エネルギーフィルター付き四極子形質量分析計の評価 [in Japanese] Evaluation of the Performance of the Quadr Upole Mass Spectrometer with the Bessel-Box Type Energy Analyzer [in Japanese]
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The discrimination between the non-dissociative molecular ions and the fragment ions is one of the important factors for the quantitative measurements of partial pressures by a quadrupole mass spectrometer (QMS). The measurements of H<SUB>2</SUB>, CH<SUB>4</SUB>, and O<SUB>2</SUB> by QMS with the Bessel-Box type energy analyzer show that the energy spectrum of the molecular ion and of the fragment ion at the same mass to charge ratio are very different each other. The difference can be applied for the distinction between the molecular ions and the fragment ion.<BR>Furthermore, the spectra of fragment ions depend on their parent molecular ions probably due to the different dissociation process of molecules by the electron bombardment.
- Journal of the Vacuum Society of Japan
Journal of the Vacuum Society of Japan 43(3), 231-234, 2000-03-20
The Vacuum Society of Japan