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Low-energy electron elastic scattering by \(\hbox {SF}_6\)—modified effective range analysis

  • Regular Article - Atomic and Molecular Collisions
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Abstract

Cross sections for electron elastic scattering on sulfur hexafluoride (\(\hbox {SF}_6\)) are analyzed at ultra-low energies (below 1eV) using the semi-analytical approach to the modified effective range theory (MERT). It is shown that currently available experimental elastic cross sections are consistent with each other within the frame of this theoretical approach in the energy range 0.2–1 eV, i.e., when the coupling of elastic and electron attachment channels is relatively low. The MERT analysis also indicates the presence of the Ramsauer–Townsend effect in p-wave around 0.5 eV. To describe cross sections at energies lower than 0.2 eV, where the electron attachment plays a significant role, MERT is combined with the simple coupled model (SCM). The partial wave phase shifts extrapolated towards the zero energy suggest a virtual state scattering. The comparison between MERT and SCM results allows estimating the importance of the channel coupling effect at near-zero energies.

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Data Availability Statement

This manuscript has no associated data in a data repository. [Authors comment: All relevant data regarding this work is presented in the paper itself. The tabulated cross sections are available under request.]

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  1. Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5/7, 87-100, Toruń, Poland

    Kamil Fedus

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Fedus, K. Low-energy electron elastic scattering by \(\hbox {SF}_6\)—modified effective range analysis. Eur. Phys. J. D 76, 55 (2022). https://doi.org/10.1140/epjd/s10053-022-00383-w

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