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O: Fachverband Oberflächenphysik

O 36: Poster Session II (Metals; Nanostructures at surfaces; Surface or interface magnetism; Spin-Orbit Interaction at Surfaces; Electron and spin dynamics; Surface dynamics; Methods; Theory and computation of electronic structure)

O 36.113: Poster

Dienstag, 15. März 2011, 18:30–22:00, P4

Preparation of highly polarized Xe with variable 129Xe content — •Alexander Potzuweit, Matthias Buschmann, Richard Kastelik, Anuschka Schmitt, and Heinz Jänsch — Fachbereich Physik, Philipps-Universität Marburg, D-35032 Marburg

We employ NMR of hyperpolarized 129Xe to investigate surface phenomena. Dynamic processes at the bulk surfaces can be monitored by exchange spectroscopy (EXSY) of the bulk and surface atoms (Δ σ ≈ 100ppm). The annealing of Xe films can be investigated by line narrowing. To increase the sensitivity towards structurally caused, local inhomogeneities a small line width is favorable. In solid Xe the line width is dominated by dipolar interaction with neighboring nuclear spins. This can be substantially reduced by diluting the NMR-active isotope 129Xe in the NMR-inactive isotope 132Xe. With the new, improved experimental setup we will be able to provide mixtures of highly polarized 129Xe and 132Xe with adjustable abundances. Here we present the technical development of the apparatus and discuss first results.

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DPG-Physik > DPG-Verhandlungen > 2011 > Dresden