Electron impact ionization cross-sections of carbonyl sulfide molecule

Single differential cross-sections as a function of secondary electron energy for the production of the COS+, S+, CO+, CS+, O+ and C+ ions resulting from dissociative ionization of the COS molecule by electron impact have been evaluated at fixed incident electron energies 100 and 200 eV employing a semi-empirical formalism. The partial ionization cross-sections corresponding to the positive charged ions are derived from the differential cross sections in the energy range varying from the ionization threshold to 1000 eV. In absence of any experimental and/or theoretical data, as a testimony the sum of partial ionization cross sections are compared with the available data which revealed a satisfactory agreement. In addition to the cross sections, ionization rate coefficients as a function of energy/temperature have also been evaluated by using partial ionization cross-sections and Maxwell–Boltzmann distribution of energy.

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► Electron-impact ionization plays an important role in many areas of chemistry and physics, including mass spectrometry, plasma processes and gas discharges. Accurate ionization cross sections are important for understanding the mechanism of the ionization process, and are also required for modeling applications, ranging from studies of fusion plasmas to investigations into radiation effects in materials science and medicine.
► In this work we have calculated partial single differential cross-sections, partial integral ionization cross-sections and their total with rate coefficients for partial ionization cross-sections by M-B equation.
► Our results shows good agreement with available data for total ionization cross-sections where as no results are available for the single differential cross-sections and partial ionization cross-sections.
► We have employed modified Jain-Khere semi empirical formula which requires oscillator strength data as input.