Table 4 Hyperfine structure constants of 167Er. Ref. 28.

From: Laser isotope enrichment of 168Er

Level

HFS Constants of 167Er (MHz)

A

B

4f126s2 3H6 (0.0 cm-1)

-120.487

-4552.984

4f115d6s2 J = 7 (15,846.549 cm-1)

-140.4

-2505

4f115d26s J = 8 (32,884.86 cm-1)

-159.3

-1915

J = 9 (50,552.6 cm-1)

-111

-2263

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