Fine and hyperfine structures of singly ionized praseodymium: I. energy levels, hyperfine structures and Zeeman effect, classified lines

Abstract

An extension of the classification of the spectrum of singly ionized praseodymium, based on the analysis of high resolution data in the range 2783-27 920 cm−1, yields new energy levels in the odd configuration 4f25d6p and in the mixed even configurations 4f25d2 + 4f25d6s + 4f36p. A number of experimental characteristics of the levels have been determined or revised; energy, J, and hyperfine structure splitting are given for all known levels (105 odd levels and 187 even levels), and g values are given for 236 levels. Experimental data are presented for 172 classified intense lines in the ultraviolet range, and for 39 unclassified lines. The wavenumber distribution of the different types of observed transitions is studied.