\begin{table}%t4 \caption{\label{tab4}Comparison of oscillator strengths (f-values) for transitions among the lowest 31~levels of Cr~{\sc viii}. $a \pm b \equiv a \times 10^{{\pm}b}$.} \par \small%\centerline { \begin{tabular}{rrrrrrrr} \hline \hline &&&&&&& \\[-8pt] $I$ & $J$ & GRASP$^a$ & FAC$^b$ & MCDF$^c$ & HFR$^d$ & MCHF$^e$ & CIV3$^f$ \\ \hline 1 & 3 & 2.7329-2 & 2.738-2 & 3.640-2 & 1.725-2 & 2.883-2 & 2.0352-2 \\ 1 & 5 & 6.1208-5 & 6.279-5 & 1.096-5 & & 3.835-5 & 1.9998-6 \\ 1 & 6 & 3.3153-5 & 3.265-5 & 2.417-5 & & 2.470-5 & 4.8481-6 \\ 1 & 7 & 7.7487-6 & 8.232-6 & 1.112-5 & & 6.490-6 & 8.5762-6 \\ 1 & 9 & 2.8026-4 & 2.614-4 & 2.409-4 & & 2.422-4 & 2.4851-4 \\ 1 & 11 & 2.9348-4 & 3.068-4 & 1.312-4 & & 2.091-4 & 1.8123-4 \\ 1 & 12 & 2.2116-6 & 1.721-6 & 1.235-5 & & 2.821-6 & 8.2292-6 \\ 1 & 13 & 3.1990-3 & 3.074-3 & 2.357-3 & 2.750-3 & 2.536-3 & 1.5886-4 \\ 1 & 14 & 1.5679-3 & 1.513-3 & 9.129-4 & & 1.269-3 & 2.8196-3 \\ 1 & 15 & 6.5569-4 & 6.753-4 & 4.450-4 & & 4.821-4 & 6.0869-4 \\ 1 & 16 & 2.0759-6 & 1.333-6 & 2.739-4 & & 1.744-6 & 1.7192-4 \\ 1 & 17 & 1.7061-3 & 1.534-3 & 4.619-4 & & 1.158-3 & 6.5821-5 \\ 1 & 18 & 1.0379-3 & 9.755-4 & 1.950-3 & & 1.168-3 & 1.2197-2 \\ 1 & 22 & 1.3792-4 & 1.261-4 & 5.110-5 & & 8.843-5 & 1.7866-4 \\ 1 & 23 & 1.0501-3 & 1.097-3 & 6.892-4 & & 7.669-4 & 7.1719-4 \\ 1 & 25 & 2.1919-3 & 2.040-3 & 4.098-4 & & 1.483-3 & 1.0525-3 \\ 1 & 26 & 1.3080-3 & 1.047-3 & 3.820-4 & & 4.458-4 & 1.7047-4 \\ 1 & 27 & 3.6335-1 & 3.602-1 & 3.517-1 & 4.060-1 & 3.883-1 & 3.7922-1 \\ 1 & 28 & 8.5198-1 & 8.497-1 & 8.794-1 & 1.062-0 & 8.508-1 & 8.3900-1 \\ 1 & 29 & 1.2077-1 & 1.209-1 & 1.315-1 & 1.425-1 & 1.119-1 & 1.1876-1 \\ 1 & 30 & 1.5247-0 & 1.512-0 & 1.556-0 & 1.735-0 & 1.576-0 & 1.5074-0 \\ 1 & 31 & 5.1480-2 & 4.807-2 & 4.397-2 & 6.400-2 & 7.200-2 & 5.5690-2 \\ 2 & 3 & 2.6819-2 & 2.687-2 & 3.519-2 & 1.750-2 & 2.714-2 & 2.0450-2 \\ 2 & 6 & 2.8933-6 & 2.902-6 & 2.961-6 & & 1.703-6 & 1.2931-5 \\ 2 & 7 & 2.6006-5 & 2.674-5 & 3.403-5 & & 2.081-5 & 2.7118-5 \\ 2 & 9 & 2.4343-3 & 2.346-3 & 1.964-3 & & 1.937-3 & 1.9512-3 \\ 2 & 12 & 4.3377-4 & 5.564-4 & 2.358-4 & & 4.384-4 & 1.1743-5 \\ 2 & 13 & 2.2017-3 & 2.006-3 & 1.954-3 & & 1.617-3 & 7.6583-4 \\ 2 & 14 & 2.4932-3 & 2.233-3 & 1.563-3 & & 1.966-3 & 1.0812-2 \\ 2 & 15 & 2.2527-4 & 2.230-4 & 2.821-4 & & 1.670-4 & 2.3988-4 \\ 2 & 16 & 9.0837-5 & 8.589-5 & 5.243-4 & & 8.648-5 & 2.5352-4 \\ 2 & 25 & 1.7498-3 & 2.121-3 & 7.589-3 & 8.500-3 & 2.149-3 & 6.4939-3 \\ 2 & 27 & 2.7359-1 & 2.735-1 & 2.865-1 & 2.630-1 & 2.645-1 & 2.8391-1 \\ 2 & 28 & 6.8732-2 & 6.328-2 & 4.712-2 & 1.160-1 & 1.011-1 & 7.6551-2 \\ 2 & 29 & 6.4037-1 & 6.343-1 & 6.436-1 & 8.330-1 & 6.748-1 & 6.4473-1 \\ 2 & 31 & 1.9137-0 & 1.902-0 & 1.982-0 & 2.172-0 & 1.944-0 & 1.8817-0 \\ \hline \end{tabular}} \medskip $a$: present calculations from the GRASP code with 4031~levels; $b$: present calculations from the FAC code with 4881~levels; $c$: calculations of Huang et~al. (\cite{knh}) from the MCDF code; $d$: calculations of Fawcett (\cite{bcf1}) from the HFR code; $e$: calculations of Froese~Fischer et~al. (\cite{cff}) from the MCHF code; $f$: calculations of Mohan et~al. (\cite{mm1}) from the CIV3~code. \end{table}