[819] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | // |
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| 27 | // $Id: G4CrossSectionIonisationBorn.cc,v 1.2 2007/11/08 18:51:34 pia Exp $ |
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| 28 | // GEANT4 tag $Name: $ |
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| 29 | // |
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| 30 | // Contact Author: Maria Grazia Pia (Maria.Grazia.Pia@cern.ch) |
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| 31 | // |
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| 32 | // Reference: TNS Geant4-DNA paper |
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| 33 | // Reference for implementation model: NIM. 155, pp. 145-156, 1978 |
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| 34 | |
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| 35 | // History: |
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| 36 | // ----------- |
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| 37 | // Date Name Modification |
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| 38 | // 28 Apr 2007 M.G. Pia Created in compliance with design described in TNS paper |
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| 39 | // |
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| 40 | // ------------------------------------------------------------------- |
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| 41 | |
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| 42 | // Class description: |
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| 43 | // Geant4-DNA Cross total cross section for electron elastic scattering in water |
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| 44 | // Reference: TNS Geant4-DNA paper |
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| 45 | // S. Chauvie et al., Geant4 physics processes for microdosimetry simulation: |
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| 46 | // design foundation and implementation of the first set of models, |
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| 47 | // IEEE Trans. Nucl. Sci., vol. 54, no. 6, Dec. 2007. |
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| 48 | // Further documentation available from http://www.ge.infn.it/geant4/dna |
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| 49 | |
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| 50 | // ------------------------------------------------------------------- |
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| 51 | |
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| 52 | |
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| 53 | #include "G4CrossSectionIonisationBorn.hh" |
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| 54 | #include "G4ParticleDefinition.hh" |
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| 55 | #include "G4Electron.hh" |
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| 56 | #include "G4Proton.hh" |
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| 57 | #include "G4Track.hh" |
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| 58 | #include "G4LogLogInterpolation.hh" |
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| 59 | #include "G4SystemOfUnits.hh" |
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| 60 | |
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| 61 | |
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| 62 | G4CrossSectionIonisationBorn::G4CrossSectionIonisationBorn() |
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| 63 | { |
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| 64 | |
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| 65 | name = "IonisationBorn"; |
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| 66 | |
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| 67 | // Default energy limits (defined for protection against anomalous behaviour only) |
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| 68 | lowEnergyLimitDefault = 25 * eV; |
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| 69 | highEnergyLimitDefault = 30 * keV; |
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| 70 | |
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| 71 | G4String fileElectron("dna/sigma_ionisation_e_born"); |
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| 72 | G4String fileProton("dna/sigma_ionisation_p_born"); |
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| 73 | |
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| 74 | G4ParticleDefinition* electronDef = G4Electron::ElectronDefinition(); |
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| 75 | G4ParticleDefinition* protonDef = G4Proton::ProtonDefinition(); |
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| 76 | |
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| 77 | G4String electron; |
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| 78 | G4String proton; |
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| 79 | |
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| 80 | // Factor to scale microscopic/macroscopic cross section data in water |
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| 81 | // ---- MGP ---- Hardcoded (taken from prototype code); to be replaced with proper calculation |
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| 82 | G4double scaleFactor = (1.e-22 / 3.343) * m*m; |
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| 83 | |
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| 84 | |
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| 85 | // Data members for electrons |
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| 86 | |
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| 87 | if (electronDef != 0) |
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| 88 | { |
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| 89 | electron = electronDef->GetParticleName(); |
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| 90 | tableFile[electron] = fileElectron; |
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| 91 | |
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| 92 | // Energy limits |
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| 93 | lowEnergyLimit[electron] = 25. * eV; |
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| 94 | highEnergyLimit[electron] = 30. * keV; |
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| 95 | |
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| 96 | // Create data set with electron cross section data and load values stored in file |
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| 97 | G4DNACrossSectionDataSet* tableE = new G4DNACrossSectionDataSet(new G4LogLogInterpolation, eV,scaleFactor ); |
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| 98 | tableE->LoadData(fileElectron); |
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| 99 | |
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| 100 | // Insert key-table pair in map |
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| 101 | tableData[electron] = tableE; |
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| 102 | } |
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| 103 | else |
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| 104 | { |
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| 105 | G4Exception("G4CrossSectionIonisationBorn Constructor: electron is not defined"); |
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| 106 | } |
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| 107 | |
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| 108 | // Data members for protons |
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| 109 | |
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| 110 | if (protonDef != 0) |
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| 111 | { |
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| 112 | proton = protonDef->GetParticleName(); |
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| 113 | tableFile[proton] = fileProton; |
