Rebrova N. Scintillation materials based on chlorides and bromides of alkali and alkaline earth metals activated by europium

The work is devoted to the search of new scintillation materials based on chlorides and bromides of alkali and alkaline earth metals activated by europium (II) and the development of methods for their chemical preparation. Laboratory techniques for the synthesis of the dopants used for activation and crystal growth techniques for ternary halides scintillators of alkali and alkaline earth metals have been worked out. The dependence of the scintillating efficiency on Eu2+ concentration and on the component ratio at partial replacement of anions or cations was investigated. It has been experimentally proven that the ternary halides of alkali and alkaline earth metals show enhanced moisture stability and scintillation performance in comparison to CaX2 (X=Cl, Br). It was found that in the single crystals of the ternary Eu2+-activated halides ABX3 the maximum values of light yield are observed in Rb-containing materials. According to the results of the research a series of new crystalline scintillator Ca1-yEuyBr2, CsCa1-yEuyBr3, RbCa1-yEuyBr3, RbCa1-yEuyCl3 and CsCa0,95Eu0,05ClxBr3-x has been suggested.