The study of a number of alkalihalide crystals with an Eu2 additive disclosed that, despite one and the same activator, the mechanism of recombination luminescence has its own special fetaures in various base materials. The authors proceeded with investigations along these lines using NaBr, NaI, and CsI crystals activated with Eu2 the specimens were grown from a melt with europium concentration in the melt of 0.01 and 0.1 wt. .
Edited trans of Radiatsionnaya Fizika Nemetallicheskikh Kristallov. Sbornik Statei (USSR) v3 n3 p72-77 1971, by Paul J. Reiff.