Influence of Repeller Potential on Ion-Molecule Reactions in H_2S and CH_4 Mixtures

• Authors: L. Wójcik , A. Markowski
• Languages of publication: EN

Abstracts

EN

Ion-molecule reactions initiated by electron impact in the hydrogen sulfide-methane mixtures have been studied by means of quadrupole mass spectrometer with a high-pressure ion source. The total gas pressure of investigated mixtures was changed from 0.7 to 33.3 Pa. Influence of repeller potential on ion-molecule reactions have been studied. The repeller potential was changed in the range 2-12 V. Measurements were performed for different concentrations of methane and hydrogen sulfide in the mixture (from 10% H_2S + 90% CH_4 to 90% H_2S + 10% CH_4 with 10% increment). The major ion-molecule reactions have been identified. The primary ions C^{+}, CH^{+}, CH_2^{+}, CH_3^{+}, CH_4^{+}, S^{+}, HS^{+}, H_2S^{+} produced in gas by the electrons with the energy of 300 eV and secondary CH_5^{+}, C_2H_5^{+}, H_3S^{+}, H_2^{34}S^{+}, H_3^{34}S^{+}, CHS^{+}, CH_3S^{+}, S_2^{+}, HS_2^{+}, H_2S_2^{+} and H_3S_2^{+} from the ion-molecule reactions were observed. Relative intensities for primary and secondary ions are presented as a function of potential of repeller electrode and concentration of methane in the mixture.

Keywords

EN

07.75.+h; 82.30.Fi

Discipline

• 82.30.Fi: Ion-molecule, ion-ion, and charge-transfer reactions(see also 34.70.+e Charge transfer in atomic and molecular collisions)
• 07.75.+h: Mass spectrometers(see also 82.80.Ms, 82.80.Nj, and 82.80.Rt in physical chemistry and chemical physics)

• Journal: Acta Physica Polonica A
• Year: 2011
• Volume: 120
• Issue: 1
• Pages: 13-15

Dates

published

2011-07

Contributors

author

L. Wójcik

• Institute of Physics, Maria Curie-Skłodowska University, pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland

author

A. Markowski

• Institute of Physics, Maria Curie-Skłodowska University, pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland

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Identifiers

DOI

10.12693/APhysPolA.120.13