Journal of the Mass Spectrometry Society of Japan
Online ISSN : 1880-4225
Print ISSN : 1340-8097
ISSN-L : 1340-8097
Volume 9, Issue 17
Displaying 1-12 of 12 articles from this issue
  • Koreichi Ogata
    1961 Volume 9 Issue 17 Pages 3-7
    Published: April 30, 1961
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    Download PDF (853K)
  • Hisashi Matsuda
    1961 Volume 9 Issue 17 Pages 8-14
    Published: April 30, 1961
    Released on J-STAGE: March 01, 2011
    JOURNAL FREE ACCESS
    In the electrostatic analyzer of sector type with a given mean radius and a given openning angle, the focal length of the apparatus depends on the curvature of the central part of the equipotential line in the plane perpendicular to the beam. Therefore, an electrostatic analyzer with variable focal length may be proposed if the field shape near the central beam can be controled electrically without changing the geometry of the apparatus.
    In this paper, a method of such a control is proposed and the variation of the field shape due to this method is described. A small 90° electrostatic analyzer with 162.5 mm mean radius was constructed and the focusing properties of this apparatus investigated. It was possible to focus a sharp radial image and a sharp axial image on a fluorescent screen at any location by the electrical control only.
    Download PDF (1556K)
  • Hirohiko Ezoe, Tomonao Hayashi
    1961 Volume 9 Issue 17 Pages 14-19
    Published: April 30, 1961
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    A. d. c. high voltage stabilizer was designed for the accelerating voltage source of a high resolution masss spectrometer. The amplifier consists of the parallel conncction of a chopper type d. c. amplifier and an audio frequellcy amplifier, and the circuit components affecting to the reference voltage are all immersed in an oil bath of constant temrerature. For simplifying the adjustment of the stabilizer the inductively coupled system was used. An excellent long-time stability of10-4/36hrs. and the rippple voltage of0.3V p-p were obtained at the output voltage of5k V.
    Download PDF (2885K)
  • Hirohiko Ezoe, Tomonao Hayashi
    1961 Volume 9 Issue 17 Pages 20-22
    Published: April 30, 1961
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    A simple a. c. amplifying system for a mass spectrometer is described. Thermally modulated ion currents emitted from triple-filaments heated by 50 c/s a. c. power were amplified and mass spectrum of K was recorded. In the present system, the a. c. component of the ion currents lags in phase about 60° from the supply voltage of the filaments, and it amounted to about 10% of the d. c. component. The results predict the merits of an a, c. amplifier over a colwentional direct-coupled d. c. amplifier in its slmplicity and sensitivity when the ion currents are modulated more deeply.
    Download PDF (1320K)
  • J Okano
    1961 Volume 9 Issue 17 Pages 23-29
    Published: April 30, 1961
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    To extract radiogenic argon from micas and to purify extracted gases, an apparatus was constructed. The procedures for the extraction and the purification were described. Purified gases were analysed by a mass spectrometer and methane and helium were observed as main components of their impurities. Extracation efficiency of radiogenic argon from the muscovite(Mt. Ishikawa, 16-80 mesh)was studied and it was seen that among the total argon extracted during 20hours' heating at 1100°C, more than 99 percent was extracted in 10 hours. Quantitative analyses of radiogenic argon with two kinds of Japanese mica (Mt. Ishikawa, Fukushima-ken and Mt. Daiichi-suisho, Fukushima-ken) and M. I. T. standard biotite 3203 were carried out isotope dilution method. Quantities of radiogenic argon per one gram of these micas were 3.65×10-5cc STP, 2.84×10-5cc STP and 3.87×10-4 cc STP, respectively. K-Ar age of these two kinds of Japanese micas were estimated to be 1.3×108 years and 1.5×108 years respectively. The quantity of radiogenic argon in standard biotite 3203 obtained in this work were in good agreement with those reported by others.
    Download PDF (787K)
  • Ichiro Omura
    1961 Volume 9 Issue 17 Pages 30-37
    Published: April 30, 1961
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    The total yield curves of the ion formation from several paraffinic and olefinic hydrocarbons were measured and the decomposition processes are discussed.The C3H5+and C2H3+ions from the n-C4H10+ions may be formed by the hydrogen molecule abstraction reaction.The fbrmation of the C2H4+ions from the iso-C4H10+ions and the cis-2-C4H8+ions may be attributed to the hydrogen migration reaction, while the C2H5+ions from the iso-C4H10+ions and the cis-2-C4H8+ions may be formcd by the rearrangement of hydrogen atoms.The relative yield of the ion formation seems to closelycorrelated with each decomposition process.
    Download PDF (679K)
  • Takuji Komori, Shuzo Tamura
    1961 Volume 9 Issue 17 Pages 37-39
    Published: April 30, 1961
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    The uranium concentration of the fuel solution in the Water Boiler Type Reactor, which is now in operation at the Japan Atomic Energy Research Institute, was measured by the application of the isotope dilution method using natural uranium as spike isotopes. After mixing completely, the spike solution with the fuel solution, uranium was separated from fission products the extraction method using tetrapropylammonium nitrate-methyl, isobutyl ketone system. The isotopic composition of uranium was then measured by means of a surface ionization type mass spectrometer(CEC21-702B), while the concentration uranium was calculated from the result of the isotopic assay. It has been found that this method can be applied with the satisfying reproducibility to the determination of the uranium concentration in the presence of highly radioactive materials.
    Download PDF (267K)
  • Yoshihiro Masuda, Ichiro Toshibe
    1961 Volume 9 Issue 17 Pages 39-42
    Published: April 30, 1961
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    Download PDF (269K)
  • Yoshihiro Masuda, Ichiro Toshibe
    1961 Volume 9 Issue 17 Pages 40-42
    Published: April 30, 1961
    Released on J-STAGE: March 01, 2011
    JOURNAL FREE ACCESS
    Download PDF (166K)
  • Mass Spectrometry of Inorganic Gaseous Mixtures
    Teruo Hayakawa
    1961 Volume 9 Issue 17 Pages 43-55
    Published: April 30, 1961
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    Download PDF (1402K)
  • [in Japanese]
    1961 Volume 9 Issue 17 Pages 56-58
    Published: April 30, 1961
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    Download PDF (373K)
  • [in Japanese]
    1961 Volume 9 Issue 17 Pages 58-62
    Published: April 30, 1961
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    Download PDF (496K)
feedback
Top