An apparatus for NMR of laser-polarized Xe-129 on single crystal surfaces

Due to a lack of at least 2 orders of magnitude in the amount of sample nuc lei, single crystal surfaces are out of reach for conventional NMR measurem ents. Our aim is to prove that highly polarized Xe-129 provides a technique to overcome this restriction. Therefore an apparatus for polarizing Xe-129 up to 0.7 by spin transfer from optically pumped Rb has been designed as w ell as an NMR spectrometer in combination with a UHV chamber with sample cl eaning, cooling and characterization abilities and a special manifold of gl ass stopcocks with a liquid nitrogen cooled trap for dosing nitrogen free p olarized Xe into the chamber onto the surface.