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The Springer Series on Atomic, Optical, and Plasma Physics covers in a comprehensive manner theory and experiment in the entire field of atoms and molecules and their interaction with electromagnetic radiation. Books in the series provide a rich source of new ideas and techniques with wide applications in fields such as chemistry, materials science, astrophysics, surface science, plasma technology, advanced optics, aeronomy, and engineering. Laser physics is a particular connecting theme that has provided much of the continuing impetus for new developments in the field, such as quantum computation and Bose-Einstein condensation. The purpose of the series is to cover the gap between standard undergraduate textbooks and the research literature with emphasis on the

For pt.V see ibid., vol.24, no.8, p.L213-8 (1991). The complete density matrix describing the charge transfer process H++Na(3s or 3p) to H(n=2)+Na+ has been measured for scattering angles theta (0.2' and an H+ energy of 1 keV. At this energy the collision velocity is about half the mean velocity of the Na(3p) valence electron. Pronounced right-left scattering asymmetries has been observed both for initially oriented as well as for aligned Na(3p) states. Very good agreement is found with recent elaborate theoretical results of Dubois et al. (1993). Measurements at 0.75 keV and 2 keV show similar trends. The findings are discussed in terms of simple models such as velocity matching and propensity rules for orientation.