INORGANIC SCINTILLATION MATERIAL, CRYSTALLINE SCINTILLATOR AND RADIATION DETECTOR Russian patent published in 2011 - IPC C01F17/00 C30B29/12 C09K11/85 G01T1/202 

FIELD: chemistry.

SUBSTANCE: invention relates to novel inorganic scintillation materials, a novel crystalline scintillator, especially in form of a monocrystal, and can be used to detect ionising radiation in form of low-energy electromagnetic waves, gamma radiation, X-rays, cosmic rays and particles in fundamental physics, computerised tomography devices, PET tomographic scanners, new-generation tomographic scanners, gamma spectrometres, cargo scanners, well logging systems, radiation monitoring systems, etc. The halide-type scintillation material has the formula Ln_(1-m-n)Hf_nCe_mA_(3+n), where A is either Br, Cl or I or a mixture of at least two halogens from this group, Ln is an element selected from: La, Nd, Pm, Sm, Eu, Gd, Tb, Lu, Y; m is molar fraction of substitution of Ln with cerium, n is the molar fraction of substitution of Ln with hafnium, m and n is a number greater than 0 but less than 1, (m+n) is less than 1. The crystalline scintillator has formula Ln_(1-m-n)Ce_mA₃:n-Hf⁴⁺, where Ln_(1-m)Ce_mA₃ is the formula of the matrix of the material, A is Br, O or I or a mixture of at least two halogens from this group, Ln is an element selected from: La, Nd, Pm, Sm, Eu, Gd, Tb, Lu, Y; Hf⁴⁺ is a dopant, m is a number greater than 0 but less than or equal to 0.3, n is content of the Hf⁴⁺ dopant (mol %) which is preferably between 0.05 mol % and 1.5 mol %. The radiation detector has a scintillation element based on the novel inorganic scintillation material.

EFFECT: scintillation material, crystalline scintillator and radiation detector has excellent scintillation properties, particularly long fluorescence lifetime, good energy resolution and is characterised by low hygroscopicity.

24 cl, 2 tbl, 10 ex