A theoretical study on elastic electron–CH_x(x= 1, 2, 3, 4) collisions in the low-energy range

Abstract

In this work, a theoretical study on elastic electron–CHx (x = 1, 2, 3, 4) collisions in the low-energy range is presented. More specifically, calculated elastic differential, integral and momentum transfer cross sections are reported in the (0.1–20) eV energy range. An optical potential formed by static, exchange and correlation–polarization contributions is used to represent the electron–target interaction, while the iterative Schwinger variational method is used to solve the scattering equations. Comparison of the calculated results for electron scattering by these targets shows an interesting trend.

Electron collisions with the BH2radical using theR-matrix method

“…Figure 1 shows the present calculated DCS at the incident energies of 0.5, 1.0, 2.0, 4.0, 6.0, and 8.0 eV, which is obtained by summing up all the rotationally elastic and inelastic DCS with J up to 5 for each incident energy. The large cross sections in the forward direction are due to the dipolar nature of the target [27], and the state-resolved cross sections (discussed below) show that the pure elastic (0 → 0) transition is responsible for the appearance of the minimum in the summed cross section in the medium scattering angle region (80 • -140 • ), which indicates the crucial role of the short-range interactions in the backward scattering region. To the best of our knowledge, experimental or theoretical DCS data for this molecule are still not available for comparison.…”