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Raman Spectroscopy of Small Para-H2 Clusters Formed in Cryogenic Free Jets

AuthorsTejeda, Guzmán ; Fernández Sánchez, José María ; Montero, Salvador ; Blume, D.; Toennies, J.P.
Keywords[PACS] Atomic and molecular clusters
[PACS] Raman and Rayleigh spectra (including optical scattering)
[PACS] Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals
Issue Date2-Jun-2004
PublisherAmerican Physical Society
CitationPhys. Rev. Lett. 92, 223401 (2004)
AbstractSmall para-H2 clusters (pH2)N with N=2,...,8 have been identified by Raman spectroscopy in cryogenic free jets of the pure gas, near the Q(0) Raman line of the H2 monomer. The high resolution in space, time, and number size makes it possible to follow their growth kinetics with distance from the orifice. At lower source temperatures liquid clusters appear early in the expansion and then undergo a gradual phase transition to the solid state. The technique is very promising for exploring superfluidity in pure (pH2)N clusters
Description4 pages, 4 figures.-- PACS nrs.: 36.40.–c, 33.20.Fb, 61.46.+w.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.92.223401
Appears in Collections:(CFMAC-IEM) Artículos
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