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Physical Review A

Two-photon spectroscopy of the francium 8S1/2 level

J. E. Simsarian, W. Z. Zhao, Luis A. Orozco, Gene D. Sprouse

Published Jan 1, 1999• 30 citations
Publisher

Abstract

We report the spectroscopy of the ${8S}_{1/2}$ energy level in ${}^{210}\mathrm{Fr}$ by two-photon excitation of atoms confined and cooled in a magneto-optical trap. The resonant intermediate level is the upper state of either the ${7P}_{3/2}$ trapping transition or the ${7P}_{1/2}$ repumping transition. The center-of-gravity energy difference between the ${7S}_{1/2}$ ground level and the ${8S}_{1/2}$ level is $19732.523\ifmmode\pm\else\textpm\fi{}0.004 {\mathrm{cm}}^{\ensuremath{-}1}.$ The hyperfine separation of the ${8S}_{1/2},F=11/2$ and $F=13/2$ states is $10256\ifmmode\pm\else\textpm\fi{}7 \mathrm{MHz},$ giving a magnetic dipole hyperfine constant A of $1577.8\ifmmode\pm\else\textpm\fi{}1.1 \mathrm{MHz}.$

DOI
10.1103/physreva.59.195

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