Cross sections for electron scattering by ethane in the low- and intermediate-energy ranges

Abstract

We present a joint theoretical-experimental study on electron scattering by ethane (C 2 H 6 ) in the low-and intermediate-energy ranges. Calculated elastic differential, integral and momentum transfer as well as total (elastic + inelastic) and total absorption cross sections are reported for impact energies ranging from 1 to 500 eV. Also, experimental absolute elastic cross sections are reported in the 40-500 eV energy range. A complex optical potential is used to represent the electron-molecule interaction dynamics. A theoretical method based on the single-centre-expansion close-coupling framework and corrected by the Padé approximant technique is used to solve the scattering equations. The experimental angular distributions of the scattered electrons are converted to absolute cross sections using the relative flow technique. The comparison of our calculated results with our measured results, as well as with other experimental and theoretical data available in the literature, is encouraging.

Differential elastic electron scattering by pentane

“…We also observe that the SEP values from pentanol follow those of pentane, except that the permanent dipole of pentanol produces a somewhat more pronounced forward peak at E 0 = 5 and 10 eV. Above the ionization potential, this is [46]; Mapstone and Newell [47], × Curry and Newell [48], Merz and Linder [49], ♦ Rawat et al [9], and Fink et al [50]. Propane: Boesten et al [10] and Souza et al [12].…”

“…Ignition and reaction chemistry involving excitation, dissociation, and ionization of these molecules in combustion (plasma) processes in automobile engines [3] is governed or catalyzed by energetic electron scattering from these fuel species in the energy region which ranges from 0.1 eV to high energies (>100 eV), but with a maximum around 10 eV [4]. Whereas there exist electron impact data on methane [5][6][7], ethane [8,9], propane [10][11][12], and butane [13], and in references cited within these, there is lack of electron collision data for pentane. The few data available for pentane are those by Freeman et al [14] of total electron cross sections determined from the mobility of electrons in liquid pentane at the energies of 0.1 to 0.5 eV using a time-of-flight method and those by Kimura et al [15] of gaseous pentane of total cross sections for this target.…”

Absorption effects in electron–sulfur-dioxide collisions

“…In the present work, a modified version of the quasifree scattering model (QFSM) of Staszewska et al [50], known as the scaled quasifree scattering model (SQFSM) [49,51], is used to account for the absorption effects. The SQFSM has already been successfully applied to investigate electron collisions on several targets [49,[51][52][53][54][55]. Also recently, in a benchmark study Staszewska et al [56] confirmed the effectiveness of the SQFSM in describing electron-atom scattering.…”

Cross sections for electron collisions with dimethyl ether

“…In the recent past, this method was successfully applied by our group to treat electron collisions with ethane, propane, and pyrimidine [20][21][22]. In this work, we extend its application to DME.…”