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We demonstrate that laser cooling, combined with V-scheme optical double-resonance spectroscopy, provides a sensitive means to measure isotope shifts and hyperfine splittings. Our technique is illustrated using the 398.8-nm (6s²)¹S₀-(6s6p)¹P₁ and 555.6-nm (6s²)¹S₀-(6s6p)³P₁ transitions in a neutral ytterbium atomic beam having natural isotopic composition. With a precision comparable to existing approaches, our unique method has enabled the most complete single-technique survey to date of the ¹S₀-¹P₁ isotope shifts and hyperfine splittings.
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Loftus et al. (2001) studied this question.
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