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