Determining Meson Radiative Widths from Primakoff-Effect Measurements

We suggest that the measurement of vector-meson radiation decays $V\to P\gamma$ in the Primakoff-effect experiments on nuclei should be reanalyzed including isovector hadronic exchange. Its inclusion invalidates the assumption, made in data analyses, of $A$ independence of the strength of the strong-production amplitude and could well remove the disagreement between theory and experiment for $\Gamma (\rho \to \pi \gamma )$ and $\Gamma ({K^{*}}^0\to K^0\gamma )$.