New energy levels of La I found by laser spectroscopy

M. Faisal, I. Siddiqui, L. Windholz*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Laser spectroscopy and optogalvanic detection was applied to investigate up to now unclassified or even unknown spectral lines of atomic lanthanum (La I). The exciting laser light had wavelengths between 4300 and 6800 Å. We report the discovery of seven new energy levels. One additional level turned out to be already known, but with wrong angular momentum. Altogether 53 spectral lines could be classified as transitions of these eight levels.
Original languageEnglish
Article number107452
Number of pages5
JournalJournal of Quantitative Spectroscopy & Radiative Transfer
Publication statusPublished - Feb 2021


  • Energy levels
  • Hyperfine structure
  • Lanthanum
  • Laser spectroscopy

ASJC Scopus subject areas

  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy

Fields of Expertise

  • Sonstiges

Cite this