A theoretical study on electron-methylidyne collisions in the low and intermediate energy range

Abstract

In this work, we present a theoretical study on electron-methylidyne collisions in the low and intermediate energy range. More specifically, calculated elastic differential, integral and momentum transfer cross sections as well as grand total (elastic + inelastic) and absorption cross sections are reported in the 1-500 eV energy range. A complex optical potential is used to represent the electron-molecule interaction dynamics in the present calculation while the Schwinger variational iterative method combined with the distorted-wave approximation is used to solve the scattering equations. Comparison between the present absorption cross sections with the existing experimental and theoretical data for electron-impact ionization processes is encouraging.

Geometric shielding corrections for calculation of electron scattering by CO2, C2H2, CHCl3, CH2Cl2, CH3Cl, CHF3, CH2F2 and CH3F at 30–5000eV

“…In the past several decades, a number of theoretical approaches are proposed and developed, such as the Schwinger variational iterative method (Brescansin et al, 1998), the distorted-wave approximation method , the Schwinger multichannel method (Azevedo et al, 2000), the Schwinger variational iterative method combined with the distorted-wave approximation method (Lee et al, 2002), the complex Kohn variational method (Rescigno et al, 1999), the Born-closure Schwinger variational method , the R-matrix method (Bartschat et al, 1996), the close-coupling method (Kadyrov and Bray, 2002) and the ab initio method (Bhatia et al, 1993). Nevertheless, for polyatomic molecules over the intermediate-and high-energy range, since almost all inelastic channels (rotational, vibrational, electronic excitation and ionization process, etc.…”

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

“…For such energies, one observes a remarkable similarity among the DCS's for electron scattering from the four targets, as can be seen in figure 3. This similarity clearly indicates that the electron scattering interaction dynamics in the (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) eV energy range for these targets is dominated by the much heavier central carbon atom. Tables 3 and 4 show our ICS's and MTCS's, respectively, calculated for elastic e − -CH x (x = 1, 2, 3, 4) collisions in the (0.1-20) eV range.…”

“…More recently, Baluja et al [15] reported an R-matrix calculation of elastic and excitation cross sections for low-energy electron collisions with ClO. Also, theoretical studies for electron scattering by several radicals [16][17][18] have been reported by our group in recent past.…”

Electrical conductivity of a methane–air burning plasma under the action of weak electric fields

“…In [52], electron-methylidyne elastic collisions have been studied theoretically, combining the Schwinger variational iterative method and the distorted-wave approximation, using a complex optical potential. For the CH ionization, the theoretical binary-encounter-Bethe model cross section of [53] has been considered.…”