Isospin mixing in the yrast $I=\frac{5}{2^{+}}$ $T=\frac{1}{2}$ level has been calculated assuming an isoscalar nucleonnucleon interaction and the single-particle level spacings observed in ${}_{}{}^{17}{}_{}{}^{}\mathrm{O}$ and ${}_{}{}^{17}{}_{}{}^{}\mathrm{F}$. Results are presented for both the ($d_{\frac{5}{2}}$,$s_{\frac{1}{2}}$) and two variants of the ($d_{\frac{5}{2}}$,$s_{\frac{1}{2}}$,$d_{\frac{3}{2}}$) model spaces. The experimental value does not require the introduction of a charge symmetry or charge independence breaking nucleon-nucleon interaction.

NUCLEAR STRUCTURE Isospin mixing in ${}_{}{}^{19}{}_{}{}^{}\mathrm{F}$ calculated.

• Received 26 January 1979

DOI:https://doi.org/10.1103/PhysRevC.20.842