G - Physics – 21 – K
Patent
G - Physics
21
K
23/149, 117/22
G21K 4/00 (2006.01) C09K 11/08 (2006.01) C09K 11/66 (2006.01) C09K 11/67 (2006.01) C09K 11/88 (2006.01)
Patent
CA 1215212
PHOTOLUMINESCENT PHOSPHORS AND X-RAY IMAGING SYSTEMS UTILIZING SUCH PHOSPHORS Abstract of the Disclosure An X-ray imaging system includes a phosphor that exhibits a fast-acting photoluminescent response both in luminescing upon X-ray stimulation and ceasing to luminesce upon cessation of X-ray stimulation. The phosphor has the general formula A2MX6 wherein A is selected from Cs, Rb, Na and K; M is selected from Ti, Zr, Hf, Te and Sn; and X is selected from C1 and Br. In one form the phosphor has a purity with respect to naturally-occurring impurities of at least about 98.0 percent (by weight) and is sufficiently deficient of luminescent activators effective only at very low temperatures that the phosphor luminesces at higher temperatures.
461635
Company General Electric
Eckersley Raymond A.
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