Accession Number : AD0427088

Title :   VIBRONIC SPECTRA OF SRF2:SM2+ AND BAF2:SM2+,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF

Personal Author(s) : Richman,Isaac

Report Date : 22 NOV 1963

Pagination or Media Count : 11

Abstract : A model using Born-von Karmann boundary conditions, which predicts the number of vibronic satellites and the k = 0 selection rules, is proposed in this report. It is shown however that the k = 0 selection rules are too restrictive to explain the vibronic spectrum and that to obtain a satisfactory explanation transitions involving vibrations away from k = 0 must be considered. The model, when such transitions are taken into account, is shown to be consistent with the observed data. It is p9oposed that one of the modes observed in the vibronic spectrum corresponds to vibrations of the transverse optical branch, a second to the longitudinal optical branch, and a third to transitions away from k = 0 involving the Raman active branch. This model is able to quali/atively explain the differences observed in the two host lattices. (Author)

Descriptors :   (*ELECTRON TRANSITIONS, SELECTION RULES(PHYSICS)), LINE SPECTRA, RAMAN SPECTROSCOPY, STRONTIUM COMPOUNDS, BARIUM COMPOUNDS, FLUORIDES, SAMARIUM COMPOUNDS, SINGLE CRYSTALS, CRYSTAL LATTICES, ATOMIC ENERGY LEVELS, VIBRATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE