Thermal Ionization at Hot Metal Surfaces

Thermal Ionization at Hot Metal Surfaces
Author :
Publisher :
Total Pages : 68
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ISBN-10 : UOM:39015077593583
ISBN-13 :
Rating : 4/5 (83 Downloads)

Book Synopsis Thermal Ionization at Hot Metal Surfaces by : Joseph Robert Werning

Download or read book Thermal Ionization at Hot Metal Surfaces written by Joseph Robert Werning and published by . This book was released on 1959 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ionization on hot tungsten, tantalum, and rhenium surfaces was studied. An atomic beam of neutral atoms effused from a Knudsen-type effusion vessel and struck a hot filament of the metal being studied. A temperature- dependent fraction of these atoms was ionized. This filament served as the ion source of a 60-degree-sector single-directional focusing mass spectrometer. According to the Saha-Langmuir theory of surface ionization the temperature dependence of ionization is related to the difference between the ionization potential of the impinging atom and the work function of the surface under consideration.


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