  A time-dependent approach for the kinetic energy release (KER) spectrum is
developed for a fragmentation of a diatomic molecule after an electronic decay
process, e.g. Auger process. It allows one to simulate the time-resolved
spectra and provides more insight into the molecular dynamics than the
time-independent approach. Detailed analysis of the time-resolved emitted
electron and KER spectra sheds light on the interrelation between wave packet
dynamics and spectra.
