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