\begin{table}%t5
\par
\caption{\label{t5}The measured Si~IV Stark widths.}
%\centerline
 {
\begin{tabular}{cccccc}
\hline\hline
Transition~  &  $\lambda$ (nm)  &  $T$  &  $W_{\rm m}$   &  t  &  u \\
\hline\\[-3.2mm]
$\rm 4p ~^2P^{\circ}_{1/2}{-}5s ~^2S_{1/2}$  & 212.018  & 18.8  & 19.5 $\pm$ 3.9  & 19~     &   \\
$\rm 4p ~^2P^{\circ}_{3/2}{-}5s ~^2S_{1/2}$  & 212.747  & 18.8  & 22.2 $\pm$ 4.4  & 19~     &   \\
$\rm 4p ~^2P^{\circ}_{1/2}{-}4d ~^2D_{3/2}$  & 314.956  & 19.0  & 28.7 $\pm$ 3.2  & 66$^*$  & 14\\
$\rm 4p ~^2P^{\circ}_{3/2}{-}4d ~^2D_{5/2}$  & 316.571  & 19.0  & 29.6 $\pm$ 3.0  & 34~     & 14\\
$\rm 4d ~^2D_{3/2}{-}5p ~^2P^{\circ}_{3/2}$  & 376.244  & 18.8  & 66.5 $\pm$ 13.3  & 58~     &   \\
$\rm 4d ~^2D_{3/2}{-}5p ~^2P^{\circ}_{1/2}$  & 377.315  & 18.8  & 56.2 $\pm$ 11.2  & 46~     &   \\
$\rm 4s ~^2S_{1/2}{-}4p ~^2P^{\circ}_{3/2}$  & 408.885  & 19.0  & 29.6 $\pm$ 5.3  & 44~     & 12\\
$\rm 4s ~^2S_{1/2}{-}4p ~^2P^{\circ}_{1/2}$  & 411.610  & 19.0  & 26.5 $\pm$ 4.8  &         & 12\\
The transition is not given      & 251.751  & 19.0  & 35.1 $\pm$ 7.0  &         &   \\
\hline
\end{tabular}}
\medskip
\par
Note 5. Our measured Si~IV Stark {\it FWHM} ($W_{\rm m}$ in pm) at  given $T$
(in $10^3$~K $\pm$14\%) and $N = 1\times 10^{23}$~m$^{-3} \pm
13\%$, with estimated accuracies. The $W$ (in pm) values from
other experiments are also given: t~(Djeni\v ze et~al.  \cite{Djenize92})
and u~(Plati\v sa et~al. \cite{Platisa77})  obtained at following $T$ and
$N$: t~($T=29~000$~K, $N = 1.6 \times 10^{23}$~m$^{-3}$)  and u~($T=25~600$~K, $N = 5.8 \times 10^{22}$~m$^{-3}$). Asterisk
denotes value measured by Djeni\v ze et~al. (\cite{Djenize92}) at $T =48~000$~K and $N = 2.6 \times 10^{23}$~m$^{-3}$. Atomic data are taken from NIST.
\end{table}