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Title: Rare earth phosphors and phosphor screens

Abstract

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.

Inventors:
 [1];  [2];  [2]
  1. (Palo Alto, CA)
  2. (Sunnyvale, CA)
Issue Date:
OSTI Identifier:
864031
Patent Number(s):
4297584
Assignee:
Lockheed Missiles & Space Company, Inc. (Sunnyvale, CA) OSTI
DOE Contract Number:  
AT(04-3)-836
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
rare; 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; /250/252/

Citation Formats

Buchanan, Robert A., Maple, T. Grant, and Sklensky, Alden F. Rare earth phosphors and phosphor screens. United States: N. p., 1981. Web.
Buchanan, Robert A., Maple, T. Grant, & Sklensky, Alden F. Rare earth phosphors and phosphor screens. United States.
Buchanan, Robert A., Maple, T. Grant, and Sklensky, Alden F. Thu . "Rare earth phosphors and phosphor screens". United States. https://www.osti.gov/servlets/purl/864031.
@article{osti_864031,
title = {Rare earth phosphors and phosphor screens},
author = {Buchanan, Robert A. and Maple, T. Grant and Sklensky, Alden F.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {1}
}

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