Absolute ($\gamma ,{\mathrm{p}}_0$) and ($\gamma ,{\mathrm{p}}_1$) differential cross sections for ${}_{}{}^{19}{}_{}{}^{}\mathrm{F}$ have been measured at seven angles in the energy interval between 13.4 and 25.8 MeV. A sum of Legendre polynomials was fitted to the angular distributions to deduce the angular distribution coefficients. The ($\gamma ,{\mathrm{p}}_0$) and ($\gamma ,{\mathrm{p}}_1$) cross sections have a similar magnitude and represent a minor fraction of the total photoproton channel. The global difference between the two cross sections is attributed to configurational splitting effects. From the ($\gamma ,{\mathrm{p}}_0$) angular distribution coefficients, an $E2\mathrm{}$ cross section was estimated, contributing about 37% to the total $E2\mathrm{}$ energy-weighted sum rule.

• Received 3 February 1984

DOI:https://doi.org/10.1103/PhysRevC.29.2047