Parity Nonconservation inF18,F19, andNe21

Parity nonconservation has been studied in $^{18}\mathrm{F}$, $^{19}\mathrm{F}$, and $^{21}\mathrm{Ne}$ for the Weinberg-Salam model. After careful treatment of nuclear structures aspects, values are predicted for the $\ensuremath{\gamma}$-ray asymmetry and circular polarizations in good agreement with experiment provided one employs meson-nucleon coupling constants somewhat weaker than the "best values" recently suggested by Desplanques, Donoghue, and Holstein.