Import Geant4 9.6.0 source tree
This commit is contained in:
Gabriele Cosmo
+206
-121
@@ -23,25 +23,13 @@
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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: G4LivermoreGammaConversionModel.cc,v 1.9 2010-12-27 17:45:12 vnivanch Exp $
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// GEANT4 tag $Name: not supported by cvs2svn $
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//
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//
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// Author: Sebastien Incerti
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// 30 October 2008
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// on base of G4LowEnergyGammaConversion developed by A.Forti and M.G.Pia
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//
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// History:
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// --------
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// 12 Apr 2009 V Ivanchenko Cleanup initialisation and generation of secondaries:
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// - apply internal high-energy limit only in constructor
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// - do not apply low-energy limit (default is 0)
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// - use CLHEP electron mass for low-enegry limit
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// - remove MeanFreePath method and table
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// 26 Dec 2010 V Ivanchenko Load data tables only once to avoid memory leak
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// 22 January 2012
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// on base of G4LivermoreGammaConversionModel
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#include "G4LivermoreGammaConversionModel.hh"
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#include "G4PhysicalConstants.hh"
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#include "G4SystemOfUnits.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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@@ -51,27 +39,22 @@ using namespace std;
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G4LivermoreGammaConversionModel::G4LivermoreGammaConversionModel(const G4ParticleDefinition*,
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const G4String& nam)
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:G4VEmModel(nam),smallEnergy(2.*MeV),isInitialised(false),
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crossSectionHandler(0),meanFreePathTable(0)
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:G4VEmModel(nam),smallEnergy(2.*MeV),isInitialised(false),maxZ(99)
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{
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fParticleChange = 0;
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lowEnergyLimit = 2.0*electron_mass_c2;
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highEnergyLimit = 100 * GeV;
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SetHighEnergyLimit(highEnergyLimit);
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data.resize(maxZ+1,0);
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verboseLevel= 0;
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// Verbosity scale:
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// Verbosity scale for debugging purposes:
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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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// 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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G4cout << "Livermore Gamma conversion is constructed " << G4endl
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<< "Energy range: "
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<< lowEnergyLimit / MeV << " MeV - "
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<< highEnergyLimit / GeV << " GeV"
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<< G4endl;
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if(verboseLevel > 0)
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{
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G4cout << "G4LivermoreGammaConversionModel is constructed " << G4endl;
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}
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}
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@@ -79,44 +62,54 @@ G4LivermoreGammaConversionModel::G4LivermoreGammaConversionModel(const G4Particl
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G4LivermoreGammaConversionModel::~G4LivermoreGammaConversionModel()
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{
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if (crossSectionHandler) { delete crossSectionHandler; }
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for(G4int i=0; i<=maxZ; ++i) { delete data[i]; }
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void
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G4LivermoreGammaConversionModel::Initialise(const G4ParticleDefinition*,
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const G4DataVector&)
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G4LivermoreGammaConversionModel::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 G4LivermoreGammaConversionModel::Initialise()" << G4endl;
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}
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if (crossSectionHandler)
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if (verboseLevel > 1)
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{
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crossSectionHandler->Clear();
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delete crossSectionHandler;
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}
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// Read data tables for all materials
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crossSectionHandler = new G4CrossSectionHandler();
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crossSectionHandler->Initialise(0,lowEnergyLimit,100.*GeV,400);
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G4String crossSectionFile = "pair/pp-cs-";
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crossSectionHandler->LoadData(crossSectionFile);
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//
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if (verboseLevel > 2) {
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G4cout << "Loaded cross section files for Livermore Gamma Conversion model" << G4endl;
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}
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if (verboseLevel > 0) {
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G4cout << "Livermore Gamma Conversion model is initialized " << G4endl
