摘要
In inorganic glasses there exists a seriously inhomogeneous broadening in optical and EPR spectra of paramagnetic ions due to the intrinsic diagonal and off-diagonal distortion of the sites. In other words, it might be thought as an extension of site-symmetry for paramagnetic ions on a certain point group of symmetry, which gives rise to the disorder in the energy eigenvalues and coupling strength from site to site. In the study on emission properties of impurity ions in glasses the
