2026/05/28 by Felix Waldherr, Lukas Möller, Simon Stellmer
Physics and Astronomy · #physics.atom-ph
We report laser-induced-fluorescence spectroscopy of the 1S0 → 3P1 intercombination transition in neutral zinc at 307.6~nm. Isotope shifts are measured for all stable isotopes with kHz-level precision, improving previous data by about two orders of magnitude. For 67Zn, we resolve the excited-state hyperfine structure and determine δν67,64\rm COG=1085.933(7)~MHz, A=608.922(3)~MHz, and B=-18.995(10)~MHz. A King plot comparison with the 1S0 → 1P1 214-nm transition results in field- and mass-shift parameters of F307.6,214=1.17(5) and K307.6,214=-153(60)~GHz u. These results provide the spectroscopic basis for narrow-line cooling and precision measurements based on zinc, including the development of an optical clock.