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Precise measurement of hyperfine structure in the $5P_{3/2}$ state of $^{85}$Rb

Umakant D. Rapol·Anusha Krishna·Vasant Natarajan
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Abstract

We demonstrate a technique to measure hyperfine structure using a frequency-stabilized diode laser and an acousto-optic modulator locked to the frequency difference between two hyperfine peaks. We use this technique to measure hyperfine intervals in the $5P_{3/2}$ state of $^{85}$Rb and obtain a precision of 20 kHz. We extract values for the magnetic-dipole coupling constant $A=25.038(5)$ MHz and the electric-quadrupole coupling constant $B=26.011(22)$ MHz. These values are a significant improvement over previous results.

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Umakant D. Rapol, Anusha Krishna, Vasant Natarajan. 2003-07-18. Precise measurement of hyperfine structure in the $5P_{3/2}$ state of $^{85}$Rb. https://doi.org/10.1140/epjd%2Fe2003-00069-9

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