Abstract

We report what is to our knowledge the first two-photon-excited fluorescence spectroscopy of atomic fluorine. Adoubled dye laser at 286 nm is Raman shifted in H2 to 170 nm (sixth anti-Stokes order) to excite ground-state 2PJ° fluorine atoms to the 2DJ° level. The fluorine atoms are detected by one of two methods: observing the fluorescencedecay to the 2PJ level or observing F+ production through the absorption of an additional photon by the excitedatoms. We have measured relative two-photon absorption cross sections to and the radiative lifetimes of the 2DJ° states.

© 1988 Optical Society of America

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