巻号一覧
21 巻 (1973)
- 4 号 p. 263-
- 3 号 p. 203-
- 2 号 p. 117-
- 1 号 p. 1-
21 巻, 1 号
選択された号の論文の12件中1～12を表示しています
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ATSUO ARIKAWA1973 年 21 巻 1 号 p. 1-14
発行日: 1973/03/31
公開日: 2010/06/28
ジャーナル フリーA focusing system achromatic for the momentum deviations has been investigated. The system consists of a pair of alternate gradient electro-magnetic fields whose n-values, n, and nm, were designed ±5, respectively. Experiments were carried out using electrons with energies from 5 to 11 keV for various combinations of the electric field with the magnetic field. The momentum free condition was obtained when and only when the ratio of the electric force to the centrifugal force was equal to -1.抄録全体を表示PDF形式でダウンロード (1184K) -
松田 久1973 年 21 巻 1 号 p. 15-25
発行日: 1973/03/31
公開日: 2010/06/28
ジャーナル フリーSecond order image aberrations are calculated for the famous double focusing mass spectrographs in the world. The influence of the fringing field is introduced as a transformation at the ideal field boundary. The focusing properties of the apparatus built at Minnesota, Manitoba, Osaka, Mainz, Argonne, Garching and Mattauch-Herzog instrument are discussed. The image aberrations due to the ion-beams of off median plane are found to be quite serious by the influence of the fringing field. The influence is also important if we want to correct the image defects. An example of the double focus ing mass spectrometer corrected for all six second order image defects is also shown.抄録全体を表示PDF形式でダウンロード (788K) -
小森 卓二, 田村 修三, 郡司 勝文, 織田 善次郎1973 年 21 巻 1 号 p. 27-35
発行日: 1973/03/31
公開日: 2010/06/28
ジャーナル フリーA mass spectrometer of 60°, 305mm radius, triple filament, surface ionization type was constructed the routine isotopic analysis of radioactive materials such as transuranium and fission product elements. The machine is basically a modification of the NBS-type mass spectrometer. Safety and easiness of maintenance and handling were improved by using the closed vacuum system with two ion pumps. Some results on the performance test are also described.抄録全体を表示PDF形式でダウンロード (826K) -
EDWARD M. BEAVER1973 年 21 巻 1 号 p. 37-44
発行日: 1973/03/31
公開日: 2010/06/28
ジャーナル フリーAn improved isotope ratio readout system for a six-inch ratio mass spectrometer has been developed that offers the advantages of automatic operation. precision equivalent to or somewhat better than other systems, and low cost. A pair of solid-state vibrating reed electrometers are used to measure the ion currents from two isotopes. These are interfaced to a frequency counter, operated in ratio mode, through two voltage-to-frequency converters. A digital programer is used for automatic operation.抄録全体を表示PDF形式でダウンロード (619K) -
KAZUSHIGE NISHIZAWA, KAORU NARISADA, HIDENORI TERAMATSU, MASATAKA SOYA ...1973 年 21 巻 1 号 p. 45-51
発行日: 1973/03/31
公開日: 2011/03/01
ジャーナル フリーCharge distributions of cesium ions following beta and internal conversion decays of 133Xe were investigated both theoretically and experimentally. The calculations were carried out on the assumption that reorganization of the electronic configuration occurred at each successive step in a vacancy-cascade in which Auger and radiative transitions were involved. The electron-shakeoff process following negative beta decay was also incorporated in the calculation. The calculated spectrum was compared favorably with the experimental one whichad been measured with a charge spectrometer.
It was found that the vacancy-cascade model, which consisted of radiative, Auger, and shakeoff processes, was satisfactory to account for the charge distribution of an atom followed by a nuclear decay.抄録全体を表示PDF形式でダウンロード (1288K) -
草尾 健司, 中村 信雄, 小西 文弥1973 年 21 巻 1 号 p. 53-59
発行日: 1973/03/31
公開日: 2011/03/01
ジャーナル フリーAn ion-bombardment mass spectrograph has been developed with the emphasis on high mass-resolving power of 2500, yet with simple construction. It consists of a Penning ion source for primary ion production, an electrostatic lens column(an einzel lens and a quadrupole lens)for beam focusing of the primary ion, and a CEC 21-110 B double-focusing mass spectrograph without the spark ion source for analyzer. The specimen was bombarded with the Ar+ beam of 8 keV energy, 300μ beam diameter and 1 mA/cm2 current density.
A comparison of the spectra produced by the rf spark and the ion bombardment, and the influence of atmosphere in the specimen chamber on the secondary ion intensity have been studied. The ion bombardment produces various polymeric and compound ions while the rf spark produces few of these ions. The rf spark produces many more multiply charged ions than the ion bombardment It is found that the secondary ion intensites of metals increase when bombarding in oxygen pressure of larger than 3 × 10-7 Torr(ultimate pressure), and that the increasing tendency varying with different metals. The secondary ion intensities of impurity elements in a metal show the same increasing tendency with the matrix element. Especially, in case of the iron sample, the secondary ion intensities of impurity elements can be maintained at high sensitivity and stability, and the relative sensitivities approach to the sensitivity of the matrix element by bombarding in oxygen pressure of 3-5×10-5 Torr. No influence of hydrogen or nitrogen pressure in the specimen chamber on the secondary ion intensity has been observed.抄録全体を表示PDF形式でダウンロード (1382K) -
KIMIO ISA1973 年 21 巻 1 号 p. 61-76
発行日: 1973/03/31
公開日: 2011/07/05
ジャーナル フリーMean residence time(τ)of potassium on atomically clean and gas-covered tungsten surfaces has been studied. Beam pulses shorter than those of previously reported measurements were used to improve the time resolution. Taking into consideration the shape of the gate function, which has seldom been considered, the following formulas were obtained:
G(p)/F(p)=k+1/Kτ+ p+(1+1/β')=θp+1/β G(p)=a∫∞0ep1g(1)dt. F(p)=∫∞0ep1f(t)dt.
