| Geant4 Cross Reference |
1 // 1 //
2 // ******************************************* 2 // ********************************************************************
3 // * License and Disclaimer << 3 // * DISCLAIMER *
4 // * 4 // * *
5 // * The Geant4 software is copyright of th << 5 // * The following disclaimer summarizes all the specific disclaimers *
6 // * the Geant4 Collaboration. It is provided << 6 // * of contributors to this software. The specific disclaimers,which *
7 // * conditions of the Geant4 Software License << 7 // * govern, are listed with their locations in: *
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9 // * include a list of copyright holders. <<
10 // * 9 // * *
11 // * Neither the authors of this software syst 10 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing fin 11 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warran 12 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assum 13 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file << 14 // * use. *
16 // * for the full disclaimer and the limitatio <<
17 // * 15 // * *
18 // * This code implementation is the result << 16 // * This code implementation is the intellectual property of the *
19 // * technical work of the GEANT4 collaboratio << 17 // * GEANT4 collaboration. *
20 // * By using, copying, modifying or distri << 18 // * By copying, distributing or modifying the Program (or any work *
21 // * any work based on the software) you ag << 19 // * based on the Program) you indicate your acceptance of this *
22 // * use in resulting scientific publicati << 20 // * statement, and all its terms. *
23 // * acceptance of all terms of the Geant4 Sof <<
24 // ******************************************* 21 // ********************************************************************
25 // 22 //
26 <<
27 #include <cmath> <<
28 #include "G4Exp.hh" <<
29 #include "G4Log.hh" <<
30 #include "G4LowEXsection.hh" 23 #include "G4LowEXsection.hh"
31 #include "G4SystemOfUnits.hh" << 24 #include <math.h>
32 25
33 G4double G4LowEXsection:: 26 G4double G4LowEXsection::
34 CrossSection(G4double aX) const 27 CrossSection(G4double aX) const
35 { 28 {
36 G4double result = 0; 29 G4double result = 0;
37 if(aX<front().first) return 0; 30 if(aX<front().first) return 0;
38 G4LowEXsection::const_iterator i; 31 G4LowEXsection::const_iterator i;
39 G4LowEXsection::const_iterator it=end(); 32 G4LowEXsection::const_iterator it=end();
40 for(i=begin(); i!=end(); i++) 33 for(i=begin(); i!=end(); i++)
41 { 34 {
42 if((*i).first/MeV>aX) break; 35 if((*i).first/MeV>aX) break;
43 it = i; 36 it = i;
44 } 37 }
45 G4double x1 = G4Log((*it).first); << 38 G4double x1 = log((*it).first);
46 G4double x2 = G4Log((*(it+1)).first); << 39 G4double x2 = log((*(it+1)).first);
47 G4double y1 = G4Log((*it).second); << 40 G4double y1 = log((*it).second);
48 G4double y2 = G4Log((*(it+1)).second); << 41 G4double y2 = log((*(it+1)).second);
49 G4double x = G4Log(aX); << 42 G4double x = log(aX);
50 G4double y = y1+(x-x1)*(y2-y1)/(x2-x1); 43 G4double y = y1+(x-x1)*(y2-y1)/(x2-x1);
51 result = G4Exp(y); << 44 result = exp(y);
52 return result*millibarn; 45 return result*millibarn;
53 } 46 }
54 47