\begin{table}%t4
\par
\caption{\label{t4}The measured Si~III Stark widths.}
%\centerline
 {
\begin{tabular}{ccccccccc}
\hline\hline
Transition   &  $\lambda$ (nm)   &  $T$   &  $W_{\rm m}$   & 
 m   &  n   &  p   &  q   &  r \\
\hline\\[-3.2mm]
$\rm 3s3p ~^1P^{\circ}_1 {-} 3p^2  ~^1D_2$  & 254.182  &  19.0  & $6.5\pm0.6$  &  30   &      &      &     &   \\
$\rm 3s3d ~^1D_2 {-} 3p3d ~^1D^{\circ}_2$  & 254.609  &  19.0  & $6.8\pm1.4$  &       &      &      &     &   \\
$\rm 3s3d ~^1D_2 {-} 3s4f  ~^1F^{\circ}_3$  & 255.921  &  19.0  & $6.8\pm1.4$  &       &      &      &     &   \\
$\rm 3p3d ~^1D^{\circ}_2 {-} 3p4p  ~^1P_1$  & 264.079  &  19.0  & $24.2\pm4.8$  &       &      &      &     &   \\
$\rm 3s4f ~^3F^{\circ}_2 {-} 3s6g  ~^3G_3$  & 303.473  &  18.8  & $17.5\pm3.5$  &       &      &      &     &   \\
$\rm 3s3d ~^3D_3 {-} 3s4p  ~^3P^{\circ}_2$  & 308.624  &  18.8  & $31.1\pm3.5$  &       &      &      &     &   \\
$\rm 3s3d ~^3D_2 {-} 3s4p  ~^3P^{\circ}_1$  & 309.342  &  18.8  & $28.5\pm3.0$  &       &      &      &     &   \\
$\rm 3s3d ~^3D_1 {-} 3s4p  ~^3P^{\circ}_0$  & 309.683  &  18.8  & $27.7\pm3.0$  & ~29   &      &      &     &   \\
$\rm 3s4d ~^1D_2 {-} 3p3d  ~^1P^{\circ}_1$  & 318.513  &  18.8  & $27.7\pm5.5$  &       &      &      &     &   \\
$\rm 3p3d ~^3F^{\circ}_3 {-} 3s5g  ~^3G_4$  & 319.650  &  18.8  & $32.3\pm6.5$  &       &      &      &     &   \\
$\rm 3s4p ~^3P^{\circ}_0 {-} 3s5s ~^3S_1$~  & 323.050  &  19.0  & $43.3\pm8.6$  &       &      &      & 18  &   \\
$\rm 3s4p ~^3P^{\circ}_1 {-} 3s5s ~^3S_1$~  & 323.395  &  19.0  & $44.6\pm8.9$  &       &      &      & 19  &   \\
$\rm 3s4p ~^3P^{\circ}_2 {-} 3s5s ~^3S_1$~  & 324.162  &  19.0  & $48.1\pm9.6$  & ~73   &      &      & 19  &   \\
$\rm 3s4d ~^3D_2{-}3s5f ~^3F^{\circ}_{3}$~~   & 348.691  &  19.0  & $50.2\pm10.0$  &      &      &      &     &   \\
$\rm 3s4p ~^1P^{\circ}_1 {-} 3s4d ~^1D_2 $  & 359.047  &  18.8  & $86.6\pm17.3$  &      &      &      &     &   \\
$\rm 3s4p ~^3P^{\circ}_0 {-} 3s4d ~^3D_1 $  & 379.141  &  18.8  & $74.3\pm13.8$  &      & ~68  & ~54  & 20  &   \\
$\rm 3s4p ~^3P^{\circ}_1 {-} 3s4d ~^3D_2 $  & 379.611  &  18.8  & $79.7\pm13.9$  &      & ~68  & ~48  &     &   \\
$\rm 3s4p ~^3P^{\circ}_2 {-} 3s4d ~^3D_3 $  & 380.654  &  18.8  & $78.4\pm14.6$  & 118  & ~69  & ~47  &     &   \\
$\rm 3s4f ~^1F^{\circ}_3 {-} 3s5g ~^1G_4 $  & 392.447  &  19.0  & $84.6\pm16.9$  & 163  &      &      &     &   \\
$\rm 3p^2 ~^1S_0 {-} 3s4p ~^1P^{\circ}_1 $  & 433.850  &  19.0  & $26.9\pm5.3$  &      &      &      &     &   \\
$\rm 3s4s ~^3S_1 {-} 3s4p ~^3P^{\circ}_2 $  & 455.262  &  19.0  & $51.2\pm9.2$  &       &      &      & 18  & 48\\
$\rm 3s4s ~^3S_1 {-} 3s4p ~^3P^{\circ}_1 $  & 456.782  &  19.0  & $54.2\pm9.8$  &       &      &      & 18  & 56\\
$\rm 3s4s ~^3S_1 {-} 3s4p ~^3P^{\circ}_0 $  & 457.476  &  19.0  & $48.5\pm9.3$  &       &      & 306  & 18  &   \\
$\rm 3s4d ~^1D_2 {-} 3s5f ~^1F^{\circ}_3 $  & 471.665  &  19.0  & $181\pm36$  & 277  &     &      &     &   \\
$\rm 3s4f ~^3F^{\circ}_2 {-} 3s5g ~^3G_3 $  & 481.333  &  19.0  & $398\pm79$  & 438  & 398  &      &     &   \\
$\rm 3s4f ~^3F^{\circ}_3 {-} 3s5g ~^3G_4 $  & 481.972  &  19.0  & $423\pm84$  & 438  & 425  &      &     &   \\
$\rm 3s4f ~^3F^{\circ}_4 {-} 3s5g ~^3G_5 $  & 482.897  &  19.0  & $421\pm84$  & 438  & 405  &      &     &   \\
$\rm 3s4s ~^1S_0 {-} 3s4p ~^1P^{\circ}_1 $  & 573.973  &  19.0  & $98.2\pm20.0$  &      &  87   &      &     &   \\
\hline
\end{tabular}}
\medskip
\par
Note 4. Our measured Si~III 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: m (Djeni\v ze et~al.  \cite{Djenize92}), n
(Gonzalez et~al. \cite{Gonzalez00}), p~(Kusch \& Schr\" oder \cite{Kusch82}), q~(Plati\v sa et~al. \cite{Platisa77}), and r~(Puri\'c et~al. \cite{Puric74}) obtained
at following $T$ and $N$: m~($T=4800$~K, $N = 2.6 \times 10^{23}$~m$^{-3}$), n ($T=19~000$~K, $N = 1.0 \times 10^{23}$~m$^{-3}$), p~($T=23~500$~K, $N = 1.0 \times 10^{23}$~m$^{-3}$), q ($T=25~600$~K, $N = 5.8 \times  10^{22}$~m$^{-3}$), and r ($T=8 700$~K, $N =
1.0 \times 10^{23}$~m$^{-3}$). Atomic data are taken from NIST.
\end{table}