SQUID reveals NMR fingerprints

The NMR spectra of atoms of the rare isotope helium-3 have been obtained by an international research group from Royal Holloway University of London, Cornell University in Ithaca, New York and the Physikalisch-Technische Bundesanstalt, PTB's Berlin Institute, Germany, using a SQUID, a superconducting quantum interference device. Measurements were made possible by confining the superfluid material to an extremely thin, quasi two-dimensional, liquid film at 4 Kelvin. There is fundamental scientific interest in this material. The team explains that controlled confinement of nanofluidic samples provides a new laboratory for the study of topological superfluids and their surface- and edge-bound excitations. Helium-3 is candidate for a second-generation fuel for, still hypothetical, nuclear fusion reactors.