Abstract
In the same method of investigation that was applied on Zn by the senior writer, the study on Cu was commenced, and this is the first report. The characteristic feature of this method, differing from those which are generally applied by many Workers, exists in not accepting the assumption of the free electron in metals as the basis of the investigation. So, as the first step, the energy level of the valency electron in Cu was determined from the analysis of the X-ray spectral lines, to whose emissions-the valency electron probably associates. As these lines, the followings; Lβ'λ 12.989 Å, β''' 12.911 (shorter than Lβ1, LII-MIV, 13.026) and Lα'' 13.233, α'''' 13.176 (shorter than Lα12, LIII-MIVV, 13.301); were selected from those measured by Gwinner, Z. S. f. Phys., 108 (1938), 528, while the lines, Lβ'', 12.957, α' 13.277 and α''' 13.261, excluded, though they satisfy the condition for the wave-length above mentioned; and the reason for this will be described in a later paper. Accordingly, the line above selected are taken as due to the transitions, LI-EI, LII-E3 and LIII-E2, LIII-E4, respectively, and combined with Kα2, K-LII and Kα1, K-LIII, respectively, obtaining the va'u s, K-E1=661.417, 661.598, K-E3=661.841 and K-E4=661.896 Ryd. Thus the distances of the energy levels of the valency electron in Cu froni, K-level, are determined.
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