newcommand{rotatemultirow}[1]{parbox[t]{3mm}{multirow{6}{*}{rotatebox[origin=l]{90}{#1}}}}
begin{table}[t!]
caption{Caption.}
    {setlength{extrarowheight}{2pt}%
    begin{tabular}{|c|>{centering}p{24mm}|>{centering}p{20mm}|>{centering}p{15mm}|>{centering}p{22mm}|>{centering}p{12mm}|>{centering}p{12mm}|>{centering}p{12mm}|}
        cline{2-8}
        multicolumn{1}{c|}{}
        & $begin{matrix} textbf{Upper} \textbf{Level} end{matrix}$
        & $begin{matrix} textbf{Lower} \textbf{Level} end{matrix}$
        & $begin{matrix} textbf{$mathbf{lambda_{ij}}$} \ text{(nm)} end{matrix}$
        & $begin{matrix} textbf{$mathbf{A_{ij}}$} \ text{(10$^{7}$ s$^{-1}$)} end{matrix}$
        & $begin{matrix} textbf{$mathbf{beta_{exp}}$} \ text{(%)} end{matrix}$
        & $begin{matrix} textbf{$mathbf{beta_{th}}$} \ text{(%)} end{matrix}$
        & $begin{matrix} textbf{$mathbf{beta_{rec}}$} \ text{(%)} end{matrix}$  tabularnewline
        cline{1-8}
        hline
        textbf{He} &$dagger$ & $^{3}$S$_{1}$ & 1083.3 & 1.02 & textemdash & textemdash & textemdash tabularnewline
        hline
        rotatemultirow{textbf{Neon}hspace{1cm}}
        &multirow{3}[8]{20mm}{makecell{2p$_{6}$\(2$times$133.1,nm)}}
        & 1s$_{2}$ & 693.1 & 1.74-1.88 & 38 & 35 & 37 bigstrut tabularnewline cline{3-8}
        &  & 1s$_{4}$ & 630.7 & 0.42-0.59 & 11 & 11 & 11 bigstrut tabularnewline cline{3-8}
        &  & 1s$_{5}$ & 614.5 & 2.16-2.82 & 51 & 54 & 52 bigstrut tabularnewline
        cline{2-8}
        & multirow{3}[8]{20mm}{makecell{2p$_{8}$\(2$times$133.5,nm)}}
        & 1s$_{2}$ & 717.6 & 0.26-0.37 & 7 & 3 & 6 bigstrut tabularnewline cline{3-8}
        &  & 1s$_{4}$ & 650.8 & 2.03-3.00 & 58 & 63 & 60 bigstrut tabularnewline cline{3-8}
        &  & 1s$_{5}$ & 633.6 & 1.26-1.77 & 35 & 34 & 34 bigstrut tabularnewline
        hline
        rotatemultirow{textbf{Argon}hspace{1cm}}
        &multirow{3}[8]{20mm}{makecell{2p$_{6}$\(2$times$188.3,nm)}}
        & 1s$_{2}$ & 922.5 & 0.59-0.63 & 16 & 16 & 26 bigstrut tabularnewline cline{3-8}
        &  & 1s$_{4}$ & 800.6 & 0.48-0.51 & 13 & 12 & 25 bigstrut tabularnewline cline{3-8}
        &  & 1s$_{5}$ & 763.5 & 2.62-2.96 & 71 & 72 & 49 bigstrut tabularnewline
        cline{2-8}
        & multirow{3}[8]{20mm}{makecell{2p$_{8}$\(2$times$189.4,nm)}}
        & 1s$_{2}$ & 978.5 & 0.11-0.17 & 3 & 5 & 7 bigstrut tabularnewline cline{3-8}
        &  & 1s$_{4}$ & 842.5 & 2.11-2.52 & 66 & 67 & 51 bigstrut tabularnewline cline{3-8}
        &  & 1s$_{5}$ & 801.5 & 1.00-1.04 & 31 & 28 & 43 bigstrut tabularnewline
        hline
        rotatemultirow{textbf{Krypton}hspace{1cm}}
        &multirow{3}[8]{20mm}{makecell{2p$_{6}$\(2$times$214.8,nm)}}
        & 1s$_{2}$ & 1373.9 & 0.02-0.03 & 0 & 1 & 7 bigstrut tabularnewline cline{3-8}
        &  & 1s$_{4}$ & 819.0 & 0.9-1.1 & 26 & 24 & 22 bigstrut tabularnewline cline{3-8}
        &  & 1s$_{5}$ & 760.2 & 2.6-3.1 & 74 & 75 & 71 bigstrut tabularnewline
        cline{2-8}
        &multirow{3}[8]{20mm}{makecell{2p$_{8}$\(2$times$216.7,nm)}}
        & 1s$_{2}$ & 1547.4 & 0.003-0.008 & 0 & 0 & 1 bigstrut tabularnewline cline{3-8}
        &  & 1s$_{4}$ & 877.7 & 1.5-2.6 & 68 & 68 & 69 bigstrut tabularnewline cline{3-8}
        &  & 1s$_{5}$ & 810.4 & 0.7-1.1 & 32 & 32 & 30 bigstrut tabularnewline
        hline
        rotatemultirow{textbf{Xenon}hspace{1cm}}
        &multirow{3}[8]{20mm}{makecell{2p$_{6}$\(2$times$252.5,nm)}}
        & 1s$_{2}$ & 4932.4 & 0.002 & 0 & 0 & 0 bigstrut tabularnewline cline{3-8}
        &  & 1s$_{4}$ & 895.5 & 1.06 & 21 & 30 & 9 bigstrut tabularnewline cline{3-8}
        &  & 1s$_{5}$ & 823.4 & 2.49 & 79 & 70 & 91 bigstrut tabularnewline
        cline{2-8}
        &multirow{3}[8]{20mm}{makecell{2p$_{9}$\(2$times$256.0,nm)}}
        & 1s$_{2}$ & 10698.1 & 0 & 0 & 0 & 0 bigstrut tabularnewline cline{3-8}
        &  & 1s$_{4}$ & 992.6 & 1.96 & 49 & 65 & 71 bigstrut tabularnewline cline{3-8}
        &  & 1s$_{5}$ & 904.8 & 1.07 & 51 & 35 & 29 bigstrut tabularnewline
        hline
        rotatemultirow{textbf{Radon}hspace{-0.2cm}}
        &multirow{2}[8]{20mm}{vspace{-3mm}makecell{2p$_{6}$\(2$times$290.7,nm)}}
        & 1s$_{4}$ & 781.2 & NA & NA & NA & NA bigstrut tabularnewline cline{3-8}
        &  & 1s$_{5}$ & 705.7 & NA & NA & NA & NA bigstrut tabularnewline
        cline{2-8}
        &multirow{2}[8]{20mm}{vspace{-3mm}makecell{2p$_{9}$\(2$times$299.8,nm)}}
        & 1s$_{4}$ & 933.0 & NA & NA & NA & NA bigstrut tabularnewline cline{3-8}
        &  & 1s$_{5}$ & 827.3 & NA & NA & NA & NA bigstrut tabularnewline
        hline
    end{tabular}}
    label{tbl:choosingTransition}
end{table}