D. R. Kania, B. J. MacGowan, C. J. Keane, C. M. Brown, J. O. Ekberg, J. F. Seely, U. Feldman, and J. Reader, "Transitions and energy levels for Cu-like Yb41+, Ta44+, and U63+," J. Opt. Soc. Am. B 7, 1993-1996 (1990)
Transitions from the n = 4, 5, and 6 excited levels of the Cu-like ions Yb41+, Ta44+, and U63+ were observed in the spectra from plasmas that were produced by one or two beams of the Nova laser. Wavelengths in the range 9–140 Å were measured with an uncertainty of ±0.015 Å and were compared with previously measured and predicted wavelengths. The energy levels were derived from the observed wavelengths.
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B, Blended transition.
Intensity based on visual estimate of photographic darkening.
Wavelengths in this study.
Previously observed wavelengths of Refs. 1, 2, 5, and 6.
Semiempirically corrected wavelengths from Seely et al.,2 except for the n = 4–6 and n = 5–6 transitions, which are ab initio calculations made using Grant’s program.3,4
Wavelength based on the observed energies of Table 2.
Table 2
Energy Levels (in 103 cm−1) for Yb41+, Ta44+, and U63+
Energies derived from the observed wavelengths of Table 1.
Energies based on the semiempirically corrected wavelengths of Seely et al.2 The n = 6 energy levels were obtained by adding the energy calculated by using Grant’s program to the semiempirically corrected energies of the lower levels.
Tables (2)
Table 1
Wavelengths (in Å) and Classification of Transitions in Yb41+, Ta44+, and U63+a
B, Blended transition.
Intensity based on visual estimate of photographic darkening.
Wavelengths in this study.
Previously observed wavelengths of Refs. 1, 2, 5, and 6.
Semiempirically corrected wavelengths from Seely et al.,2 except for the n = 4–6 and n = 5–6 transitions, which are ab initio calculations made using Grant’s program.3,4
Wavelength based on the observed energies of Table 2.
Table 2
Energy Levels (in 103 cm−1) for Yb41+, Ta44+, and U63+
Energies derived from the observed wavelengths of Table 1.
Energies based on the semiempirically corrected wavelengths of Seely et al.2 The n = 6 energy levels were obtained by adding the energy calculated by using Grant’s program to the semiempirically corrected energies of the lower levels.