An “ordinary” atom consists of a positively charged nucleus which interacts electromagnetically with electrons, leading to bound atomic states. Similar systems, in which an electron is replaced by any negatively charged particle other than an electron, are called “exotic” atoms. In 1947, soon after the discovery of the π meson, Wheeler(1) suggested the existence of such atoms. The first species to be observed were muonic atoms at Columbia(2) and π-mesonic (pionic) atoms at Rochester and Pittsburgh(3) in 1952–1953. Κ-mesonic (kaonic) atoms were first observed in 1965 at Argonne, (4) and 2, hyperonic(5) and antiprotonic atoms(6) were seen and investigated for the first time at CERN in 1970.
KeywordsVacuum Polarization Nuclear Polarization Lamb Shift Finite Size Effect Muonic Atom
Unable to display preview. Download preview PDF.
- 15.G. Backenstoss, T. Bunaciu, J. Egger, H. Koch, A. Schwitter, and L. Tauscher, Z. Phys. B 273, 137 (1975).Google Scholar
- 17.G. Backenstoss, Atomic Physics, Vol. 4, p. 163, Ed. G. zu Putlitz, Plenum Press, New York (1974).Google Scholar
- 22.R. Rafelski, B. Müller, G. Soff, and W. Greiner, Ann. Phys. (N. Y.) 88, 419 (1974); P. J. S. Watson and M. K. Sundaresan, Can. J. Phys. 52, 2037 (1974); V. W. Hughes, in Proceedings of the Sixth International Conference on High Energy Physics and Nuclear Structure, Santa Fe, 1975, p. 515, AIP, New York (1975).ADSCrossRefGoogle Scholar
- 25.L. Tauscher, in Proceedings of the 6th International Conference on High Energy Physics and Nuclear Structure, Santa Fe, 1975, p. 451, AIP, New York (1975).Google Scholar
- 27.H. Koch, in Proceedings of the Fifth International Conference on High Energy Physics and Nuclear Structure, Uppsala, 1973, p. 255, Almquist and Wiksell, Stockholm (1974).Google Scholar