Friebe, J.; Riedmann, M.; Wübbena, T.; Pape, A.; Kelkar, H. et al.: Remote frequency measurement of the 1S 0→ 3P 1 transition in laser-cooled 24Mg. In: New Journal of Physics 13 (2011), 125010. DOI:
https://doi.org/10.1088/1367-2630/13/12/125010
Zusammenfassung: |
We perform Ramsey-Bordé spectroscopy on laser-cooled magnesium atoms in free fall to measure the 1S 0→ 3P 1 intercombination transition frequency. The measured value of 655 659 923 839 730 (48) Hz is consistent with our former atomic beam measurement (Friebe et al 2008 Phys. Rev. A 78 033830). We improve upon the fractional accuracy of the previous measurement by more than an order of magnitude to 7×10 -14. The magnesium frequency standard was referenced to a fountain clock of the Physikalisch Technische Bundesanstalt (PTB) via a phase-stabilized telecom fiber link and its stability was characterized for interrogation times up to 8000 s. The high temperature of the atomic ensemble leads to a systematic shift due to the motion of atoms across the spectroscopy beams. In our regime, this leads to a counterintuitive reduction of residual Doppler shift with increasing resolution. Our theoretical model of the atom-light interaction is in agreement with the observed effect and allows us to quantify its contribution in the uncertainty budget.
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Lizenzbestimmungen: |
CC BY-NC-SA 3.0 Unported - https://creativecommons.org/licenses/by-nc-sa/3.0/
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Publikationstyp: |
Article |
Publikationsstatus: |
publishedVersion |
Erstveröffentlichung: |
2011 |
Schlagwörter (englisch): |
Atom-light interactions, Atomic ensemble, Free fall, Frequency measurements, High temperature, Laser-cooled, Magnesium atom, Motion of atoms, Physikalisch-technische bundesanstalt, Telecom fibers, Theoretical models, Transition frequencies, Uncertainty budget, Atoms, Frequency standards, Laser cooling, Magnesium, Atomic spectroscopy
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Fachliche Zuordnung (DDC): |
530 | Physik
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