高電界によるイオンや電子の動的挙動は X 線回折法で直接観測できるはずであるが,これまで実現していない.このため,外場による X 線回折強度の微小変化を同期検出する変調 X 線回折法を開発むし, GaAs のイオンや結合電子の微小変位 (10-4～10-5Å) を灘定することにより,有効電荷等結合状態を明らかにすることができた. また, X 線反射強度の微小変化の測定から,ショットキー接合の空乏層の高電界が直接検出できることを Al_GaAs について示し,その周波数依存性等から,この方法が固体素子の動的評価に適用できることを明らかにした.
Propagation of electromagnetic waves in muddy space of scattering objects has been discussed from a homogeneous scattered ray model since its first analysis by G. Mie in 1908. J. W. Ryde applied this problem to the evaluation of attenuation of microwave in precipita-tion, the attenuation being calculated only by the sum of the total cross-sections. In this study, however, the attenuation is discussed from a random scattered ray model, and the phase variation of the multi-rays causes additional attenuation by interference with the receiving field strength. This study presents a new mothod of calculation suitable to evaluate attenuation due to precipitation which is composed of three terms combined with scatter and stochastic multi-interference effects. The utility of the new method of calculation was evaluated by making a comparison between the calculated attenuation and the results of some experiments in rainy and snowy weathers.
The purpose of this work is to make an attempt to clarify the so-called end correction of a capillary viscometer on the foundation of the theory reported in a previous paper, and to formulate the relation between the measured quantities and viscosity. Some experiments were carried out by using two capillary tubes, short and long, with equal diameters. It is observed that the experimental results agree fairly well with the theoretical con-siderations.