Abstract

Neutron separation energies for the (γ, n) reaction have been determined for isotopes of niobium, cadmium, indium, antimony, tantalum, gold, thallium, lead and bismuth. A source of discrete energy photons which exceed the reactionQ-values was obtained from neutron capture on nickel and chromium placed in the core of the McMaster Nuclear Reactor. The photons illuminated the target and the photoneutrons produced were detected using a high resolution3He spectrometer. TheQ-values obtained possess greater precision, in most cases, than in any previous measurements.

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