Mass Spectrometric Study of Positive Ion-Molecule Reactions in the C₃H₆and Ar Mixtures Inside the High Pressure Ion Source

Abstract

Ionmolecule reactions have been measured for the propeneargon mixtures of dierent compositions using a quadrupole mass spectrometer with a high-pressure ion source. The concentration of propane in these mixtures ranged from 10% to 90% (at 10% increment). The following primary and secondary ions: CH Relative ion current intensities for primary and secondary ions are presented as a function of both total mixtures pressure and concentration of propene in the mixture. Primary ions were produced by electrons with the energy of 300 eV. The potential of repeller electrode VR inside the ion source collision chamber was xed at 5 V for all measurements. The total mixture pressure was changed from 0.7 to 26.6 Pa. Schemes of ionmolecule reactions were proposed.