Nuclear Spectroscopy Utilizing an (Alpha, Nucleon) Resonance Reaction
Resonance reactions offer that vital element of simplicity required in nuclear spectroscopy, especially when they involve entrance and exit channels of channel spin 0 or 1/2, since then the formation and decay of any one of several possible intermediate states Jπ in a compound nucleus can take place only via a unique pair of incoming and outgoing partial waves 1, 1′ associated with angular distributions of highly individualistic shape and magnitude. The potentialities have already been intensively, and fruitfully, exploited  in studies of the 13C(α,no)16O reaction to arrive at spin and parity assignments to high-lying states of 17O occupying the region of level overlap where coherent interference between a pair of levels of unlike parity manifests itself in disruption of the 90° symmetry of the ensuing angular distribution.
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