Import Geant4 6.0.0 source tree

2016-06-09 10:41:53 +02:00
parent 4aea781e80
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+//
+// ********************************************************************
+// * DISCLAIMER                                                       *
+// *                                                                  *
+// * The following disclaimer summarizes all the specific disclaimers *
+// * of contributors to this software. The specific disclaimers,which *
+// * govern, are listed with their locations in:                      *
+// *   http://cern.ch/geant4/license                                  *
+// *                                                                  *
+// * Neither the authors of this software system, nor their employing *
+// * institutes,nor the agencies providing financial support for this *
+// * work  make  any representation or  warranty, express or implied, *
+// * regarding  this  software system or assume any liability for its *
+// * use.                                                             *
+// *                                                                  *
+// * This  code  implementation is the  intellectual property  of the *
+// * GEANT4 collaboration.                                            *
+// * By copying,  distributing  or modifying the Program (or any work *
+// * based  on  the Program)  you indicate  your  acceptance of  this *
+// * statement, and all its terms.                                    *
+// ********************************************************************
+//
+#include "G4LowEXsection.hh"
+#include <math.h>
+
+G4double G4LowEXsection::
+ CrossSection(G4double aX) const
+ {
+   G4double result = 0;
+   if(aX<front().first) return 0;
+   G4LowEXsection::const_iterator i;
+   G4LowEXsection::const_iterator it=end();
+   for(i=begin(); i!=end(); i++)
+   {
+     if((*i).first/MeV>aX) break;
+     it = i;
+   }
+   G4double x1 = log((*it).first);
+   G4double x2 = log((*(it+1)).first);
+   G4double y1 = log((*it).second);
+   G4double y2 = log((*(it+1)).second);
+   G4double x = log(aX);
+   G4double y = y1+(x-x1)*(y2-y1)/(x2-x1);
+   result = exp(y);
+   return result*millibarn;
+ }