Abstract
High-resolution atomic-beam laser spectroscopy has been performed to study Stark effect of Ba atom. Stark spectra have been observed at various electric fields for Ba highly excited states. The scalar polarizability of the transition from 6s5d3D2 to 5d6p3F3 at 728.0 nm and the tensor polarizability of the 3F3 level have been determined for the first time, to be αs = -89.8 (12) kHz/(kV/cm)2 and αt = -133.7 (20) kHz/(kV/cm)2, respectively.
Highlights
Stark effect, the shift and splitting of atomic spectral lines by an external electric field, was discovered in 1913
We report high-resolution Stark spectroscopy for Ba highly excited states using the diode laser technique together with a collimated atomic beam
A highresolution atomic beam spectroscopy was performed to measure atomic Stark spectra, with a voltage applier capable of generating strong and static voltage up to 26.0 kV corresponding to a field strength of 43.4 kV/cm
Summary
The shift and splitting of atomic spectral lines by an external electric field, was discovered in 1913. The tensor and scalar polarizabilities have become interesting and heightened properties in recent years due to several applications, such as the development of next-generation optical atomic clocks, optical cooling and trapping schemes, the study of long-range interactions, and atomic transition rate determinations [1]. Theoretical calculations of electric dipole polarizabilities have achieved a remarkable development; low-lying levels of Ba have been accurately calculated with ab initio calculation [6]. The two-valence atom Si2+ calculated by configuration interaction + all-order method shows a good agreement with experimental results [7]. Calculations for highly excited states are expected. Precise experimental data on highly excited states will provide a further test of theoretical calculation
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