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G4cout << "Calling Initialise() of G4LivermoreGammaConversionModel." << G4endl
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<< "Energy range: "
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<< LowEnergyLimit() / MeV << " MeV - "
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<< HighEnergyLimit() / GeV << " GeV"
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<< G4endl;
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}
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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 G4Material* material =
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theCoupleTable->GetMaterialCutsCouple(i)->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 = (G4int)(*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(!data[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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@@ -124,29 +117,121 @@ G4LivermoreGammaConversionModel::Initialise(const G4ParticleDefinition*,
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4LivermoreGammaConversionModel::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 G4LivermoreGammaConversionModel"
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<< G4endl;
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}
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if(data[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("G4LivermoreGammaConversionModel::ReadData()",
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"em0006",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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data[Z] = new G4LPhysicsFreeVector();
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// Activation of spline interpolation
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data[Z] ->SetSpline(true);
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//
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std::ostringstream ost;
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ost << datadir << "/livermore/pair/pp-cs-" << Z <<".dat";
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std::ifstream fin(ost.str().c_str());
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if( !fin.is_open())
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{
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G4ExceptionDescription ed;
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ed << "G4LivermoreGammaConversionModel data file <" << ost.str().c_str()
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<< "> is not opened!" << G4endl;
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G4Exception("G4LivermoreGammaConversionModel::ReadData()",
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"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) { G4cout << "File " << ost.str()
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<< " is opened by G4LivermoreGammaConversionModel" << G4endl;}
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data[Z]->Retrieve(fin, true);
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4double
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G4LivermoreGammaConversionModel::ComputeCrossSectionPerAtom(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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if (verboseLevel > 1)
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{
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G4cout << "Calling ComputeCrossSectionPerAtom() of G4LivermoreGammaConversionModel"
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<< G4endl;
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}
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if (GammaEnergy < lowEnergyLimit || GammaEnergy > highEnergyLimit) { return 0.0; }
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G4double cs = crossSectionHandler->FindValue(G4int(Z), GammaEnergy);
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return cs;
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if (GammaEnergy < lowEnergyLimit) { return 0.0; }
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G4double xs = 0.0;
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G4int intZ=G4int(Z);
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if(intZ < 1 || intZ > maxZ) { return xs; }
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G4LPhysicsFreeVector* pv = data[intZ];
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// element was not initialised
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if(!pv)
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{
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char* path = getenv("G4LEDATA");
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ReadData(intZ, path);
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pv = data[intZ];
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if(!pv) { return xs; }
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}
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// x-section is taken from the table
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xs = pv->Value(GammaEnergy);
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if(verboseLevel > 0)
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{
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G4int n = pv->GetVectorLength() - 1;
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G4cout << "****** DEBUG: tcs value for Z=" << Z << " at energy (MeV)=" << GammaEnergy/MeV << G4endl;
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G4cout << " cs (Geant4 internal unit)=" << xs << G4endl;
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G4cout << " -> first cs value in EADL data file (iu) =" << (*pv)[0] << G4endl;
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G4cout << " -> last cs value in EADL data file (iu) =" << (*pv)[n] << G4endl;
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G4cout << "*********************************************************" << 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 G4LivermoreGammaConversionModel::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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void G4LivermoreGammaConversionModel::SampleSecondaries(
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std::vector<G4DynamicParticle*>* fvect,
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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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// The energies of the e+ e- secondaries are sampled using the Bethe - Heitler
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@@ -159,68 +244,69 @@ void G4LivermoreGammaConversionModel::SampleSecondaries(std::vector<G4DynamicPar
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// pair creation in both nuclear and atomic electron fields. However triplet
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// prodution is not generated.
