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: G4CrossSectionIonisationBornPartialElectron.cc,v 1.1 2007/10/15 08:57:54 pia Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-02 $ |
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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 "G4CrossSectionIonisationBornPartialElectron.hh" |
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54 | #include "G4Track.hh" |
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55 | #include "G4DynamicParticle.hh" |
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56 | #include "G4ParticleDefinition.hh" |
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57 | #include "G4Electron.hh" |
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58 | #include "G4LogLogInterpolation.hh" |
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59 | |
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60 | #include "Randomize.hh" |
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61 | |
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62 | #include <deque> |
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63 | |
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64 | G4CrossSectionIonisationBornPartialElectron::G4CrossSectionIonisationBornPartialElectron() |
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65 | { |
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66 | table = 0; |
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67 | } |
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68 | |
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69 | |
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70 | G4CrossSectionIonisationBornPartialElectron::~G4CrossSectionIonisationBornPartialElectron() |
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71 | { |
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72 | delete table; |
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73 | } |
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74 | |
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75 | |
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76 | G4int G4CrossSectionIonisationBornPartialElectron::RandomSelect(G4double k) |
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77 | { |
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78 | // Lazy initialisation: load cross section tables in memory the first time access to them is required |
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79 | |
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80 | G4int level = 0; |
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81 | |
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82 | if (table == 0) |
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83 | { |
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84 | // Load tables |
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85 | // ---- MGP ---- |
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86 | table = new G4DNACrossSectionDataSet(new G4LogLogInterpolation, eV,(1e-22/3.343)*m*m ); |
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87 | table->LoadData("dna/sigmadiff_ionisation_e_born"); |
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88 | |
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89 | // ---- MGP ---- Temporary |
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90 | table->PrintData(); |
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91 | } |
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92 | |
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93 | G4double* valuesBuffer = new G4double[table->NumberOfComponents()]; |
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94 | |
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95 | const size_t n(table->NumberOfComponents()); |
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96 | size_t i(n); |
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97 | G4double value = 0.; |
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98 | |
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99 | while (i>0) |
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100 | { |
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101 | i--; |
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102 | valuesBuffer[i] = table->GetComponent(i)->FindValue(k); |
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103 | value += valuesBuffer[i]; |
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104 | } |
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105 | |
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106 | value *= G4UniformRand(); |
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107 | |
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108 | i = n; |
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109 | |
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110 | while (i > 0) |
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111 | { |
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112 | i--; |
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113 | |
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114 | if (valuesBuffer[i] > value) |
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115 | { |
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116 | delete[] valuesBuffer; |
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117 | return i; |
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118 | } |
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119 | value -= valuesBuffer[i]; |
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120 | } |
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121 | |
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122 | // It should never end up here |
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123 | |
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124 | // ---- MGP ---- Is the following line really necessary? |
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125 | if (valuesBuffer) delete[] valuesBuffer; |
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126 | |
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127 | return level; |
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128 | } |
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129 | |
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