Angular distribution of reemitted positrons from W(100) with over layers of oxygen and LiF

Sudarshan Kathi, Sergey N. Samarin, Paul Guagliardo, P.J. Wilkie, Vladimir Petrov, James Williams

    Research output: Contribution to journalArticle

    Abstract

    © 2016, Springer-Verlag Berlin Heidelberg. The angular distribution of reemitted positrons has been measured from clean and oxygen exposed W(100), as well as from W(100) with LiF deposited on the surface, at an incident positron energy of 600 eV. Both the deposition of LiF and oxygen adsorption on W(100) caused a drastic reduction in the reemitted positron intensity and broadening of the angular distribution of the remitted positrons from W(100). The angular distribution of reemitted positrons in each case could be best fitted to the sum of two Gaussians, a narrow Gaussian whose width is in the range expected from a one-dimensional step model of positron reemission and an additional broad Gaussian. The area under the narrow Gaussian is more sensitive to surface over layers than the broad Gaussian.
    Original languageEnglish
    Article number361
    JournalApplied Physics A: materials science and processing
    Volume122
    Issue number4
    DOIs
    Publication statusPublished - 2016

    Fingerprint Dive into the research topics of 'Angular distribution of reemitted positrons from W(100) with over layers of oxygen and LiF'. Together they form a unique fingerprint.

    Cite this