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 * 6 // * the Geant4 Collaboration. It is provided 6 // * the Geant4 Collaboration. It is provided under the terms and * 7 // * conditions of the Geant4 Software License 7 // * conditions of the Geant4 Software License, included in the file * 8 // * LICENSE and available at http://cern.ch/ 8 // * LICENSE and available at http://cern.ch/geant4/license . These * 9 // * include a list of copyright holders. 9 // * include a list of copyright holders. * 10 // * 10 // * * 11 // * Neither the authors of this software syst 11 // * Neither the authors of this software system, nor their employing * 12 // * institutes,nor the agencies providing fin 12 // * institutes,nor the agencies providing financial support for this * 13 // * work make any representation or warran 13 // * work make any representation or warranty, express or implied, * 14 // * regarding this software system or assum 14 // * regarding this software system or assume any liability for its * 15 // * use. Please see the license in the file 15 // * use. Please see the license in the file LICENSE and URL above * 16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. * 17 // * 17 // * * 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 * 21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its * 22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your * 23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. * 24 // ******************************************* 24 // ******************************************************************** 25 // 25 // 26 << 27 #include <cmath> << 28 #include "G4Exp.hh" << 29 #include "G4Log.hh" << 30 #include "G4LowEXsection.hh" 26 #include "G4LowEXsection.hh" 31 #include "G4SystemOfUnits.hh" << 27 #include <cmath> 32 28 33 G4double G4LowEXsection:: 29 G4double G4LowEXsection:: 34 CrossSection(G4double aX) const 30 CrossSection(G4double aX) const 35 { 31 { 36 G4double result = 0; 32 G4double result = 0; 37 if(aX<front().first) return 0; 33 if(aX<front().first) return 0; 38 G4LowEXsection::const_iterator i; 34 G4LowEXsection::const_iterator i; 39 G4LowEXsection::const_iterator it=end(); 35 G4LowEXsection::const_iterator it=end(); 40 for(i=begin(); i!=end(); i++) 36 for(i=begin(); i!=end(); i++) 41 { 37 { 42 if((*i).first/MeV>aX) break; 38 if((*i).first/MeV>aX) break; 43 it = i; 39 it = i; 44 } 40 } 45 G4double x1 = G4Log((*it).first); << 41 G4double x1 = std::log((*it).first); 46 G4double x2 = G4Log((*(it+1)).first); << 42 G4double x2 = std::log((*(it+1)).first); 47 G4double y1 = G4Log((*it).second); << 43 G4double y1 = std::log((*it).second); 48 G4double y2 = G4Log((*(it+1)).second); << 44 G4double y2 = std::log((*(it+1)).second); 49 G4double x = G4Log(aX); << 45 G4double x = std::log(aX); 50 G4double y = y1+(x-x1)*(y2-y1)/(x2-x1); 46 G4double y = y1+(x-x1)*(y2-y1)/(x2-x1); 51 result = G4Exp(y); << 47 result = std::exp(y); 52 return result*millibarn; 48 return result*millibarn; 53 } 49 } 54 50