| 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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