ENDOR Study of theHCenter in LiF

Abstract

An ENDOR study of the $H$ center in LiF has been performed. Hyperfine constants for 10 sets of nonequivalent neighboring nuclei have been determined by fitting the data with a spin Hamiltonian. The results of this study show that the $H$ center is an ${\mathrm{F}}_2^{-}$ molecule ion which is oriented along a $〈110〉$ direction and located on an ${\mathrm{F}}^{-}$ lattice site, and which is associated with a ${\mathrm{Na}}^{+}$ impurity.