Differential cross sections for the reaction 2 H(y,p)n were measured at five laboratory angles, from 32° to 130°, for photon energies 100, 140, 180, and 220 MeV. A quasimonochromatic photon beam was used and the photon spectrum was measured on line by a pair spectrometer. The absolute normalization uncertainty is within ±5%. Data agree within the total errors with the recent results of a tagged-photon experiment and of a measurement of the inverse process.
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