CESIUM IODIDE-BASED SCINTILLATION MATERIAL AND METHOD OF PREPARATION THEREOF

摘要

FIELD: scintillation materials. SUBSTANCE: material is activated with thallium and contains, as admixture, metal carbonate Me_x(CO₃)_y where Me is cationic admixture, 1x ≤ 2, and 1 ≤ y2. Absorption spectrum of material has valent vibration band linked to carbonate ion in the region of 7 mcm with absorption coefficient from 1,4•10^-3 to 2•10^-2cm^-1. Material is prepared by melting cesium iodide, adding activating admixture of thallium iodide, and subsequent crystallization. According to invention, starting material and/or melt is supplemented by 3•10^-4-5•10^-3 wt % of cesium carbonate and sodium salt with 3•10^-4-7,5•10^-3 wt % of sodium. EFFECT: enabled growing highly homogeneous and radiation-resistant crystals 300 mm in diameter. 3 cl, 1 tbl, 3 ex