Radiative lifetimes of 27 levels (27 041.751–38 434.97 cm−1) in Gd I and 27 levels (27 130.397–45 394.925 cm−1) in Gd II have been measured using the time-resolved laser-induced fluorescence method. Laser ablation was used to generate Gd atoms and ions on a Gd plate. The measured lifetime values range from 4.0 to 90 ns with an uncertainty of 5% or less. Of all the results, to our knowledge, lifetimes of 23 Gd II levels and 11 Gd I levels are reported for the first time. Good agreement between our results and the previous ones has been achieved.
Radiative lifetimes of 79 levels belonging to the 3d 3 4s4p, 3d 4 4p, 3d 3 4s5p, 3d 4 5p, and 3d 3 4s4d configurations of V i with energy from 26,604.807 to 46,862.786 cm −1 have been measured using time-resolved laser-induced fluorescence (TR-LIF) spectroscopy in laser-produced plasma. The lifetime values reported in this paper are in the range of 3.3-494 ns, and the uncertainties of these measurements are within ±10%. A good agreement was obtained with previous data. HFR+CPOL calculations have been performed and used to combine the calculated branching fractions with the available experimental lifetimes to determine semi-empirical transition probabilities for 784 V i transitions.
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