HIGH-RESOLUTION NEUTRON TRANSMISSION MEASUREMENTS ON 235U, 239Pu, AND 238U


J.A. Harvey, N.W. Hill, F.G. Perey, G.L. Tweed and L. Leal

Engineering Physics and Mathematics Division
Oak Ridge National Laboratory, Oak Ridge, TN37831-6356 USA

High-resolution transmission measurements have been made on three sample thicknesses of both 235U and 239Pu at liquid nitrogen temperature and also on three of 238U at room temperature using neutrons from the water-moderated ORELA target. The data on 235U and 239Pu from 1 to 10,000 eV were obtained using 6Li glass scintillation detectors at 17.909- and 80.394-m flight paths. The 238U data from 1 to 100 keV were obtained using a new NE 110 proton-recoil scintillation detector at a 201.558-m flight path.

KEYWORDS: 235U, 239Pu, 238U, high-resolution transmission measurements