Rutherford Backscattering Spectroscopy (Tim Spila)

[@mohibmohib6442]

Why RBS does he need to ultra-high vacuum ?

[@zeniasyriany77]

I really like it when one of the scientists advertises for his loving experimental technique. The most expressive element of this type of presentation is a conversation about the detection limit of elements. When I see only one sentence with 0.1 to 1e-6 atomic percentages, I start to remember a beautiful article from the XPS technique: doi.org/10.1002/sia.5406, in which you can find a colorful table of elements with their detection limits if a given element is placed in matrices created from another element. In this article, you can find that the level of detection of the XPS technique from 0.1 to 1 atomic percent, popular in the literature (unfortunately also in the scientific literature), occurs in an incredibly small number of cases. At RBS, the experiments with the samples from the real word have the same problems. My colleagues did not find any RBS gurus can recognize 2.5 at% Mn in the GaAs matrix.

[@zeniasyriany77]

19:36 Are you sure RBS is a non-destructive technique? Have you seen spots on the surface of the samples after the He-ion exposure? Do these spots mean nothing to you? I think it was just a joke and you understand that helium atoms disrupt the structure of the samples during measurements.

[@mahwishsarwar8975]

@Zenia Syriany You are right. I have noticed those dark spots on the sample after RBS. Do you know if they influence the whole lattice or only at that point?