Accession Number : AD0714686
Title : Electronic and Magnetic Properties of High Temperature Condensed Systems.
Descriptive Note : Final rept. 1 Feb-30 Jun 70,
Corporate Author : CHICAGO UNIV ILL DEPT OF CHEMISTRY
Personal Author(s) : Nachtrieb,Norman H.
Report Date : 08 OCT 1970
Pagination or Media Count : 22
Abstract : Magneto-optic Rotatory Dispersion (MORD) measurements on thin crystalline films and melts of pure thallous halides are reported. The MORD data are interpreted in terms of the Buckingham - Stephens Theory, and the observed Faraday Rotation is attributed to the singlet S(o) to triplet P(1) transition in Tl(+). The A(ja) and B(ja) terms of the Buckingham - Stephens Theory contribute about equally to the observed rotation. At a fixed frequency, the observed rotation is a linear function of the temperature, and is attributed to vibrationally induced configuration-mixing of the Tl(+) electronic states. A discontinuous increase in the magnetic rotation is observed at the melting point of the salt at frequencies < omega(ja), and the MORD band maximum undergoes a red shift. Instrumentation for measurement of the magnetic susceptibility of alkali metal-alkali halide molten solutions has been redesigned to give higher sensitivity, in preparation for studies of the cesium-cesium chloride system over the full concentration range of the single phase system. (Author)
Descriptors : (*THALLIUM COMPOUNDS, *MAGNETOOPTICS), FILMS, MOLECULAR ROTATION, HALIDES, ULTRAVIOLET SPECTRA, VISIBLE SPECTRA
Subject Categories : Atomic and Molecular Physics and Spectroscopy
Distribution Statement : APPROVED FOR PUBLIC RELEASE