FILM-TYPE SCINTILLATOR FOR DETECTING BETA- AND PHOTON EMISSIONS Russian patent published in 2010 - IPC G01T1/20 

FIELD: physics.

SUBSTANCE: invention relates to radiometry of liquid, gaseous and solid media, as well as to dosimetry of ionising radiations. The film-type scintillator is made from a polycarbonate filled with a scintillating luminophor from a mixture of powdered crystalline ortho-silicate germanate of yttrium, gadolinium, lutetium and cerium, having general stoichiometric formula Y_2-x-y-z·Gd_x·Lu_y·Ce_z·O₃(SiO₂)_1-p(GeO₂)_p with stoichiometric index intervals: x=0.01…1.0, y=0.01…0.9, z=0.005…0.05, p=0…0.8 and powdered crystalline ortho-aluminate of yttrium, gadolinium, lutetium and cerium, having general stoichiometric formula Y_3-m-n·Gd_m·Ce_n·(AlGa)₅-O₁₂ with stoichiometric index intervals m=0.01…1, n=0.01…0.1. Maximum wavelength of the optical radiation of the mixture of luminophors ranges from 420 to 550 nm, and scintillation duration ranges from 30 to 40 ns.

EFFECT: shifting the spectrum of optical radiation from the green to the red region, which enables detection of radiation intensity using silicon-based photodiodes, as well as increase in relative light output of the scintillator when used in detectors with a large sensitive area for detecting low levels of radiation intensity.

3 cl, 3 tbl