Discovery of new even-parity fine structure levels of Pr I with angular momenta 1/2, 3/2, and 5/2

Imran Siddiqui*, Khan Shamim, Syed Tanweer Iqbal, L. Windholz

*Korrespondierende/r Autor/-in für diese Arbeit

Publikation: Beitrag in einer FachzeitschriftArtikelBegutachtung


The spectrum of Praseodymium was investigated in the visible region from 4000 Å to 7500 Å based on previously recorded Fourier Transform spectra. Source of free Pr atoms was a hollow cathode discharge lamp. The investigation of spectral lines was performed using laser-induced fluorescence spectroscopy. A tunable single mode ring-dye laser, pumped by a frequency doubled Nd-YAG laser, was used as the light source to investigate selected lines. Hyperfine spectra of 129 lines were recorded and the magnetic dipole hyperfine structure constants of the involved energy levels were determined. This led to the discovery of up to now unknown levels. In this paper, 30 even parity levels, having J-values of 1/2, 3/2, and 5/2 are presented. The existence of all levels is confirmed by several laser excitations in the spectral range of our dye laser.
FachzeitschriftJournal of Quantitative Spectroscopy & Radiative Transfer
PublikationsstatusVeröffentlicht - Juni 2021


  • Praseodymium
  • New energy levels
  • Hollow cathode lamp
  • Laser-induced fluorescence
  • Hyperfine structure

ASJC Scopus subject areas

  • Strahlung
  • Atom- und Molekularphysik sowie Optik
  • Spektroskopie

Fields of Expertise

  • Sonstiges


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