the suppression factor for , as given in Eq. \[eqsuppression\] with a scaled activation density as given by Eq. \[eqxa\], shown for two different temperatures. The red solid curve shows that the parameterization for $T=1\times10^{5}$ K, corresponding to an activation density of $x_{\rm{a}}=0.608$ (with $\mu=0.372$ and $w=4.969$), is in close agreement with the actual data of [@badnell] (open circles). The blue dashed curve is the parameterization for $T=1.5\times10^{4}$ K, using instead an activation density of $x_{\rm{a}}=0.196$ (and the same $\mu$ and $w$), and giving satisfactory agreement with the data of [@davidson] (solid circles). ](Fig1.eps){width="\textwidth"}

Generalized High-Temperature Suppression Formula {#BurgessHT}
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Given the suppression formula for Li-like , corresponding to ionic charge $q_0=3$ and temperature $T_0=10^5$ K, we wish to generalize this expression to other Li-like ions of charge $q$ and (high) $T$ according to the following qualitative guidelines. It is well known that density effects scale as $q^7$ — see @bates and @burgsum. The activation density is attained when the reionization rate in Eq. \[eqreion\], which depends linearly on the density, becomes comparable to the radiative stabilization rate in Eq. \[eqradstab\]. The radiative rate is independent of density and temperature, but scales with charge as $A_r\sim q^4$, whereas the electron-impact 