Reference Data on Atomic Physics and Atomic Processes [electronic resource] / by Boris M. Smirnov ; edited by G. W. F. Drake, G. Ecker, H. Kleinpoppen, W. E. Baylis, Uwe Becker, Philip G. Burke, R. N. Compton, M. R. Flannery, C. J. Joachain, B. R. Judd, K. P. Kirby, P. Lambropoulos, G. Leuchs, P. Meystre