Work Function of Lead

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Abstract
The work functions of twelve lead surfaces have been determined by measurement of their contact differences of potential with respect to barium reference surfaces of known work function. The lead surfaces were prepared by subjecting Hilger's spectroscopic lead to intensive outgassing followed by fractional distillation, redistillation, and deposition on glass targets. The barium surfaces were prepared by a similar standardized technique which yields surfaces constant and reproducible to 0.01 ev. Measurement was by the electron beam method, and the time lapse between deposition and measurement of a fresh surface was five seconds.

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