The theoretical analysis necessary to isolate the effects of nuclear and Coulomb interactions in admixing the three $4^{-}$ states at 17.79, 18.98, and 19.80 MeV in ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ is presented. An isospin mixing matrix element of 110±10 keV is determined to be compatible with the recent pion and deuteron induced reaction cross sections.

NUCLEAR REACTIONS Isospin Mixing; Pion and deuteron induced reactions.

• Received 14 October 1980

DOI:https://doi.org/10.1103/PhysRevC.23.1279