G4LENDFissionCrossSection.cc

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00026 #include "G4LENDFissionCrossSection.hh"
00027 #include "G4SystemOfUnits.hh"
00028 
00029 G4double G4LENDFissionCrossSection::getLENDCrossSection( G4GIDI_target* target , G4double ke , G4double temperature ) 
00030 {
00031    if ( target == NULL ) return 0.0;
00032 // 090407
00033 //   return target->getElasticCrossSection( ke/MeV , temperature )*barn;
00034    //return target->getFissionCrossSectionAtE( ke/MeV , temperature )*barn;
00035    G4double result = target->getFissionCrossSectionAtE( ke/MeV , temperature )*barn;
00036    if ( result == 0.0 && ke/eV < 1.0e-4) 
00037    {
00038       G4double el = 1.0e-4*eV;
00039       G4double eh = 2.0e-4*eV;
00040       G4double xs_el = target->getFissionCrossSectionAtE( el/MeV , temperature )*barn;
00041       G4double xs_eh = target->getFissionCrossSectionAtE( eh/MeV , temperature )*barn;
00042       result = GetUltraLowEnergyExtrapolatedXS( el , eh , xs_el , xs_eh , ke );
00043    }
00044    return result;
00045 }
00046 

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