High-Precision Measurement of the Laser-Trapping Frequencies for ^209,210,211Fr Atoms

2008/07/28 by S. Sanguinetti, R. Calabrese, Sanguinetti, S. +22
Physics and Astronomy · #Advanced Frequency and Time Standards #Atomic Physics (physics.atom-ph) #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Radioactive Decay and Measurement Techniques #physics.atom-ph

paper · pdf · doi:10.48550/arxiv.0807.4397

4 pages, 2 figures, 1 table

arxiv created 2008/07/28 · openalex publication_date 2008/07/28 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present the accurate measurement of the frequency of the 7S-7P laser-trapping transition for three francium isotopes. Our approach is based on an interferometric comparison to deduce the unknown laser frequency from a secondary laser frequency-standard. After careful investigation of systematics, with samples of about 100 atoms the final accuracy reaches 8 MHz, an order of magnitude better than the best previous measurement for ²¹⁰Fr, and opens the way to improved tests of the theoretical computation of Fr atomic structure.

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