1. Spontaneous Ionization in Slow Collisions
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3. Molecular-beam studies of Penning ionization
4. 4) M. Ukai and Y. Hatano, “Gaseous Electronics and Its Applications,” ed. by R. W. Crompton, M. Hayashi, D. E. Boyd, and T. Makabe, KTK Scientific, Tokyo (1991), p. 51.
5. 5) M. Ukai and Y. Hatano, “Charged Particles and Photon Interactions with Matter—Chemical, Physico Chemical, and Biological Consequences with Applications,” ed. by A. Mozumder and Y. Hatano, Marcel Dekker, New York (2004), p. 121.