FIELD: physics.
SUBSTANCE: invention relates to a scintillator that can be used as an X-ray detector in medicine, when inspecting things at airports, inspecting cargo in ports, in oil prospecting. The scintillator contains a CsI crystal as its base and Tl, Bi and O, wherein the concentration a Bi with respect to Cs in the crystal is 0.001 atomic million-1 ≤a≤ 5 atomic million-1; and the ratio (a/b) of the concentration a Bi with respect to Cs in the crystal to the concentration of b O with respect to I in the crystal is of 0.005⋅10-4 to 200⋅10-4.
EFFECT: scintillator has a high output at high afterglow characteristics.
2 cl, 4 dwg, 1 tbl, 12 ex
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