Measurement of the hyperfine splitting of the 6S${}_{1/2}$ level in rubidium

Abstract

We present a measurement of the hyperfine splitting of the 6S${}_{1/2}$ excited level of rubidium using two photon absorption spectroscopy in a glass cell. The values we obtain for the magnetic dipole constant A are 239.18(03) MHz and 807.66(08) MHz for ${}^{85}$Rb and ${}^{87}$Rb, respectively. The combination of the magnetic moments of the two isotopes and our measurements show a hyperfine anomaly in this atomic excited state. The observed hyperfine anomaly difference has a value of ${}_{87}{\delta }_{85}=-0.0036(2)$ due to the finite distribution of nuclear magnetization, the Bohr-Weisskopf effect.

12 pages, 14 figures

References in corpus (1)

• Comparison of hyperfine anomalies in the 5S_{1/2} and 6S_{1/2} levels of ^{85}Rb and ^{87}Rb

Cited by in corpus (5)

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• The Bohr-Weisskopf effect: from hydrogenlike-ion experiments to heavy-atom calculations of the hyperfine structure
• A simple, narrow, and robust atomic frequency reference at 993 nm exploiting the rubidium (Rb) $5S_{1/2}$ to $6S_{1/2}$ transition using one-color two-photon excitation
• Measurement of the ${}^{20-22}$Ne ${}^3$P${}_2$-${}^3$D${}_3$ transition isotope shift using a single, phase modulated laser beam