Year: 2004
Type: article
Abstract: We have measured the frequency splitting between the $(2S,F=1∕2)$ and $(2S,F=3∕2)$ hyperfine sublevels in atomic deuterium by an optical differential method based on two-photon Doppler-free spectroscopy on a cold atomic beam. The result ${f}_{\mathrm{HFS}}^{(D)}(2S)=40\phantom{\rule{0.2em}{0ex}}924\phantom{\rule{0.2em}{0ex}}454(7)\phantom{\rule{0.3em}{0ex}}\mathrm{Hz}$ is the most precise value for this interval to date. In comparison to previous radio-frequency measurements we have improved the accuracy by a factor of 3. The specific combination ${D}_{21}=8{f}_{\mathrm{HFS}}^{(D)}(2S)\ensuremath{-}{f}_{\mathrm{HFS}}^{(D)}(1S)$ of metastable and ground state hyperfine frequency intervals in deuterium derived from our measurement agrees well with the value for ${D}_{21}$ calculated from quantum electrodynamics.
Source: Physical Review A
Institutions: Max Planck Society, Max Planck Institute of Quantum Optics
Language: Latvian
Topic: Atomic and Molecular Physics
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2082746939