\begin{table}%t4
\caption{\label{Acomp}A comparison between our $A$-values and the $A$-values in the literature.}
%\centering
 \begin{tabular}{@{}@{}llccccccccccc}
  \hline\hline \noalign{\smallskip}
Upper & Lower &  $\sigma$ & \multicolumn{9}{c}{$A (10^8$~s$^{-1}$)}\\
\cline{4-12}\noalign{\smallskip}
level & level &(cm$^{-1}$)  & This study & $R$\&$U$\tablefootmark{a}& $K$\tablefootmark{b} & $W$\&$W$\tablefootmark{c} & $G$\&$W$\tablefootmark{d} & $M$\tablefootmark{e} & $Wt$\tablefootmark{f} & $We$\tablefootmark{g} & $C$\&$B$\tablefootmark{h}\\
\hline\noalign{\smallskip}
$3{\rm d}^4$($^3$H)$4{\rm p}$ $^4$H$_{13/2}^{\rm o}$ &$3{\rm d}^4$($^3$G)$4{\rm s}$ $^4$G$_{11/2}$  & 30~336.36 & 0.099 & 0.207 & 0.318 &  && 0.33  &  0.17 & 0.17$^i$ & 0.86\\
$3{\rm d}^4$($^3$H)$4{\rm p}$ $^4$H$_{13/2}^{\rm o}$&$3{\rm d}^4$($^3$H)$4{\rm s}$ $^4$H$_{13/2}$&33~638.67 & 1.951 & 1.787 & 2.003 & & & 2.0 &1.5&1.5\tablefootmark{i} & 5.1\\
$3{\rm d}^4$($^3$H)$4{\rm p}$ $^4$H$_{11/2}^{\rm o}$ & $3{\rm d}^4$($^3$H)$4{\rm s}$ $^4$H$_{11/2}$ & 33~550.22 & 1.851 & 1.672 & 1.804  &   &   & 1.9 &  1.6 & 1.7$^i$ & 5.1\\
$3{\rm d}^4$($^3$H)$4{\rm p}$ $^4$H$_{9/2}^{\rm o}$&   $3{\rm d}^4$($^3$H)$4{\rm s}$ $^4$H$_{9/2}$ &33~487.47 & 1.720 & 1.600 & 2.207 & & & 2.3 &  1.7 & 1.8$^i$ & 3.6\\
$3{\rm d}^4$($^3$H)$4{\rm p}$ $^4$H$_{7/2}^{\rm o}$& $3{\rm d}^4$($^3$H)$4{\rm s}$ $^4$H$_{7/2}$ & 33~444.12 & 1.741 & 1.602 & 2.186 & &  & 2.3 & 0.52 & 0.55\tablefootmark{i} & 6.1\\
$3{\rm d}^4$($^3$H)$4{\rm p}$ $^4$G$_{9/2}^{\rm o}$& $3{\rm d}^4$($^3$H)$4{\rm s}$ $^4$H$_{9/2}$ & 37~134.48 & 0.100 & 0.186 & 0.183 & & 0.13(7) & & & &\\
$3{\rm d}^4$($^3$F)$4{\rm p}$ $^4$F$_{5/2}^{\rm o}$& $3{\rm d}^4$($^1$D)$4{\rm s}$ $^2$D$_{5/2}$ & 21~281.50 & 0.011 & 0.006 & 0.007 & 0.046(9)&&& 0.0492&&\\
  \hline
\end{tabular}
\tablefoot{\tablefoottext{a}{\citeauthor{RU} (\citeyear{RU}).} 
\tablefoottext{b}{\cite{Kurucz2}.} 
\tablefoottext{c}{\cite{Wujec}.} 
\tablefoottext{d}{\cite{Goly}.}
\tablefoottext{e}{\cite{Musielok}.} 
\tablefoottext{f}{\cite{Warner} (Calculated).} 
\tablefoottext{g}{\cite{Warner} (Experimental).} 
\tablefoottext{h}{\cite{Corliss}.} 
\tablefoottext{i}{Upper limit.}} 
\end{table}