\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}