Electron scattering by sulfur tetrafluoride (SF₄) molecules

Abstract

Absolute total cross section (TCS) for electron scattering from sulfur tetrafluoride (SF 4) molecules was measured in a linear transmission experiment at energies ranging from low (0.1 eV) to intermediate (370 eV). Below 1.6 eV the TCS function increases steeply towards lower energies and shows small resonant-like maximum near 0.4 eV. Two other distinct enhancements are located at higher energies: a narrow one is peaked at 12 eV, and a very broad hump is centred near 40 eV. Our experimental TCS results are compared with the previous TCS measurements at low impact energies and at intermediate energies-with our total cross section estimations based on calculations of elastic and ionization cross sections. The TCS for SF 4 is also compared with SF n (n = 1, 2, 6) total cross sections.

Total electron scattering cross section from sevoflurane by 1–300 eV energy electron impact

“…In addition, a closer inspection of Fig. 4 reveals some weak features visible between 5 and 10 eV and a broad hump centered within 30-50 eVwhich is the typical structure for fluorine rich targets [30]. Since there is currently no other available data in the literature to compare against for electron scattering from sevoflurane, this latter observation remains speculative.…”

Electron collision with sulfuryl chloride (SO2Cl2) molecule

“…For discussion and test purposes, we have also calculated ionization (ICS) and elastic cross sections (ECS) for SO 2 for which a more extensive data set of experimental and theoretical cross sections is available (cf [29]). The theoretical approach and computational methods used in the present calculations are nearly the same as those we have used in previous works [34][35][36][37]; thus, only a short description of applied procedures is provided here.…”

“…Finally, we have estimated the total cross section for electron scattering from SO 2 , SO 2 Cl 2 and SO 2 F 2 molecules as a sum of the calculated ionization and elastic cross sections. It is worth noting that the approach used in the present work has been recently employed successfully to reproduce the total cross sections for electron scattering from NF 3 [26], SO 2 ClF [34] and SF 4 [37] molecules, at energies above 70 eV.…”

Division Xii / Commission 14 / Working Group Collision Processes

“…For molecules, new elastic scattering references have appeared as follows: C 3 (Munjal & Baluga 2006); CH 4 (Cho et al 2008); H 2 CO (Kaur & Baluja 2005); C 6 H 6 , C 6 F 6 , C 6 H 12 , C 6 H 14 , C 6 F 14 , C 8 H 16 , C 8 H 18 , and C 8 F 18 (Shi et al 2008); SF 4 (Szmytkowski et al 2005); SO 2 Cl 2 (Szmytkowski et al 2006); SiN 2 , SiCO, and CSiO (Fujimoto et al 2007); pyrazine (Winstead 2007); propane (Bettega, da Costa, & Lima 2008); methanol and ethanol (Khakoo et al 2008); propene and cyclopropane (Makochekanwa et al 2008); and NeF (Kaur et al 2008 ); CF 4 (Irrera & Gianturco 2005); N 2 (Tashiro & Morokuma 2007, Khakoo et al 2007, ethene (Allan, Winstead, & McKoy 2008); and NeF (Kaur et al 2008). …”

“…For molecules, new elastic scattering references have appeared as follows: C 3 (Munjal & Baluga 2006); CH 4 (Cho et al 2008) (Shi et al 2008); SF 4 (Szmytkowski et al 2005); SO 2 Cl 2 (Szmytkowski et al 2006); SiN 2 , SiCO, and CSiO (Fujimoto et al 2007); pyrazine (Winstead 2007); propane (Bettega, da Costa, & Lima 2008); methanol and ethanol (Khakoo et al 2008); propene and cyclopropane (Makochekanwa et al 2008); and NeF (Kaur et al 2008).…”