Dissociation dynamics of B 1s core-excited BF 3 probed by energy-selected electron — energy-selected ion coincidence and angle-resolved ion spectroscopy

Abstract

A coincidence study between energy-selected electrons and mass- and energy-selected ions shows that dissociation from the spectator-Auger-final states both above and below the double ionization threshold produces energetic B + whereas dissociation following B 1 s ionization produces energetic F +. An angle-resolved photoion study reveals that the B + is ejected from the spectator-Auger-final states of the deformed C 3 v pyramidal molecule, after the neutral F ejection but before the free molecular rotations, whereas the B + ejection following the B 1 s ionization is within the D 3 h plane of the parent molecule.