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 | #ifndef CCalDataSet_h |
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27 | #define CCalDataSet_h |
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28 | |
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29 | #include "G4NeutronHPInterpolator.hh" |
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30 | #include <vector> |
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31 | |
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32 | // by JPW, working, but to be cleaned up. @@@@ |
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33 | |
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34 | class CCalDataSet |
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35 | { |
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36 | public: |
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37 | |
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38 | void insert(double anEnergy, double aXsection) |
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39 | { |
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40 | pair<double, double> aPoint(anEnergy, aXsection); |
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41 | theData.push_back(aPoint); |
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42 | } |
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43 | |
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44 | double getCrossSection(double anEnergy) |
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45 | { |
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46 | double result; |
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47 | if(anEnergy < theData[0].first) |
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48 | { |
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49 | result = 0; |
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50 | } |
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51 | else |
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52 | { |
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53 | double x1,x2; |
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54 | double y1,y2; |
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55 | if(anEnergy > theData[theData.size()-1].second) |
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56 | { |
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57 | // extrapolation |
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58 | int n=theData.size(); |
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59 | x1 = theData[n-1].first; |
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60 | y1 = theData[n-1].second; |
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61 | x2 = theData[n-2].first; |
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62 | y2 = theData[n-2].second; |
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63 | } |
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64 | else |
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65 | { |
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66 | // linear search and interpolation |
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67 | unsigned int i; |
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68 | for(i=0; i<theData.size(); i++) |
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69 | { |
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70 | if(theData[i].first>anEnergy) break; |
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71 | } |
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72 | x1 = theData[i-1].first; |
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73 | y1 = theData[i-1].second; |
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74 | x2 = theData[i].first; |
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75 | y2 = theData[i].second; |
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76 | } |
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77 | // interpolate logarithmic in energy and linear in cross-section |
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78 | result = theInterpolator.Interpolate(LOGLIN, anEnergy, x1,x2,y1,y2); |
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79 | } |
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80 | return result*barn; |
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81 | } |
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82 | |
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83 | private: |
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84 | |
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85 | G4NeutronHPInterpolator theInterpolator; |
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86 | |
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87 | private: |
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88 | |
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89 | vector<pair<double, double> > theData; |
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90 | }; |
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91 | #endif |
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