Shinku
Online ISSN : 1880-9413
Print ISSN : 0559-8516
ISSN-L : 0559-8516
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Volume 14, Issue 3
Displaying 1-4 of 4 articles from this issue
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  • The Axial Flow Molecular Pump (2)
    Tadashi SAWADA, Kenji MURAKAMI
    1971 Volume 14 Issue 3 Pages 75-82
    Published: March 20, 1971
    Released on J-STAGE: September 29, 2009
    DOIhttps://doi.org/10.3131/jvsj.14.75
    JOURNAL FREE ACCESS
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  • Physical Adsorption of Mixed Gases at Very Low Pressures
    Yutaka TUZI, Masanori KOBAYASHI
    1971 Volume 14 Issue 3 Pages 83-88
    Published: March 20, 1971
    Released on J-STAGE: January 28, 2010
    DOIhttps://doi.org/10.3131/jvsj.14.83
    JOURNAL FREE ACCESS
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    Adsorption of mixed gases, N2-CO, CO-CO2 and Kr-CO, on a Pyrex glass surface were observed at the pressure range of 10-6 to 10-8Torr and at the temperature of 77.4°K. The amounts of adsorption for component gases were measured by using the thermal desorption method for various adsorption times (i.e. cooling times of the adsorbent). The results show that the gas components with higher activation energy of desorption replace the components with lower activation energy of desorption. The replacement of gases physisorbed at low temperature and at low coverage suggests the heterogeneous nature of the Pyrex glass surface which was so far deduced from the analysis of adsorption isotherms.
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  • Interaction of Oxygen with Hot Tungsten Filament
    the Effect of the Wall of Measuring Cell
    Nobuyuki HAYASHI, Jiro WATANABE
    1971 Volume 14 Issue 3 Pages 89-93
    Published: March 20, 1971
    Released on J-STAGE: September 29, 2009
    DOIhttps://doi.org/10.3131/jvsj.14.89
    JOURNAL FREE ACCESS
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    The interaction of oxygen with a hot tungsten filament was studied by the technique of isotopic mixing. The tungsten filament placed in the center of a spherical glass cell was flashed in isotopic oxygen 1802 of 10-6 Torr. The cell wall was kept at several constant temperatures during the flashing. Isotopic carbon monoxide C 18O observed at the inital stage rapidly diminishes within 30 min. At the next stage the increase of isotopic gases C18O2, C18OO, C180 and CO are observed, but they begin to decrease after 6090 min. Moreover, the evolution of these gases are decreased to a large extent by cooling the cell wall to lower temperature such as-72°C. It is concluded from these results that isotopic carbon monoxide and carbon dioxide are produced from the surface of the glass cell rather than caused by the interaction of oxygen with the hot tungsten surface with the exception of the initial stage.
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  • [title in Japanese]
    [in Japanese]
    1971 Volume 14 Issue 3 Pages 94-95
    Published: March 20, 1971
    Released on J-STAGE: September 29, 2009
    DOIhttps://doi.org/10.3131/jvsj.14.94
    JOURNAL FREE ACCESS
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