After a review of the present state of classification in atomic spectra of lanthanides, the regular evolution of various atomic features along the sequence is traced and supplemented by new examples in the energy differences between configurations, coupling schemes, and energy parameters. This leads to the first “generalized-least-squares” study in the lanthanides, for 4ƒ<sup>N</sup>6<i>p</i> configurations in third spectra.
© 1978 Optical Society of America
J. F. Wyart, "Analysis of lanthanide atomic spectra: Present state and trends," J. Opt. Soc. Am. 68, 197-205 (1978)