Abstract

Unexpected emission bands have been observed for ZnCdS: Ag high in cadmium. With high Ag, the main emission band under cathode-ray excitation at 10 kv appeared to be shifted to shorter wavelength on increase in current density. Under ultraviolet excitation at −196°C, the apparent shift was resolved into two emission bands, one of which corresponded to the new band that appeared under cathode rays; the other, to the normal band of the unactivated phosphor. With low Ag, edge emission bands appeared under high current density cathode rays and sodium bands under ultraviolet at −196°C.

© 1952 Optical Society of America

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