INVESTIGATION OF THE PHOTOELECTRIC WORK FUNCTION OF TITANIUM
PRINCETON UNIV NJ
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Measurements were made at several cathode temperatures T of t he emission current I received from photocells with pure Ti cathodes, upon their exposure to monochromatic ultraviolet light from a G.E. A-H6 high-pressure Hg- arc lamp. The frequency nu of the incident light varied from 2800 to 2450 A, and cathode temperature ranged from room temperature to 571 deg K. The photoelectric work function phi was obtained graphically from the Fowler Phys. Rev. 3845 and 838, 1931 expression logIT squared B log fx, where B is a constant independent of nu and T, and x h nu - phikT, where h and k are the Planck and Boltzmann constants. Construction of the phototubes is described, one with a cylindrical and the other with a plane Ti cathode. Results indicated that phi for pure Ti is si 4.11 v. and that contamination of a Ti cathode may produce an increase or decrease in phi the change is dependent upon the type and amount of contamination.
- Metallurgy and Metallography