dc.creator Callegari, C. en_US dc.creator Conjusteau, Andre en_US dc.creator Reinhard, I. en_US dc.creator Lehmann, K. K. en_US dc.creator Scoles, G. en_US dc.creator Dalfovo, Frankco en_US dc.date.accessioned 2006-06-15T19:20:52Z dc.date.available 2006-06-15T19:20:52Z dc.date.issued 1999 en_US dc.identifier 1999-TD-09 en_US dc.identifier.uri http://hdl.handle.net/1811/19462 dc.description $^{a}$ K. Nauta and R.E. Miller, submitted to Phys. Rev. Lett. $^{b}$ K. Nauta and R.E. Miller, personal communication. $^{c}$ S. Grebenev, J.P. Toennies, and A.F. Vilesov, Science 279, 2083 (1998). $^{d}$ Callegari et al., to be published. $^{e}$ Milne-Thomson, Theoretical Hydrodynamics, Fifth Edition, p. 542, Dover Publications, Inc., 1996; K.K. Lehmann, Mol Phys., in press. $^{f}$ F. Dalfovo, Z. Phys. D 29, 61 (1993); F. Dalfovo et al., Phys. Rev. B 52, 1193 (1995). en_US dc.description Author Institution: Department of Chemistry, Princeton University; Dipartimento di Fisica, Universit\`{a} di Trento en_US dc.description.abstract In recent times, rotationally resolved infrared spectra of several linear molecules $(HCN^{a}, HCCH^{b}, OCS^{c}, HCCCN^{d})$ embedded in ${^{4}}He$ clusters have been measured by us and by other groups. From such spectra, effective moments of inertia $(1_{eff})$ can be calculated that are consistently larger (up to a factor of 3, depending on the molecule) than the corresponding gas phase values. While the trend can be explained by a simple hydrodynamic model (a solid ellipsoid rotating in a non viscous, incompressible $fluid^{e}$), quantitative predictions need to take into account the effect of the increased helium density around the guest molecule. We have calculated the density profiles of He clusters doped with the above molecules, using the density-functional $approach^{f}$, and we find that the agreement between measured and calculated values of $I_{eff}$ is significantly improved. en_US dc.format.extent 122582 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title EFFECTIVE MOMENTS OF INERTIA OF LINEAR MOLECULES EMBEDDED IN ${^{4}}He$ CLUSTERS. en_US dc.type article en_US
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