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. (C) 2011 Elsevier B.V. All rights reserved.