A joint theoretical and experimental study for elastic electron scattering from 1,4-dioxane

Abstract

We present results of measurements and calculations of elastic electron scattering from 1,4-dioxane in the energy range of 0-1000 eV. Absolute differential and integral elastic cross sections have been measured using a crossed electron-molecule beam spectrometer and the relative flow technique, at four energies in the 10-30 eV range and for scattered electrons in the angular range 20• -129• . The measured cross sections are compared with results from R-matrix computations, at the static exchange plus polarization level, calculated at energies between 0-20 eV, and with calculations employing the independent atom model with the screening corrected additivity rule (IAM-SCAR). Those latter computations were conducted at energies between 1 and 1000 eV. Agreement between the measured and R-matrix cross sections was typically found to be good at all common energies, whereas agreement with IAM-SCAR was satisfactory only at 30 eV. To the best of our knowledge, the present results are the first absolute data to be published in the literature for this scattering system.

Integral cross sections for electron impact excitation of vibrational and electronic states in phenol

“…With that approach, the IAM-SCAR has been known to provide a good description of the scattering process down to ∼20 eV for some molecules. [33][34][35] On the other hand, there are other systems [36][37][38] where the IAM-SCAR approach results do not agree well with the measured cross sections at even 50 eV, so that caution in its application must still be exercised.…”

The electron-furfural scattering dynamics for 63 energetically open electronic states

“…Our approach to accomplish this, built around a generalised for elastic scattering (green -· -· -), total inelastic scattering (purple -) and the total cross section (TCS) (thin black -) in furfural. Also shown are a rotational ICS using a Born-dipole approach [21][22][23][24][25][26] (red ----), and a total ionization cross section from a BEB calculation (grey -· -). 33 The sum of the available measured electronic-state ICSs (this work), vibrational ICSs, 6 and their sum is also shown, as is the TICS + discrete excitations sum.…”

“…Note that this follows on from a similarly extensive study on phenol, [15][16][17][18][19][20] another important by-product from the application of atmosphericpressure plasmas to biomass. While our independent atom model with screening corrected additivity rule (IAM-SCAR) calculations have had some success, in describing the electron scattering process down to energies (E 0 ) ∼ 20 eV with some molecules, [21][22][23] there are other systems [24][25][26] where this approach does not yield cross sections that are in agreement with measured data for energies as high as 50 eV. In response to this, at least in part, Blanco and García 27 recently extended their IAM-SCAR approach to account for multi-centre scattering (i.e., interference (I)) effects (thus now known as the IAM-SCAR+I method).…”

Integral elastic, electronic-state, ionization, and total cross sections for electron scattering with furfural

“…While our independent atom model with screening corrected additivity rule (IAM-SCAR) calculations have had some success, in describing the electron scattering process down to energies (E 0 ) ∼ 20 eV with some molecules, [21][22][23] there are other systems [24][25][26] where this approach does not yield cross sections that are in agreement with measured data for energies as high as 50 eV. In response to this, at least in part, Blanco and García 27 recently extended their IAM-SCAR approach to account for multi-centre scattering (i.e., interference (I)) effects (thus now known as the IAM-SCAR+I method).…”