Electron-energy dependence of the S2F10mass spectrum
- 14 September 1989
- journal article
- letter
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 22 (9) , 1399-1401
- https://doi.org/10.1088/0022-3727/22/9/027
Abstract
The positive-ion mass spectrum of S2F10 has been measured as a function of electron-impact energy in the range 20-70 eV using a quadrupole mass spectrometer. Contrary to recent results reported by Farber and co-workers from mass spectrometric analysis of arc-decomposed SF6 there was no evidence of S2F9+ or S2F10+ ion formation from S2F10 at any energy. The largest ion observed at all electron energies is SF5+. It was found, however, that the appearance potentials for SF5+ and SF3+, the two most prominent ions from S2F10, are significantly lower than the appearance potentials of these same ions from SF6. The differences between the mass spectra of S2F10 and SF6 are delineated and the implications for detection of S2F10 in the presence of SF6 are discussed.Keywords
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