Zeeman effect of weak La I lines investigated by the use of optogalvanic spectroscopy

Ł.M. Sobolewski, Laurentius Windholz, J. Kwela

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Abstract New Landé- gJ factors of 35 energy levels of La I, found from investigations of 40 spectral lines in the wavelength range 562.959÷609.537 nm, were determined. As a source of free La atoms a hollow cathode discharge lamp was used. We monitored the signal of the optogalvanic effect appearing when a laser beam is passing through the hollow cathode. Spectra were recorded in the presence of a magnetic field of about 800 G produced by a permanent magnet, for two linear polarizations of the exciting laser light. Optogalvanic spectroscopy is a very sensitive method, so we were able to observe the Zeeman effect of very weak atomic lines. In this way we have determined for the first time the Landé-gJ factors for 35 recently found levels of neutral La. The Landé gJ- factors for several other levels were reinvestigated.
Original languageEnglish
Pages (from-to)221 - 227
JournalJournal of Quantitative Spectroscopy & Radiative Transfer
Publication statusPublished - Mar 2017

Fields of Expertise

  • Sonstiges

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