Lifetime measurement of the 9s level of atomic francium.
We use two-photon resonant excitation and time-correlated single-photon counting techniques on a sample of 210Fr atoms confined and cooled in a magneto-optical trap to measure the lifetime of the 9s excited level. Direct measurement of the decay through the 7P(3/2) level at 851 nm yields a lifetime of 107.53 +/- 0.80 ns.
Aubin
S
S
Department of Physics and Astronomy, State University of New York, Stony Brook, New York 11794-3800, USA.
Gomez
E
E
Orozco
L A
LA
Sprouse
G D
GD