Import Geant4 9.1.0 source tree
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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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//
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// $Id: G4CrossSectionIonisationBornPartial.cc,v 1.3 2007/11/09 20:11:04 pia Exp $
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// GEANT4 tag $Name: geant4-09-01 $
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//
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// Contact Author: Maria Grazia Pia (Maria.Grazia.Pia@cern.ch)
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//
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// Reference: TNS Geant4-DNA paper
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// Reference for implementation model: NIM. 155, pp. 145-156, 1978
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// History:
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// -----------
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// Date Name Modification
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// 28 Apr 2007 M.G. Pia Created in compliance with design described in TNS paper
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//
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// -------------------------------------------------------------------
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// Class description:
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// Geant4-DNA Cross total cross section for electron elastic scattering in water
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// Reference: TNS Geant4-DNA paper
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// S. Chauvie et al., Geant4 physics processes for microdosimetry simulation:
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// design foundation and implementation of the first set of models,
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// IEEE Trans. Nucl. Sci., vol. 54, no. 6, Dec. 2007.
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// Further documentation available from http://www.ge.infn.it/geant4/dna
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// -------------------------------------------------------------------
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#include "G4CrossSectionIonisationBornPartial.hh"
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#include "G4ParticleDefinition.hh"
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#include "G4Electron.hh"
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#include "G4Proton.hh"
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#include "G4Track.hh"
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#include "G4LogLogInterpolation.hh"
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#include "G4SystemOfUnits.hh"
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#include "Randomize.hh"
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#include <utility>
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G4CrossSectionIonisationBornPartial::G4CrossSectionIonisationBornPartial()
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{
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name = "IonisationBorn";
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// Default energy limits (defined for protection against anomalous behaviour only)
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name = "IonisationBornPartial";
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lowEnergyLimitDefault = 25 * eV;
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highEnergyLimitDefault = 30 * keV;
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G4String fileElectron("dna/sigma_ionisation_e_born");
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G4String fileProton("dna/sigma_ionisation_p_born");
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G4ParticleDefinition* electronDef = G4Electron::ElectronDefinition();
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G4ParticleDefinition* protonDef = G4Proton::ProtonDefinition();
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G4String electron;
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G4String proton;
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// Factor to scale microscopic/macroscopic cross section data in water
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// ---- MGP ---- Hardcoded (taken from prototype code); to be replaced with proper calculation
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G4double scaleFactor = (1.e-22 / 3.343) * m*m;
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// Data members for electrons
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if (electronDef != 0)
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{
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electron = electronDef->GetParticleName();
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tableFile[electron] = fileElectron;
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// Energy limits
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lowEnergyLimit[electron] = 25. * eV;
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highEnergyLimit[electron] = 30. * keV;
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// Create data set with electron cross section data and load values stored in file
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G4DNACrossSectionDataSet* tableE = new G4DNACrossSectionDataSet(new G4LogLogInterpolation, eV,scaleFactor );
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tableE->LoadData(fileElectron);
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// Insert key-table pair in map
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tableData[electron] = tableE;
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}
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else
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{
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G4Exception("G4CrossSectionIonisationBornPartial Constructor: electron is not defined");
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}
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// Data members for protons
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if (protonDef != 0)
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{
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proton = protonDef->GetParticleName();
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tableFile[proton] = fileProton;
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// Energy limits
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lowEnergyLimit[proton] = 500. * keV;
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highEnergyLimit[proton] = 10. * MeV;
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// Create data set with proton cross section data and load values stored in file
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G4DNACrossSectionDataSet* tableP = new G4DNACrossSectionDataSet(new G4LogLogInterpolation, eV,scaleFactor );
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tableP->LoadData(fileProton);
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// Insert key-table pair in map
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tableData[proton] = tableP;
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}
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else
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{
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G4Exception("G4CrossSectionIonisationBornPartial Constructor: proton is not defined");
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}
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}
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G4CrossSectionIonisationBornPartial::~G4CrossSectionIonisationBornPartial()
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{
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// Destroy the content of the map
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std::map< G4String,G4DNACrossSectionDataSet*,std::less<G4String> >::iterator pos;
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for (pos = tableData.begin(); pos != tableData.end(); ++pos)
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{
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G4DNACrossSectionDataSet* table = pos->second;
