[819] | 1 | // |
---|
| 2 | // ******************************************************************** |
---|
| 3 | // * License and Disclaimer * |
---|
| 4 | // * * |
---|
| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
---|
| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
---|
| 7 | // * conditions of the Geant4 Software License, included in the file * |
---|
| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
---|
| 9 | // * include a list of copyright holders. * |
---|
| 10 | // * * |
---|
| 11 | // * Neither the authors of this software system, nor their employing * |
---|
| 12 | // * institutes,nor the agencies providing financial support for this * |
---|
| 13 | // * work make any representation or warranty, express or implied, * |
---|
| 14 | // * regarding this software system or assume any liability for its * |
---|
| 15 | // * use. Please see the license in the file LICENSE and URL above * |
---|
| 16 | // * for the full disclaimer and the limitation of liability. * |
---|
| 17 | // * * |
---|
| 18 | // * This code implementation is the result of the scientific and * |
---|
| 19 | // * technical work of the GEANT4 collaboration. * |
---|
| 20 | // * By using, copying, modifying or distributing the software (or * |
---|
| 21 | // * any work based on the software) you agree to acknowledge its * |
---|
| 22 | // * use in resulting scientific publications, and indicate your * |
---|
| 23 | // * acceptance of all terms of the Geant4 Software license. * |
---|
| 24 | // ******************************************************************** |
---|
| 25 | // |
---|
| 26 | // |
---|
| 27 | // $Id: G4CrossSectionIonisationBornPartialElectron.cc,v 1.1 2007/10/15 08:57:54 pia Exp $ |
---|
[961] | 28 | // GEANT4 tag $Name: geant4-09-02-ref-02 $ |
---|
[819] | 29 | // |
---|
| 30 | // Contact Author: Maria Grazia Pia (Maria.Grazia.Pia@cern.ch) |
---|
| 31 | // |
---|
| 32 | // Reference: TNS Geant4-DNA paper |
---|
| 33 | // Reference for implementation model: NIM. 155, pp. 145-156, 1978 |
---|
| 34 | |
---|
| 35 | // History: |
---|
| 36 | // ----------- |
---|
| 37 | // Date Name Modification |
---|
| 38 | // 28 Apr 2007 M.G. Pia Created in compliance with design described in TNS paper |
---|
| 39 | // |
---|
| 40 | // ------------------------------------------------------------------- |
---|
| 41 | |
---|
| 42 | // Class description: |
---|
| 43 | // Geant4-DNA Cross total cross section for electron elastic scattering in water |
---|
| 44 | // Reference: TNS Geant4-DNA paper |
---|
| 45 | // S. Chauvie et al., Geant4 physics processes for microdosimetry simulation: |
---|
| 46 | // design foundation and implementation of the first set of models, |
---|
| 47 | // IEEE Trans. Nucl. Sci., vol. 54, no. 6, Dec. 2007. |
---|
| 48 | // Further documentation available from http://www.ge.infn.it/geant4/dna |
---|
| 49 | |
---|
| 50 | // ------------------------------------------------------------------- |
---|
| 51 | |
---|
| 52 | |
---|
| 53 | #include "G4CrossSectionIonisationBornPartialElectron.hh" |
---|
| 54 | #include "G4Track.hh" |
---|
| 55 | #include "G4DynamicParticle.hh" |
---|
| 56 | #include "G4ParticleDefinition.hh" |
---|
| 57 | #include "G4Electron.hh" |
---|
| 58 | #include "G4LogLogInterpolation.hh" |
---|
| 59 | |
---|
| 60 | #include "Randomize.hh" |
---|
| 61 | |
---|
| 62 | #include <deque> |
---|
| 63 | |
---|
| 64 | G4CrossSectionIonisationBornPartialElectron::G4CrossSectionIonisationBornPartialElectron() |
---|
| 65 | { |
---|
| 66 | table = 0; |
---|
| 67 | } |
---|
| 68 | |
---|
| 69 | |
---|
| 70 | G4CrossSectionIonisationBornPartialElectron::~G4CrossSectionIonisationBornPartialElectron() |
---|
| 71 | { |
---|
| 72 | delete table; |
---|
| 73 | } |
---|
| 74 | |
---|
| 75 | |
---|
| 76 | G4int G4CrossSectionIonisationBornPartialElectron::RandomSelect(G4double k) |
---|
| 77 | { |
---|
| 78 | // Lazy initialisation: load cross section tables in memory the first time access to them is required |
---|
| 79 | |
---|
| 80 | G4int level = 0; |
---|
| 81 | |
---|
| 82 | if (table == 0) |
---|
| 83 | { |
---|
| 84 | // Load tables |
---|
| 85 | // ---- MGP ---- |
---|
| 86 | table = new G4DNACrossSectionDataSet(new G4LogLogInterpolation, eV,(1e-22/3.343)*m*m ); |
---|
| 87 | table->LoadData("dna/sigmadiff_ionisation_e_born"); |
---|
| 88 | |
---|
| 89 | // ---- MGP ---- Temporary |
---|
| 90 | table->PrintData(); |
---|
| 91 | } |
---|
| 92 | |
---|
| 93 | G4double* valuesBuffer = new G4double[table->NumberOfComponents()]; |
---|
| 94 | |
---|
| 95 | const size_t n(table->NumberOfComponents()); |
---|
| 96 | size_t i(n); |
---|
| 97 | G4double value = 0.; |
---|
| 98 | |
---|
| 99 | while (i>0) |
---|
| 100 | { |
---|
| 101 | i--; |
---|
| 102 | valuesBuffer[i] = table->GetComponent(i)->FindValue(k); |
---|
| 103 | value += valuesBuffer[i]; |
---|
| 104 | } |
---|
| 105 | |
---|
| 106 | value *= G4UniformRand(); |
---|
| 107 | |
---|
| 108 | i = n; |
---|
| 109 | |
---|
| 110 | while (i > 0) |
---|
| 111 | { |
---|
| 112 | i--; |
---|
| 113 | |
---|
| 114 | if (valuesBuffer[i] > value) |
---|
| 115 | { |
---|
| 116 | delete[] valuesBuffer; |
---|
| 117 | return i; |
---|
| 118 | } |
---|
| 119 | value -= valuesBuffer[i]; |
---|
| 120 | } |
---|
| 121 | |
---|
| 122 | // It should never end up here |
---|
| 123 | |
---|
| 124 | // ---- MGP ---- Is the following line really necessary? |
---|
| 125 | if (valuesBuffer) delete[] valuesBuffer; |
---|
| 126 | |
---|
| 127 | return level; |
---|
| 128 | } |
---|
| 129 | |
---|