Line identification of atomic and ionic spectra of Holmium in the near infrared spectral range from 700 nm to 1750 nm

• Published in: Spectrochimica acta. Part B: Atomic spectroscopy 2024-07, Vol.217, p.106950, Article 106950
• Main Authors: Zengin, Muammer, Barka, Seda Kın, Öztürk, İpek K., Klincare, Ilze, Kröger, Sophie, Başar, Gönül
• Format: Article
• Language: English
• Subjects: Atomic data; Fourier spectra; Line classification; Line: identification fine structure
• ISSN: 0584-8547; 1873-3565
• DOI: 10.1016/j.sab.2024.106950

The aim of the study is to extend the list of spectral lines of atomic and single ionized holmium (Ho) into the near infrared wavelength range up to 1750 nm. Spectra of a Ho hollow cathode discharge lamp with neon or argon as buffer gases have been measured with a Fourier Transform spectrometer in different spectral ranges. In total, the range from 700 nm to 1750 nm i.e. from 5710cm−1 to 14280cm−1 has been covered. A total of almost 800 spectral lines were detected. Based on the known energy levels of atom and ion Ho, 589 lines could be classified as Ho I transitions and 31 lines as Ho II transitions. The remaining 171 lines could mostly be classified as different Ho I or Ho II, based on different signal-to-noise ratios in spectra measured with different buffer gases. In the wavelength range from 1200 nm to 1750 nm, a list of Ho lines is presented for the first time. In the wavelength range from 700 nm to 1200 nm 216 lines had not been listed in literature up to now. [Display omitted] •FT spectra of Holmium in the near infrared (700 nm to 1750 nm).•791 spectral lines identified by comparing spectra with different discharge conditions.•515 spectral lines published for the first time.•Simulation of hyperfine structure ⇒ 620 spectral lines classified, 203 for the first time.