SCINTILLATION SUBSTANCE (OPTIONS) Russian patent published in 2004 - IPC

FIELD: light-emitting materials.

SUBSTANCE: invention provides scintillation substances, which can be used in nuclear physics, medicine, and petroleum industry for registering x-ray, gamma, and alpha-emissions; for non-destroying control of solid body structure; and for three-dimensional positron-electron and x-ray computer tomography and fluorography. Scintillation substances based on lutetium and cerium-containing silicate are described by following general formulae: Ce_xLi_2+2y-xSi_1-yO_5+y, Ce_xLi_q+pLu_2-p+2y-x-zA_zSi₆O_5+y+p, and Ce_xLi_q+pLu_9.33-x-p-z□_0.67A_zSi₆O_26-p, and Ce_xLi_1+q+pLu_9-x-p-zA_zSi₆O_26-p, where A is at least one of following elements: Gd, Se, Y, La, Eu, Tb; and x varies from 1 x 10^-4 to 0.02; y from 0.024 to 0.09; z does not exceed 0.05; q does not exceed 0.2; p does not exceed 0.05; and z does not exceed 8.9. Substances are characterized by high density, high light yield, low afterglow time and small losses during manufacture of scintillation cells for three-dimensional tomographs.

EFFECT: improved performance characteristics.

21 cl, 4 dwg, 1 tbl