\begin{table}%t2
%\centering
\par
\caption{\label{tab:dedxSRIM}Stopping power and penetration depth values for equivelocity 46~MeV $^{58}$Ni and 0.8 MeV protons in water ice calculated by SRIM code. } 
\par
 \small \begin{tabular}{ l l l c}
\hline \hline
Ion    & \multicolumn{2}{c}{Stopping Power}  & Penetration depth  \\
& \multicolumn{2}{c}{(keV$/\mu$m)}    & ($\mu$m)         \\
\cline{2-3}
& electronic      & nuclear    &   \\
\hline
0.8~MeV p       & 29     & 0.02            & 17.7 \\
46~MeV Ni    & 4900   & 15              & 19.5 \\
\hline  
\end{tabular}
\end{table}