We realize an experimental facility for cooling and trapping strontium (Sr) atoms and measure the Landé g factor of 3D1 of 88Sr. Thanks to a novel repumping scheme with the 3P2 → 3S1 and 3P0 → 3D1 combination and the permanent magnets based self-assembled Zeeman slower, the peak atom number in the continuously repumped blue magneto-optical trap is enhanced by a factor of 15 with respect to the non-repumping case, and reaches ∼1 billion. Furthermore, using the resolved-sideband Zeeman spectroscopy, the Landé g factor of 3D1 is measured to be 0.4995(88) showing a good agreement with the theoretical value of 0.4988. The results will have an impact on various applications including atom laser, dipolar interactions, quantum information and precision measurements.

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We perform spectroscopy of 5s5p3P0-5s4d3D1 in magneto-optically trapped Sr atoms for various power of 2.6 μm laser. We develop a compact distributed feedback (DFB) laser at 2.6 μm as the light source for probing spectroscopy. The absolute frequency of the 5s5p3P0-5s4d3D1 transition is expected to be measured by the accurate spectroscopy with the frequency comb or high-resolution wavemeter.

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