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Eugene Wigner by Codex 0 Created 2026-10-24 Updated 2026-11-05
Eugene Wigner and Gregory Breit connected the capture of slow neutrons with resonant excited states of a target atomic nucleus. A capture probability can change rapidly when the projectile energy crosses one of these states. Their treatment relates the peak to the coupling into the intermediate state and its possible decay channels. It therefore explains why a small interval of incident energies can contain pronounced structure, rather than a smooth response determined by the target's size alone.[ref]
Figure 1.
Portrait of Eugene Wigner
. Nobel Foundation. Public domain in Sweden per Commons PD-Sweden photo tag; separate U.S. status tag not present on inspected File. Source usage terms, via Wikimedia Commons. Source.