLimit);
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//
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verboseLevel= 0;
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// Verbosity scale:
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// 0 = nothing
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// 1 = warning for energy non-conservation
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// 2 = details of energy budget
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// 3 = calculation of cross sections, file openings, sampling of atoms
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// 4 = entering in methods
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G4cout << "Livermore Rayleigh is constructed " << G4endl
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<< "Energy range: "
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<< lowEnergyLimit / keV << " keV - "
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<< highEnergyLimit / GeV << " GeV"
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<< G4endl;
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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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delete meanFreePathTable;
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delete crossSectionHandler;
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delete formFactorData;
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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 > 3)
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G4cout << "Calling G4LivermoreRayleighModel::Initialise()" << G4endl;
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InitialiseElementSelectors(particle,cuts);
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// Energy limits
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if (LowEnergyLimit() < lowEnergyLimit)
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{
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G4cout << "G4LivermoreRayleighModel: low energy limit increased from " <<
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LowEnergyLimit()/eV << " eV to " << lowEnergyLimit << " eV" << G4endl;
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SetLowEnergyLimit(lowEnergyLimit);
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}
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if (HighEnergyLimit() > highEnergyLimit)
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{
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G4cout << "G4LivermoreRayleighModel: high energy limit decreased from " <<
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HighEnergyLimit()/GeV << " GeV to " << highEnergyLimit << " GeV" << G4endl;
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SetHighEnergyLimit(highEnergyLimit);
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}
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// Data are read for all materials
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crossSectionHandler = new G4CrossSectionHandler;
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crossSectionHandler->Clear();
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G4String crossSectionFile = "rayl/re-cs-";
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crossSectionHandler->LoadData(crossSectionFile);
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meanFreePathTable = 0;
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meanFreePathTable = crossSectionHandler->BuildMeanFreePathForMaterials();
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G4VDataSetAlgorithm* ffInterpolation = new G4LogLogInterpolation;
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G4String formFactorFile = "rayl/re-ff-";
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formFactorData = new G4CompositeEMDataSet(ffInterpolation,1.,1.);
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formFactorData->LoadData(formFactorFile);
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//
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if (verboseLevel > 2)
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G4cout << "Loaded cross section files for Livermore Rayleigh model" << G4endl;
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G4cout << "Livermore Rayleigh model is initialized " << G4endl
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<< "Energy range: "
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<< LowEnergyLimit() / keV << " keV - "
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<< HighEnergyLimit() / GeV << " GeV"
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<< G4endl;
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if(isInitialised) return;
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if(pParticleChange)
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fParticleChange = reinterpret_cast<G4ParticleChangeForGamma*>(pParticleChange);
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else
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fParticleChange = new G4ParticleChangeForGamma();
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isInitialised = true;
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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 > 3)
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G4cout << "Calling CrossSectionPerAtom() of G4LivermoreRayleighModel" << G4endl;
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G4double cs = crossSectionHandler->FindValue(G4int(Z), GammaEnergy);
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return cs;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4LivermoreRayleighModel::SampleSecondaries(std::vector<G4DynamicParticle*>* /*fvect*/,
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const G4MaterialCutsCouple* couple,
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const G4DynamicParticle* aDynamicGamma,
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G4double,
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G4double)
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{
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if (verboseLevel > 3)
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G4cout << "Calling SampleSecondaries() of G4LivermoreRayleighModel" << G4endl;
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G4double photonEnergy0 = aDynamicGamma->GetKineticEnergy();
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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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// SI - IS THE FOLLOWING RETURN NECESSARY ?
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return ;
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}
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G4ParticleMomentum photonDirection0 = aDynamicGamma->GetMomentumDirection();
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// Select randomly one element in the current material
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G4int Z = crossSectionHandler->SelectRandomAtom(couple,photonEnergy0);
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// Sample the angle of the scattered photon
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G4double wlPhoton = h_Planck*c_light/photonEnergy0;
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G4double gReject,x,dataFormFactor;
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G4double randomFormFactor;
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G4double cosTheta;
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G4double sinTheta;
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G4double fcostheta;
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do
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{
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do
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{
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cosTheta = 2. * G4UniformRand() - 1.;
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fcostheta = ( 1. + cosTheta*cosTheta)/2.;
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} while (fcostheta < G4UniformRand());
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G4double sinThetaHalf = std::sqrt((1. - cosTheta) / 2.);
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x = sinThetaHalf / (wlPhoton/cm);
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if (x > 1.e+005)
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dataFormFactor = formFactorData->FindValue(x,Z-1);
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else
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dataFormFactor = formFactorData->FindValue(0.,Z-1);
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randomFormFactor = G4UniformRand() * Z * Z;
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sinTheta = std::sqrt(1. - cosTheta*cosTheta);
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gReject = dataFormFactor * dataFormFactor;
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} while( gReject < randomFormFactor);
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// Scattered photon angles. ( Z - axis along the parent photon)
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G4double phi = twopi * G4UniformRand() ;
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G4double dirX = sinTheta*std::cos(phi);
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G4double dirY = sinTheta*std::sin(phi);
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G4double dirZ = cosTheta;
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// Update G4VParticleChange for the scattered photon
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G4ThreeVector photonDirection1(dirX, dirY, dirZ);
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photonDirection1.rotateUz(photonDirection0);
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fParticleChange->ProposeMomentumDirection(photonDirection1);
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fParticleChange->SetProposedKineticEnergy(photonEnergy0);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4double G4LivermoreRayleighModel::GetMeanFreePath(const G4Track& track,
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G4double, // previousStepSize
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G4ForceCondition*)
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{
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const G4DynamicParticle* photon = track.GetDynamicParticle();
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G4double energy = photon->GetKineticEnergy();
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const G4MaterialCutsCouple* couple = track.GetMaterialCutsCouple();
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size_t materialIndex = couple->GetIndex();
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G4double meanFreePath;
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if (energy > highEnergyLimit) meanFreePath = meanFreePathTable->FindValue(highEnergyLimit,materialIndex);
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else if (energy < lowEnergyLimit) meanFreePath = DBL_MAX;
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else meanFreePath = meanFreePathTable->FindValue(energy,materialIndex);
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return meanFreePath;
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}
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