\begin{table}%t9
\caption{$\alpha$ values ($10^{-17}$ cm$^{3}$ s$^{-1}$) for rough amorphous      carbon.}\label{alpha r carbon}
%\centering
\small
\begin{tabular}{l c c c c c c c}\hline \hline
$f/f_{0}$    & 10 K     & 15 K & 20 K & 25 K & 30 K & 35 K & 40 K \\ \hline 
1   & 0.37    & 7.3 & 8.2 & 8.6 & 7.2 & 0.099 & 3.5E-04\\ 
2   & 0.19    & 7.2 & 8.1 & 8.5 & 7.6 &  0.19 & 6.5E-04\\ 
3   & 0.13    & 7.2 & 8.0 & 8.5 & 7.7 &  0.29 & 1.0E-03\\ 
4   & 0.099   & 7.1 & 8.0 & 8.5 & 7.8 &  0.37 & 1.2E-03\\ 
5   & 0.081   & 7.1 & 8.0 & 8.5 & 7.9 &  0.46 & 1.7E-03\\ 
6   & 0.067   & 7.1 & 7.9 & 8.5 & 7.9 &  0.54 & 2.2E-03\\ 
7   & 0.056   & 7.1 & 7.9 & 8.4 & 7.9 &  0.61 & 2.5E-03\\ 
8   & 0.051   & 7.1 & 7.9 & 8.4 & 7.9  & 0.69 & 2.9E-03\\ 
9   & 0.044   & 7.1 & 7.9 & 8.4 & 8.0 &  0.77 & 3.2E-03\\ 
10  & 0.040   & 7.1 & 7.9 & 8.4 & 8.0 &  0.83 & 3.6E-03\\ 
15  & 0.028   & 7.1 & 7.9 & 8.4 & 8.0 &  1.1 & 5.4E-03\\ 
20  & 0.020   & 7.1 & 7.8 & 8.4 & 8.0 &  1.4 & 7.0E-03\\ 
25  & 0.017   & 7.0 & 7.8 & 8.3 & 8.0 &  1.7 & 9.1E-03\\ 
30  & 0.013   & 7.0 & 7.8 & 8.3 & 8.0 &  1.9 & 1.1E-02\\ \hline
\end{tabular}
\end{table}