Lifetime Measurement of the 8s Level in Francium
arXiv:physics/0412073 · doi:10.1103/PhysRevA.71.062504
Abstract
We measure the lifetime of the 8s level on a magneto-optically trapped sample of ^{210}Fr atoms with time-correlated single-photon counting. The 7P_{1/2} state serves as the resonant intermediate level for two-photon excitation of the 8s level completed with a 1300 nm laser. Analysis of the fluorescence decay through the the 7P_{3/2} level gives 53.30 +- 0.44 ns for the 8s level lifetime.
4 pages, 4 figures