Novel experimental setup for time-of-flight mass spectrometry ion detection in collisions of anionic species with neutral gas-phase molecular targets

EPJ Techniques and Instrumentation
J C OllerG García

Abstract

We report a novel experimental setup for studying collision induced products resulting from the interaction of anionic beams with a neutral gas-phase molecular target. The precursor projectile was admitted into vacuum through a commercial pulsed valve, with the anionic beam produced in a hollow cathode discharge-induced plasma, and guided to the interaction region by a set of deflecting plates where it was made to interact with the target beam. Depending on the collision energy regime, negative and positive species can be formed in the collision region and ions were time-of-flight (TOF) mass-analysed. Here, we present data on O2 precursor projectile, where we show clear evidence of O(-) and O2 (-) formation from the hollow cathode source as well as preliminary results on the interaction of these anions with nitromethane, CH3NO2. The negative ions formed in such collisions were analysed using time-of-flight mass spectrometry. The five most dominant product anions were assigned to H(-), O(-), NO(-), CNO(-) and CH3NO2 (-).

References

Mar 5, 2009·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Andrey V Solov'yovWalter Greiner
Sep 18, 2009·Nature·Léon Sanche
Aug 20, 2010·Physical Chemistry Chemical Physics : PCCP·R AntunesP Limão-Vieira
Jul 29, 2011·Physical Chemistry Chemical Physics : PCCP·D AlmeidaP Limão-Vieira
Nov 11, 2011·Physical Chemistry Chemical Physics : PCCP·F Ferreira da SilvaP Limão-Vieira
Feb 7, 2013·Physical Review Letters·Diogo AlmeidaPaulo Limão-Vieira

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Citations

Aug 22, 2018·European Journal of Psychotraumatology·Evgenia MilmanS Robin Cohen
Feb 10, 2018·The Journal of Physical Chemistry. a·A JorgeI Rabadán

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