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Title: | Experiments on small (H2)N clusters |
Authors: | Montero, Salvador CSIC ORCID; Hernández Morilla, Juan CSIC; Tejeda, Guzmán CSIC ORCID; Fernández Sánchez, José María CSIC ORCID | Keywords: | [PACS] Atomic and molecular clusters [PACS] Raman and Rayleigh spectra [PACS] Boson systems |
Issue Date: | 6-Feb-2009 | Publisher: | Springer | Citation: | European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics 52: 31-34 (2009) | Abstract: | The nucleation process of small hydrogen clusters has been studied in detail with space, time, and number size resolution on the basis of supersonic expansions of the gas through a cryogenic nozzle operating in the thermal range 24 < T < 110 K. The diagnostic of the jet medium is based on high sensitivity (few photons/sec) Raman spectroscopy with very high spatial resolution (~ 2 μm), enabling for quantitative measurements with time resolution in the domain of nanoseconds. Temperatures down to 0.1 K have been attained in the jet at a collisional rate low enough to avoid sudden freezing of the gas. Clusters between two and eight molecular units are observed size-resolved. Features of the ortho-ortho and ortho-para hydrogen dimers, and the role of three-body collisions for nascent dimers and trimers are reported. | Description: | 4 pages, 4 figures, 1 table.-- PACS nrs.: 36.40.-c, 33.20.Fb, 05.30.Jp. Contributed to: ISSPIC'14 - 14th International Symposium on Small Particles and Inorganic Cluster (Valladolid, Sep 15-19, 2008). |
Publisher version (URL): | http://dx.doi.org/10.1140/epjd/e2009-00031-y | URI: | http://hdl.handle.net/10261/12846 | DOI: | 10.1140/epjd/e2009-00031-y | ISSN: | 1434-6060 | E-ISSN: | 1434-6079 |
Appears in Collections: | (CFMAC-IEM) Artículos |
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