Scintillator
AssigneeNihon Kessho Kogaku Co., Ltd.
InventorDaisuke Totsuka
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Abstract
Provided is a scintillator having a crystal containing CsI (cesium iodide) as a host material thereof and thallium (Tl) and bismuth (Bi), and a novel scintillator which maintains a high output and simultaneously can further enhance the afterglow characteristics. There is proposed a scintillator having a crystal containing CsI (cesium iodide) as a host material thereof and Tl, Bi and O, wherein the concentration a of Bi with respect to Cs in the crystal is 0.001 atomic ppm≦a≦5 atomic ppm; and the ratio (a/b) of the concentration a of Bi with respect to Cs in the crystal to the concentration b of O with respect to I in the crystal is 0.005×10−4 to 200×10−4.
Claims2
A scintillator, comprising a crystal comprising CsI (cesium iodide) as a host material thereof and Tl, Bi and O,
- wherein a concentration a of Bi with respect to Cs in the crystal is 0.001 atomic ppm≦a≦5 atomic ppm;
- and
- a ratio (a/b) of the concentration a of Bi with respect to Cs in the crystal to a concentration b of O with respect to I in the crystal is 0.005×10−4 to 200×10−4.
Dependencies are inferred from the claim text.