Exclusive 16O(γ,π-p) reaction in the Δ resonance region

Pham, L.D.; Høibråten, S.; Redwine, R.P.; Tieger, D.R.; van der Steenhoven, G.; Wilson, K.E.; Yuly, M.E.; Federspiel, F.J.; Eisenstein, R.A.; Nathan, A.M.; Wood, S.A.; Beise, E.J.

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Date

1992-08

Author

Pham, L.D.

Høibråten, S.

Redwine, R.P.

Tieger, D.R.

van der Steenhoven, G.

Wilson, K.E.

Yuly, M.E.

Federspiel, F.J.

Eisenstein, R.A.

Nathan, A.M.

Wood, S.A.

Beise, E.J.

Citation

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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Abstract

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.