The distribution of charge fluctuations during current flow through a
region with an alternating field which causes an inelastic scattering
is analyzed. The distribution is formed by several independent Bernoul
li random processes in which the frequencies of attempts are found as
a function of the potential difference and the field frequency. The in
dependent outcomes in one attempt correspond to a coherent passage of
several electrons. The probabilities for the outcomes are expressed in
terms of multiparticle scattering amplitudes.