Geant4 Cross Reference |
1 // 2 // ******************************************************************** 3 // * License and Disclaimer * 4 // * * 5 // * The Geant4 software is copyright of the Copyright Holders of * 6 // * the Geant4 Collaboration. It is provided under the terms and * 7 // * conditions of the Geant4 Software License, included in the file * 8 // * LICENSE and available at http://cern.ch/geant4/license . These * 9 // * include a list of copyright holders. * 10 // * * 11 // * Neither the authors of this software system, nor their employing * 12 // * institutes,nor the agencies providing financial support for this * 13 // * work make any representation or warranty, express or implied, * 14 // * regarding this software system or assume any liability for its * 15 // * use. Please see the license in the file LICENSE and URL above * 16 // * for the full disclaimer and the limitation of liability. * 17 // * * 18 // * This code implementation is the result of the scientific and * 19 // * technical work of the GEANT4 collaboration. * 20 // * By using, copying, modifying or distributing the software (or * 21 // * any work based on the software) you agree to acknowledge its * 22 // * use in resulting scientific publications, and indicate your * 23 // * acceptance of all terms of the Geant4 Software license. * 24 // ******************************************************************** 25 // 26 #include "G4LENDFissionCrossSection.hh" 27 #include "G4SystemOfUnits.hh" 28 29 G4double G4LENDFissionCrossSection::getLENDCrossSection( G4GIDI_target* target , G4double ke , G4double temperature ) 30 { 31 if ( target == NULL ) return 0.0; 32 // 090407 33 // return target->getElasticCrossSection( ke/MeV , temperature )*barn; 34 //return target->getFissionCrossSectionAtE( ke/MeV , temperature )*barn; 35 G4double result = target->getFissionCrossSectionAtE( ke/MeV , temperature )*barn; 36 if ( result == 0.0 && ke/eV < 1.0e-4) 37 { 38 G4double el = 1.0e-4*eV; 39 G4double eh = 2.0e-4*eV; 40 G4double xs_el = target->getFissionCrossSectionAtE( el/MeV , temperature )*barn; 41 G4double xs_eh = target->getFissionCrossSectionAtE( eh/MeV , temperature )*barn; 42 result = GetUltraLowEnergyExtrapolatedXS( el , eh , xs_el , xs_eh , ke ); 43 } 44 return result; 45 } 46 47