Ten lines in the range 3880;:; A ::a 5666 A in the beam-foil spectrum of iron have been identified with specific hydrogenic transitions in Fe rv-vxu. The same transitions were observed from Ni and Ar beams. Deviations from the hydrogenic wavelengths are shown to be consistent with that expected from core polarization. The absence of these lines in astrophysical sources is discussed. A wavelength table is presented for identificat!lon of hydrogenic transitions to be expected in beam-foil spectra.

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