  The electron assisted low energy $dd$ reactions in deuterized metals are
investigated. It is shown that if a metal is irradiated with slow, free
deuterons then the $e+d+d\rightarrow e^{\prime }+p+t$ and $e+d+d\rightarrow
e^{\prime }+n+$ $^{3}He$\ electron assisted $dd$ processes will have measurable
probabilities even in the case of slow deuterons. The cross sections and the
yields in an irradiated sample are determined. The results are associated with
the so called anomalous screening effect. It is concluded that the electron
$dd$ processes have to be taken into account when evaluating the experimental
data of low energy fusion reactions in metals.
