Abstract

A measurement of the hyperfine coefficients and isotope shifts for the atomic dysprosium $421.291\mathrm{nm}$ transition $(4f^{10}6s^2,J=8\to 4f^{10}6s6p,J=9)$ using atomic beam laser-induced fluorescence spectroscopy is presented. A King plot analysis is performed to determine a specific mass shift of $\delta {\nu }_{\mathrm{sms}}^{164–162}=11\left(7\right)\mathrm{MHz}$ for the $421\mathrm{nm}$ transition, confirming the pure $4f^{10}6s6p$ configuration of the excited state. This transition is currently being explored for laser cooling of an atomic beam of dysprosium used in a search for a temporal variation of the fine-structure constant.

© 2009 Optical Society of America

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