Precision frequency measurement of visible intercombination lines of strontium

Year: 2003

Authors: Ferrari G., Cancio P., Drullinger R., Giusfredi G., Poli N., Prevedelli M., Toninelli C., Tino G.M.

Autors Affiliation: Dipartimento di Fisica and LENS, Universita` di Firenze, INFM-UdR Firenze, Polo Scientifico, 50019 Sesto Fiorentino, Italy; Istituto Nazionale di Ottica Applicata, Largo Enrico Fermi 2, 50125 Firenze, Italy; Dipartimento di Chimica Fisica, Università di Bologna, Via del Risorgimento 4, 40136 Bologna, Italy

Abstract: We report the direct frequency measurement of the visible 5s(2) S-1(0)-5s5p P-3(1) intercombination line of strontium that is considered a possible candidate for a future optical-frequency standard. The frequency of a cavity-stabilized laser is locked to the saturated fluorescence in a thermal Sr atomic beam and is measured with an optical-frequency comb generator referenced to the SI second through a global positioning system signal. The Sr-88 transition is measured to be at 434 829 121 311 (10) kHz. We measure also the Sr-88-Sr-86 isotope shift to be 163 817.4 (0.2) kHz.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 91 (24)      Pages from: 243002-1  to: 243002-4

KeyWords: spectroscopy; strontium;
DOI: 10.1103/PhysRevLett.91.243002

Citations: 66
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