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Title: Atomic energy levels - the rare earth elements. (the spectra of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium). [66 atoms and ions]

Technical Report ·
OSTI ID:6507735

Energy level data are given for 66 atoms and atomic ions of the 15 elements lanthanum (Z=57) through lutetium (Z=71). These data have been critically compiled from published and unpublished material. Only experimentally determined energy levels are included, the energies being restricted to excitations of outer-shell electrons and to inner-shell excitations up to the soft x-ray range. The levels were taken from analyses of the spectra of atomic gases wherever possible; however, the levels for several of the triply ionized rare earths are from analyses of the spectra of the ions in crystals or solutions. In addition to the level value (usually in units of reciprocal cm) and the parity, the J value, configuration and term assignments, and the experimental g value are listed wherever available. Leading percentages from the calculated eigenvector are also tabulated for each level if available. The levels are grouped into spectroscopic terms of appropriate coupling schemes where such groups appear meaningful. Ionization potentials are tabulated for most of the spectra. Complete references for the tabulated data are given for each spectrum. Copyright (c) 1978 by the Secretary of Commerce on Behalf of the United States Government.

Research Organization:
Manchester Coll. of Science and Technology (UK). Dept. of Chemistry
OSTI ID:
6507735
Report Number(s):
PB-282067; NSRDS-NBS-60; TRN: 79-005913
Country of Publication:
United States
Language:
English