Rare earth phosphors and phosphor screens
- Palo Alto, CA
- Sunnyvale, CA
This invention relates to rare earth phosphor screens for converting image carrying incident radiation to image carrying visible or near-visible radiation and to the rare earth phosphor materials utilized in such screens. The invention further relates to methods for converting image carrying charged particles to image carrying radiation principally in the blue and near-ultraviolet region of the spectrum and to stabilized rare earth phosphors characterized by having a continuous surface layer of the phosphors of the invention. More particularly, the phosphors of the invention are oxychlorides and oxybromides of yttrium, lanthanum and gadolinium activated with trivalent cerium and the conversion screens are of the type illustratively including x-ray conversion screens, image amplifier tube screens, neutron imaging screens, cathode ray tube screens, high energy gamma ray screens, scintillation detector screens and screens for real-time translation of image carrying high energy radiation to image carrying visible or near-visible radiation.
- DOE Contract Number:
- AT(04-3)-836
- Assignee:
- Lockheed Missiles & Space Company, Inc. (Sunnyvale, CA)
- Patent Number(s):
- US 4297584
- OSTI ID:
- 864031
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
earth
phosphors
phosphor
screens
relates
converting
image
carrying
incident
radiation
visible
near-visible
materials
utilized
methods
charged
particles
principally
blue
near-ultraviolet
region
spectrum
stabilized
characterized
continuous
surface
layer
particularly
oxychlorides
oxybromides
yttrium
lanthanum
gadolinium
activated
trivalent
cerium
conversion
type
illustratively
including
x-ray
amplifier
tube
neutron
imaging
cathode
ray
energy
gamma
scintillation
detector
real-time
translation
phosphor screen
cathode ray
energy radiation
image carrying
ray tube
incident radiation
scintillation detector
gamma ray
charged particles
rare earth
charged particle
surface layer
visible radiation
phosphor materials
energy gamma
continuous surface
ultraviolet region
image amplifier
carrying radiation
phosphor screens
earth phosphor
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