巻号一覧
20 巻 (1972)
- 4 号 p. 255-
- 3 号 p. 167-
- 2 号 p. 101-
- 1 号 p. 1-
20 巻, 1 号
選択された号の論文の11件中1～11を表示しています
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KAZUMITSU NAKAMURA, SINGO AOKI, YASUO NAKAJIMA, HIROSHI DOI, HIFUMI TA ...1972 年 20 巻 1 号 p. 1-9
発行日: 1972/03/31
公開日: 2011/07/05
ジャーナル フリーThe ion microanalyzer(IMA)analyzes the secondary ions sputtered from the target which has been bombarded by the primary ions. In the analysis of insulating materials by an IMA, the electrostatic charge accumulated on the specimen surface interrupts the detection of the secondary ions. In this paper we report that, with the use of a low energy electron gun, the interruption mentioned above is prevented effectively and it is able to analyze steadily the secondary ions sputtered from insulating materials.抄録全体を表示PDF形式でダウンロード (7222K) -
TATSUO ARIKAWA, TAKAYASU MOCHIZUKI, GORO MIYAMOTO1972 年 20 巻 1 号 p. 11-22
発行日: 1972/03/31
公開日: 2011/03/01
ジャーナル フリーAn ion source for studying low energy ion-molecule reactions is described. The ion source is equipped with a rf quadrupole mass filter which provides ionic species of masses up to 50 amu and delivers mass selected ion beams of energies from several tens of eV down to 1 eV or less. The beam intensity ranges from 10-9 A at high energy to 10-12 A at low energy.The energy profiles of the ion beam were measured using an energy analyzer of a stopping potential type. Results were further checked by the time of flight method. The spatial profiles of the beam were also measured.抄録全体を表示PDF形式でダウンロード (3074K) -
野瀬 直樹, 小寺 熊三郎, 槙田 勉1972 年 20 巻 1 号 p. 23-33
発行日: 1972/03/31
公開日: 2011/07/05
ジャーナル フリーFollowing Part I, design factors of the ratemeter and reversible decade counter for the pulse counting apparatus are discussed. The resolving time of the ratemeter is adjustable for 0.4μsec and 40μsec. Counting accuracy is within 1% on all ranges at duty factor up to 90%. The resolving time of the decade counter is about 30 nsec, and its gate time is selective from 0.01 sec to 315 sec, and its output codes are fed to D-A converter. Also, this decade counter has a subtract gate for synchronous counting. The overall pulse counting apparatus was tested by means of both square pulses and photomultiplier output pulses, and the results are satisfactory for particle counting.抄録全体を表示PDF形式でダウンロード (839K) -
小寺 熊三郎, 楠 勲, 崎山 篤宏1972 年 20 巻 1 号 p. 35-49
発行日: 1972/03/31
公開日: 2011/07/05
ジャーナル フリーThe molecular beam apparatus used for the measurements of total collision cross sections of potassium and rare gases is shown in detail. A new type of the scattering chamber with a variable length is used to eliminate the error of the effective scattering length. To measure the pressure of the rare gases in the scattering chamber an ionization gauge is connected directly to the scattering chamber. The sensitivities of the ionization gauge for the rare gases are calibrated by a McLeod gauge. To eliminate the mercury drag effect in the calibration, the cut-off position of the McLeod gauge is cooled with dry ice. The magnitudes of the effect are in good agreement with those calculated by Takaishi's theory. Effective total cross sections for the scattering of potassium by He, Ne, Ar, Kr, and Xe have been measured in the velocity range, 400-1200 m/sec, of potassium beam. Corrections for the angular resolution are calculated by a general method derived by the present authors. The correction values are compared with those calculated with Busch's formula. To estimate true total cross sections, the effective total cross sections are corrected for the thermal motion of the scattering gases by means of the method of Berkling et al. The velocity dependences of the total cross sections in the potassium-argon, potassium-krypton, and potassium-xenon systems are shown to be explained by the Van der Waals potential, —C/γ5, where s=6. Glory undulations are observed for the potassium-xenon system. For neon the velocity dependence can not be explained by s=6. For helium the correction factors for the thermal motion of the scattering gas are large and the value of s can not be determined unambiguously. To estimate the Van der Waals constants from the total cross sections, the SLL approximation formula is used and the values of 231, 337, and 515×10-60erg·cm6 are obtained for CK-Ar, CK-Kr, and CK-Xe, respectively. These values are in good agreement with the theoretical ones of Dalgarno and Davison. For the potassium-xenon system the potential parameters of L-J(12, 6)are estimated from the glory undulations, giving 2.3×10-14 erg and 4.7Åforεandγm, respectively.抄録全体を表示PDF形式でダウンロード (1174K) -
Study of Negative Ion Formation by Electron Impact II. C- and O- Ion Formations from Carbon MonoxideKAZUO ARAKAWA, TOSHIO SUGIURA1972 年 20 巻 1 号 p. 51-62
発行日: 1972/03/31
公開日: 2011/03/01
