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The thermionic emission from clean platinum

DuBridge, Lee A. (1928) The thermionic emission from clean platinum. Physical Review, 32 (6). pp. 961-966. ISSN 0031-899X. doi:10.1103/PhysRev.32.961.

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The thermionic emission from thoroughly outgassed platinum in high vacuum has been measured to one-half percent over the temperature range 1360 to 1750°K, the temperatures being measured by careful optical pyrometry. The values obtained for the thermionic constants of the T2 law are, when corrected for the Schottky effect, b=72, 820°K, φ=6.27 volts, A=17,000 amp/cm^2 deg^2. The value of φ is possibly in error by not more than 1 percent because of uncertainties in the temperature scale, and agrees within one-half percent with the value of the photoelectric work function previously obtained. The data confirm the previous announcement that for clean platinum A is 250 times greater than the theoretical value of 60.2 amp/cm^2 deg^2.

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Additional Information:©1928 The American Physical Society. Received 20 August 1928. The author is indebted to Dr. Millikan and the staff of the Norman Bridge Laboratory for the facilities placed at his disposal.
Issue or Number:6
Record Number:CaltechAUTHORS:DUBpr28b
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3662
Deposited By: Tony Diaz
Deposited On:24 Jun 2006
Last Modified:08 Nov 2021 20:11

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