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Volume 24 (1976)
- Issue 4 Pages 265-
- Issue 3 Pages 199-
- Issue 2 Pages 153-
- Issue 1 Pages 1-
Volume 24, Issue 2
Displaying 1-5 of 5 articles from this issue
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KUNIO YAGI, HIROSHI MIMA, YASUO FUJII, FUTOSHI KANEMATSU1976 Volume 24 Issue 2 Pages 153-161
Published: June 30, 1976
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe trajectory of the electron injected in the127° cylindrical electrostatic spdctrometer(the main path radius is 90 mm and the slit width is0.5mm)is numerically computed in a second order approximation, and the results are compared with the Wollnik theory. His theory is also effective for the inhomogeneous field; but the numerical analysis is necessary to determine the accurate main path conditions. The position of the electron at the exit can be given in an accuracy less than 0.04percent by a second order solution. With the aid of this solution, the energy distribution of the electron beam coming out through the spectrometer, which has a movable collimator, is computed. The resolution is determined by the main path radius and the beam width at the ideal boundary.View full abstractDownload PDF (562K) -
KAZUMITSU NAKAMURA, YOSHIHARU HIRAHARA, ATSUSHI SHIBATA, HIFUMI TAMURA1976 Volume 24 Issue 2 Pages 163-172
Published: June 30, 1976
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSIn the analysis of insulating materials by an ion microprobe analyzer(IMA), the electrostatic charge accumulated on the sample surface may interrupt the detection of the secondary ions. But the interruption can be effectively prevented by use of a low energy electron gun. In-depth analysis of phospho-silicated glass, surface observation of granite and quantitative analysis of calcic sandstone was tried. It was made clear that the insulating materials could be analyzed stably as well as the conductive materials when the analytical conditions had been optimizedView full abstractDownload PDF (1652K) -
MAYUMI SOMENO, HIROSHI SAITO, MUTSUHIRO KOBAYASHI1976 Volume 24 Issue 2 Pages 173-180
Published: June 30, 1976
Released on J-STAGE: March 01, 2011
JOURNAL FREE ACCESSIn analysis of hydrogen in metals and alloys by SIMS, control of the hydrogen blank mainly due to residual gases is a persistent problem. Contrarily, this problem becomes less important in case of deuterium analysis. The prescribed amounts of deuterium were introduced into a pure titanium and a beta-titanium alloy (Ti-6.6wt%Fe) by the gas reaction method. Intensities of the various secondary ions sputtered from each sample were measured by the Hitachi Ion Microanalyzer with primary ions of Ar+. Energy distributions of the various secondary ion species were measured with the energy window of about15eV width. The effects of oxygen gas pressure in the target chamber and the bulk deuterium concentrations on the shape of energy distribution curves are discussed. For all samples, intensity of D- ions is higher than that of D+ ions, especially at higher energy ranges. With increasing the deuterium concentration: a) intensities of D+and D- ions from Ti-D system increased, but their shape of distribution curves remained unchanged. b) not only the intensities but also their shape of distribution curves of D- ions from Ti-6.6%Fe-D system varied, but no change was observed in the shape of the curve of D+ ions. The change in the intensities was more remarkable at the higher energy range. By setting the position of energy window at higher energy range, the linearity increased on the relation between the intensity of D- ions and the bulk deuterium concentration for Ti-6.6%Fe-D system. Intensity and shape of the energy distribution curve of Ti+, TiO+ and O+ ions, respectively, ejected from a titanium dioxide (rutile) are compared with those measured on a pure titanium with introduction of oxygen gas into the target chamber; origin of the ion species observed is briefly discussed.View full abstractDownload PDF (796K) -
KUNIO KAI, ICHIKAZU HAYASE1976 Volume 24 Issue 2 Pages 181-188
Published: June 30, 1976
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSGranitic and gneissic rocks of the Kangchenjunga range, Eastern Nepal, were analysed for Rb-Sr age and initial 87Sr/86Sr ratio. Biotite and muscovite ages are ranging from 11m. y. to 16m. y. and from 10m. y. to 17m. y. respectively, which seem to show the final geologic event of the Himalayan granite. The short range of these age data seems to reflect the rapid cooling rate of the Himalayan rocks. The age of tourmalin granite was not obtained from its whole rock isochron, but from the internal isochron 12m. y. for the Notite-muscovite-whole rock and 29m. y. for the potassium feldspar-whole rock, which may correspond to the young mineral ages of the Kangchenj unga gneisses. The Kangchenj unga gneiss and its augen gneiss defined the same whole rock isochron of 455m. y. and gave initial87Sr/86Sr ratio of 0.724. However, potassium feldspar mineral ages of these gneisses are young and scattered widely from 98m. y. to 270m. y., which suggest partial rejuvenation by the later geologic events.View full abstractDownload PDF (694K) -
TAKEO HIGASHINO, MITSUO UCHIDA, EISAKU HAYASHI1976 Volume 24 Issue 2 Pages 189-198
Published: June 30, 1976
Released on J-STAGE: March 01, 2011
JOURNAL FREE ACCESSMass spectra of 1-methyl (or phenyl)-1 H-pyrazolo[3, 4-d] pyrimidine (Io), 4-substituted-1-methyl (or phenyl)-1 Hpyrazolo [3, 4-d] pyrimidines (Ia to Ie) and 4-substituted-4, 5-dihydro-1-methyl-1H-pyrazolo [3, 4-d] pyrimidines (II) were examined. The main fragmentation of I proceeds by two dissociation paths. One is the formation of pyrazolo [3, 4-d] pyrimidinium cation1or the molecular ion of Io caused by the elimination of4-substituent. And the fragmentation of condensed pyrimidine ring of the resulting ion I or Io leads to pyrazolyne radical ion 3 by the loss of hydrogen cyanide or cyano radical in successive steps. Another is the formation of cyclic ion (8, 9 and 14) or diazatropyrium type ion (5' and 10') caused by the migration of 4-substituent with the loss of hydrogen radical. The loss of diazomethyl or diazophenyl radical originated from the condensed pyrazole ring at the first step is peculiar to mass spectra of1-methyl (or phenyl)-4-phenyl-1H-pyrazolo [3, 4-d] pyrimidine (Ie). The main fragmentation of II is the elimination of 4-substituent to form pyrazolo [3, 4-d] pyrimidinium ion 20.View full abstractDownload PDF (760K)
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