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Volume 19, Issue 7
Displaying 1-4 of 4 articles from this issue
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Masanobu SUZUKI, Torao SEKI1976 Volume 19 Issue 7 Pages 221-228
Published: July 20, 1976
Released on J-STAGE: September 29, 2009
JOURNAL FREE ACCESSSingle crystal films of Pb1-xSnxSe (0≤x≤0.1) were prepared on the cleaved KCl substrates by vacuum evaporation. The evaluation procedure of the optical properties, based on the measurement from 2.5 to 25 μm at room temperature, was presented in detail. The content of Sn, x, was determined by the empirical formula of Strauss.
Optical absorption at the band edge was found to obey the Urbach rule and attributed to the allowed direct transitions. The dispersion of the refractive index provided a peak closely related to the optical energy gap and it was shifted to a longer wavelength with x. This relationship with respect to x was also confirmed by the increase in the dielectric constant (ε∞) and the shift of the resonance wavelength (λ0) in the single oscillator model.View full abstractDownload PDF (1361K) -
Hiroshi MIMA, Yasuo FUJII, Kunio YAGI, Futoshi KANEMATSU1976 Volume 19 Issue 7 Pages 229-236
Published: July 20, 1976
Released on J-STAGE: September 29, 2009
JOURNAL FREE ACCESSA new method is proposed for improvement on soft x-ray limit of a Bayard-Alpert type hot cathode ionization gauge. In a gauge with an open end grid and an x-ray shielding plate having a hole for ion extraction, it is found that the ion collector electrode placed at a suitable distance beneath the hole can be effectively protected from the illumination of x-ray flux directly from the grid surface. A hemispherical ion reflector and a pair of flat plates placed each other with a slight gradient are also examined about their behavior as an x-ray reflector. The gauges of different types are proposed. A modified extractor gauge with the open end grid and hemispherical x-ray reflector, which consists of a part of glass envelope of the test tube, was examined experimentally and the sensitivity of 7-8 Torr -1 was obtained.View full abstractDownload PDF (1098K) -
Kenya AKAISHI1976 Volume 19 Issue 7 Pages 237-242
Published: July 20, 1976
Released on J-STAGE: September 29, 2009
JOURNAL FREE ACCESSNoble gas ion scattering is applied to surface analysis of a stainless steel (SS) sample. The scattering experiments have been carried out in UHV system with a sputter ion pump and a Ti sublimation pump. In the scattering spectra, two predominant signals are observed. These are due to scattered ion current from oxygen atom on the SS surface and the composition atoms (such as Cr, Fe, Ni) of SS. The sorption dependency by oxygen atom and the primary ion energy dependency of the relative signal ratio are discussed by comparing with the experimental results (He+ → O/Ni) reported by E. Taglauer and W. Heiland [1]. Shadowing effect is observed for oxygen over 0.7 Langmuir. It is concluded that, from the obtained energy spectra for the SS sample under various cleaning conditions, surface concentration of oxygen atom distributes from 0.1 to several Langmuir.View full abstractDownload PDF (753K) -
Toru INOUE, Takeo OKAYAMA1976 Volume 19 Issue 7 Pages 243-244
Published: July 20, 1976
Released on J-STAGE: September 29, 2009
JOURNAL FREE ACCESSDownload PDF (303K)
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