A clock transition for a future optical frequency standard with trapped atoms

We report the first direct excitation of the strongly forbidden 5s2 1S0-5s5p 3P0 transition in 87Sr. Its frequency is 429 228 004 235 (20) kHz. A resonant laser creates a small leak in a magneto-optical trap (MOT): atoms build up to the metastable 3P0 state and escape the trapping process, leading t...

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Published inarXiv.org
Main Authors Courtillot, I, Quessada, A, Kovacich, R P, Brusch, A, Kolker, D, J-J Zondy, Rovera, G D, Lemonde, P
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 06.03.2003
Subjects
Dipoles
Fluorescence
Frequency standards
Optical frequency
Strontium 87
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Summary:We report the first direct excitation of the strongly forbidden 5s2 1S0-5s5p 3P0 transition in 87Sr. Its frequency is 429 228 004 235 (20) kHz. A resonant laser creates a small leak in a magneto-optical trap (MOT): atoms build up to the metastable 3P0 state and escape the trapping process, leading to a detectable decrease in the MOT fluorescence. This line has a natural width of 10^{-3} Hz and can be used for a new generation of optical frequency standards using atoms trapped in a light shift free dipole trap.
ISSN:2331-8422
DOI:10.48550/arxiv.0303023