MCenters in Potassium Bromide. I

摘要

Oriented distributions ofMcenters have been produced in KBr and the resulting anisotropic spectra measured at minus;76deg; and minus;194deg;C. Dichroic absorption bands are observed corresponding to transitions from the ground state to a variety of higher excited states. Included in these are previously unreported transitions that lie 0.7ndash;1.1 eV to higher energy than theFband. Some energyhyphen;level assignments are made using theF2model of theMcenter.A simplified treatment is presented for the interpretation of dichroic spectra arising from the optical dipole transitions of anisotropic centers in an otherwise isotropic lattice.