Accession Number : AD0616740

Title :   EFFECTS OF UNIAXIAL STRESS UPON THE VISIBLE RUBY ABSORPTION SPECTRUM.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s) : Spitale,Guy Calvin

Report Date : JUN 1965

Pagination or Media Count : 129

Abstract : An investigation of the effects of uniaxial stress upon the ruby absorption spectrum was conducted using a photographic technique. To reduce the effects of thermal broadening of spectral lines, ruby samples were immersed in liquid nitrogen. A heretofore uninvestigated series of satellite absorption lines was found near the red doublet. Intensity is dependent upon the concentration of chromium in the lattice. This suggests that the newly observed lines are caused by exchange interactions between chromium ions. The effects on these lines of uniaxial stress was measured as a function of polarization and orientation of the c-axis. A linear dependence of spectral line position on stress, a general shift of all lines toward the red, and a marked splitting of the satellites were observed. A theoretical analysis from the point of view of crystalline field theory was conducted in the weak field scheme.

Descriptors :   (*RUBY, ABSORPTION SPECTRA), (*STRESSES, RUBY), ULTRAVIOLET SPECTRA, VISIBLE SPECTRA, CRYOGENICS, CHROMIUM, IONS, CRYSTAL LATTICES, DISTORTION, PERTURBATION THEORY, SYMMETRY(CRYSTALLOGRAPHY), FIELD THEORY, INTERFEROMETERS, COMPUTER PROGRAMMING

Distribution Statement : APPROVED FOR PUBLIC RELEASE