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if (verboseLevel > 3)
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if (verboseLevel > 1)
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G4cout << "Calling SampleSecondaries() of G4LivermoreGammaConversionModel" << G4endl;
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G4double photonEnergy = aDynamicGamma->GetKineticEnergy();
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G4ParticleMomentum photonDirection = aDynamicGamma->GetMomentumDirection();
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G4double epsilon ;
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G4double epsilon0 = electron_mass_c2 / photonEnergy ;
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G4double epsilon0Local = electron_mass_c2 / photonEnergy ;
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// Do it fast if photon energy < 2. MeV
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if (photonEnergy < smallEnergy )
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{
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epsilon = epsilon0 + (0.5 - epsilon0) * G4UniformRand();
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}
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{
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epsilon = epsilon0Local + (0.5 - epsilon0Local) * G4UniformRand();
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}
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else
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{
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// Select randomly one element in the current material
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//const G4Element* element = crossSectionHandler->SelectRandomElement(couple,photonEnergy);
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const G4ParticleDefinition* particle = aDynamicGamma->GetDefinition();
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const G4Element* element = SelectRandomAtom(couple,particle,photonEnergy);
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{
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// Select randomly one element in the current material
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if (element == 0)
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{
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G4cout << "G4LivermoreGammaConversionModel::SampleSecondaries - element = 0"
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<< G4endl;
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return;
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}
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G4IonisParamElm* ionisation = element->GetIonisation();
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if (ionisation == 0)
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{
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G4cout << "G4LivermoreGammaConversionModel::SampleSecondaries - ionisation = 0"
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<< G4endl;
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return;
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}
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const G4ParticleDefinition* particle = aDynamicGamma->GetDefinition();
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const G4Element* element = SelectRandomAtom(couple,particle,photonEnergy);
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// Extract Coulomb factor for this Element
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G4double fZ = 8. * (ionisation->GetlogZ3());
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if (photonEnergy > 50. * MeV) fZ += 8. * (element->GetfCoulomb());
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if (element == 0)
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{
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G4cout << "G4LivermoreGammaConversionModel::SampleSecondaries - element = 0"
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<< G4endl;
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return;
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}
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G4IonisParamElm* ionisation = element->GetIonisation();
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if (ionisation == 0)
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{
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G4cout << "G4LivermoreGammaConversionModel::SampleSecondaries - ionisation = 0"
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<< G4endl;
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return;
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}
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// Limits of the screening variable
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G4double screenFactor = 136. * epsilon0 / (element->GetIonisation()->GetZ3()) ;
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G4double screenMax = std::exp ((42.24 - fZ)/8.368) - 0.952 ;
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G4double screenMin = std::min(4.*screenFactor,screenMax) ;
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// Extract Coulomb factor for this Element
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G4double fZ = 8. * (ionisation->GetlogZ3());
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if (photonEnergy > 50. * MeV) fZ += 8. * (element->GetfCoulomb());
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// Limits of the energy sampling
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G4double epsilon1 = 0.5 - 0.5 * std::sqrt(1. - screenMin / screenMax) ;
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G4double epsilonMin = std::max(epsilon0,epsilon1);
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G4double epsilonRange = 0.5 - epsilonMin ;
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// Limits of the screening variable
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G4double screenFactor = 136. * epsilon0Local / (element->GetIonisation()->GetZ3()) ;
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G4double screenMax = std::exp ((42.24 - fZ)/8.368) - 0.952 ;
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G4double screenMin = std::min(4.*screenFactor,screenMax) ;
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// Sample the energy rate of the created electron (or positron)
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G4double screen;
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G4double gReject ;
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// Limits of the energy sampling
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G4double epsilon1 = 0.5 - 0.5 * std::sqrt(1. - screenMin / screenMax) ;
