| Geant4 Cross Reference |
1 // 1 //
2 // ******************************************* 2 // ********************************************************************
3 // * License and Disclaimer 3 // * License and Disclaimer *
4 // * 4 // * *
5 // * The Geant4 software is copyright of th 5 // * The Geant4 software is copyright of the Copyright Holders of *
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18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or *
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24 // ******************************************* 24 // ********************************************************************
25 // 25 //
26 26
27 #include <cmath> 27 #include <cmath>
28 #include "G4Exp.hh" << 28
29 #include "G4Log.hh" <<
30 #include "G4LowEXsection.hh" 29 #include "G4LowEXsection.hh"
31 #include "G4SystemOfUnits.hh" 30 #include "G4SystemOfUnits.hh"
32 31
33 G4double G4LowEXsection:: 32 G4double G4LowEXsection::
34 CrossSection(G4double aX) const 33 CrossSection(G4double aX) const
35 { 34 {
36 G4double result = 0; 35 G4double result = 0;
37 if(aX<front().first) return 0; 36 if(aX<front().first) return 0;
38 G4LowEXsection::const_iterator i; 37 G4LowEXsection::const_iterator i;
39 G4LowEXsection::const_iterator it=end(); 38 G4LowEXsection::const_iterator it=end();
40 for(i=begin(); i!=end(); i++) 39 for(i=begin(); i!=end(); i++)
41 { 40 {
42 if((*i).first/MeV>aX) break; 41 if((*i).first/MeV>aX) break;
43 it = i; 42 it = i;
44 } 43 }
45 G4double x1 = G4Log((*it).first); << 44 G4double x1 = std::log((*it).first);
46 G4double x2 = G4Log((*(it+1)).first); << 45 G4double x2 = std::log((*(it+1)).first);
47 G4double y1 = G4Log((*it).second); << 46 G4double y1 = std::log((*it).second);
48 G4double y2 = G4Log((*(it+1)).second); << 47 G4double y2 = std::log((*(it+1)).second);
49 G4double x = G4Log(aX); << 48 G4double x = std::log(aX);
50 G4double y = y1+(x-x1)*(y2-y1)/(x2-x1); 49 G4double y = y1+(x-x1)*(y2-y1)/(x2-x1);
51 result = G4Exp(y); << 50 result = std::exp(y);
52 return result*millibarn; 51 return result*millibarn;
53 } 52 }
54 53