Exclusive 16O(γ,π-p) reaction in the Δ resonance region
van der Steenhoven, G.
Pham, L.D. et al. "Exclusive 16O(γ,π-p) reaction in the Δ resonance region." Physical Review C 46, no. 2 (1992): 621-626.
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We report the first exclusive (γ,π-p) measurements on a complex nucleus. The 16O(γ,π-p) reaction was measured at pion laboratory angles of 64° and 120°. Coincident protons were detected over the quasifree angular correlation range using a vertical array of seven plastic scintillator detectors spanning ±33° about the scattering plane. The cross sections are compared to factorized distorted-wave impulse approximation calculations; these provide a good description of the backward angle data, but are in serious disagreement with the forward angle data.