Donald C. Griffin, John S. Ross, and Robert D. Cowan, "Configurations 4f106s6p and 4f95d6s2 in Neutral Dysprosium†," J. Opt. Soc. Am. 62, 571-579 (1972)
A partial analysis of the configurations 4f106s6p and 4f95d6s2 in neutral dysprosium has been based on least-squares calculations of energy-level structures, combined with experimental data for observed energy levels, g values, and isotope shifts. Thirty-one levels for each configuration have now been interpreted; of these, 24 levels are new designations in 4f106s6p and 18 are new designations in 4f95d6s2. We were able to fit the levels of 4f106s6p to within a standard deviation equal to 0.6% of the experimental energy-level spread, and the levels of 4f95d6s2 to within 0.9%. The agreement between experimental and calculated g values is good and the configuration assignments are consistent with isotope-shift data.
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s/w(stand. dev./width of experimental levels) = 0.58%
Calculation includes 4f10(5I, 3K12, 3H1234). All calculated levels attributed to 4f10(5I8, 5I7, 5I6, 5I5)6s6p are listed.
Isotope shifts Δν(164–160) relative to the 5I term of 4f106s2 in mK, from Ref. 2 and subsequent measurements.
Only coefficients greater than 0.2 are listed.
Previously designated by Murakawa (Ref. 4).
Because of Murakawa’s change of J for this level from 9 to 7, the experimental g value may need to be reduced as much as 0.04.
F2, F4, F6 for the 4f10 subshell were held fixed at the values determined by Conway and Worden (Ref. 1) for 4f10 6s2. This appears reasonable because HF calculations yield the same values of these parameters for both the 4f10 6s2 and 4f10 6s6p configurations. α, β, and γ were taken from Ref. 15 for Ho iv.
Table III
Experimental and calculateda, energy levels (cm−1) for 4f95d6s2 of Dy i.
s/w(stand. dev./width of experimental levels) = 0.92%
Calculation includes 4f9(6H, 6F, 4I3, 4F1234, 4K12, 4G1234). All calculated levels of 4f95d6s2 for J = 6, 7, 8, 9, 10 up to 32 000 cm−1 are listed. In order to keep the size of the table to a reasonable length, the only J = 4 and 5 levels that are listed are the three that have been correlated with experimental levels.
Isotope shifts Δv (164–160) relative to the 5I term of 4f106s2 in mK, from Ref. 2 and subsequent measurements.
Only coefficients greater than 0.20 are listed.
Previously designated by Conway and Worden (Ref. 1).
Previously designated by Murakawa (Ref. 4).
F2, F4, and F6 for the 4f9 core were treated as a single parameter by requiring their ratios to remain equal to the hydrogenic ratios (F4/F2 = 0.66816 and F6/F2 = 0.49438) throughout the calculation. α, β, and γ were taken from Ref. 15 for Dy iv.
Tables (4)
Table I
Experimental and calculateda energy levels (cm−1) for 4f10(5I)6s6p of Dy i.
s/w(stand. dev./width of experimental levels) = 0.58%
Calculation includes 4f10(5I, 3K12, 3H1234). All calculated levels attributed to 4f10(5I8, 5I7, 5I6, 5I5)6s6p are listed.
Isotope shifts Δν(164–160) relative to the 5I term of 4f106s2 in mK, from Ref. 2 and subsequent measurements.
Only coefficients greater than 0.2 are listed.
Previously designated by Murakawa (Ref. 4).
Because of Murakawa’s change of J for this level from 9 to 7, the experimental g value may need to be reduced as much as 0.04.
F2, F4, F6 for the 4f10 subshell were held fixed at the values determined by Conway and Worden (Ref. 1) for 4f10 6s2. This appears reasonable because HF calculations yield the same values of these parameters for both the 4f10 6s2 and 4f10 6s6p configurations. α, β, and γ were taken from Ref. 15 for Ho iv.
Table III
Experimental and calculateda, energy levels (cm−1) for 4f95d6s2 of Dy i.
s/w(stand. dev./width of experimental levels) = 0.92%
Calculation includes 4f9(6H, 6F, 4I3, 4F1234, 4K12, 4G1234). All calculated levels of 4f95d6s2 for J = 6, 7, 8, 9, 10 up to 32 000 cm−1 are listed. In order to keep the size of the table to a reasonable length, the only J = 4 and 5 levels that are listed are the three that have been correlated with experimental levels.
Isotope shifts Δv (164–160) relative to the 5I term of 4f106s2 in mK, from Ref. 2 and subsequent measurements.
Only coefficients greater than 0.20 are listed.
Previously designated by Conway and Worden (Ref. 1).
Previously designated by Murakawa (Ref. 4).
F2, F4, and F6 for the 4f9 core were treated as a single parameter by requiring their ratios to remain equal to the hydrogenic ratios (F4/F2 = 0.66816 and F6/F2 = 0.49438) throughout the calculation. α, β, and γ were taken from Ref. 15 for Dy iv.