Phosphor having reduced afterglow

Details Phosphor having reduced afterglow Phosphor having reduced afterglow

1995-07-12

1996-10-08

Bonner, Melissa

Compositions

Inorganic luminescent compositions

Compositions containing halogen; e.g., halides and oxyhalides

264 21, C09K 1184

Patent

active

055628605

ABSTRACT:
A phosphor for a radiation detector is based on a phosphor ceramic of a rare earth oxisulfide with the general sum formula (M.sub.1-x Ln.sub.x).sub.2 O.sub.2 S, wherein M is at least one element from the group Y, La and Gd, Ln is at least one element of the group Eu, Pr, Tb, Yb, Dy, Sm and Ho, and wherein (2.times.10.sup.-1).gtoreq..times..gtoreq.(1.times.10.sup.-6) and which is doped an element D selected from Zr, Ti and Hf and at least one element A selected from Co, Mn and Ni for reducing the afterglow.

REFERENCES:
patent: 4733088 (1988-03-01), Yamada et al.
patent: 5296163 (1994-03-01), Leppert et al.
"A Scintillator Gd.sub.2 O.sub.2 S:Pr, Ce, F for X-Ray Computed Tomography", Yamada et al., J. Electrochem. Soc. vol. 136, No. 9, Sep. 1989 (pp. 2713-2716).
Chemical Abstract citation 81:83554, corrisponding to JP49-15688, Feb. 12, 1974.

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