Abstract
We have found that the relative intensity of the and crystal-field components of the 3→34s transition of in alkali halide hosts provides a measure of the ground-state off-center displacement along the [111] axis. This is shown by deriving the crystal- field potential that describes the off-center effect of , and then calculating the transition moments to the and final states. By analyzing the spectra of in numerous alkali halide hosts, it is found that the degree of off-center displacement increases with the lattice constant of the alkali halide.
- Received 27 April 1987
DOI:https://doi.org/10.1103/PhysRevB.36.6125
©1987 American Physical Society