Cross sections for electron collisions with dimethyl ether

Abstract

We report a joint theoretical-experimental investigation of electron collision with dimethyl ether (DME) in the low-and intermediate-energy ranges. Experimental absolute differential, integral, and momentum-transfer cross sections for elastic e − -DME scattering are reported in the 100-1000 eV energy range. Our measurements were performed using a crossed electron-beam-molecular-beam geometry. The angular distribution of the scattered electrons was converted to absolute cross section using the relative flow technique. Theoretically, elastic differential, integral, and momentum-transfer cross sections, as well as the grand-total and total absorption cross sections for electron collision with DME are calculated in the 1-1000 eV energy range. A single-center-expansion technique combined with the Padé approximant method is used in our calculations. A comparison between the present experimental and theoretical data shows very good agreement. Moreover, comparison with theoretical and experimental data for e − -ethanol (an isomer of DME) scattering shows interesting isomeric effects.

Low-Energy Electron Scattering from Dimethyl Ether

“…are shown. Except for 1 eV, present results match the shape, but the magnitude is much higher.The present cross section is 3–7 times higher than the results of Sugohara et al . Their cross sections are compared to the experimental data for ethanol, and good matching is found between the two cross sections.…”

“…Significant difference in magnitude can be seen only below 1 eV; however, the shape of the cross section remains the same. In Figure , present results along with the lone comparison of Sugohara et al . are shown.…”

“…Literature survey reveals that there is limited data available for DME. Only two articles , dedicated to electron scattering studies of DME are found. Sugohara et al .…”

Theoretical and experimental investigation of electron collisions with acetone

“…Measurements of the scattered-electron intensities were performed using a crossed electron-beam-molecular-beam geometry with the same procedure and experimental setup presented in our previous works [22][23][24][25][26][27][28]. The electron source used in our setup provides a beam in the 30-1000 eV range.…”

Electron collisions with ammonia and formamide in the low- and intermediate-energy ranges

“…Thus electron interaction with such molecules which form building blocks of large biomolecules has attracted considerable attention in recent years [1,2]. In the near past, several small biomolecules such as methanol [3], ethanol [4], propane [5], and dimethylether [6] were investigated both theoretically and experimentally by our group. In this work, we present a study of electron collisions with two nitrogen-containing compounds, namely ammonia (NH 3 ) and formamide (NH 2 CHO).…”