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delete table;
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}
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}
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G4int G4CrossSectionIonisationBornPartial::RandomSelect(G4double k, const G4String& particle )
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{
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G4int level = 0;
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// Retrieve data table corresponding to the current particle type
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std::map< G4String,G4DNACrossSectionDataSet*,std::less<G4String> >::iterator pos;
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pos = tableData.find(particle);
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if (pos != tableData.end())
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{
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G4DNACrossSectionDataSet* table = pos->second;
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if (table != 0)
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{
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// C-style arrays are used in G4DNACrossSectionDataSet: this design feature was
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// introduced without authorization and should be replaced by the use of STL containers
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G4double* valuesBuffer = new G4double[table->NumberOfComponents()];
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const size_t n(table->NumberOfComponents());
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size_t i(n);
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G4double value = 0.;
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while (i>0)
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{
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i--;
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valuesBuffer[i] = table->GetComponent(i)->FindValue(k);
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value += valuesBuffer[i];
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}
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value *= G4UniformRand();
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i = n;
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while (i > 0)
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{
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i--;
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if (valuesBuffer[i] > value)
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{
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delete[] valuesBuffer;
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return i;
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}
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value -= valuesBuffer[i];
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}
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// It should never end up here
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// ---- MGP ---- Is the following line really necessary?
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if (valuesBuffer) delete[] valuesBuffer;
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}
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}
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else
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{
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G4Exception("G4CrossSectionIonisationBornPartial: attempting to calculate cross section for wrong particle");
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}
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return level;
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}
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G4double G4CrossSectionIonisationBornPartial::CrossSection(const G4Track& track )
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{
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G4double sigma = 0.;
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const G4DynamicParticle* particle = track.GetDynamicParticle();
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G4double k = particle->GetKineticEnergy();
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// Cross section = 0 outside the energy validity limits set in the constructor
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// ---- MGP ---- Better handling of these limits to be set in a following design iteration
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G4double lowLim = lowEnergyLimitDefault;
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G4double highLim = highEnergyLimitDefault;
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const G4String& particleName = particle->GetDefinition()->GetParticleName();
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// Retrieve energy limits for the current particle type
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std::map< G4String,G4double,std::less<G4String> >::iterator pos1;
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pos1 = lowEnergyLimit.find(particleName);
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// Lower limit
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if (pos1 != lowEnergyLimit.end())
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{
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lowLim = pos1->second;
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}
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// Upper limit
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std::map< G4String,G4double,std::less<G4String> >::iterator pos2;
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pos2 = highEnergyLimit.find(particleName);
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if (pos2 != highEnergyLimit.end())
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{
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highLim = pos2->second;
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}
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// Verify that the current track is within the energy limits of validity of the cross section model
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if (k > lowLim && k < highLim)
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{
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std::map< G4String,G4DNACrossSectionDataSet*,std::less<G4String> >::iterator pos;
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pos = tableData.find(particleName);
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if (pos != tableData.end())
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{
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G4DNACrossSectionDataSet* table = pos->second;
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if (table != 0)
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{
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// ---- MGP ---- Temporary
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// table->PrintData();
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// Cross section
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sigma = table->FindValue(k);
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}
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}
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else
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{
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// The track corresponds to a not pertinent particle
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G4Exception("G4CrossSectionIonisationBornPartial: attempting to calculate cross section for wrong particle");
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}
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}
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return sigma;
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}
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G4double G4CrossSectionIonisationBornPartial::Sum(G4double /* energy */, const G4String& /* particle */)
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{
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return 0;
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}
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