High-temperature mass spectrometric determinations of relative ionization cross-sections of gaseous TiO, TiO2, VO, VO2, YO, HfO and GeO molecules
Article first published online: 1 OCT 2013
Copyright © 2013 John Wiley & Sons, Ltd.
Rapid Communications in Mass Spectrometry
Volume 27, Issue 21, pages 2338–2342, 15 November 2013
How to Cite
Lopatin, S. I., Shugurov, S. M. and Emelyanova, K. A. (2013), High-temperature mass spectrometric determinations of relative ionization cross-sections of gaseous TiO, TiO2, VO, VO2, YO, HfO and GeO molecules. Rapid Commun. Mass Spectrom., 27: 2338–2342. doi: 10.1002/rcm.6702
- Issue published online: 1 OCT 2013
- Article first published online: 1 OCT 2013
- Manuscript Accepted: 1 AUG 2013
- Manuscript Revised: 11 JUL 2013
- Manuscript Received: 31 MAY 2013
Accurate values of electron ionization cross-sections of high-temperature vapor species are of importance in mass spectrometric investigations as well as in a variety of other fields. However, the present experimental techniques are subject to many inherent difficulties or are limited in applicability and so far have yielded relatively few reliable values. Theoretical calculations are not sufficiently accurate. So the need for experimental ionization cross-section data for these species is very important.
Measurements were performed by high-temperature Knudsen effusion mass spectrometry with a MS-1301 mass spectrometer. Vaporization was carried out using molybdenum effusion cells containing samples of pure Au, V2O3, Ti3O5, GeO2 and Y2O3-HfO2 systems.
The VO, VO2, TiO, TiO2, YO, HfO and GeO vapor species were identified over the samples studied. The partial pressures of Au and the oxides were measured by a complete isothermal vaporization method. The relative ionization cross-sections σAu/σi were determined for the gaseous oxides studied. The results were compared with the literature data.
The inapplicability of the 'additivity rule' is shown. This finding is in good agreement with a tendency to changing ionization cross-sections in the Periodic Table row of gaseous M, МО and МО2 species. Copyright © 2013 John Wiley & Sons, Ltd.