This paper reports computational results of the total cross sections for electron impact on H 2 CO and HCOOH over a wide range of electron impact energies from 0.01 eV to 2 keV. The total cross section is presented as sum of the elastic and electronic excitation cross sections for incident energies. The calculation uses two different methodologies, below the ionization threshold of the target the cross section is calculated using the UK molecular R-matrix code through the QUANTEMOL-N software package while cross sections at higher energies are evaluated using the spherical complex optical potential formalism. The two methods are found to be consistent at the transition energy (∼15 eV). The present results are, in general, found to be in good agreement with previous experimental and theoretical results (wherever available) and, thus, the present results can serve as a benchmark for the cross section over a wide range of energy.
In this paper we report calculations of the total ionization cross sections, Qion, for environmentally sensitive molecules, namely CO, CO2, CS, OCS, CS2 and S2, upon electron impact for energies from circa threshold to 5000 eV. Spherical complex optical potential (SCOP) formalism is employed to evaluate total inelastic cross sections, Qinel. Total ionization cross sections, Qion, are extracted from the total inelastic cross sections, using a semi-empirical formalism developed by us, called the ‘complex spherical potential-ionization contribution’ (CSP-ic) method. The present results are compared with both theoretical and experimental data available in the literature and overall good agreement is observed for all the reported molecules.
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