Abstract: The present invention is a creation of advanced scintillation materials having emission maximum in the range of about 400-450 nm and based on cerium doped a rare-earth oxyorthosilicate including LFS, LSO, LYSO, LGSO, GSO crystals having defects in comparison with ideal crystal structure, and said defects change the optical transmission and absorption spectra in the range about of 200-340 nm. The picks of maximum absorptions characterised in that the ratio of A(?1=250-270 nm)/A(?3=280-300 nm)?1, A(?2=280-300)/A(?3=340-380)?1, A(?1=250-270)/A(?2=280-300 nm)>1.

Abstract: 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 CexLu2+2y?xSi1?yO5+y, CexLiq+pLu2?p+2?y?x?zAzSi1?yO5+y?p, CexLiq+pLu9.33?x?p?z?0.67AzSi6O26?p, where A is at least one element selected from group consisting of Gd, Sc, Y, La, Eu, Tb, x is value between 1×10?4 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.