Physics: F. Zwicky Ionization in Gases by Ions and Atoms
نویسندگان
چکیده
It has been assumed for a long time that the ionization of atoms by ions must in one form or another play an important r6le in the phenomena of gas discharges. This assumption found its mathematical expression in the well-known theory of Townsend. Only recently, however, have the elementary effects of the ionization by ions been experimentally investigated. The ionization of noble gas atoms by alkali ions was studied in particular and a number of important results have been arrived at by R. M. Sutton,' R. M. Sutton and J. C. Mouzon2 and 0. Beeck.3 The points which are essential for our considerations may be stated roughly as follows. Denote the masses of the impinging ion and the target gas atom by m and M, respectively. With the auxiliary condition that the energy of the impinging ion be kept constant
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