Measurements of Double-differential Neutron Emission Cross Sections of ~6Li and ~7Li for 18 MeV Neutrons

摘要

Double-differential neutron emission cross sections of ~6Li and ~7Li were measured for 18MeV neutrons at Tohoku University 4.5MV Dynamitron facility. Neutron emission spectra were obtained down to lMeV at 13 angles with energy resolution good enough to separate discrete levels. A care was taken to eliminate the sample-dependent background due to parasitic neutrons. Experimental results were in fair agreement with the JENDL-3.2 data and a simple model considering a three-body breakup process and discrete level excitations.