X-ray conversion screens

Details X-ray conversion screens X-ray conversion screens

1976-11-11

1977-10-18

Dixon, Harold A.

Radiant energy

Invisible radiation responsive nonelectric signalling

Luminescent device

250460, 2523014H, G01J 158

Patent

active

040547981

ABSTRACT:
An X-ray conversion screen having reduced afterglow without any appreciable loss in the brightness under X-ray excitation comprises a substrate and at least one fluorescent layer applied thereto, the fluorescent layer containing a fluorescent substance which comprises terbium-activated lanthanum or gadolinium oxyhalide having yttrium or lutetium and, as desired, ytterbium added thereto as impurities.

REFERENCES:
patent: RE28592 (1975-10-01), Rabatin
patent: 3617743 (1971-11-01), Rabatin
patent: 3872309 (1975-03-01), DeBelder
patent: 4029851 (1977-06-01), Degenhardt

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