**Table 4:** Line widths (in keV) for various positron annihilation processes.
$\begin{table}\begin{displaymath} \begin{array}[b]{lcccc} \hline \hline \mbox{... ...ains}& 2.0 & 2.0 & 2.0 & 2.0 \\ \hline \end{array}\end{displaymath}\end{table}$

	1 Introduction
	2 In-flight processes
	3 Processes after thermalization
	4 Annihilation spectra
	5 Summary and conclusions
	References