$q_0(q,N)$ and $T_0(q,N)$ are taken to be functions of the charge $q$ and the isoelectronic sequence, labeled by $N$. A fit of the suppression factors of @summersRAL for all ions yielded a global (log) activation density $x_{a}^{0}=10.1821$ and more complicated expressions for the zero-point temperature $T_0$ and charge $q_0$. These were found to depend on both the ionic charge $q$ and the isoelectronic sequence $N$ viz. $$\begin{aligned}
T_0(q,N) &= &5\times10^{4}\,[q_0(q,N)]^{2} \label{t0}\end{aligned}$$ and $$\begin{aligned}
q_0(q,N) & = &  (1 - \sqrt{2/3q})A(N)/\sqrt{q}\ , \label{q0}\end{aligned}$$ where $$\begin{aligned}
A(N) & = &  12 + 10N_{1} + \frac{10N_{1}-2N_{2}}{N_{1}-N_{2}}(N-N_{1}) \label{AN}\end{aligned}$$ depends on the isoelectronic sequence in the periodic table according to the specification of the parameters $$\begin{aligned}
(N_{1},N_{2}) & = &
\begin{pmatrix}
  (3,10)  & N\in 2^{nd} \, \rm{row}  &   & (37,54)  & N\in 5^{th} \, \rm{row} \\
  (11,18) & N\in 3^{rd} \, \rm{row}  &   & (55,86)  & N\in 6^{th} \, \rm{row} \\
  (19,36) & N\in 4^{th} \, \rm{row}  &   & (87,118) & N\in 7^{th} \, \rm{row} \\
\end{pmatrix}\ .
\label{N1N2}\end{aligned}$$ However, even this rather complicated parameterization was inadequate for the lower isoelectronic sequences $N\le 5$, and for these we explicitly list the optimal values for $A(N)$ in Table \[TableXX\]. Furthermore, at electron temperatures and/or ionic charges 