where p is a parameter of the Laplace transfbrmation, g(t)and f(t)are the gate function and the intensity function of potassium ions, respectively. The quantity a can be determined from the experiment. K is an equilibrium constantbetween the transient adatoms and adions
M(s)↔M+(s)+c
. where s represents the surface. The quantity β, the ionization coefficient, is considered to be constant under the same surface condition and temperature. In order to make a comparison with the published values, the relationτ=βθ was introduced. From the Arrhenius type expressions of the from τ=τ0 exp(l/kT)andτ0+ exp(l+/kT), ignoring the temperature change of β, the desorption energies(l+) were found to be 2.51 eV for the clean tungsten surface and 1.63 eV for the strongly gas covered tungsten surface. Considering β, the desorption energies(l)were fbund to be 2.30 eV for the clean tungsten surface and 1.85 eV for the strongly gas-covered tungsten surface. The corresponding pre-exponential factors(τ0)were estimated to be 3.24×10-14 sec and 2.2×10-12 sec, respectively.抄録全体を表示PDF形式でダウンロード (1270K) -
ATSUHIRO SAKIYAMA1973 年 21 巻 1 号 p. 77-84
発行日: 1973/03/31
公開日: 2011/03/01
ジャーナル フリーThe absolute total scattering cross sections for K-N2 and K-CO were measured by the atomic beam attenuation method with velocity-selected potassium beams. Care was taken of the mercury drag effect in pressure measurements of N2 and CO. The effective length of the scattering chamber was obtained experimentally by changing the length of the chamber. Corrections for the thermal motion of the target gas and the angular resolution were estimated with the Barkling et al.'s formula and von Busch's formula, respectively. It is confirmed that even in the atom-diatomic molecule system van der Waals forces are dominant for scattering at thermal energies, and van der Waals constants are 325×10-60 erg·cm6 for K-N2 and 328×10-60 erg·cm6 for K-CO. These values are compared with other experimental and theoretical ones and are in agreement with the theoretical results of Langhoff and Karplus within the limit of errors.抄録全体を表示PDF形式でダウンロード (816K) -
大橋 守, 木崎 忠男, 辻本 和雄, 志田 保夫, 山田 泰司1973 年 21 巻 1 号 p. 85-90
発行日: 1973/03/31
公開日: 2010/06/28
ジャーナル フリーA study of[M-C2H2O]+, [M-C2H2O-HCN]+, and[M-C2H2O-HCN-H]+ ions in the mass spectra of deuterated derivatives of acetanilide, o-, m-and p-chloroacetanilide has confirmed that elimination of ketene from the molecular ions of these compounds proceeds via a 4-membered transition state.抄録全体を表示PDF形式でダウンロード (442K) -
HIROSHI ICHIKAWA, MICHIHIKO OGATA1973 年 21 巻 1 号 p. 91-100
発行日: 1973/03/31
公開日: 2010/06/28
ジャーナル フリーElectronic structures of simple molecular ions are calculated by the unrestricted CNDO/2 and INDO methods to show that organic chemical expressions for these ions are well reproduced. The conformational dependence of the strength of the β-bond on the heteroatom with the unpaired electron is discussed.抄録全体を表示PDF形式でダウンロード (793K) -
桂皮酸β-フェニルエチルについて中山 充, 江口 鎮子, 松尾 昭彦, 林 修一1973 年 21 巻 1 号 p. 101-107
発行日: 1973/03/31
公開日: 2010/06/28
ジャーナル フリーIon kinetic energy(IKE)spectrum of β-phenylethyl cinnamate is presented(Fig. 2). The molecularion of β-phenylethyl cinnamate undergoes several decompositions, three of which are the loss of H2O, COOH and HCOOH. To study these processes, the high resolution mass spectrometry and IKE spectrum of. β-phenylethyl cinnamate were studied. Some of the fragmentation pathways of β-phenylethyl cinnamate are shown in Fig. 6.抄録全体を表示PDF形式でダウンロード (524K) -
正田 芳郎, 橋本 圭二, 井上 武久, 藤岡 美千代, 永田 誠一1973 年 21 巻 1 号 p. 109-115
発行日: 1973/03/31
公開日: 2011/03/01
ジャーナル フリーSterols in Starfishes(Asterina pectinifera)include at least ten closely related compounds. The difference in mass spectra between Δ5 and Δ7-sterols has been discussed. The results suggest that they had similar sterol components of characteristicΔ7-sterols. Δ7-eholestenol, Δ7, 22-ergostadienol, stellastenol, Δ7, 22-stigmastadienol, Δ7-stigmastenol, chole stanol, andΔ7.22-cholestadienol were separated by gas chromatography with 3% NGS-XE 60 column and identified by the combined gas chromatographymass spectrometry(GC-MS).抄録全体を表示PDF形式でダウンロード (367K)
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