Metastable atomic ion production in electron-O 2 collisions

Corr, J J; Khakoo, M. A.; McConkey, A G; McConkey, J W

doi:10.1016/j.ijms.2014.11.002

Cited by 5 publications

(2 citation statements)

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“…The data for the excitation function of total O + ions and metastable O + ions produced in e+O 2 collisions, from threshold to 450 eV energy interval, are presented in Ref. [58]. The authors observed interesting but surprising results: the cross section for the ion production in the ground and metastable states falls off more slowly than metastable ions as the electron energy increases to energies larger than 150 eV.…”

Section: Resultsmentioning

confidence: 99%

“…Although production of metastable O + ions was confirmed, no information regarding the influence of the pressure condition in the ion source on the formation of metastable O + was presented in Refs. [56][57][58]. We address this situation by performing measurements with variable electron energy and pressure condition in the ion source using our approach.…”

Section: Resultsmentioning

confidence: 99%

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Electron-impact ionization and ionic fragmentation of O$_{2}$ from threshold to 120 eV energy range

Lomsadze,

Gochitashvili,

Kezerashvili

et al. 2020

Preprint

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We study the electron-impact induced ionization of O2 from threshold to 120 eV using the electron spectroscopy method. Our approach is simple in concept and embodies the ion source with a collision chamber and a mass spectrometer with a quadruple filter as a selector for the product ions. The combination of these two devices makes it possible to unequivocally collect all energetic fragment ions formed in ionization and dissociative processes and to detect them with known efficiency. The ion source allows to vary and tune the electron-impact ionization energy and the target-gas pressure. We demonstrate that for obtaining reliable results of cross sections for inelastic processes and determining mechanisms for the formation of O + ( 4 S, 2 D, 2 P ) ions, it is crucial to control the electron-impact energy for production of ion and the pressure in the ion source. A comparison of our results with other experimental and theoretical data shows good agreement and proves the validity of our approach.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%