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In this work, we report on a theoretical study of electron-CS2 collision in the low- and intermediate-energy range. More specifically, the elastic differential and integral cross sections as well as the grand total (elastic+inelastic) cross sections in the 0.05-100 eV range are reported. A complex optical potential consisting of static, exchange, correlation-polarization plus absorption contributions, derived from a fully molecular wavefunction, is used for the electron-molecule interaction. The Schwinger variational iterative method combined with the distorted-wave approximation are applied to calculate the scattering amplitudes. The comparison between the calculated results and the existing experimental and theoretical results is encouraging.

In this paper, we report a joint theoretical-experimental study on electron-OCS collisions in the low-and intermediate-energy ranges. More specifically, elastic differential and integral cross sections, as well as grand total (elastic + inelastic) cross sections in the 0.4-600 eV energy range, are reported. A complex optical potential consisting of static, exchange, correlationpolarization plus absorption contributions, derived from a fully molecular wavefunction, is used for the electron-molecule interaction. The Schwinger variational iterative method, combined with the distorted-wave approximation, is applied to calculate the scattering amplitudes. Additionally, we also report measured elastic differential and integral cross sections in the 100-600 eV energy range determined using the relative-flow technique. Comparison between calculated results and present and existing experimental data, as well as with other theoretical results, is encouraging.

Recently we made calculations of differential and integral cross sections for the X1A1 to 3A1(3a1 to 3sa1) transition in H2O in the energy range of 12-30 eV, where the distorted-wave approximation was applied for the first time to study the electronic excitation of a nonlinear polyatomic target by electron impact. In the present work we make an extension of this calculation for that transition to the energy range 40-150 eV. Calculations of cross sections for the X1A1 to 3A1(3a1 to 3pa1) transition in the energy range 14-150 eV are also reported. The present study is the first theoretical investigation of electron-impact excitation of the channel 3a1 to 3pa1 in this nonlinear molecule.

In this work, we present a theoretical study of elastic and inelastic electron - collisions in the low and intermediate incident energy range. More specifically, we report differential and integral cross sections for the elastic scattering in the 5 to 80 eV range as well as the excitation cross sections for the transitions leading to the lowest and states in the 10 to 100 eV range. The Born-closure Schwinger variational method was applied for the elastic scatterings whereas the distorted-wave method was used to study the electron impact excitation processes. The calculations were carried out using the fixed-nuclear static-exchange approximation at the equilibrium geometry of the ground-state . The comparison between the calculated results and the available experimental data in the literature is encouraging. .

The method of continued fractions (MCF) of Horáček and Sasakawa is applied for the first time to the study of low-energy electron scattering by linear molecules at the twostate close-coupling level. In particular, we have calculated the excitation cross sections for the transition X 1 + g → b 3 + u in H 2 for incident energies from near threshold to 40 eV. In contrast to the early two-state studies of Chung and Lin, in this work no orthogonality constraint between the bound and continuum orbitals is imposed and the one-electron exchange terms are considered explicitly. The calculated cross sections are in very good agreement with the available experimental data and with some recent theoretical results.

We report a theoretical study of elastic electron-O 3 collisions in the 3-80 eV energy range. Calculations are carried out in a fixed-nuclei approximation at the ground-state equilibrium geometry of ozone. The Schwinger variational iterative method is used to calculate the low partial-wave scattering amplitudes at the static-exchange level whereas higher partialwave contributions were taken into account through a Born-closure procedure using a pointdipole potential. The results presented are compared with available experimental and theoretical data in the literature and results are encouraging.

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