title: Evidence for a bound HeH2 halo molecule by diffraction from a transmission grating.
abstract: The HeH2 van der Waals complex has been identified in a molecular beam produced by a cryogenic (T0=24.7 K) free jet expansion of a 1% H2 mixture in 99% 4He gas. The weakly bound HeH2 complexes in the beam are identified via their first order diffraction angles after passing through a 100 nm period transmission grating. An electron impact mass spectrometer analysis of the diffraction patterns is used to discriminate against ion fragments of the constituent gas clusters.
authors.affiliation: Max-Planck-Institut fur Stromungsforschung, 37073 Gottingen, Germany.
authors.forename: Anton
authors.initials: A
authors.lastname: Kalinin
authors.forename: Oleg
authors.initials: O
authors.lastname: Kornilov
authors.forename: Lev Yu
authors.initials: LY
authors.lastname: Rusin
authors.forename: J Peter
authors.initials: JP
authors.lastname: Toennies