Journal of the Mass Spectrometry Society of Japan
Online ISSN : 1880-4225
Print ISSN : 1340-8097
ISSN-L : 1340-8097
Search
Advanced search
OR
Browse
Search
Volume 14, Issue 1
Displaying 1-9 of 9 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • Earth Science and Mass Spectrometry
    Minoru KOZIMA
    1966 Volume 14 Issue 1 Pages 1-14
    Published: March 01, 1966
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.14.1
    JOURNAL FREE ACCESS
    Download PDF (1966K)
  • On the Surface Ioniazation of Rare Earth Elements
    TAKUJI KOMORI, SHUZO TAMURA, KATSUBUMI GUNJI, KIMIKO TOIDA
    1966 Volume 14 Issue 1 Pages 15-22
    Published: March 01, 1966
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.14.15
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A mass spectrometric study has been made of the influence of the filament temperature on ion production, the ratio of oxide ion(MO+)to element ion(M+)and the relative ionization efficiency of rare earth elements. From the present experimental results, it has been found that:(1)In the triple-filament method, light rare earths(from La to Eu)are generally ionized at lower side-filament temperatures than are heavy rare earths(from Gd to Lu). Exceptionally Eu and Yb are ionized at the lowest side-filament temperature in light and heavy rare earths, respectively. (2)In both triple-and single-filament methods, the ratio of oxide ion to element ion decreases with the increase in the atomic number of light rare earths. Heavy rare earths also show the same tendency. In triple filament method this ratio is not largely changed by the side-filament temperature, though it is sharply dependent on the vacuum of the ion source. (3)In the triple filament method, the ionization efficiency of light rare earths is larger than that of heavy rare earths by about one order.
    View full abstract
    Download PDF (846K)
  • Isotopic Measurement of Chromium Induced by Cosmic Rays in Iron Meteorites.
    MASAKO SHIMA, MASATAKE HONDA
    1966 Volume 14 Issue 1 Pages 23-34
    Published: March 01, 1966
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.14.23
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Stable chromium nuclides produced by cosmic rays were measured by the surface ionization method applied with a chromium fraction extracted from several iron meteorites. A solid source mass spectrometer, MS-5, manufactured by AEI, England, was used for the determination of theisotopic ratios. It was found to be useful to apply the single filament technique using a tungsten ribbon. Repeated experiments using a microgram quantity of reagent chromium gave satisfactory small deviation throughout the course of this work which extended more than one year. The result with the reagent was in good agreement with natural chromium isotopic composition that appeared in literature. A marked enrichment of 54Cr, 53Cr and 5050;Cr due to cosmic ray products could be observed in chromium isolated by solvent extraction from meteorite solutions. An isotopic dilution analysis using enriched50Cr or 52Cr was made to obtain absolute content of these cosmogenic nuclides. The overall contents of53Cr and 54Cr were found to be in the range of13-25ppb in several meteorites. The experimental procedure is described in detail here.
    View full abstract
    Download PDF (1140K)
  • Analysis of Mass Spectra with Digital Computing Methods(II)
    MINORU TSUDA
    1966 Volume 14 Issue 1 Pages 35-44
    Published: March 01, 1966
    Released on J-STAGE: March 01, 2011
    DOIhttps://doi.org/10.5702/massspec1953.14.35
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Digital computing methods for4components mass spectra reported in the previous work were extended up to7, 10and17components mass analyses. Pattern coefficients of each unicomponent and the spectra of the blending samples were measured and analyzed. It is shown that these methods are applicable for the routine analytical work also. The methods were also applied to the weighted least squares methods. Barnard and Fox's method was applied to4components mass spectra reported in the previous work. The average of the standard deviations of the results was0.156mol%which was twice as worse as that without weight. In the new method, the weights for the mass peaks were adjusted so that they give nearly equal residuals. The results thus obtained were considerably improved and had the standard deviations of about0.037mol%.
    View full abstract
    Download PDF (1152K)
  • Characteristic curve for Ilford Q-2Plate on Double Focusing Spark Source Mass Specttrograph
    EMIKO SUDO, TSUTOMU TAKAHASHI, MAKOTO YASUDA
    1966 Volume 14 Issue 1 Pages 45-50
    Published: March 01, 1966
    Released on J-STAGE: July 05, 2011
    DOIhttps://doi.org/10.5702/massspec1953.14.45
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The characteristic curve for mass spectrum have been studied.The characteristic curve was effected by the optical system of the microphotometer.Long linear density region of the characteristic curve was got by the microphotometer with the narrow effective width of illumination area. On intensity scale, use of the isotope abundance ratio was better than use of the monitor current.The smooth characteristic curve was given by the two step method. γand linear density region of Ilford Q-2 plate for platinum mass spectrum were following; γ=0.8-0.9, D=0.4-1.0.
    The characteristic curve for mass spectrum was similar to one for radiant spectrum at 1, 500Å region.
    View full abstract
    Download PDF (636K)
  • [title in Japanese]
    1966 Volume 14 Issue 1 Pages 52-55
    Published: March 01, 1966
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.14.52
    JOURNAL FREE ACCESS
    Download PDF (434K)
  • Erratum to : Ion Optics
    1966 Volume 14 Issue 1 Pages 55a
    Published: 1966
    Released on J-STAGE: July 05, 2011
    DOIhttps://doi.org/10.5702/massspec1953.14.1_55a
    JOURNAL FREE ACCESS
    Download PDF (43K)
  • Erratum to : Ion Optics
    1966 Volume 14 Issue 1 Pages 55b
    Published: 1966
    Released on J-STAGE: July 05, 2011
    DOIhttps://doi.org/10.5702/massspec1953.14.1_55b
    JOURNAL FREE ACCESS
    Download PDF (43K)
  • Erratum to : Ion Optics(V)
    1966 Volume 14 Issue 1 Pages 55c
    Published: 1966
    Released on J-STAGE: February 09, 2012
    DOIhttps://doi.org/10.5702/massspec1953.14.1_55c
    JOURNAL FREE ACCESS
    Download PDF (43K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top