Hyperfine Structure and Electric Dipole Moment of BaF X²Σ+

Wolfgang Ernst, Jörn Kändler, T. Törring

Research output: Contribution to journalArticlepeer-review


Molecular‐beam laser‐microwave double‐resonance spectroscopy was applied to study rotational transitions in the X 2Σ+, v=0 state of BaF at high resolution. From the analysis of the fluorine hyperfine structure (hfs) the magnetic hfs parameters were determined as b=63.509 (32) MHz and c=8.224 (58) MHz (statistical standard deviation in parentheses). Additional Stark effect measurements yielded and electric dipole moment μ=3.170(3) D. The magnetic hfs is interpreted as an effect of fluorine electron spin polarization. Mixing coefficients for Ba+ hybridization are estimated and compared with the charge distribution derived from the measured dipole moment in terms of an ionic bonding model.
Original languageEnglish
Pages (from-to)4769-4773
JournalThe Journal of Chemical Physics
Issue number9
Publication statusPublished - 1986
Externally publishedYes


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