Gabriele Cosmo
89 lines
2.8 KiB
C++
89 lines
2.8 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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#ifndef CCalDataSet_h
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#define CCalDataSet_h
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#include "G4NeutronHPInterpolator.hh"
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#include <vector>
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// by JPW, working, but to be cleaned up. @@@@
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class CCalDataSet
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{
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public:
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void insert(double anEnergy, double aXsection)
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{
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pair<double, double> aPoint(anEnergy, aXsection);
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theData.push_back(aPoint);
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}
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double getCrossSection(double anEnergy)
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{
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double result;
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if(anEnergy < theData[0].first)
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{
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result = 0;
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}
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else
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{
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double x1,x2;
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double y1,y2;
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if(anEnergy > theData[theData.size()-1].second)
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{
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// extrapolation
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int n=theData.size();
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x1 = theData[n-1].first;
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y1 = theData[n-1].second;
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x2 = theData[n-2].first;
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y2 = theData[n-2].second;
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}
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else
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{
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// linear search and interpolation
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unsigned int i;
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for(i=0; i<theData.size(); i++)
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{
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if(theData[i].first>anEnergy) break;
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}
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x1 = theData[i-1].first;
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y1 = theData[i-1].second;
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x2 = theData[i].first;
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y2 = theData[i].second;
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}
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// interpolate logarithmic in energy and linear in cross-section
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result = theInterpolator.Interpolate(LOGLIN, anEnergy, x1,x2,y1,y2);
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}
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return result*barn;
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}
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private:
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G4NeutronHPInterpolator theInterpolator;
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private:
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vector<pair<double, double> > theData;
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};
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#endif
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