Exoelectron emission of sulfates

Exoelectron emission of alkali-earth metals sulphates is discussed. The compounds were prior subjected to increasing effects of electron or ion beams, β- and α-particles, X-rays, and u.v.- and visible light. Subsequent investigations showed the exoelectron emission capture centres and luminescence capture centres to be different sites with dissimilar properties. An orderly distribution of defects results in formation of separate luminescent and emission capture centers