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arXiv:2306.11082 · Physical Review Research

Absolute frequency measurements on the 5 s 5 p 3 P 0 → 5 s 6 d 3 D 1 transition in strontium

Shengnan Zhang, B. S. Tiwari, Sandhya Ganesh, Yeshpal Singh, V. V. Flambaum

Published Nov 5, 2024• 1 citation
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Abstract

We report the first absolute frequency measurements for the 5 s 5 p 3 P 0 → 5 s 6 d 3 D 1 transition at 394 nm for all the stable strontium isotopes by utilizing repumping induced spectroscopy in a magneto-optical trap. Absolute transition frequency is measured to be 760524409251(25) kHz for Sr 88 . With reference to Sr 88 , the isotope shifts are measured to be 91052(35), 54600(33), and 51641(28) kHz for Sr 84 , Sr 86 , and Sr 87 , respectively. We calculate the hyperfine constants A and B for the fermionic isotope Sr 87 at kHz level. Furthermore, we perform King plot analysis by combining isotope shifts on the 689-nm transition to our data. Published by the American Physical Society 2024

DOI
10.1103/physrevresearch.6.043106

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Bulletin of the Polish Academy of Sciences Technical Sciences•Dec 1, 2012•4 citations
We report the first absolute frequency measurements for the 5 s 5 p 3 P 0 → 5 s 6 d 3 D 1 transition at 394 nm for all the stable strontium isotopes by utilizing repumping induced spectroscopy in a magneto-optical trap. Absolute transition frequency is measured to be 760524409251(25) kHz for Sr 88 . With reference to Sr 88 , the isotope shifts are measured to be 91052(35), 54600(33), and 51641(28) kHz for Sr 84 , Sr 86 , and Sr 87 , respectively. We calculate the hyperfine constants A and B for the fermionic isotope Sr 87 at kHz level. Furthermore, we perform King plot analysis by combining isotope shifts on the 689-nm transition to our data. Published by the American Physical Society 2024
Spectroscopy of the 5s5p5s5p5s5p $ ^3 P_0 \rightarrow 5s5d$ $ ^3 D_1 $ transition of strontium using laser cooled atoms
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We describe repumping and spectroscopy of laser-cooled strontium (Sr) atoms using the (5s5p) 3 P 2 –(5s4d) 3 D 2 transition. Atom number in a magneto-optical trap is enhanced by driving this transition because Sr atoms that have decayed into the (5s5p) 3 P 2 dark state are repumped back into the (5s 2 ) 1 S 0 ground state. Spectroscopy of 84 Sr, 86 Sr, 87 Sr and 88 Sr improves the value of the (5s5p) 3 P 2 –(5s4d) 3 D 2 transition frequency and determines the isotope shifts for the transition accurately enough to guide laser-cooling experiments with less abundant isotopes.
Abstract The isotopic shifts of the 5s 2S1/2–5p 2P1/2 cooling transition, the 5p 2P1/2–4d 2D3/2 pumping transition, and the 5s 2S1/2–4d 2D5/2 electroquadrupole transition are measured in monoisotopic clouds of strontium ions: 88Sr+, 86Sr+, and 84Sr+. To the best of our knowledge, the isotopic shift of the clock transition at 674 nm in 84Sr+ is measured for the first time and is found to be 1186.7(7.2) MHz. The obtained experimental data is used to construct a King diagram, which allows the field (F) and mass (K) shift constants to be estimated for the transition at a wavelength of 674 nm. The obtained results can be used to test atomic structure calculations, sympathetic cooling, and quantum algorithms.
Abstract This report concerns the experiment of precision spectroscopy of cold strontium atoms in the Polish National Laboratory of Atomic, Molecular and Optical Physics in Toruń. The system is composed of a Zeeman slower and magneto-optical traps (at 461 nm and 689 nm), a frequency comb, and a narrow-band laser locked to an ultra-stable optical cavity. All parts of the experiment are prepared and the first measurements of the absolute frequency of the 1S0-3P1, 689 nm optical transition in 88Sr atoms are performed.