DPG Phi
Verhandlungen
Verhandlungen
DPG

Bonn 2000 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

A: Atomphysik

A 22: Heliumcluster (gemeinsam mit dem FV Molekülphysik)

A 22.3: Vortrag

Freitag, 7. April 2000, 11:30–11:45, HS VII

Evidence for Superfluidity in OCS(pH2)15−17 Clusters inside 4He Droplets at 0.15 K — •S. Grebenev1,2, B. Sartakov3, A.F. Vilesov1,2, and J.P. Toennies21Ruhr-Universitat Bochum — 2Max-Planck-Institut fur Stromungsforschung — 3General Physics Institute, Moscow

Small clusters consisting of an OCS chromophore molecule surrounded by 14-17 para-H2 or ortho-D2 molecules within large pure 4He droplets and inside a mixed 4He/3He droplet have

been investigated by infra-red depletion spectroscopy. The rotational spectra of both isotopomers in the pure 4He droplets (T=0.38 K) exhibit a distinct Q-brunch, indicating the excitation of angular momentum around the OCS-symmetry axis. In the colder (T=0.15 K) 4He/3He mixed droplets the Q brunch remains in the OCS(oD2)15−17 spectrum but disappears in OCS(pH2)14−16. The corresponding decrease in moment of inertia in the pH2 clusters cannot be explained by the change in the Boltzmann factor and is attributed to a superfluid state.

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2000 > Bonn