Abstract
Isotope shift Δσ(156Gd−160Gd) is reported in 70 spectral lines of neutral gadolinium atom (Gd I) in the 3290- 3920 Å region providing isotope shift data in UV lines of Gd I spectrum for the first time. The measurements were carried out on a photoelectric recording Fabry-Perot Spectrometer using highly enriched isotopic samples of gadolinium. Term isotope shifts ΔT(156Gd−160Gd) have been evaluated for 48 high lying even parity energy levels of Gd I using this data; new ΔT values have been obtained for 24 levels. Electronic configurations 4f75d6s6p, 4ff75df26p and 4f85d6s assigned earlier to these even levels have been either confirmed or configuration mixing pointed out in some of these levels. Probable assignment of 4f85d6s configuration to 8 even levels between 32 930 and 35 500 cm-1 have been confirmed.
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Afzal, S.M., Venugopalan, A. & Ahmad, S.A. Isotope shift studies in the spectra of Gadolinium in UV region and term shifts of high even levels of Gd I. Z Phys D - Atoms, Molecules and Clusters 41, 95–100 (1997). https://doi.org/10.1007/s004600050295
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DOI: https://doi.org/10.1007/s004600050295