TOF MS Study of Photodissociation of Borazine at 193 nm

Photofragmentation of borazine molecule has been investigated in a supersonic molecular beam condition (Ar + 1{\%} borazine mixture) by using radiation of 193 nm (250 mJ/pulse). Fragments were photo ionized using another laser (193 nm, 3 mJ/pulse) and detected by a linear time-of-flight mass spectrometer. Both lasers passed through the work area of the TOF mass spectrometer at the same time. We found that the main channel of borazine photofragmentation is formation of B$_{3}$N$_{3}$H$_{5 }$radical and hydrogen atom. The possible mechanism was proposed and discussed.