Hyperfine structure and isotope shift of transitions in Yb I using UV and deep-UV cw laser light and the angular distribution of fluorescence radiation

Abstract

Using the third harmonic of a cw titanium:sapphire laser, the hyperfine structure (HFS) and isotope shift (IS) of three deep-UV transitions of neutral Yb have been measured for the first time. By exploiting the angular distribution of fluorescence radiation, accurate and complete results are obtained for the HFS and IS of the 398.8 nm transition of Yb. From the measured data, normal and specific mass shift as well as field shift values for all transitions considered have been derived.

Doppler-free Yb spectroscopy with the fluorescence spot technique

“…Knowledge of the 1 S 0 ↔ 1 P 1 transition line in atomic Yb and of the corresponding frequency shifts for the stable isotopes is very important in these experiments as it allows for laser cooling and isotope selective photoionisation [20,22,[25][26][27]. Various methods have been used to investigate these transitions and the corresponding isotope shifts [28][29][30][31][32].…”

Comment on “Laser cooling of Yb173 for isotope separation and precision hyperfine spectroscopy”

“…The laser spectroscopy measurement of Ref. [23] used a different approach. They measured fluorescence from an atomic beam of Yb atoms with the laser polarized at θ L = 0 and θ L = 90 • .…”

“…From the hyperfine constants in Ref. [23], we calculate a hyperfine splitting between the Yb-173 F = 7/2 and 3/2 levels to be 75.3±4.0 MHz. This θ L = 0 measurement needs to be corrected for the quantum interference effect.…”

Laser spectroscopy and cooling of Yb+ions on a deep-UV transition

“…These data are very precise and allow us to calculate the field shift [21]. For the King plot and the determination of the [20].…”