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Volume 18 (1970)
- Issue 4 Pages 1214-
- Issue 3 Pages 1063-
- Issue 2 Pages 966-
- Issue 1 Pages 866-
Volume 18, Issue 2
Displaying 1-9 of 9 articles from this issue
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HIROHIKO EZOE1970 Volume 18 Issue 2 Pages 966-972
Published: June 01, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSTheoretical treatment on the variation of pattern and peak shape of mass spectra with scanning mode and speed is presented. Two problems are considered separately: The first is the dependency of peak spacing and peak width on the scanning mode, while the second is the distortion of individual peak shape depending on the scanning speed and a response of recording system. Several examples are taken up and discussed.View full abstractDownload PDF (677K) -
HIROHIKO EZOE1970 Volume 18 Issue 2 Pages 974-980
Published: June 01, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSA very simple method is proposed to adjust a.c. load currents minutely only by applying a resistor in series with the input of a variable transformer. The principle and the experimental results are given together with the description about an attempt to improve the stability of output currents by using an electric bulb as a series resistor.View full abstractDownload PDF (376K) -
SADAO MATSUO1970 Volume 18 Issue 2 Pages 982-993
Published: June 01, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSRetentivity of volatiles including water, rare gases and nitrogen of the earth was examined. A fairly high fraction of volatiles is still present in the interior of the earth. Xenon seems to be an exception. On the basis of the homogeneous primitive earth model, a binary source material is necessary for both the earth and Venus to account for the difference in abundances of volatiles on these planets.View full abstractDownload PDF (1097K) -
YASUO FUJII, FUTOSHI KANEMATSU1970 Volume 18 Issue 2 Pages 994-1003
Published: June 01, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSActivation treatment of commercially avairable Cu-Be(2%)alloy has been investigated. The characteristics of secondary electron emission and the decay of δ due to the electron bombardment have been measured for the samples treated at varions condition. The δmax values of these treated samples mainly distribute mostly between 4 and 6, and the yield of almost these treated samples decreased to about 80% of their values. In our experiment, the best result was obtained under the heat treatment at 800°C for 15 minutes keeping at the oxygen pressure P0=6×10-3 Torr and then for subsequent 10 minutes in high vacuum. Although the δmax -values for these samples are a little low, between 4 and 5, no decay of the yield are observed after 15 hours' electron bombardment at 400 eV. The electron diffraction study shows that the surface products for the most of these samples are only BeO.View full abstractDownload PDF (839K) -
NAOKI NOSE, YOICHI MARU, TSUTOMU MAKITA, KUMASABURO KODERA1970 Volume 18 Issue 2 Pages 1004-1012
Published: June 01, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSAn experimental method was developed in which not only the initial ions and the charge transfer ions but also the neutral products of collision processes can be detected simultaneously on the photographic plates in a double focusing mass spectrograph. The relative cross sections for charge transfer process have been measured for Fe+, Fe2+, Fe3+, Fe4+, and Fe5+ moving through argon in the colliion chamber with the velocities corresponding to accelerating potential 13000 volts. The relative cross section values depend upon the heat of reaction, Fej++Aro=Fe(j-1)++Ar++ΔE, and fast neutral iron atoms were detected on the photographic plate, Ilford Q2, in the “camera”.View full abstractDownload PDF (699K) -
YUKIHIKO HORIUCHI1970 Volume 18 Issue 2 Pages 1014-1021
Published: June 01, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe reaction of atomic nitrogen produced by microwave discharge with methanol vapor at room temperature(26°C)has been investigated by mass spectrometry. Hydrogen cyanide was the only nitrogen-containing product of detectable amount. From the results of experiments in N-CH3OD system, we came to the conclusion that nitrogen atoms react with methanol by C-O bond rupture. The over-all rate constant of nitrogen atom attack on methanol was estimated to be 8.41×105 1·mol+1·sec-1.View full abstractDownload PDF (591K) -
KIYOSHI HAMANO, KINJI HIRAMATSU1970 Volume 18 Issue 2 Pages 1022-1034
Published: June 01, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (902K) -
AKIRA TATEMATSU, HIROSHI SAKURAI, HISAO NAKATA1970 Volume 18 Issue 2 Pages 1036-1042
Published: June 01, 1970
Released on J-STAGE: March 01, 2011
JOURNAL FREE ACCESSThe previously reported technique for determination of elemental compositions of organic ions are improved in that both mass differences and relative intensity ratios of accompanying isotopic peaks are examined. As an example, a peak at m/e 94(peak a)of 2-aminopyridine is selected. The observed mass difference(Table1)of two isotopic peaks at m/e 95(peak b and c)suggested that the peak a contains N or both N and O(Table2). However, comparisons of the observed and calculated mass differences and intensity ratios of two peaks at m/e 96(peak d and e)showed that peak a should not contain oxygen atoms(Table 3). We have therefore four possible combinations for peak a at m/e 94. The choice of the correct elemental composition C, H, N, is based on the fact that the observed intensity ratios b:c, a:c, and c:e are all in good agreement with calculated values(Table 4). Some technical features of the present method are also discussed.View full abstractDownload PDF (503K) -
YUZO NAKAGAWA, SAICHI MATSUMOTO, AKIRA TAKAMIZAWA1970 Volume 18 Issue 2 Pages 1044-1054
Published: June 01, 1970
Released on J-STAGE: July 05, 2011
JOURNAL FREE ACCESSThe mass spectra of three new series of thiazole derivatives, II, IV, V, were examined. The first compounds were new spiro[1:2]cycloadduct compounds which were given by the reaction of thiazolium ylids and alkylisothiocyanates, the next compounds also have the same nucleus but have a group, C=NH instead of one of C=S groups. The final compounds were derived from the first compounds by heating in acetic acid solution. The fragmentation mechanisms were discussed with the aid of high resolution measurements and deuterium labelling.View full abstractDownload PDF (654K)
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