Sorption Measurements in Ultrahigh Vacuum at Constant Pressure

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Introduction. Sorption of gases by surfaces is the primary step in many heterogeneous processes. Because sorption processes are in general pressure-dependent, and very fast at normal pressures, low pressure system are mandatory. In gas-metal interaction studies the flash filament technique with ribbons and filaments and Wagener's technique with evaporated films allow observations at the requisite low pressures. However, these method have two major drawbacks: (1) Since the pressure changes during the sorption experiment, pressure-dependent parameters can only be obtained from indirect evidence; (2) The pressure change in the sorption cell during the experiment may cause significant interaction between the sample … continued below

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15 pages : illustrations.

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Gibson, Richard.; Bergsnov-Hansen, B.; Endow, Noboru. & Pasternak, R. A. October 1963.

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Introduction. Sorption of gases by surfaces is the primary step in many heterogeneous processes. Because sorption processes are in general pressure-dependent, and very fast at normal pressures, low pressure system are mandatory. In gas-metal interaction studies the flash filament technique with ribbons and filaments and Wagener's technique with evaporated films allow observations at the requisite low pressures. However, these method have two major drawbacks: (1) Since the pressure changes during the sorption experiment, pressure-dependent parameters can only be obtained from indirect evidence; (2) The pressure change in the sorption cell during the experiment may cause significant interaction between the sample and the rest of the system and thus experimental data must be corrected for this effect. These drawbacks have been eliminated in a new approach based on a flow system in which the sample is exposed to constant pressure. This new technique has been employed for the study of adsorption and absorption of gases by filaments and evaporated films. This method can also be used for studying gas-metal solution equilibria.

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15 pages : illustrations.

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Digitized from microopaque cards.

Includes bibliographic references (page 9)

Paper to be presented at the Tenth National Symposium of the American Vacuum Society, Boston, Massachusetts, October 16-18, 1963.

This research has been supported in full by the U.S. Atomic Energy Commission, Fuels and Materials Development Branch, Division of Reactor Development Contract AT(01-3)-115 Project Agreement 36, and Controlled Thermonuclear Branch, Division of Research Contract AT(04-3)-425.

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  • Report No.: CONF-209-26
  • Grant Number: AT(01-3)-115
  • Grant Number: AT(04-3)-425
  • SuDoc Number: Y 3.At 7:22/CONF-209-26
  • Accession or Local Control No: metadc1201747
  • Archival Resource Key: ark:/67531/metadc1201747

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  • October 1963

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  • Aug. 27, 2019, 3:53 p.m.

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  • April 1, 2020, 4:07 p.m.

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Gibson, Richard.; Bergsnov-Hansen, B.; Endow, Noboru. & Pasternak, R. A. Sorption Measurements in Ultrahigh Vacuum at Constant Pressure, report, October 1963; Oak Ridge, Tennessee.. (https://digital.library.unt.edu/ark:/67531/metadc1201747/: accessed August 18, 2026), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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