2018/07/20 by Dominik Studer, Lena Maske, Patrick Windpassinger +2 · 7 citations
Chemistry · Physics and Astronomy · #Advanced Frequency and Time Standards #Atomic and Molecular Physics #Atomic physics #Chemistry #Cold Atom Physics and Bose-Einstein Condensates #Dysprosium #Excitation #Excited state #Ground state #Laser #Laser linewidth #Optics #Physics #Sapphire #Spectroscopy #physics.atom-ph
paper · pdf · doi:10.1103/physreva.98.042504
published in Physical Review A 98(4) (American Physical Society)
arxiv created 2018/07/20 · openalex publication_date 2018/10/10 · arxiv updated 2018/10/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present a direct excitation of the presumably ultranarrow 1001\ensuremath-nm ground-state transition in atomic dysprosium. By using resonance ionization spectroscopy with pulsed Ti:sapphire lasers at a hot cavity laser ion source, we were able to measure the isotopic shifts in the 1001\ensuremath-nm line between all seven stable isotopes. Furthermore, we determined the upper level energy from the atomic transition frequency of the 164Dy isotope as 9991.004(1)\phantom\rule0.16em0excm^\ensuremath-1 and confirm the level energy listed in the NIST database. Since a sufficiently narrow natural linewidth is an essential prerequisite for high-precision spectroscopic investigations for fundamental questions, we furthermore determined a lower limit of 2.9(1)\phantom\rule0.16em0ex\ensuremathμs for the lifetime of the excited state.