  The advent of ultrashort soft x-ray pulse sources permits the use of
established gas phase spectroscopy methods to investigate ultrafast
photochemistry in isolated molecules with element and site specificity. In the
present study, we simulate excited state wavepacket dynamics of a prototypical
process, the ultrafast photodissociation of methyl iodide. Based on the
simulation, we calculate time-dependent excited state carbon edge photoelectron
and Auger electron spectra. We observe distinct signatures in both types of
spectra and show their direct connection to C-I bond dissociation and charge
rearrangement processes in the molecule. We demonstrate at the CH$_3$I molecule
that the observed signatures allow us to map the time-dependent dynamics of
ultrafast photo-induced bond breaking with unprecedented details.
