“…Rather than pulsing the neutrons from a steady state reactor with a mechanical chopper, it is possible to pulse the reactor itself. Such a pulsed reactor has been employed with good resolution at Dubna to study resonance capture (238)(239)(240)(241)(242). Electron linear accelerators also provide a prolific source of pulsed neutrons with narrow time dispersion which allows flight paths as short as 8 m. Such accelerators are in use at LRL, GGA, and RPI in the United States and at Saclay, France; Geel, Belgium; Moscow, USSR; and recently at Toronto, Canada (see Table 1).…”