title: High-Resolution Helium Atom Time-of-Flight Spectroscopy of Low-Frequency Vibrations of Adsorbates.
authors.affiliation: Max Planck Institut für Strömungsforschung, Bunsenstrasse 10, 37073 Göttingen, Germany.
authors.forename: Frank
authors.initials: F
authors.lastname: Hofmann
authors.forename: J. Peter
authors.initials: JP
authors.lastname: Toennies