ジャーナル フリーThe negative ions C- and O- produced in the dissociative resonance electron capture(DREC)and ionpair formation(IPF)from carbon monoxide have been measured by means of the RPD method using a single focusing mass spectrometer. In the DREC, the cross section of the C- ion formation is2×10-22 cm2 at the peak maximum, which is about 10-3 times for that of theO- ion formation. Within the resolution of this method, the electron energy dependence of the cross section of the C- ion formation near the threshold, as well as that of theO- ion, shows probably vertical onset, and the threshold energy of the C- ion is0.34±0.05eV higher than that of theO- ion. The shapes of the energy dependence suggest that the potential energy curves of the compound states cross to the respective dissociation limit in the Franck-Condon region, therefore, these ions have no kinetic energy at their thresholds. Consquently, the difference of the threshold energies means the difference of the electron affinities. From this point of view, the electron affinity of the C atom is estimated to be 1.22±0.05eV, taking1.465±0.005eV for the electron affinity of the oxygen atom. The potential energy curves of the compound molecular-negative ion states of CO are also discussed. The energy dependence of the cross sections of the C- and O- ion formations in the IPF processes has also been measured. The step functional curves involved one and two excited levels were observed for C- and O- ions, respectively. The results were also confirmed by using CO containing 56% of 13C and the same results were obtained, and any isotope effect neither for cross section nor for threshold energy has been observed within the experimental accuracy.抄録全体を表示PDF形式でダウンロード (818K) -
松本 龍太郎, 鈴木 良一, 佐藤 公隆, 山口 直治1972 年 20 巻 1 号 p. 63-72
発行日: 1972/03/31
公開日: 2010/06/28
ジャーナル フリーA computer system was developed for reading on automatically an optical density of masss pectral line obtained by a solid mass spectrometric analysis and for typing out an analytical value in a desired sample, by combining a microphotometer with IBM 1800 computer. With the development of this system, reproducibility and accuracy were improved in a solid mass analysis. The time hitherto necessary for an operation of microphotometer was shortened from about five hours to two hours, in which only five. minutes are necessary to operate the setting of condition for manual operation. And then, this system can be extensively applied to the analysis of pattern, not only in a solid mass spectrometric analysis, but also in X-ray and electron diffractions.抄録全体を表示PDF形式でダウンロード (2845K) -
岡本 真実, 野村 雅夫, 相田 昌男, 垣花 秀武1972 年 20 巻 1 号 p. 73-80
発行日: 1972/03/31
公開日: 2011/07/05
ジャーナル フリーA precise and quick measurement of the isotope ratio of uranium by means of surface ionization technique has been investigated using a Varian MAT CH-5mass spectrometer. Adopting a zero-point correction and a triple filament method, the relative standard deviation of the ratio 235U/ 238U was reduced to 0.1% and the measuring time was within an hour.抄録全体を表示PDF形式でダウンロード (629K) -
SATOSHI OKADA, SETSUO TANIGUCHI1972 年 20 巻 1 号 p. 81-84
発行日: 1972/03/31
公開日: 2011/07/05
ジャーナル フリーThe lithium contents of three kinds of the aluminium samples were determined by the method of stable isotope dilution. The results obtained are as follows: 99.9% purity aluminium:(5.5±0.3)×10-9 g/g, 99.999% purity aluminium:(3.3±0.2)×10-9 g/g, and zone melted aluminium:(1.7±0.2)×10-8 g/g. The lithium contents in the purified waters and hydrochloric acids used for extraction of lithium from aluminium were also determined to be:(1.335±0.005)×10-10 g/ml(watera)), (2.6±0.2)×10-12 g/ml(waterb)), (2.6±0.2)×10-10 g/ml(hydrochloric acidc))(5.4±0.4)×10-11 g/ml(hydrochloric acidd)), and(2.83±0.05)×10-12g/ml(hydrochloric acide)).抄録全体を表示PDF形式でダウンロード (340K) -
有田 喜美子, 篠崎 敦子, 吉川 要三郎1972 年 20 巻 1 号 p. 85-87
発行日: 1972/03/31
公開日: 2011/03/01
ジャーナル フリーThe reaction mechanism of vinyl interchange reaction was investigated using acetic acid labeled with O18 as tracer. In the interchange reaction of vinylacetate and acetic acid using mercuric(II)salts(HgSO4, HgO, 3HgO·SO3)as catalyst, the following experiment was performed to reveal the severed parts in these compounds.
CH3CO18O18H+CH3COOCH=CH2 ⇔ CH3CO18O18CH=CH2+CH3COOH By the obtained determining results of O18concentration in the reaction equilibrium, the concentration ratio of O18atomic percentage became 1. Thus it was confirmed by this experiment that the reaction occurred by exchaning the vinyl group of vinylacetate and hydrogen in carboxyl group of acetic acid.抄録全体を表示PDF形式でダウンロード (287K) -
中山 充, 江口 鎮子, 松尾 昭彦, 林 修一, 菱田 真三郎, 加藤 義昭1972 年 20 巻 1 号 p. 89-96
発行日: 1972/03/31
公開日: 2011/03/01
ジャーナル フリーThe mass spectra of some methoxycoumarins(IV, V and VI)are recorded In Figs.1-3. The fragmentation is discussed on the basis of high resolution data and deuterium labeling(Tables 1-7). The results illustrate that the observed fragmentation patterns are of considerable utility in the application of mass spectrometry to structure elucidation in this series(Schemes 1-3).抄録全体を表示PDF形式でダウンロード (483K) -
TOSHIO NAGATANI, MASAYUKI HIRAGA, KENJI YOSHIHARA, TAKANOBU SHIOKAWA1972 年 20 巻 1 号 p. 97-99
発行日: 1972/03/31
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (209K)
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