\begin{table}%t1
\caption{\label{stopping}The projected range $l_{i}$ and the stopping cross section
 $S^{(1)}_{i}$ of protons ($i={\rm p}$) and $\alpha$-particles  ($i=\alpha$) with initial kinetic energy 1~keV/amu for silicate (MgFeSiO$_4$) and carbon.}
\small%\centerline
{
\begin{tabular}{lcccc} \hline\hline\noalign{\smallskip}  
        & $l_{\rm p}$ & $l_{\rm \alpha}$ & $S^{(1)}_{\rm p}$      & $S^{(1)}_{\rm \alpha}$\\
        & [$\mu$m]    & [$\mu$m]         & [$10^{-15}$~eV cm$^2$] & [$10^{-15}$~eV cm$^2$]\\\hline
Silicate  & 0.071       & 0.17           & 25$^{a}$	  & 40$^{a}$    \\
Carbon  & 0.067       & 0.14            & 3.0$^{b}$	  & 5.9$^{c}$    \\ \hline
\end{tabular}}
\smallskip
 References: $^{{a}}$ \citet{ziegler2002}; $^{{b}}$ \citet{moller-et-al2002}; $^{{c}}$ \citet{mikheev-et-al1993}.
\end{table}