Method of determining lanthanidies in a transition element host

Details Method of determining lanthanidies in a transition element host Method of determining lanthanidies in a transition element host

1975-01-16

1976-02-03

Willis, Davis L.

Radiant energy

Coded record and readers; invisible radiant energy type

2523012R, G01N 2320

Patent

active

039366332

ABSTRACT:
A phosphor composition contains a lanthanide activator element within a host matrix having a transition element as a major component. The host matrix is composed of certain rare earth phosphates or vanadates such as YPO.sub.4 with a portion of the rare earth replaced with one or more of the transition elements. On X-ray or other electromagnetic excitation, trace lanthanide impurities or additives within the phosphor are spectrometrically determined from their characteristic luminescence.

REFERENCES:
patent: 3859525 (1975-01-01), Ashe et al.

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