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Flynn, C.P. Layton, Ralph Phillip 2011-07-05T15:25:08Z 2011-07-05T15:25:08Z 10000-01-01 1977 Atomic hydrogen and chalcogen (0 and Te) impurities in alkali metal thin films have been studied. Their optical properties were determined by transmission measurements in the vacuum ultraviolet and transport properties were probed by means of electrical resistance. The observed optical absorption and small residual resistivities of Hand 0 indicate unambiguously that these elements enter alkali metals as interstitial atoms much as in bcc transition metals. The optical spectra lack prominent features other than a very sharp peak at ~11.5 eV induced by the interstitial (but not by substitutional) atoms in Cs. This important monitor of impurity structure apparently arises from the perturbation by the interstitial impurities of the O2 ,3 core absorption edge of neighboring Cs atoms. It probably occurs near the outer core optical threshold for all alkali metals. Te impurity spectra lack this feature and their substitutional location is confirmed by a tenfold increase in resistivity over that of O. The resistance data indicate that it exists mainly as a Te--ion in alkali metal host lattices, and the observed energy width and concentration dependence of the optical profile confirms this deduction. Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-07-05T15:25:08Z No. of bitstreams: 1 1977_layton.pdf: 5317943 bytes, checksum: c94df8ac7c12c5de094380ed386538c9 (MD5) Made available in DSpace on 2011-07-05T15:25:08Z (GMT). No. of bitstreams: 1 1977_layton.pdf: 5317943 bytes, checksum: c94df8ac7c12c5de094380ed386538c9 (MD5) Previous issue date: 1977 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-07-05T15:25:08Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:19:44-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis Thesis U of I Only 2859927 http://hdl.handle.net/2142/25642 en 1977 Ralph Phillip Layton optical studies transport studies atomic hydrogen chalcogen impurities alkali metals alkali metal thin films Optical and transport studies of atomic hydrogen and chalcogen impurities in alkali metals Dissertation / Thesis text Ph.D. Physics Physics University of Illinois at Urbana-Champaign Dissertation