Abstract

The spectrum of Pr³⁺ produced by a sliding spark discharge was photographed in the wavelength range of 800 to 3100 Å with a 35-ft Eagle vacuum spectrograph. An analysis of the resulting line list led to the discovery of all the levels of the 4f² (except the ¹S₀), 4f5d, 4f6s, and 4f6p configurations. The interaction parameters for each configuration were derived from a least-squares fit of the energy formulas to the observed levels.

© 1965 Optical Society of America

Analysis of the Spectrum of Triply Ionized Manganese (Mn IV)*

Stanley J. Yarosewick and Frank L. Moore
J. Opt. Soc. Am. 57(11) 1381-1387 (1967)

Analysis of the Spectrum of Triply Ionized Magnesium (Mg iv)

Marie-Christine Artru and Victor Kaufman
J. Opt. Soc. Am. 62(8) 949-957 (1972)

Spectrum and energy levels of triply ionized yttrium (Y iv)

Gabriel L. Epstein and Joseph Reader
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Spectra of Doubly and Triply Ionized Ytterbium, Yb iii and Yb iv†

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

Preliminary Analysis of the Spectrum of Triply Ionized Gadolinium (Gd iv)*

J. F. Kielkopf and H. M. Crosswhite
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