\begin{table}%t1
%\centering
\par
\caption{\label{tab:fit.P}Parameters of the fit (\protect\ref{eq:fit.P}).}
%\centering
\par
\begin{tabular}{rll|rll}
\hline\hline\rule[-1.4ex]{0pt}{4.3ex}
$i$ &~$a_i$(FPS) &~$a_i$(SLy) & i &~$a_i$(FPS) &~$a_i$(SLy)  \\
\hline\rule{0pt}{2.7ex}
$1$    & {6.22} &{6.22}        &~${10}$ &~~ 11.8421   &~~ 11.4950\\
$2$    & {6.121} & {6.121}     &~${11}$ &  ~$-22.003$  &~$-22.775$ \\
$3$    & 0.006004 & 0.005925   &~${12}$ &~~ 1.5552   &~~ 1.5707 \\
$4$    & 0.16345   & 0.16326   &~${13}$ &~~ 9.3      &~~ 4.3    \\
$5$    & 6.50      & 6.48      &~${14}$ &~~ 14.19    &~~ 14.08  \\
$6$    & 11.8440   & 11.4971   &~${15}$ &~~ 23.73    &~~ 27.80  \\
$7$    & 17.24     & 19.105    &~${16}$ & ~$-1.508$   &~$-1.653$  \\
$8$    & 1.065     & 0.8938    &~${17}$ &~~ 1.79     &~~ 1.50   \\
$9$    & 6.54      & 6.54      &~${18}$ &~~ 15.13    &~~ 14.67 \rule[-1.4ex]{0pt}{0pt}\\
\hline 
\end{tabular}
\end{table}