Dataset referencing 1982NE12
J.Phys.(London) B15, L425 (1982)
J.Neukammer, H.Rinneberg
Hyperfine Structure of Perturbed 6sns 3S1 Rydberg States of Barium
NUCLEAR MOMENTS 135,137Ba; measured hfs. Tunable cw dye lasers.
doi: 10.1088/0022-3700/15/13/002