Abstract

Several crystal phosphors have been irradiated by ultraviolet wavelengths from 500 A to 1700 A. The emission spectra of all were found to be independent of exciting wavelength. The quantum efficiencies of Zn₂SiO₄:Mn, CaSiO₃:Pb:Mn, and ZnO:[Zn], relative to sodium salicylate, increased with decreasing excitation wavelengths below 1000 A. It is suggested that this increase may be accounted for by internally emitted electrons. Several tungstate and titanate phosphors showed minima in their excitation spectra at about 1100 A, with increases for longer or shorter exciting wavelengths. Anomalous results are reported for ZnS:Ag, BaSi₂O₅:Pb, and Mg₆As₂O₁₁:Mn.

© 1959 Optical Society of America

Quantum Efficiency Measurements on Several Phosphors under Excitation in the Extreme Ultraviolet

Donald H. Thurnau
J. Opt. Soc. Am. 46(5) 346-349 (1956)

The CaSiO₃:(Pb+Mn) Phosphor

John B. Merrill and James H. Schulman
J. Opt. Soc. Am. 38(5) 471-479 (1948)

Optical Properties of Zinc Sulfide in the Vacuum Ultraviolet*

J. T. Cox, J. E. Waylonis, and W. R. Hunter
J. Opt. Soc. Am. 49(8) 807-810 (1959)

Optical and Photoelectric Properties of Thin Metallic Films in the Vacuum Ultraviolet*

W. C. Walker, O. P. Rustgi, and G. L. Weissler
J. Opt. Soc. Am. 49(5) 471-475 (1959)

Photoionization Analysis by Mass Spectroscopy

G. L. Weissler, J. A. R. Samson, M. Ogawa, and G. R. Cook
J. Opt. Soc. Am. 49(4) 338-349 (1959)