X-ray luminescent screen

Details X-ray luminescent screen X-ray luminescent screen

1975-09-23

1978-02-21

Cooper, Jack

Radiant energy

Invisible radiation responsive nonelectric signalling

Luminescent device

2523014H, 428539, G01N 23223, G01T 100, C09K 1146

Patent

active

040754952

ABSTRACT:
Luminescent screen, in particular X-ray image intensifier screen, provided with a luminescent alkaline earth metal fluoro-halide which is activated by Eu.sup.2+, contains samarium and has a composition defined by the formula Me.sub.1-p-q Eu.sub.p Sm.sub.q FX, where Me represents barium and/or strontium and X represents chlorine, bromine and/or iodine. Up to 20 mol % of the Ba and/or Sr can be replaced by Ca. Furthermore 0.001 .ltoreq. p .ltoreq. 0.20; 0.001 .ltoreq. q.ltoreq. 0.10; 0.02 .ltoreq. q/p .ltoreq. 0.50.

REFERENCES:
patent: 2522074 (1950-09-01), Urbach
patent: 3163610 (1964-12-01), Yocom
patent: 3657141 (1972-04-01), Chenot
Feofilov "Chem. Abstract", vol. 57, 1962; 5442e.

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