Single and Double Ionization of Na, K and Mg by Electron Impact
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概要
- 論文の詳細を見る
The ionization efficiency curves for Na^+, Na^<++>, K^+, K^<++> Mg^+ and Mg^<++> are studied with essentially monoenergetic electrons. It is proved that Na^+, K^+ and Mg^+ follow the linear law up to 1.5 eV, 0.8 eV and 2 eV above the thresholds, respectively, and that Na^<++> and K^<++> follow the square law up to about 20 eV and 15eV above the thresholds, respectively. These results agree with the iheoretical prediction that n-fold multiple ionization would be proportional to a n-th power of excess electron energy. Two remarkable humps are found in the I. E. curve for Mg F which are attributed to autoionization processes, These processes occur at 2.31:0.1eV and 5.0±0.2eV above the ionizotion potential, the first one may correspond to the excited states of Mg atom, ^1F^o and ^3D^o, but any excited states to be correlated to the second one is not known. Contrary to expectation, the I. E. curve for Mg^<++> is not a square curve of excess energy but has a complex shape. In order to explain the shape, possibility of autoionization due to excitation of inner shell electron is suggested.
- 社団法人日本物理学会の論文
- 1961-11-05
著者
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Kaneko Yozaburo
Department Of Physics Faculty Of Science Tokyo Metoropoliton University
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KANEKO Y.
Department of Earth & Planetary Sciences, Tokyo Institute of Technology
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