Anisotropy of paramagnetic cadmium centers in alkali-halide crystals

Anisotropic and paramagnetic centers of Cdsub(F)sup(+), which are Cd+ cation ions located beside anion vacancies, have been found and studied by the EPR method in LiCl, NaCl, KCl crystals with cadmium impurity, the crystals being irradiated by X-rays at a room temperature. The unpairing electron wave function is delocalized approximately 30% from a Cdsub(F)sup(+) cation ion to an anion vacancy along C4 axis. The parameters of the spin-hamiltonian of Cdsub(F)sup(+) centers in LiCl, NaCl, KCl crystals are determined. Cd+ cation ions located beside a cation vacancy are also studied. Several types of such centers differing in mutual arrangement of a Cd+ ion and a vacancy have been revealed