Vibrationally resolved states in the HS fragment studied by means of electron-excited Auger spectroscopy.

An autoionization spectrum of the ${\mathrm{H}}_{2}$S molecule has been identified from the comparison between the Auger electrons recorded by means of high-resolution electron-beam and monochromatic Al K\ensuremath{\alpha} exciting sources. Due to the high energy resolution the measured kinetic energies can be used for a precise assignment. Our results support a model of a fast dissociation of the core-excited ${\mathrm{H}}_{2}$${\mathrm{S}}^{\mathrm{*}}$ (2p${)}^{\mathrm{\ensuremath{-}}1}$(6${\mathit{a}}_{1}$${)}^{1}$ and (2p${)}^{\mathrm{\ensuremath{-}}1}$(3${\mathit{b}}_{2}$${)}^{1}$ states into core-excited ${\mathrm{HS}}^{\mathrm{*}}$ (2p${)}^{\mathrm{\ensuremath{-}}1}$(2\ensuremath{\pi}${)}^{4}$ followed by autoionization decay into the ${\mathrm{HS}}^{+}$ radical. Vibrational structures are resolved and assigned to the $^{3}\mathrm{\ensuremath{\Sigma}}^{\mathrm{\ensuremath{-}}}$ and $^{1}\mathrm{\ensuremath{\Delta}}$ final states in the ${\mathrm{HS}}^{+}$ radical. No participator Auger process in ${\mathrm{H}}_{2}$${\mathrm{S}}^{\mathrm{*}}$ could be identified. However, contributions from the spectator process in ${\mathrm{H}}_{2}$${\mathrm{S}}^{\mathrm{*}}$ might be present.