Regensburg 2013 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 9: Poster: Interfaces and Thin Films (joint session with DECHEMA and VDI)

CPP 9.20: Poster

Montag, 11. März 2013, 17:30–19:30, Poster C

Ordering effects in thin xenon films studied with NMR — •Alexander Potzuweit, Hagen Allmrodt, Lars Kraft, Anuschka Schaffner, and Heinz Jänsch — Fachbereich Physik, Philipps-Universität Marburg, D-35032 Marburg

We employ NMR of hyperpolarized ¹²⁹Xe to investigate ordering phenomena and diffusion in thin Xe films. To increase the sensitivity towards structurally caused 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. Thus we are able to investigate ordering effects like annealing. Using different pulse sequences makes it possible to distinguish local and global effects. Here we present the technical development of the apparatus and discuss first results.