Abstract
Abstract The level structure of 16 O from 20 to 23 MeV has been studied by the measurement of excitation functions for the reactions 15 N(p, p') 15 N ∗ in energy increments of 20 keV. An enriched 15 N gas target was used and the 5.271–5.299 MeV doublet of positive-parity states in 15 N was resolved by means of a magnetic spectrometer. Decay to the first excited state at 5.271 MeV was found to be the most strongly resonant channel. Nine states in 16 O, five of them new, have been identified. Their widths have been measured and limits have been placed on some of the spins. Elastic scattering data were also taken over selected energy ranges. Comparisons are made with other reactions over the giant El resonance region of 16 O. Alternative interpretations of the low-lying positive-parity states of 15 N are discussed in light of the data.
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