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G4double epsilonMin = std::max(epsilon0Local,epsilon1);
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G4double epsilonRange = 0.5 - epsilonMin ;
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G4double f10 = ScreenFunction1(screenMin) - fZ;
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G4double f20 = ScreenFunction2(screenMin) - fZ;
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G4double normF1 = std::max(f10 * epsilonRange * epsilonRange,0.);
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G4double normF2 = std::max(1.5 * f20,0.);
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// Sample the energy rate of the created electron (or positron)
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G4double screen;
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G4double gReject ;
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do {
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G4double f10 = ScreenFunction1(screenMin) - fZ;
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G4double f20 = ScreenFunction2(screenMin) - fZ;
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G4double normF1 = std::max(f10 * epsilonRange * epsilonRange,0.);
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G4double normF2 = std::max(1.5 * f20,0.);
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do
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{
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if (normF1 / (normF1 + normF2) > G4UniformRand() )
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{
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epsilon = 0.5 - epsilonRange * std::pow(G4UniformRand(), 0.3333) ;
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epsilon = 0.5 - epsilonRange * std::pow(G4UniformRand(), 0.333333) ;
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screen = screenFactor / (epsilon * (1. - epsilon));
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gReject = (ScreenFunction1(screen) - fZ) / f10 ;
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}
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@@ -231,15 +317,15 @@ void G4LivermoreGammaConversionModel::SampleSecondaries(std::vector<G4DynamicPar
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gReject = (ScreenFunction2(screen) - fZ) / f20 ;
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}
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} while ( gReject < G4UniformRand() );
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} // End of epsilon sampling
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} // End of epsilon sampling
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// Fix charges randomly
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G4double electronTotEnergy;
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G4double positronTotEnergy;
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if (G4int(2*G4UniformRand()))
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if (G4UniformRand() > 0.5)
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{
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electronTotEnergy = (1. - epsilon) * photonEnergy;
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positronTotEnergy = epsilon * photonEnergy;
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@@ -283,26 +369,23 @@ void G4LivermoreGammaConversionModel::SampleSecondaries(std::vector<G4DynamicPar
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G4double electronKineEnergy = std::max(0.,electronTotEnergy - electron_mass_c2) ;
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// SI - The range test has been removed wrt original G4LowEnergyGammaconversion class
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G4ThreeVector electronDirection (dxEle, dyEle, dzEle);
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electronDirection.rotateUz(photonDirection);
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G4DynamicParticle* particle1 = new G4DynamicParticle (G4Electron::Electron(),
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electronDirection,
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electronKineEnergy);
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electronDirection,
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electronKineEnergy);
|
||||
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||||
// The e+ is always created (even with kinetic energy = 0) for further annihilation
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// The e+ is always created
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G4double positronKineEnergy = std::max(0.,positronTotEnergy - electron_mass_c2) ;
|
||||
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// SI - The range test has been removed wrt original G4LowEnergyGammaconversion class
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||||
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G4ThreeVector positronDirection (dxPos, dyPos, dzPos);
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||||
positronDirection.rotateUz(photonDirection);
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||||
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// Create G4DynamicParticle object for the particle2
|
||||
G4DynamicParticle* particle2 = new G4DynamicParticle(G4Positron::Positron(),
|
||||
positronDirection, positronKineEnergy);
|
||||
positronDirection,
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||||
positronKineEnergy);
|
||||
// Fill output vector
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||||
fvect->push_back(particle1);
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||||
fvect->push_back(particle2);
|
||||
@@ -315,7 +398,8 @@ void G4LivermoreGammaConversionModel::SampleSecondaries(std::vector<G4DynamicPar
|
||||
|
||||
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
||||
|
||||
G4double G4LivermoreGammaConversionModel::ScreenFunction1(G4double screenVariable)
|
||||
G4double
|
||||
G4LivermoreGammaConversionModel::ScreenFunction1(G4double screenVariable)
|
||||
{
|
||||
// Compute the value of the screening function 3*phi1 - phi2
|
||||
|
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@@ -331,7 +415,8 @@ G4double G4LivermoreGammaConversionModel::ScreenFunction1(G4double screenVariabl
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4double G4LivermoreGammaConversionModel::ScreenFunction2(G4double screenVariable)
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G4double
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G4LivermoreGammaConversionModel::ScreenFunction2(G4double screenVariable)
|
||||
{
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||||
// Compute the value of the screening function 1.5*phi1 - 0.5*phi2
|
||||
|
||||
|
||||
Reference in New Issue
Block a user