The Fifth Spectrum of Praseodymium.
- 1 November 1967
- journal article
- Published by National Institute of Standards and Technology (NIST) in Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry
- Vol. 71 (6) , 583-585
- https://doi.org/10.6028/jres.071A.049
Abstract
Twelve spectral lines of quadruply-ionized praseodymium in the region 840 to 2250 Å are reported. Five terms (4f2F, 5d2D, 6s 2S, 6p2P, and Is2S) and the hyperfine splitting of the 6s 2S term are given. A calculation of the principal ionization energy (Pr4+ → Pr5+) leads to a value of 57.44 eV with an estimated uncertainty of ±0.05 eV.Keywords
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