Gabriele Cosmo
149 lines
5.2 KiB
C++
149 lines
5.2 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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// $Id: G4EmElementSelector.cc,v 1.4 2008/08/21 18:53:32 vnivanch Exp $
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// GEANT4 tag $Name: geant4-09-02 $
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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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//
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// File name: G4EmElementSelector
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//
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// Author: Vladimir Ivanchenko
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//
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// Creation date: 29.05.2008
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//
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// Modifications:
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//
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// Class Description:
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//
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// Generic helper class for the random selection of an element
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// -------------------------------------------------------------------
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//
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#include "G4EmElementSelector.hh"
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#include "G4VEmModel.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4EmElementSelector::G4EmElementSelector(G4VEmModel* mod,
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const G4Material* mat,
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G4int bins,
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G4double emin,
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G4double emax,
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G4bool spline):
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model(mod), material(mat), nbins(bins), cutEnergy(-1.0),
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lowEnergy(emin), highEnergy(emax)
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{
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G4int n = material->GetNumberOfElements();
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nElmMinusOne = n - 1;
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theElementVector = material->GetElementVector();
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if(nElmMinusOne > 0) {
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for(G4int i=0; i<nElmMinusOne; i++) {
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G4PhysicsLogVector* v = new G4PhysicsLogVector(lowEnergy,highEnergy,nbins);
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v->SetSpline(spline);
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xSections.push_back(v);
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}
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}
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//G4cout << "G4EmElementSelector for " << mat->GetName() << " n= " << n << G4endl;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4EmElementSelector::~G4EmElementSelector()
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{
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if(nElmMinusOne > 0) {
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for(G4int i=0; i<nElmMinusOne; i++) {
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delete xSections[i];
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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 G4EmElementSelector::Initialise(const G4ParticleDefinition* part,
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G4double cut)
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{
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//G4cout << "G4EmElementSelector initialise for " << material->GetName() << G4endl;
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if(0 == nElmMinusOne || cut == cutEnergy) return;
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cutEnergy = cut;
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//G4cout << "cut(keV)= " << cut/keV << G4endl;
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G4double cross;
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const G4double* theAtomNumDensityVector = material->GetVecNbOfAtomsPerVolume();
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G4int i;
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G4int n = nElmMinusOne + 1;
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G4double* xsec = new G4double[n];
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// loop over bins
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for(G4int j=0; j<nbins; j++) {
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G4double e = (xSections[0])->GetLowEdgeEnergy(j);
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model->SetupForMaterial(part, material, e);
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cross = 0.0;
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//G4cout << "j= " << j << " e(MeV)= " << e/MeV << G4endl;
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for (i=0; i<n; i++) {
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cross += theAtomNumDensityVector[i]*
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model->ComputeCrossSectionPerAtom(part, (*theElementVector)[i], e,
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cutEnergy, e);
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xsec[i] = cross;
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}
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if(DBL_MIN >= cross) cross = 1.0;
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// normalise cross section sum
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for (i=0; i<nElmMinusOne; i++) {
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xSections[i]->PutValue(j, xsec[i]/cross);
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//G4cout << "i= " << i << " xs= " << xsec[i]/cross << G4endl;
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}
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}
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delete [] xsec;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void G4EmElementSelector::Dump(const G4ParticleDefinition* part)
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{
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G4cout << "======== G4EmElementSelector for the " << model->GetName();
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if(part) G4cout << " and " << part->GetParticleName();
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G4cout << " for " << material->GetName() << " ========" << G4endl;
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if(0 < nElmMinusOne) {
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for(G4int i=0; i<nElmMinusOne; i++) {
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G4cout << " " << (*theElementVector)[i]->GetName() << " : " << G4endl;
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G4cout << *(xSections[i]) << G4endl;
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}
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}
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G4cout << "Last Element in element vector"
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<< (*theElementVector)[nElmMinusOne]->GetName()
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<< G4endl;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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