Journal of the Mass Spectrometry Society of Japan
Online ISSN : 1880-4225
Print ISSN : 1340-8097
ISSN-L : 1340-8097
Volume 27, Issue 3
Displaying 1-6 of 6 articles from this issue
  • Andrew J Yencha
    1979 Volume 27 Issue 3 Pages 135-156
    Published: September 30, 1979
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    The technique of measuring the kinetic energy of electrons ejected from atomic or molecular species as a result of collisional energy transfer between a metastable excited rare gas atom and an atom or molecule is known as Penning ionization spectroscopy. Like the analogous photoionization process of photoelectron spectroscopy, a considerable amount of information has been gained about the ionization potentials of numerous molecular systems. It is, in fact, through the combined analyses of photoelectron and Penning electron spectra that affords a probe of the particle-particle interactions that occur in the Penning process. In this paper a short survey of the phenomenon of Penning ionization, as studied by electron spectroscopy, will be presented as it pertains to the ionization processes of simple molecules by metastable excited atoms.
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  • Mitsuru Asano, Hitoshi Kimura, Kenji Kubo
    1979 Volume 27 Issue 3 Pages 157-162
    Published: September 30, 1979
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    A pulse counting method has been used to determine gains of an electron multiplier for various ions. A16-stage box and grid type electron multiplier with copper-beryllium dynodes has been employed in equipment to a single focusing mass spectrometer. The condition, where the gain determined by the pulse counting method becomes almost identical to that by a Faraday cup method for each of various ions, has been discussed.
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  • Mokuyoshi Kishimot, Kenji Yoshihara
    1979 Volume 27 Issue 3 Pages 163-172
    Published: September 30, 1979
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    Luminescence caused by bombardment of ions Cl+, In+, InCl+ and InCl2+ on Al, graphite, phthalocyanine, Cu and Fe was studied under ion acceleration of 20keV. This phenomenon is considered to be closely related to the processes occurring in ion implantation.
    The luminescence consists of atomic spectra originated from the target atoms and the projectile ions, and it also shows characteristic increase of base line intensity at the same regions of wave length for all the targets used in the experiments.
    It is found that all the components of the spectra in the same target are similar for various ions, while the intensity distribution of the spectra of optical emission in ion implantation differs from that in spark and arc sources.
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  • Jun-ichi Iwamura, Hideo Hosotsubo, Nenokichi Hirao
    1979 Volume 27 Issue 3 Pages 173-179
    Published: September 30, 1979
    Released on J-STAGE: March 01, 2011
    JOURNAL FREE ACCESS
    Mass spectra of methyl esters of 2-alkenic acids, and those of terpenic compounds were measured by electron impact ionization.
    The fragmentation patterns of a pair of isomers in methyl esters of nonbranched and branched 2-alkenic acids differ markedly. The fragment ion at m/e113 from nonbranched cis-esters appears more strongly than that from nonbranched transesters, and the fragment ion at m/e87 from nonbranched trans-esters is more abundant, than nonbranched cis-esters.
    The corresponding fragment ion at m/e113 appears characteristically in the mass spectrum of branched cis-esters, but the fragment ion at m/e87 appears only in the mass spectrum of methyl 2-methyl-trans-2-octenate[22].
    On the other hand, the similarity of the fragmentation patterns of a pair of isomers in the mass spectrum of methyl esters of terpenic acids was discussed on the basis of the spectrum of homologous compounds of methyl geranate. It is suggested that the cleavage of alkyl groups of the terpenic comounds of fects the fragmentation patterns.
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  • Juni-chi Iwamura, Hideo Hosotsubo, Nenokichi Hirao
    1979 Volume 27 Issue 3 Pages 181-186
    Published: September 30, 1979
    Released on J-STAGE: July 05, 2011
    JOURNAL FREE ACCESS
    Mass spectra of 22 allyl alcohols were measured by electron impact ionization.
    The moleculer ions are abundant in the mass spectra of lower allyl alcohols.
    The characteristic peaks in the mass spectra of allyl alcohols are the fragment peak at m/e82, M+-H2O. And the structure of the fragment ions appears to be R-_??_. The estimated structure appears to be supported that the fragment ions in the mass spectra of cis-allyl alcohols much abundant than that of trans-allyl alcohols.
    The(M+-H2O)ions in the mass spectra of allyl alcohols would be estimated as the fourmembered ring ions that are produced by1, 4-elimimation through a sixmembered intermediate.
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  • [in Japanese], [in Japanese]
    1979 Volume 27 Issue 3 Pages 187R-215R
    Published: September 30, 1979
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
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