Measurement of neutron total cross-sections of Dy and Hf in the energy region from 0.002 to 100 keV

The neutron total cross-sections of Dy and Hf have been measured in the energy region from 0.002 to 100 keV by the neutron time-of-¯ight method with a 46 MeV electron linear accelerator of the Research Reactor Institute, Kyoto University. A 6Li glass scintillator has been used as a neutron detector and metallic plates of Dy and Hf samples, 0.5±5.0 mm thick, have been used for the neutron transmission measurement. The neutron ¯ight path from the water-cooled Ta target to the 6Li glass scintillator is 22.1‹0.01 m. The background level has been determined by the block-o€ method and/or by using notch-®lters of Co (132 eV), Ag (5.2 and 16.3 eV) and Mn (336 eV) and a Cd sheet. The present measurements are in general agreement with the previous ones and the evaluated data in ENDF/B-VI.