Bismuth activated rare earth oxybromide phosphors and X-ray imag

Details Bismuth activated rare earth oxybromide phosphors and X-ray imag Bismuth activated rare earth oxybromide phosphors and X-ray imag

1976-12-13

1978-01-10

Dixon, Harold A.

Radiant energy

Invisible radiation responsive nonelectric signalling

Luminescent device

2523014H, G01J 158

Patent

active

040681297

ABSTRACT:
Oxybromides of lanthanum and gadolinium activated with bismuth are found to be superior in their conversion efficiency of X-rays to visible light when compared with conventional X-ray phosphors. The incorporation of the ytterbium ion in these phosphor materials produces reduced afterglow when used in X-ray image converter devices such as X-ray image intensifier tubes, fluoroscopic screens, and radiographic screens.

REFERENCES:
patent: RE28592 (1975-10-01), Rabatin et al.

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