Elastic electron scattering from methane at high momentum transfer

M. Vos*, M. R. Went, G. Cooper, C. A. Chatzidimitriou-Dreismann

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    20 Citations (Scopus)

    Abstract

    We describe elastic electron scattering data at high momentum transfer (between ≈20 and ≈40 au) from methane and Xe. Under these conditions there is a significant recoil energy transferred to the target and electrons scattered elastically from methane are separated into two peaks: one due to electrons scattered from carbon, and one due to electrons scattered from hydrogen. The separation of these peaks is within a few per cent identical to what is expected for scattering from isolated C and H atoms. The peak due to electrons scattered from C, is again shifted compared to the peak of electrons scattered from Xe. The Xe, C and H peaks all have clearly different widths. The C and H peak areas are compared. Their relative intensity shows no substantial deviation (<10%) from what is expected based on either simple Rutherford cross sections, or state-of-the-art elastic scattering calculations. The latter observation is in strong contrast to electron scattering results from a gaseous equimolar H2-D2 mixture and from electron and neutron scattering results from polymers at similar momentum transfer.

    Original languageEnglish
    Article number135204
    JournalJournal of Physics B: Atomic, Molecular and Optical Physics
    Volume41
    Issue number13
    DOIs
    Publication statusPublished - 14 Jul 2008

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