Abstract

The spectral of the rare earths have been photographed under controlled excitation so that either the spectra of the doubly or triply ionized elements are brought out with maximum intensity. A mild excitation is used in addition to give the first and second spectra for comparison. Some regularities are immediately apparent and vary very gradually through the rare-earth group. The general features of the spectra are discussed in this paper.

© 1961 Optical Society of America

The Spectra of the Doubly and Triply Ionized Rare Earths

G. H. Dieke and H. M. Crosswhite
Appl. Opt. 2(7) 675-686 (1963)

Spectra of Doubly and Triply Ionized Ytterbium, Yb iii and Yb iv†

B. W. Bryant
J. Opt. Soc. Am. 55(7) 771-779 (1965)

Analysis of the Spectrum of Triply Ionized Praseodymium (Pr iv)

Jack Sugar
J. Opt. Soc. Am. 55(9) 1058-1059 (1965)

Ionization Energies of the Singly Ionized Rare Earths

Jack Sugar and Joseph Reader
J. Opt. Soc. Am. 55(10) 1286-1290 (1965)

The Atomic Spectra of the Rare Earths: Their Presence in the Sun

Charlotte E. Moore
Appl. Opt. 2(7) 665-674 (1963)