\begin{table}%t2
\caption{\label{t2}The Si~I experimental Stark widths.}
%\centerline
 {
\begin{tabular}{cccccccccc}
\hline\hline
Transition& $\lambda$ (nm)& $T$& $W_{\rm m}$& $W_{\rm m}^{\rm corr}$ & $W_{\rm m}/W_{\rm th}$& $W_{\rm m}^{\rm corr}/W_{\rm th}$ &  a& b  &c \\
\hline\\[-3.2mm]
$\rm 3s^23p^2~^3P_0{-} 3s3p^3~^3D^{\circ}_1$  & 220.798  & 12.5  &  7.2 $\pm$ 2.2
  & 6.5 $\pm$ 2.2  &    &    &     &    &   \\ 
$\rm 3s^23p^2  ~^3P_1{-}
3s3p^3~^3D^{\circ}_2$  & 221.089  & 12.5  & 7.8 $\pm$ 2.3   & 6.1 $\pm$ 2.3  &    &    & 
  &    &  
  \\
$\rm 3s^23p^2  ~^3P_1{-}3s^23p4s
~^3P^{\circ}_2$  & 250.690  & 15.0  & 14.5 $\pm$ 4.1  & 14.1 $\pm$ 4.1  & 1.43  & 1.39  & 70  & 28  & 
\\ 
$\rm 3s^23p^2 ~^3P_0{-} 3s^23p4s
~^3P^{\circ}_1$  & 251.432  & 15.0  & 11.5 $\pm$ 3.2  & 11.2 $\pm$ 3.2  & 1.13  & 1.10  & 
  & 30  &   
  \\ 
$\rm 3s^23p^2  ~^3P_2{-}
3s^23p4s~^3P^{\circ}_2$  & 251.611  & 15.0  & 12.7 $\pm$ 3.6  & 
11.7 $\pm$ 3.6  & 1.25  & 1.15  &    & 30  &   
\\
$\rm 3s^23p^2  ~^3P_1{-}
3s^23p4s~^3P^{\circ}_1$  & 251.920  & 12.5  & 12.4 $\pm$ 3.5  & 11.2 $\pm$ 3.5  & 1.26  & 1.13  & 
  & 28  &   
  \\ 
 $\rm 3s^23p^2  ~^3P_1{-}
3s^23p4s~^3P^{\circ}_0$  & 252.411  & 12.5  & 11.9 $\pm$ 3.3  & 10.4 $\pm$ 3.4  & 1.20  & 1.05  & 72  & 28  & 
\\
$\rm 3s^23p^2 ~^3P_2{-} 3s^23p4s
~^3P^{\circ}_1$  & 252.851  & 12.5  & 13.0 $\pm$ 3.6  & 10.7 $\pm$ 3.7  & 1.31  & 1.07  & 68  & 30  & 
\\
$\rm 3s^23p^2 ~^1D_2{-}
3s^23p4s~^1P^{\circ}_1$  & 288.158  & 15.0  & 14.5 $\pm$ 4.1  &     & 1.04  & 
  & 54  & 34  &  62
  \\ 
  $\rm 3s^23p^2  ~^1D_2{-}
3s^23p4s~^3P^{\circ}_1$  & 298.764  & 15.0  & 14.7 $\pm$ 4.1  &       &     &    &     & 
  &  \\ 
  $\rm 3s^23p^27  ~^1S_0{-}
3s^23p4s~^1P^{\circ}_1$  & 390.552  & 12.5  & 20.8 $\pm$ 5.8  &    &  0.85  &    & 
  & 32  &  18\\ 
  The transition is not given
  & 206.119  & 15.0  & 5.0 $\pm$ 1.5  &    &     &     &    &    &  \\ 
  The transition is not given   & 243.515  & 12.5  & 12.5 $\pm$ 3.5  &       &     & 
  &    &    &  \\
  \hline
\end{tabular}}
\medskip
\par
Note 2. Our measured Si~I 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. $W_{\rm m}^{\rm corr}$ denotes Stark {\it FWHM} values
after corrections for self-absorption. The $W$ (in pm) values from
other experiments are also given: a (Sre\'ckovi\'c et~al. \cite{Sreckovic98}); b~(Puri\'c et~al. \cite{Puric74}) and c (Meyer \& Beck \cite{Meyer70}) obtained at
following $T$ and $N$: a ($T=28~500$~K, $N = 1.9 \times 10^{23}$~m$^{-3})$; b ($T=16~400$~K, $N = 1.0 \times 10^{23}$~m$^{-3})$,
and c ($T=12~200$~K, $N = 1.0 \times 10^{23}$~m$^{-3}).$ $W_{\rm th}$
represents values presented by Griem (\cite{Griem74}), calculated for
electrons as perturbers only. Expected corrections for
quasi-static broadening by ions, extrapolated from Griem (\cite{Griem74}, p.~343), is roughly about 10\% at the high densities in the
experiment. Atomic data are taken from NIST.
\end{table}