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| 114 | |
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| 115 | // Energy limits |
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| 116 | lowEnergyLimit[proton] = 500. * keV; |
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| 117 | highEnergyLimit[proton] = 10. * MeV; |
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| 118 | |
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| 119 | // Create data set with proton cross section data and load values stored in file |
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| 120 | G4DNACrossSectionDataSet* tableP = new G4DNACrossSectionDataSet(new G4LogLogInterpolation, eV,scaleFactor ); |
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| 121 | tableP->LoadData(fileProton); |
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| 122 | |
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| 123 | // Insert key-table pair in map |
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| 124 | tableData[proton] = tableP; |
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| 125 | } |
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| 126 | else |
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| 127 | { |
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| 128 | G4Exception("G4CrossSectionIonisationBorn Constructor: proton is not defined"); |
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| 129 | } |
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| 130 | } |
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| 131 | |
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| 132 | |
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| 133 | G4CrossSectionIonisationBorn::~G4CrossSectionIonisationBorn() |
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| 134 | { |
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| 135 | // Destroy the content of the map |
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| 136 | std::map< G4String,G4DNACrossSectionDataSet*,std::less<G4String> >::iterator pos; |
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| 137 | for (pos = tableData.begin(); pos != tableData.end(); ++pos) |
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| 138 | { |
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| 139 | G4DNACrossSectionDataSet* table = pos->second; |
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| 140 | delete table; |
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| 141 | } |
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| 142 | } |
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| 143 | |
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| 144 | |
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| 145 | |
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| 146 | G4double G4CrossSectionIonisationBorn::CrossSection(const G4Track& track ) |
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| 147 | { |
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| 148 | const G4DynamicParticle* particle = track.GetDynamicParticle(); |
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| 149 | G4double k = particle->GetKineticEnergy(); |
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| 150 | |
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| 151 | // Cross section = 0 outside the energy validity limits set in the constructor |
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| 152 | G4double sigma = 0.; |
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| 153 | |
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| 154 | // ---- MGP ---- Better handling of these limits to be set in a following design iteration |
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| 155 | G4double lowLim = lowEnergyLimitDefault; |
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| 156 | G4double highLim = highEnergyLimitDefault; |
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| 157 | |
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| 158 | const G4String& particleName = particle->GetDefinition()->GetParticleName(); |
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| 159 | |
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| 160 | // Retrieve energy limits for the current particle type |
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| 161 | |
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| 162 | std::map< G4String,G4double,std::less<G4String> >::iterator pos1; |
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| 163 | pos1 = lowEnergyLimit.find(particleName); |
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| 164 | |
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| 165 | // Lower limit |
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| 166 | if (pos1 != lowEnergyLimit.end()) |
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| 167 | { |
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| 168 | lowLim = pos1->second; |
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| 169 | } |
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| 170 | |
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| 171 | // Upper limit |
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| 172 | std::map< G4String,G4double,std::less<G4String> >::iterator pos2; |
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| 173 | pos2 = highEnergyLimit.find(particleName); |
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| 174 | |
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| 175 | if (pos2 != highEnergyLimit.end()) |
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| 176 | { |
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| 177 | highLim = pos2->second; |
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| 178 | } |
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| 179 | |
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| 180 | // Verify that the current track is within the energy limits of validity of the cross section model |
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| 181 | if (k > lowLim && k < highLim) |
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| 182 | { |
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| 183 | std::map< G4String,G4DNACrossSectionDataSet*,std::less<G4String> >::iterator pos; |
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| 184 | pos = tableData.find(particleName); |
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| 185 | |
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| 186 | if (pos != tableData.end()) |
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| 187 | { |
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| 188 | G4DNACrossSectionDataSet* table = pos->second; |
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| 189 | if (table != 0) |
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| 190 | { |
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| 191 | // Cross section |
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| 192 | sigma = table->FindValue(k); |
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| 193 | } |
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| 194 | } |
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| 195 | else |
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| 196 | { |
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| 197 | // The track does not corresponds to a particle pertinent to this model |
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| 198 | G4Exception("G4CrossSectionIonisationBorn: attempting to calculate cross section for wrong particle"); |
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| 199 | } |
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| 200 | } |
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| 201 | |
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| 202 | return sigma; |
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| 203 | } |
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| 204 | |
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