Electron stopping power in aluminum in the energy region from 2 to 10.9 keV

By transmission technique of electrons the stopping power in aluminum has been measured in the energy region from 2 to 10.9 keV. The discussions are given for the characteristics of specimen films; the effect of the thickness non-uniformity, and those of the contamination with adsorbents and the oxidation of a specimen film surface. Through these discussions fairly accurate values of electron stopping power were obtained; they showed the E-1 dependence and smaller than given from the theory by Bethe or the semi-empirical values by Sugiyama in higher energy region, and in the region lower than 5 keV showed comparatively good agreement with the theory within the limit of the experimental error. (auth.)