Electric dipole moments and hyperfine structure of SrF A 2Π and B 2Σ

Abstract The Stark effect of individual rotational lines of the A 2 Π-X 2 Σ + and B 2 Σ + -X 2 Σ + systems of 88 SrF was measured by applying high-resolution laser spectroscopy to a molecular beam. The excited-state dipole moments could be determined as μ (A 2 Π) = 2.064 (50) D and μ (B 2 Σ + ) = 0.91 (4) D, the absolute error of the measurements given in parentheses. While the hyperfine structure splittings of rotational levels in the A 2 Π state were less than 3 MHz, in the B 2 Σ + state the magnetic hfs parameter b could be obtained from the zero-field B-X spectra as b (B 2 Σ + ) = 14.0 (4.6) MHz.