Abstract
The EPR spectrum of in NBr single crystals has been observed and fitted with an axial spin Hamiltonian. Optical transitions of the center in NBr and NCl have been identified and an interpretation of the radiation-induced 380-mμ absorption band, first observed by Rüchardt in both ammonium halides, is presented. These measurements show that the center in the ammonium halides is essentially the same as in the alkali halides. A description is given of a procedure for determining the polarization of the two observed optical transitions, and they are both found to be largely -polarized. These polarizations can be explained by the generally accepted energy-level scheme.
- Received 27 September 1965
DOI:https://doi.org/10.1103/PhysRev.142.513
©1966 American Physical Society