Accession Number : AD0429197

Title :   EXCHANGE INTERACTION BETWEEN PAIRS OF CHROMIUM IONS IN RUBY,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF

Personal Author(s) : Kisliuk,P. ; Krupke,W. F.

Report Date : 18 NOV 1963

Pagination or Media Count : 30

Abstract : The temperature dependence of the absorption of the spectral lines due to pairs of chromium ions in concentrated ruby at 7009 and 7041 Angstroms is fitted to theory by assuming isotropic exchange coupling. Other frequencies predicted from the parameters thus determined are identified in the observed spectrum. Higher states are identified by means of the excitation spectrum and the spacings already known from the identification of the lower levels. To a closer approximation, it is found that the ground state splitting can be fitted within the experimental error using isotropic exchange if a biquadratic term is included, in addition to the usual quadratic term. Furthermore, the ratio of the coefficients of these terms is of the same order as that found in other materials and predicted by theory. The excited states, however, do not appear to fit a theory based on isotropic exchange coupling as the sole perturbation. (Author)

Descriptors :   (*CHROMIUM, LINE SPECTRA), (*ABSORPTION SPECTRA, RUBY), PERTURBATION THEORY, IONS, TEMPERATURE, THEORY, SPECTROSCOPY, ATOMIC ENERGY LEVELS, FUNCTIONS(MATHEMATICS), ENERGY, EMISSIVITY, FLUORESCENCE

Distribution Statement : APPROVED FOR PUBLIC RELEASE