Theoretical and experimental investigation of electron collisions with dimethyl sulfide

Abstract

We report a joint theoretical-experimental investigation of elastic electron scattering by dimethyl sulfide in the low-and intermediate-energy regions. More specifically, experimental differential, integral, and momentumtransfer cross sections are given in the 30-800 eV and 10°-130° ranges. Theoretical cross sections are reported in the 1-500 eV interval. The experimental differential cross sections were determined using a crossed electronbeam-molecular-beam geometry, whereas the absolute values of the cross sections were obtained using the relative-flow technique. Theoretically, a complex optical potential was used to represent the collision dynamics, and a single-center expansion method combined with the Pade approximant method was used to solve the scattering equations. Our experimental data are in good agreement with the present calculated data but strongly disagree with those reported in a previous investigation.

Electron scattering studies of DMS, DMDS and DMSO homologous series

“…The present Q el data is in excellent agreement with the measurements and theoretical calculations of Rao et al [9]. However, both experimental and theoretical values of Homem et al [10] have higher values than the present Q el curve at energies beyond 50 eV. The reason for this discrepancy is unknown and has not been mentioned by Homem et al [10].…”

“…To the best of our knowledge, there are no experimental or theoretical studies relating to electron-induced ionisation and total cross sections for targets under present study. A discrepancy is found to exist among the data-set reported by Homem et al [10] with the present elastic cross sections and Rao et al's [9] values for DMS molecule. The reason for such disagreement is unknown.…”

“…However, both experimental and theoretical values of Homem et al [10] have higher values than the present Q el curve at energies beyond 50 eV. The reason for this discrepancy is unknown and has not been mentioned by Homem et al [10]. Moreover, the overall uncertainties in ICS estimated by Homem et al [10] are as high as 25% at 50 and 800 eV and 20% elsewhere.…”

“…The reason for this discrepancy is unknown and has not been mentioned by Homem et al [10]. Moreover, the overall uncertainties in ICS estimated by Homem et al [10] are as high as 25% at 50 and 800 eV and 20% elsewhere. Figure 6 presents the Q el curve for e-DES and e-DPS scattering.…”

“…Rao et al [9] reported both experimental and theoretical data for DMS and DMSO molecules. Homem et al [10] also investigated electron scattering from DMS molecules experimentally and theoretically. For the remaining molecules, there is no data available for comparison.…”