\begin{table}%t2
%\centering
\par
\caption{\label{tab:cross}Rotational (de)excitation cross-sections (in $\AA^2$) of o-H$_2$O calculated with different basis sets: (1)~a complete $B(6,2)$ basis set, (2)~a B$^*$(6,4)[all, all, 5] basis set with an incomplete ladder in $j_2=4$,  (3)~a B$^*$(9,4)[10, 10, 5] basis set with incomplete ladders for $j_2=0,2,4$.  The transitions are labelled by the quantum numbers  $j_1 k_{\rm a} k_{\rm c} \rightarrow j'_1 k'_{\rm a} k'_{\rm c}$ ($j_2$-$j'_2$)  where primes are final states.}
\small \begin{tabular}{cccccc}
\hline\hline\noalign{\smallskip}
Total energy (cm$^{-1}$) &  Transition & B(6,2)&  B$^*$(6,4)[all, all, 5]&   B$^*$(9,4)[10, 10, 5] &  Difference \\
\hline  \noalign{\smallskip}  
 429.5  &       1$_{01}$ $\rightarrow$ 1$_{10}$ (0--2)  &   0.021  &    0.025    &   &16\% \\
         &      1$_{01}$ $\rightarrow$ 1$_{10}$ (0--0)   &  3.890   &    3.856    &  & 0,8\% \\
         & & & &  \\      
             &  3$_{30}$ $\rightarrow$ 1$_{10}$ (0--2)  &   0.443  &    0.500    &   &11\% \\
             &  3$_{30}$ $\rightarrow$ 1$_{10}$ (0--0)  &   0.106  &    0.102    &   & 4\% \\
& & & &  \\ 
 681.1        & 1$_{01}$ $\rightarrow$ 1$_{10}$ (0--2)  & & 0.176   &    0.175    &   0.5\% \\
              & 1$_{01}$ $\rightarrow$ 1$_{10}$ (0--0)  & & 4.3480  &    4.3489   &   0.02\% \\
& & & &  \\ 
              & 3$_{30}$ $\rightarrow$ 1$_{10}$ (0--2)  & & 0.9760  &    0.9773   &   0.1\% \\ 
              & 3$_{30}$ $\rightarrow$ 1$_{10}$ (0--0)  & & 0.1488  &    0.1481   &   0.4\% \\
& & & &  \\ 
 834.9        & 1$_{01}$ $\rightarrow$ 1$_{10}$ (0--2)  &   0.268  &    0.318    &  & 16\% \\
              & 1$_{01}$ $\rightarrow$ 1$_{10}$ (0--0)  &   4.454  &    4.412    &  & 1\% \\
& & & &  \\                 
             &  3$_{30}$ $\rightarrow$ 1$_{10}$ (0--2)  &   0.919  &    0.980    &  & 6\%  \\     
             &  3$_{30}$ $\rightarrow$ 1$_{10}$ (0--0)  &   0.194  &    0.186    &  & 4\% \\
\hline\noalign{\smallskip}
\end{tabular}
\end{table}