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Abstract:
We report absolute frequency, isotope shift, radiative lifetime, and hyperfine structure measurements of the ((4s2)1S0→(4s4p)1P1 (213.8 nm) transition in Zn I using a cryogenic buffer gas beam. Laser-induced fluorescence is collected with two orthogonally oriented detectors to take advantage of differences in the emission pattern of the isotopes. This enables a clear distinction between isotopes whose resonances are otherwise unresolved, and a measurement of the 67Zn hyperfine structure parameters, A(67Zn)=20(2)MHz and B(67Zn)=10(5)MHz. We reference our frequency measurements to an ultralow expansion cavity and achieve an uncertainty at the level of 1 MHz, about 1 percent of the natural linewidth of the transition.
