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dc.creatorFajardo, Mario E.en_US
dc.creatorTam, Simonen_US
dc.date.accessioned2006-06-15T18:59:06Z
dc.date.available2006-06-15T18:59:06Z
dc.date.issued1998en_US
dc.identifier1998-FC-04en_US
dc.identifier.urihttp://hdl.handle.net/1811/18759
dc.description$^{a}$ M.E. Fajardo and S. Tam, accepted J. Chem. Phys. (1998).en_US
dc.descriptionAuthor Institution: AFRL/PRSP, Propulsion Sciences and Advanced Concepts Division, US Air Force Research Laben_US
dc.description.abstractAt last year's Symposium, we reported the rapid vapor deposition of millimeters thick parahydrogen (pH2) solids of remarkable optical clarity. In this paper we present our progress towards understanding the microscopic structure of these samples, as well as a potpourri of spectra of trapped molecular species illustrating some of the advantages of performing matrix isolation spectroscopy (MIS) in these samples. Infrared (IR) and Raman spectra of pure pH2 samples show a very low orthohydrogen and vacancy content, and a mixed hcp/fcc polycrystalline structure for as-deposited samples, which converts to hcp upon $annealing^{a}$. The increased optical path lengths offer significant improvements in spectroscopic data quality, and reveal novel dopant-induced IR absorptions of the pH2 matrix host itself. Thus, while traditional MIS studies in rare gas hosts can only probe the influence of the matrix environment on the spectrum of the dopant ``solute,'' in pH2 the response of the host ``solvent'' is directly observable as well. This complementary information may prove key to identifying conclusively the microscopic structures of dopant trapping sites.en_US
dc.format.extent128995 bytes
dc.format.mimetypeimage/jpeg
dc.language.isoEnglishen_US
dc.publisherOhio State Universityen_US
dc.titleMATRIX ISOLATION SPECTROSCOPY IN MILLIMETERS THICK VAPOR DEPOSITED PARAHYDROGEN SOLIDSen_US
dc.typearticleen_US


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