Accession Number : AD0648884

Title :   THE INTENSITY OF THE ABSORPTION BANDS OF RUBY,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Hsi-yi,Huang

Report Date : 05 DEC 1966

Pagination or Media Count : 26

Abstract : In ruby a Cr3+ ion and its six nearest neighboring O2- ions form a heavily distorted ocetahedron. Consequently, the magnitude of odd crystal field of the higher order is comparable with the first order odd field. Because of the site group of Cr3+ ion in ruby approximately retains C3nu symmetry, the higher order crystal field component T2mu type is very small and can be neglected, but those of the T1nu and A2nu type must be taken into account. The higher-order odd field components make appreciable contribution to Y band and U perpendicular band, but their contribution to U parallel band is neglibible. The intensities of U band and Y band are discussed with proper attention paid to the odd vibrations of ions. It has been concluded that the U parallel band absorption is mainly produced through the coupling of odd vibrations with electrons. With this point of view, the oscillator strength, the dichroism, the band shape, etc., of the absorption bands of ruby are analyzed. The results are in good agreement with experimental data.

Descriptors :   (*RUBY, ABSORPTION SPECTRA), (*ABSORPTION SPECTRA, INTENSITY), NUCLEAR MAGNETIC RESONANCE, PARAMAGNETIC RESONANCE, RESONANCE ABSORPTION, WAVE FUNCTIONS, SYMMETRY(CRYSTALLOGRAPHY), SELECTION RULES(PHYSICS), CRYSTAL LATTICES, VIBRATION

Subject Categories : Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE