Influence of Repeller Potential on Ion-Molecule Reactions in H2S and CH4 Mixtures |
| L. Wójcik and A. Markowski
Institute of Physics, Maria Curie-Skłodowska University, pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland |
| Full Text PDF |
| 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% H2S + 90% CH4 to 90% H2S + 10% CH4 with 10% increment). The major ion-molecule reactions have been identified. The primary ions C+, CH+, CH2+, CH3+, CH4+, S+, HS+, H2S+ produced in gas by the electrons with the energy of 300 eV and secondary CH5+, C2H5+, H3S+, H234S+, H334S+, CHS+, CH3S+, S2+, HS2+, H2S2+ and H3S2+ 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. |
| DOI: 10.12693/APhysPolA.120.13 PACS numbers: 07.75.+h, 82.30.Fi |