Journal of the Spectroscopical Society of Japan
Online ISSN : 1884-6785
Print ISSN : 0038-7002
ISSN-L : 0038-7002
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Volume 24, Issue 3
Displaying 1-7 of 7 articles from this issue
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  • A Review of Beam-Foil Spectroscopy. II
    Quantum Beat
    Keishi ISHII, Kuniya FUKUDA
    1975 Volume 24 Issue 3 Pages 131-142
    Published: June 30, 1975
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5111/bunkou.24.131
    JOURNAL FREE ACCESS
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  • Temperature Measurement by Maximum Absorbance Comparison Method
    A Resonance Line and Doublet Lines of Lead
    Yukio IDE, Masaaki YANAGISAWA, Kuniyuki KITAGAWA, Tsugio TAKEUCHI
    1975 Volume 24 Issue 3 Pages 143-147
    Published: June 30, 1975
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5111/bunkou.24.143
    JOURNAL FREE ACCESS
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    The measurement of excitation temperature has usually been carried out by comparing intensities of a pair of emission lines. On the other hand, the measurement of lower temperature that can not be achieved by the above method has been required in flameless atomic absorption spectrometry with an electrically heated strip atomizer. To meet this requirement we propose a theory for the measurement of excitation temperatures in atomic absorption spectrometry that uses a pair of lead absorption lines having different lower levels. The theory has been successfully applied to flameless systems using a tantalum and a glassy carbon strip, and also to an air-acetylene fiame system. The equation for calculating the excitation temperature T is given by exp [0.797AR exp (-11240/T)] +14.21 exp [-11.32AR exp (-11240/T)] -15.21 exp (-A) =0 in terms of the apparent absorbance for the lead doublet, A, and of that for the resonance line, AR. It is recommended to use the present method in discussing the degree of dissociation or the effect of chemical inter ferences in practical atomic absorption spetrometry.
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  • Isotopic Analysis of Uranium by Optical Spectral Methods
    I. Determination of 235U/238U Ratios Using a Hollow Cathode Discharge Source
    Hiroyuki FUKUSHIMA, Tokunosuke NAKAJIMA
    1975 Volume 24 Issue 3 Pages 148-155
    Published: June 30, 1975
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5111/bunkou.24.148
    JOURNAL FREE ACCESS
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    An emission spectrometric method for uranium isotopic analysis is described. A specially designed hollow cathode discharge tube was employed as the excitation source. A Shimadzu etalon-grating monochromator (MEG-50) was used as the high-resolution spectrometer. The etalon having cemented optical elements kept high finesse without any adjustment for about 6 months. A 50-mg portion of U3O8 powder sample was directly packed into a graphite cup, which was then loaded in the cathode cavity of the water-cooled hollow cathode discharge tube. It is found that an addition of nitrogen to argon carrier-gas was very effective to increase uranium line intensities. Pulsed-current operation was also effective to increase line intensities. Consequently, a relatively small discharge current (-30mA) was sufficient. The output light was stable for at least 2 hours. Uranium-235 concentrations from 0.684 to 20.0 atomic % can be determined with a relative standard deviation ranging from 1.3 to 0.3%.
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  • The Second Ruling Engine of the Institute for Optical Research
    Masao SEYA, Takeshi NAMIOKA, Isamu KAISE, Fumio MASUDA, Hideyuki NODA
    1975 Volume 24 Issue 3 Pages 156-160
    Published: June 30, 1975
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5111/bunkou.24.156
    JOURNAL FREE ACCESS
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  • Constant Fraction-Zero Crossing Method
    [in Japanese]
    1975 Volume 24 Issue 3 Pages 161-162
    Published: June 30, 1975
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5111/bunkou.24.161
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1975 Volume 24 Issue 3 Pages 163-164
    Published: June 30, 1975
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5111/bunkou.24.163
    JOURNAL FREE ACCESS
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  • Mathematical Basis for Data Processing in Spectroscopy
    (3) Data Fitting-Its Ideal and Reality (II)
    Toru NAKAGAWA, Kozo KUCHITSU
    1975 Volume 24 Issue 3 Pages 165-187
    Published: June 30, 1975
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5111/bunkou.24.165
    JOURNAL FREE ACCESS
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