Accession Number : AD0653634

Title :   PHYSICS OF VIBRONIC TRANSITIONS IN THE SPECTRA OF RARE EARTH IONS IN CRYSTALS.

Descriptive Note : Final rept., 15 Nov 65 - 15 Nov 66,

Corporate Author : HEBREW UNIV JERUSALEM (ISRAEL) MICROWAVE DIV

Personal Author(s) : Low,W. ; Yatsiv,S.

Report Date : 25 FEB 1967

Pagination or Media Count : 44

Abstract : Vibronic transitions due to the existence of a gadolinium ion adjacent to a H(-) ion in CaF2 were investigated. The association of the RE(3+) and the H(-) ion in the host lattice is manifested by: (1) The appearance of new infra-red absorption frequencies which are not observed in undoped and hydrogenated CaF2. The frequencies depend on the particular RE ion doping. (2) Observation of new electronic transitions in the near U.V. of gadolinium due to new sites adjacent to an H(-) ion. (3) Observation of vibronic transitions separated from the corresponding parent transitions of the RE ion by the infra-red absorption frequency of the localized H(-). The IR, electronic and vibronic spectra are strongly dependent on the concentration of the RE doping, the particular dopant and the mode of annealing. Conclusions can be derived from comparison of hydrogenated and deuterated crystals. (Author)

Descriptors :   (*RARE EARTH ELEMENTS, *INFRARED SPECTROSCOPY), (*GADOLINIUM, INFRARED SPECTRA), (*CRYSTAL DEFECTS, RARE EARTH ELEMENTS), CALCIUM FLUORIDES, IMPURITIES, HYDROGEN, INTERACTIONS, ELECTRON TRANSITIONS, ABSORPTION SPECTRA, ULTRAVIOLET SPECTRA, VISIBLE SPECTRA, DOPING, ANNEALING, CONCENTRATION(CHEMISTRY), DEUTERIUM COMPOUNDS, ISRAEL

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE