\begin{table}%t1
\caption{\label{Lifetimes}Lifetimes in \ion{Cr}{ii}.}  %\centering
\begin{tabular}{@{}llccccccccc} 
\hline\hline \noalign{\smallskip}
& & &\multicolumn{8}{c}{$\tau$ (ns)} \\
\cline{4-11}\noalign{\smallskip}
Configuration & Term &  $E$ (cm$^{-1}$)  & This work & $C$\&$B$\tablefootmark{a} & $WT$\tablefootmark{b} & $P$\tablefootmark{c} & $WE$\tablefootmark{d} & $E$\tablefootmark{e} & $L$\tablefootmark{f} & $R$\&$U$\tablefootmark{g} \\
\hline\noalign{\smallskip}
($a$~$^3$H)$4{\rm p}$ & $z$~$^4$H$^{\rm o}_{7/2}$ & 63~600 & 4.4(4) & 2.1(4)\tablefootmark{h} & 3.3\tablefootmark{h} & 4.0(4)\tablefootmark{h} & 5.3\tablefootmark{h, i}  & &3.3 & 4.4\\
($a$~$^3$H)$4{\rm p}$ & $z$~$^4$H$^{\rm o}_{9/2}$ & 63~706 & 4.4(4) & 2.1(4)\tablefootmark{h} & 3.3$^h$ & 4.0(4)\tablefootmark{h} & 5.3\tablefootmark{h, i} & &3.3 & 4.4\\
($a$~$^3$H)$4{\rm p}$ & $z$~$^4$H$^{\rm o}_{11/2}$ & 63~849 & 4.2(3) & 2.1(4)\tablefootmark{h} & 3.3$^h$ & 4.0(4)\tablefootmark{h} & 5.3\tablefootmark{h, i} & 5.0(5) &3.3 & 4.4\\
($a$~$^3$H)$4{\rm p}$ & $z$~$^4$H$^{\rm o}_{13/2}$ & 64~031 & 4.2(3) & 2.1(4)\tablefootmark{h} & 3.3\tablefootmark{h} & 4.0(4)\tablefootmark{h} & 5.3\tablefootmark{h,i}  & 4.7(5) &3.3 & 4.3\\
 & & & & & & & & & & \\
($a$~$^3$F)$4{\rm p}$ & $y$~$^4$F$^{\rm o}_{5/2}$ & 67~012 & 3.7(4) & & &  & & & & 4.3\\
($a$~$^3$F)$4{\rm p}$ & $y$~$^4$F$^{\rm o}_{3/2}$ & 67~070 & 3.9(5) & & &  & & & & 4.5\\
($a$~$^3$F)$4{\rm p}$ & $y$~$^4$F$^{\rm o}_{7/2}$ & 67~393 & 2.9(2) & & &  & & & & 2.9\\
($a$~$^3$F)$4{\rm p}$ & $y$~$^4$F$^{\rm o}_{9/2}$ & 67~448 & 2.9(2) & & & & & & & 2.9\\
 & & & & & & & & & &\\
($a$~$^3$H)$4{\rm p}$ & $y$~$^4$G$^{\rm o}_{7/2}$ & 67~333 & 2.6(2) & & &  3.4(2)\tablefootmark{h}$^h$ & & & & 2.6\\
($a$~$^3$H)$4{\rm p}$ & $y$~$^4$G$^{\rm o}_{5/2}$ & 67~344 & 2.6(2) & & &  3.4(2)\tablefootmark{h} & & & & 2.5 \\
($a$~$^3$H)$4{\rm p}$ & $y$~$^4$G$^{\rm o}_{9/2}$ & 67~353 & 2.6(2) & & &  3.4(2)\tablefootmark{h}$^h$ & & & & 2.5\\
($a$~$^3$H)$4{\rm p}$ & $y$~$^4$G$^{\rm o}_{11/2}$ & 67~369 & 2.7(2) & & &  3.4(2)\tablefootmark{h} & & & & 2.5\\
& & & & & & & & & & \\
($a$~$^3$F)$4{\rm p}$ & $z$~$^2$D$^{\rm o}_{3/2}$ & 67~379 & 3.1(3) & & &  & & & & 3.3\\
($a$~$^3$F)$4{\rm p}$ & $z$~$^2$D$^{\rm o}_{5/2}$ & 67~387 & 3.1(3) & & &  & & & & 3.4\\
\hline
\end{tabular}
\tablefoot{\tablefoottext{a}{\cite{Corliss} (Intensity measurement).}
\tablefoottext{b}{\cite{Warner} (Calculated).}
\tablefoottext{c}{\cite{Pinnington1973} (Beam-foil measurement).} 
\tablefoottext{d}{\cite{Warner} (Emission measurement).} 
\tablefoottext{e}{\cite{Engman} (Beam-foil measurement.} 
\tablefoottext{f}{\cite{Luke} (Calculated).}
\tablefoottext{g}{\citeauthor{RU} (\citeyear{RU}) (Calculated).} 
\tablefoottext{h}{Mean lifetime.} 
\tablefoottext{i}{Upper limit}.}
\end{table}