Phosphor having reduced afterglow and method for manufacturing s

Details Phosphor having reduced afterglow and method for manufacturing s Phosphor having reduced afterglow and method for manufacturing s

1995-01-24

1996-05-21

Bonner, Melissa

Compositions

Inorganic luminescent compositions

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

423263, 423518, C09K 1184

Patent

active

055186580

ABSTRACT:
A phosphor for a high energy radiation detector is formed by a rare earth oxisulfide having the general sum formula (M.sub.1-x Ln.sub.x).sub.2 O.sub.2 S, wherein M is at least one element of the group Y, La and Gd, Ln stands for at least one element of the group Eu, Ce, Pr, Tb, Yb, Dy, Sm and Ho, and whereby (2.times.10.sup.-1).gtoreq..times..gtoreq.(1.times.10.sup.-6), which also contains molybdenum in a proportion between 10.sup.-1 and 10.sup.-6 mol percent for reducing the afterglow of the phosphor.

REFERENCES:
patent: 4863882 (1989-09-01), Matsuda 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.

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