Selective Dissociative Ionization of SiH4, Si2H6 and Si3H8 by Electron Impact in Supersonic Free Jets

Abstract
Low-energy (E=10-14 eV) electron-impact decomposition of SiH4, Si2H6, and Si3H8 into ionic species in a pulsed supersonic free jet has been investigated using quadrupole mass spectrometry. Si+ was the common primary dissociated product for E≤13 eV, while at E=14 eV, SiH2 + and SiH3 + became the primary species in the dissociation of SiH4 and Si2H6, respectively.