Abstract
The behavior of excitation cross sections of the strontium atom was studied experimentally in the spectral series 5s4d1D2-5snf1F 3 o in the range n = 4–26, and also the optical excitation functions for lines in the same series in the range n = 4–12. It was established that the beginning of the series is perturbed. The effect of the perturbation is manifested both in the irregular course of the dependence of the absolute values of the cross sections on n, and in the difference between the shapes of the optical excitation functions for different terms of the series. The results obtained are compared with available experimental data.
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