\begin{table}%T2
\caption{Comparison of transition isotope shift in \ion{Sm}{ii}, measured relative to $^{154}$Sm.}
\label{shift}
%\centerline
 {\small
\begin{tabular}{c c c}
\hline\hline\\[-3.2mm]
Isotope &        \multicolumn{2}{c}{TIS ($^{154}$Sm$-$$^{\rm A}$Sm)(cm$^{-1}$)} \\
A &  This work & Villemoes et al. \\
\hline\\[-3.2mm]
$\lambda_{\rm air}$~= &5052.751~\AA & 5786.98~\AA \\
\multicolumn{3}{l}{$E_{\rm upper}$~= 30879.740~cm$^{-1}$}\\
\hline
148 & 0.311 & 0.312 \\
150 & 0.219 & 0.214 \\
152 & 0.072 & 0.071 \\
\hline \\[-3.2mm]                                                              
$\lambda_{\rm air}$~= & 5069.447~\AA$^a$ & 5831.02~\AA \\
\multicolumn{3}{l}{$E_{\rm upper}$~= 29934.800~cm$^{-1}$} \\
\hline 
148 & 0.303 & 0.294  \\
150 & 0.204 & 0.202  \\
152 & 0.068 & 0.067  \\
\hline \\[-3.2mm]                                                               
$\lambda_{\rm air}$~= & 5103.086~\AA & 5897.39~\AA\ \& 5963.22~\AA\ \\
\multicolumn{3}{l}{$E_{\rm upper}$~= 28997.140~cm$^{-1}$} \\
\hline 
148 & 0.303 & 0.281 \& 0.282  \\
150 & 0.198 & 0.193 \& 0.194  \\
152 & 0.065 & 0.064 \& 0.064  \\
\hline \\[-3.2mm]                                                               
$\lambda_{\rm air}$~= & 5104.472~\AA & 5965.7~\AA \\
\multicolumn{3}{l}{$E_{\rm upper}$~= 27631.180~cm$^{-1}$} \\
\hline 
148 & 0.276 & 0.267  \\
150 & 0.207 & 0.183  \\ 
152 & 0.060 & 0.061  \\
\hline
\end{tabular}}
\medskip
\par
$^a$ Blended on low wavenumber side of profile.
\end{table}