Geant4  10.02.p02
CCalDataSet.hh
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26 #ifndef CCalDataSet_h
27 #define CCalDataSet_h
28 
30 #include <vector>
31 
32 // by JPW, working, but to be cleaned up. @@@@
33 
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 
86 
87 private:
88 
89  vector<pair<double, double> > theData;
90 };
91 #endif
vector< pair< double, double > > theData
Definition: CCalDataSet.hh:89
const G4int n
G4ParticleHPInterpolator theInterpolator
Definition: CCalDataSet.hh:85
G4double Interpolate(G4InterpolationScheme aScheme, G4double x, G4double x1, G4double x2, G4double y1, G4double y2) const
double getCrossSection(double anEnergy)
Definition: CCalDataSet.hh:44
static const double barn
Definition: G4SIunits.hh:104
void insert(double anEnergy, double aXsection)
Definition: CCalDataSet.hh:38