| 摘要 |
Inventions relates to scintillation substances and they may be utilized in nuclear physics, medicine and oil industry for recording and measurements of X-ray, gamma-ray and alpha-ray, nondestructive testing of solid states structure, three-dimensional positron-emission tomography and X-ray tomography and fluorography. Substances based on silicate comprising lutetium and cerium characterized in that compositions of substances are represented by chemical formulae Ce<SUB>x</SUB>Lu<SUB>2+2y-x</SUB>Si<SUB>1-y</SUB>O<SUB>5+y</SUB>, Ce<SUB>x</SUB>Li<SUB>q+p</SUB>Lu<SUB>2-p+2-y-x-z</SUB>A<SUB>z</SUB>Si<SUB>1-y</SUB>O<SUB>5+y-p</SUB>, Ce<SUB>x</SUB>Li<SUB>q+p</SUB>Lu<SUB>9.33-x-p-z</SUB>□<SUB>0.67</SUB>A<SUB>z</SUB>Si<SUB>6</SUB>O<SUB>26-p</SUB>, where A is at least one element selected from group consisting of Gd, Sc, Y, La, Eu, Tb, x is value between 1x10<SUP>-4 </SUP>f.units and 0.02 f.units., y is value between 0.024 f.units and 0.09 f.units, z is value does not exceeding 0.05 f.units, q is value does not exceeding 0.2 f.units, p is value does not exceeding 0.05 f.units. Achievable technical result is the scintillating substance having high density, high light yield, low afterglow, and low percentage loss during fabrication of scintillating elements.
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