Abstract
An iron filtered neutron beam has been made to be available at the time-of-flight facility of the Japan Atomic Energy Research Institute electron linac in order to measure more accurate total cross sections in the keV region. Twenty five neutron peaks from 24.3 keV to 1 MeV, which have extremely large signal-to-background ratio of 10 4, were observed with a 6Li-glass and a plastic scintillator at a 100 m station. The usefulness of the present filtered neutron beam facility was made sure by measuring the total cross section of polyethylene. These values are in excellent agreement with values computed from evaluated data in JENDI-I and ENDF/B-V.
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