Geant4  10.02.p01
G4LowEXsection.cc
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26 
27 #include <cmath>
28 #include "G4Exp.hh"
29 #include "G4Log.hh"
30 #include "G4LowEXsection.hh"
31 #include "G4SystemOfUnits.hh"
32 
35  {
36  G4double result = 0;
37  if(aX<front().first) return 0;
38  G4LowEXsection::const_iterator i;
39  G4LowEXsection::const_iterator it=end();
40  for(i=begin(); i!=end(); i++)
41  {
42  if((*i).first/MeV>aX) break;
43  it = i;
44  }
45  G4double x1 = G4Log((*it).first);
46  G4double x2 = G4Log((*(it+1)).first);
47  G4double y1 = G4Log((*it).second);
48  G4double y2 = G4Log((*(it+1)).second);
49  G4double x = G4Log(aX);
50  G4double y = y1+(x-x1)*(y2-y1)/(x2-x1);
51  result = G4Exp(y);
52  return result*millibarn;
53  }
static const double MeV
Definition: G4SIunits.hh:211
G4double CrossSection(G4double s) const
static const double second
Definition: G4SIunits.hh:156
G4double G4Log(G4double x)
Definition: G4Log.hh:230
G4double G4Exp(G4double initial_x)
Exponential Function double precision.
Definition: G4Exp.hh:183
const G4double x[NPOINTSGL]
static const double millibarn
Definition: G4SIunits.hh:105
double G4double
Definition: G4Types.hh:76