Eur. Phys. J. D 17, 275-284 (2001)
https://doi.org/10.1007/s100530170001

Hyperfine-structure measurements and new levels evaluation in singly ionized praseodymium

Chair of Atomic Physics, Faculty of Technical Physics, Poznań University of Technology, Piotrowo 3, 60-965 Poznań, Poland

Corresponding author: ^a jarekr@rose.man.poznan.pl

Received: 28 February 2001
Revised: 3 July 2001
Published online: 15 December 2001

Abstract

Results of systematic studies of the hyperfine structure of singly ionized praseodymium are presented. For many of the known energy levels the hyperfine constants A and B have been measured more precisely and found consistent with previous literature data. Identification of some new energy levels has also been performed. The hyperfine structure of some unclassified lines has been recorded by the method of laser induced fluorescence in a hollow cathode discharge. J quantum numbers and A-values for upper and lower levels have been determined. Identification has been achieved through comparison of the obtained results with those for known levels. Three new low-lying levels in singly ionized praseodymium have been discovered. Some of the recorded unclassified lines involve two new levels and their identification requires further investigations.