New High Resolution Infrared Fourier Transform Spectrometer And The First Results In Atomic, Molecular And Crystal Spectroscopy

Fine Isotopic Structure on Hyperfine Structure in the Monoisotopic Dopant-Ion Spectra in Crystals*

“…For observation of such small effects, instrumentation needs to be Fabry-Perot type, or high resolution Fourier-spectrometer (resolution $0.005 cm À1 ). [9] Studying the HFS in Ho doped ILF, [10,11] after additional inspection of spectra with new instrumentation and cooling to 2 K, we confirmed previous observation of shoulders on HFS components. Mostly these effects are observed in conditions similar to those ones, which are necessary for hyperfine structure (HFS) observation.…”

“…The first one was a high resolution FT-spectrometer UFS-02, designed by [11,15,16] The scientific program of the department was oriented and concentrated on the high-resolution broad-band infrared spectroscopy of solids at low temperature. The first one was a high resolution FT-spectrometer UFS-02, designed by [11,15,16] The scientific program of the department was oriented and concentrated on the high-resolution broad-band infrared spectroscopy of solids at low temperature.…”

“…For the isolated atoms (in hollow cathode) this effect was intensively studied by atomic spectroscopy means, except the infrared range, where the pioneer work was performed by Connes et al [18] on a high-resolution home made FT-IR spectrometer with one billion points in interferogram (down and middle spectra in Fig. 1 We reported the first observation of hyperfine structure in the optical spectra of LiYF 4 : Ho 3þ [10][11][12][13] and studied this HFS in detail. This effect remains and in the solid state, but its manifestation changes very much due to Stark splitting of electron levels in the crystal field.…”